diff -Nurb linux-2.6.22-570/Documentation/DocBook/Makefile linux-2.6.22-try2/Documentation/DocBook/Makefile
--- linux-2.6.22-570/Documentation/DocBook/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/DocBook/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -11,7 +11,7 @@
procfs-guide.xml writing_usb_driver.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml \
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
- genericirq.xml
+ genericirq.xml kgdb.xml
###
# The build process is as follows (targets):
diff -Nurb linux-2.6.22-570/Documentation/DocBook/kgdb.tmpl linux-2.6.22-try2/Documentation/DocBook/kgdb.tmpl
--- linux-2.6.22-570/Documentation/DocBook/kgdb.tmpl 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/DocBook/kgdb.tmpl 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,250 @@
+
+
+
+
+
+ KGDB Internals
+
+
+
+ Tom
+ Rini
+
+
+ trini@kernel.crashing.org
+
+
+
+
+
+
+
+ Amit S.
+ Kale
+
+
+ amitkale@linsyssoft.com
+
+
+
+
+
+
+ 2004-2005
+ MontaVista Software, Inc.
+
+
+ 2004
+ Amit S. Kale
+
+
+
+
+ This file is licensed under the terms of the GNU General Public License
+ version 2. This program is licensed "as is" without any warranty of any
+ kind, whether express or implied.
+
+
+
+
+
+
+
+ Introduction
+
+ kgdb is a source level debugger for linux kernel. It is used along
+ with gdb to debug a linux kernel. Kernel developers can debug a kernel
+ similar to application programs with the use of kgdb. It makes it
+ possible to place breakpoints in kernel code, step through the code
+ and observe variables.
+
+
+ Two machines are required for using kgdb. One of these machines is a
+ development machine and the other is a test machine. The machines are
+ typically connected through a serial line, a null-modem cable which
+ connects their serial ports. It is also possible however, to use an
+ ethernet connection between the machines. The kernel to be debugged
+ runs on the test machine. gdb runs on the development machine. The
+ serial line or ethernet connection is used by gdb to communicate to
+ the kernel being debugged.
+
+
+
+ Compiling a kernel
+
+ To enable CONFIG_KGDB, look under the "Kernel debugging"
+ and then select "KGDB: kernel debugging with remote gdb".
+
+
+ The first choice for I/O is CONFIG_KGDB_ONLY_MODULES.
+ This means that you will only be able to use KGDB after loading a
+ kernel module that defines how you want to be able to talk with
+ KGDB. There are two other choices (more on some architectures) that
+ can be enabled as modules later, if not picked here.
+
+ The first of these is CONFIG_KGDB_8250_NOMODULE.
+ This has sub-options such as CONFIG_KGDB_SIMPLE_SERIAL
+ which toggles choosing the serial port by ttyS number or by specifying
+ a port and IRQ number.
+
+
+ The second of these choices on most systems for I/O is
+ CONFIG_KGDBOE. This requires that the machine to be
+ debugged has an ethernet card which supports the netpoll API, such as
+ the cards supported by CONFIG_E100. There are no
+ sub-options for this, but a kernel command line option is required.
+
+
+
+ Booting the kernel
+
+ The Kernel command line option kgdbwait makes kgdb
+ wait for gdb connection during booting of a kernel. If the
+ CONFIG_KGDB_8250 driver is used (or if applicable,
+ another serial driver) this breakpoint will happen very early on, before
+ console output. If you wish to change serial port information and you
+ have enabled both CONFIG_KGDB_8250 and
+ CONFIG_KGDB_SIMPLE_SERIAL then you must pass the option
+ kgdb8250=<io or mmio>,<address>,<baud
+ rate>,<irq> before kgdbwait.
+ The values io or mmio refer to
+ if the address being passed next needs to be memory mapped
+ (mmio) or not. The address must
+ be passed in hex and is the hardware address and will be remapped if
+ passed as mmio. The value
+ baud rate and irq are base-10.
+ The supported values for baud rate are
+ 9600, 19200,
+ 38400, 57600, and
+ 115200.
+
+
+ To have KGDB stop the kernel and wait, with the compiled values for the
+ serial driver, pass in: kgdbwait.
+
+
+ To specify the values of the SH SCI(F) serial port at boot:
+ kgdbsci=0,115200.
+
+
+ To specify the values of the serial port at boot:
+ kgdb8250=io,3f8,115200,3.
+ On IA64 this could also be:
+ kgdb8250=mmio,0xff5e0000,115200,74
+ And to have KGDB also stop the kernel and wait for GDB to connect, pass in
+ kgdbwait after this arguement.
+
+
+ To configure the CONFIG_KGDBOE driver, pass in
+ kgdboe=[src-port]@<src-ip>/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]
+ where:
+
+ src-port (optional): source for UDP packets (defaults to 6443)
+ src-ip: source IP to use (interface address)
+ dev (optional): network interface (eth0)
+ tgt-port (optional): port GDB will use (defaults to 6442)
+ tgt-ip: IP address GDB will be connecting from
+ tgt-macaddr (optional): ethernet MAC address for logging agent (default is broadcast)
+
+
+
+ The CONFIG_KGDBOE driver can be reconfigured at run
+ time, if CONFIG_SYSFS and
+ CONFIG_MODULES by echo'ing a new config string to
+ /sys/module/kgdboe/parameter/kgdboe. The
+ driver can be unconfigured with the special string
+ not_configured.
+
+
+
+ Connecting gdb
+
+ If you have used any of the methods to have KGDB stop and create
+ an initial breakpoint described in the previous chapter, kgdb prints
+ the message "Waiting for connection from remote gdb..." on the console
+ and waits for connection from gdb. At this point you connect gdb to kgdb.
+
+
+ Example (serial):
+
+
+ % gdb ./vmlinux
+ (gdb) set remotebaud 115200
+ (gdb) target remote /dev/ttyS0
+
+
+ Example (ethernet):
+
+
+ % gdb ./vmlinux
+ (gdb) target remote udp:192.168.2.2:6443
+
+
+ Once connected, you can debug a kernel the way you would debug an
+ application program.
+
+
+
+ Architecture specific notes
+
+ SuperH: The NMI switch found on some boards can be used to trigger an
+ initial breakpoint. Subsequent triggers do nothing. If console
+ is enabled on the SCI(F) serial port, and that is the port being used
+ for KGDB, then you must trigger a breakpoint via sysrq, NMI, or
+ some other method prior to connecting, or echo a control-c to the
+ serial port. Also, to use the SCI(F) port for KGDB, the
+ CONFIG_SERIAL_SH_SCI driver must be enabled.
+
+
+
+ The common backend (required)
+
+ There are a few flags which must be set on every architecture in
+ their <asm/kgdb.h> file. These are:
+
+
+
+ NUMREGBYTES: The size in bytes of all of the registers, so
+ that we can ensure they will all fit into a packet.
+
+
+ BUFMAX: The size in bytes of the buffer GDB will read into.
+ This must be larger than NUMREGBYTES.
+
+
+ CACHE_FLUSH_IS_SAFE: Set to one if it always safe to call
+ flush_cache_range or flush_icache_range. On some architectures,
+ these functions may not be safe to call on SMP since we keep other
+ CPUs in a holding pattern.
+
+
+
+
+
+ There are also the following functions for the common backend,
+ found in kernel/kgdb.c that must be supplied by the
+ architecture-specific backend. No weak version of these is provided.
+
+!Iinclude/linux/kgdb.h
+
+
+ The common backend (optional)
+
+ These functions are part of the common backend, found in kernel/kgdb.c
+ and are optionally implemented. Some functions (with _hw_ in the name)
+ end up being required on arches which use hardware breakpoints.
+
+!Ikernel/kgdb.c
+
+
+ Driver-Specific Functions
+
+ Some of the I/O drivers have additional functions that can be
+ called, that are specific to the driver. Calls from other places
+ to these functions must be wrapped in #ifdefs for the driver in
+ question.
+
+!Idrivers/serial/8250_kgdb.c
+
+
diff -Nurb linux-2.6.22-570/Documentation/accounting/getdelays.c linux-2.6.22-try2/Documentation/accounting/getdelays.c
--- linux-2.6.22-570/Documentation/accounting/getdelays.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/accounting/getdelays.c 2007-12-19 15:29:24.000000000 -0500
@@ -49,6 +49,7 @@
int dbg;
int print_delays;
int print_io_accounting;
+int print_task_context_switch_counts;
__u64 stime, utime;
#define PRINTF(fmt, arg...) { \
@@ -195,7 +196,7 @@
"IO %15s%15s\n"
" %15llu%15llu\n"
"MEM %15s%15s\n"
- " %15llu%15llu\n\n",
+ " %15llu%15llu\n"
"count", "real total", "virtual total", "delay total",
t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total,
t->cpu_delay_total,
@@ -204,6 +205,14 @@
"count", "delay total", t->swapin_count, t->swapin_delay_total);
}
+void task_context_switch_counts(struct taskstats *t)
+{
+ printf("\n\nTask %15s%15s\n"
+ " %15lu%15lu\n",
+ "voluntary", "nonvoluntary",
+ t->nvcsw, t->nivcsw);
+}
+
void print_ioacct(struct taskstats *t)
{
printf("%s: read=%llu, write=%llu, cancelled_write=%llu\n",
@@ -235,7 +244,7 @@
struct msgtemplate msg;
while (1) {
- c = getopt(argc, argv, "diw:r:m:t:p:vl");
+ c = getopt(argc, argv, "qdiw:r:m:t:p:vl");
if (c < 0)
break;
@@ -248,6 +257,10 @@
printf("printing IO accounting\n");
print_io_accounting = 1;
break;
+ case 'q':
+ printf("printing task/process context switch rates\n");
+ print_task_context_switch_counts = 1;
+ break;
case 'w':
logfile = strdup(optarg);
printf("write to file %s\n", logfile);
@@ -389,6 +402,8 @@
print_delayacct((struct taskstats *) NLA_DATA(na));
if (print_io_accounting)
print_ioacct((struct taskstats *) NLA_DATA(na));
+ if (print_task_context_switch_counts)
+ task_context_switch_counts((struct taskstats *) NLA_DATA(na));
if (fd) {
if (write(fd, NLA_DATA(na), na->nla_len) < 0) {
err(1,"write error\n");
diff -Nurb linux-2.6.22-570/Documentation/accounting/taskstats-struct.txt linux-2.6.22-try2/Documentation/accounting/taskstats-struct.txt
--- linux-2.6.22-570/Documentation/accounting/taskstats-struct.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/accounting/taskstats-struct.txt 2007-12-19 15:29:24.000000000 -0500
@@ -22,6 +22,8 @@
/* Extended accounting fields end */
Their values are collected if CONFIG_TASK_XACCT is set.
+4) Per-task and per-thread context switch count statistics
+
Future extension should add fields to the end of the taskstats struct, and
should not change the relative position of each field within the struct.
@@ -158,4 +160,8 @@
/* Extended accounting fields end */
+4) Per-task and per-thread statistics
+ __u64 nvcsw; /* Context voluntary switch counter */
+ __u64 nivcsw; /* Context involuntary switch counter */
+
}
diff -Nurb linux-2.6.22-570/Documentation/cachetlb.txt linux-2.6.22-try2/Documentation/cachetlb.txt
--- linux-2.6.22-570/Documentation/cachetlb.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/cachetlb.txt 2007-12-19 15:29:22.000000000 -0500
@@ -253,7 +253,7 @@
The first of these two routines is invoked after map_vm_area()
has installed the page table entries. The second is invoked
- before unmap_vm_area() deletes the page table entries.
+ before unmap_kernel_range() deletes the page table entries.
There exists another whole class of cpu cache issues which currently
require a whole different set of interfaces to handle properly.
diff -Nurb linux-2.6.22-570/Documentation/containers.txt linux-2.6.22-try2/Documentation/containers.txt
--- linux-2.6.22-570/Documentation/containers.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/containers.txt 2007-12-19 15:29:25.000000000 -0500
@@ -0,0 +1,543 @@
+ CONTAINERS
+ -------
+
+Written by Paul Menage based on Documentation/cpusets.txt
+
+Original copyright statements from cpusets.txt:
+Portions Copyright (C) 2004 BULL SA.
+Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
+Modified by Paul Jackson
+Modified by Christoph Lameter
+
+CONTENTS:
+=========
+
+1. Containers
+ 1.1 What are containers ?
+ 1.2 Why are containers needed ?
+ 1.3 How are containers implemented ?
+ 1.4 What does notify_on_release do ?
+ 1.5 How do I use containers ?
+2. Usage Examples and Syntax
+ 2.1 Basic Usage
+ 2.2 Attaching processes
+3. Kernel API
+ 3.1 Overview
+ 3.2 Synchronization
+ 3.3 Subsystem API
+4. Questions
+
+1. Containers
+==========
+
+1.1 What are containers ?
+----------------------
+
+Containers provide a mechanism for aggregating/partitioning sets of
+tasks, and all their future children, into hierarchical groups with
+specialized behaviour.
+
+Definitions:
+
+A *container* associates a set of tasks with a set of parameters for one
+or more subsystems.
+
+A *subsystem* is a module that makes use of the task grouping
+facilities provided by containers to treat groups of tasks in
+particular ways. A subsystem is typically a "resource controller" that
+schedules a resource or applies per-container limits, but it may be
+anything that wants to act on a group of processes, e.g. a
+virtualization subsystem.
+
+A *hierarchy* is a set of containers arranged in a tree, such that
+every task in the system is in exactly one of the containers in the
+hierarchy, and a set of subsystems; each subsystem has system-specific
+state attached to each container in the hierarchy. Each hierarchy has
+an instance of the container virtual filesystem associated with it.
+
+At any one time there may be multiple active hierachies of task
+containers. Each hierarchy is a partition of all tasks in the system.
+
+User level code may create and destroy containers by name in an
+instance of the container virtual file system, specify and query to
+which container a task is assigned, and list the task pids assigned to
+a container. Those creations and assignments only affect the hierarchy
+associated with that instance of the container file system.
+
+On their own, the only use for containers is for simple job
+tracking. The intention is that other subsystems hook into the generic
+container support to provide new attributes for containers, such as
+accounting/limiting the resources which processes in a container can
+access. For example, cpusets (see Documentation/cpusets.txt) allows
+you to associate a set of CPUs and a set of memory nodes with the
+tasks in each container.
+
+1.2 Why are containers needed ?
+----------------------------
+
+There are multiple efforts to provide process aggregations in the
+Linux kernel, mainly for resource tracking purposes. Such efforts
+include cpusets, CKRM/ResGroups, UserBeanCounters, and virtual server
+namespaces. These all require the basic notion of a
+grouping/partitioning of processes, with newly forked processes ending
+in the same group (container) as their parent process.
+
+The kernel container patch provides the minimum essential kernel
+mechanisms required to efficiently implement such groups. It has
+minimal impact on the system fast paths, and provides hooks for
+specific subsystems such as cpusets to provide additional behaviour as
+desired.
+
+Multiple hierarchy support is provided to allow for situations where
+the division of tasks into containers is distinctly different for
+different subsystems - having parallel hierarchies allows each
+hierarchy to be a natural division of tasks, without having to handle
+complex combinations of tasks that would be present if several
+unrelated subsystems needed to be forced into the same tree of
+containers.
+
+At one extreme, each resource controller or subsystem could be in a
+separate hierarchy; at the other extreme, all subsystems
+would be attached to the same hierarchy.
+
+As an example of a scenario (originally proposed by vatsa@in.ibm.com)
+that can benefit from multiple hierarchies, consider a large
+university server with various users - students, professors, system
+tasks etc. The resource planning for this server could be along the
+following lines:
+
+ CPU : Top cpuset
+ / \
+ CPUSet1 CPUSet2
+ | |
+ (Profs) (Students)
+
+ In addition (system tasks) are attached to topcpuset (so
+ that they can run anywhere) with a limit of 20%
+
+ Memory : Professors (50%), students (30%), system (20%)
+
+ Disk : Prof (50%), students (30%), system (20%)
+
+ Network : WWW browsing (20%), Network File System (60%), others (20%)
+ / \
+ Prof (15%) students (5%)
+
+Browsers like firefox/lynx go into the WWW network class, while (k)nfsd go
+into NFS network class.
+
+At the same time firefox/lynx will share an appropriate CPU/Memory class
+depending on who launched it (prof/student).
+
+With the ability to classify tasks differently for different resources
+(by putting those resource subsystems in different hierarchies) then
+the admin can easily set up a script which receives exec notifications
+and depending on who is launching the browser he can
+
+ # echo browser_pid > /mnt///tasks
+
+With only a single hierarchy, he now would potentially have to create
+a separate container for every browser launched and associate it with
+approp network and other resource class. This may lead to
+proliferation of such containers.
+
+Also lets say that the administrator would like to give enhanced network
+access temporarily to a student's browser (since it is night and the user
+wants to do online gaming :) OR give one of the students simulation
+apps enhanced CPU power,
+
+With ability to write pids directly to resource classes, its just a
+matter of :
+
+ # echo pid > /mnt/network//tasks
+ (after some time)
+ # echo pid > /mnt/network//tasks
+
+Without this ability, he would have to split the container into
+multiple separate ones and then associate the new containers with the
+new resource classes.
+
+
+
+1.3 How are containers implemented ?
+---------------------------------
+
+Containers extends the kernel as follows:
+
+ - Each task in the system has a reference-counted pointer to a
+ css_group.
+
+ - A css_group contains a set of reference-counted pointers to
+ container_subsys_state objects, one for each container subsystem
+ registered in the system. There is no direct link from a task to
+ the container of which it's a member in each hierarchy, but this
+ can be determined by following pointers through the
+ container_subsys_state objects. This is because accessing the
+ subsystem state is something that's expected to happen frequently
+ and in performance-critical code, whereas operations that require a
+ task's actual container assignments (in particular, moving between
+ containers) are less common. A linked list runs through the cg_list
+ field of each task_struct using the css_group, anchored at
+ css_group->tasks.
+
+ - A container hierarchy filesystem can be mounted for browsing and
+ manipulation from user space.
+
+ - You can list all the tasks (by pid) attached to any container.
+
+The implementation of containers requires a few, simple hooks
+into the rest of the kernel, none in performance critical paths:
+
+ - in init/main.c, to initialize the root containers and initial
+ css_group at system boot.
+
+ - in fork and exit, to attach and detach a task from its css_group.
+
+In addition a new file system, of type "container" may be mounted, to
+enable browsing and modifying the containers presently known to the
+kernel. When mounting a container hierarchy, you may specify a
+comma-separated list of subsystems to mount as the filesystem mount
+options. By default, mounting the container filesystem attempts to
+mount a hierarchy containing all registered subsystems.
+
+If an active hierarchy with exactly the same set of subsystems already
+exists, it will be reused for the new mount. If no existing hierarchy
+matches, and any of the requested subsystems are in use in an existing
+hierarchy, the mount will fail with -EBUSY. Otherwise, a new hierarchy
+is activated, associated with the requested subsystems.
+
+It's not currently possible to bind a new subsystem to an active
+container hierarchy, or to unbind a subsystem from an active container
+hierarchy. This may be possible in future, but is fraught with nasty
+error-recovery issues.
+
+When a container filesystem is unmounted, if there are any
+subcontainers created below the top-level container, that hierarchy
+will remain active even though unmounted; if there are no
+subcontainers then the hierarchy will be deactivated.
+
+No new system calls are added for containers - all support for
+querying and modifying containers is via this container file system.
+
+Each task under /proc has an added file named 'container' displaying,
+for each active hierarchy, the subsystem names and the container name
+as the path relative to the root of the container file system.
+
+Each container is represented by a directory in the container file system
+containing the following files describing that container:
+
+ - tasks: list of tasks (by pid) attached to that container
+ - notify_on_release flag: run /sbin/container_release_agent on exit?
+
+Other subsystems such as cpusets may add additional files in each
+container dir
+
+New containers are created using the mkdir system call or shell
+command. The properties of a container, such as its flags, are
+modified by writing to the appropriate file in that containers
+directory, as listed above.
+
+The named hierarchical structure of nested containers allows partitioning
+a large system into nested, dynamically changeable, "soft-partitions".
+
+The attachment of each task, automatically inherited at fork by any
+children of that task, to a container allows organizing the work load
+on a system into related sets of tasks. A task may be re-attached to
+any other container, if allowed by the permissions on the necessary
+container file system directories.
+
+When a task is moved from one container to another, it gets a new
+css_group pointer - if there's an already existing css_group with the
+desired collection of containers then that group is reused, else a new
+css_group is allocated. Note that the current implementation uses a
+linear search to locate an appropriate existing css_group, so isn't
+very efficient. A future version will use a hash table for better
+performance.
+
+To allow access from a container to the css_groups (and hence tasks)
+that comprise it, a set of cg_container_link objects form a lattice;
+each cg_container_link is linked into a list of cg_container_links for
+a single container on its cont_link_list field, and a list of
+cg_container_links for a single css_group on its cg_link_list.
+
+Thus the set of tasks in a container can be listed by iterating over
+each css_group that references the container, and sub-iterating over
+each css_group's task set.
+
+The use of a Linux virtual file system (vfs) to represent the
+container hierarchy provides for a familiar permission and name space
+for containers, with a minimum of additional kernel code.
+
+1.4 What does notify_on_release do ?
+------------------------------------
+
+*** notify_on_release is disabled in the current patch set. It will be
+*** reactivated in a future patch in a less-intrusive manner
+
+If the notify_on_release flag is enabled (1) in a container, then
+whenever the last task in the container leaves (exits or attaches to
+some other container) and the last child container of that container
+is removed, then the kernel runs the command specified by the contents
+of the "release_agent" file in that hierarchy's root directory,
+supplying the pathname (relative to the mount point of the container
+file system) of the abandoned container. This enables automatic
+removal of abandoned containers. The default value of
+notify_on_release in the root container at system boot is disabled
+(0). The default value of other containers at creation is the current
+value of their parents notify_on_release setting. The default value of
+a container hierarchy's release_agent path is empty.
+
+1.5 How do I use containers ?
+--------------------------
+
+To start a new job that is to be contained within a container, using
+the "cpuset" container subsystem, the steps are something like:
+
+ 1) mkdir /dev/container
+ 2) mount -t container -ocpuset cpuset /dev/container
+ 3) Create the new container by doing mkdir's and write's (or echo's) in
+ the /dev/container virtual file system.
+ 4) Start a task that will be the "founding father" of the new job.
+ 5) Attach that task to the new container by writing its pid to the
+ /dev/container tasks file for that container.
+ 6) fork, exec or clone the job tasks from this founding father task.
+
+For example, the following sequence of commands will setup a container
+named "Charlie", containing just CPUs 2 and 3, and Memory Node 1,
+and then start a subshell 'sh' in that container:
+
+ mount -t container cpuset -ocpuset /dev/container
+ cd /dev/container
+ mkdir Charlie
+ cd Charlie
+ /bin/echo $$ > tasks
+ sh
+ # The subshell 'sh' is now running in container Charlie
+ # The next line should display '/Charlie'
+ cat /proc/self/container
+
+2. Usage Examples and Syntax
+============================
+
+2.1 Basic Usage
+---------------
+
+Creating, modifying, using the containers can be done through the container
+virtual filesystem.
+
+To mount a container hierarchy will all available subsystems, type:
+# mount -t container xxx /dev/container
+
+The "xxx" is not interpreted by the container code, but will appear in
+/proc/mounts so may be any useful identifying string that you like.
+
+To mount a container hierarchy with just the cpuset and numtasks
+subsystems, type:
+# mount -t container -o cpuset,numtasks hier1 /dev/container
+
+To change the set of subsystems bound to a mounted hierarchy, just
+remount with different options:
+
+# mount -o remount,cpuset,ns /dev/container
+
+Note that changing the set of subsystems is currently only supported
+when the hierarchy consists of a single (root) container. Supporting
+the ability to arbitrarily bind/unbind subsystems from an existing
+container hierarchy is intended to be implemented in the future.
+
+Then under /dev/container you can find a tree that corresponds to the
+tree of the containers in the system. For instance, /dev/container
+is the container that holds the whole system.
+
+If you want to create a new container under /dev/container:
+# cd /dev/container
+# mkdir my_container
+
+Now you want to do something with this container.
+# cd my_container
+
+In this directory you can find several files:
+# ls
+notify_on_release release_agent tasks
+(plus whatever files are added by the attached subsystems)
+
+Now attach your shell to this container:
+# /bin/echo $$ > tasks
+
+You can also create containers inside your container by using mkdir in this
+directory.
+# mkdir my_sub_cs
+
+To remove a container, just use rmdir:
+# rmdir my_sub_cs
+
+This will fail if the container is in use (has containers inside, or
+has processes attached, or is held alive by other subsystem-specific
+reference).
+
+2.2 Attaching processes
+-----------------------
+
+# /bin/echo PID > tasks
+
+Note that it is PID, not PIDs. You can only attach ONE task at a time.
+If you have several tasks to attach, you have to do it one after another:
+
+# /bin/echo PID1 > tasks
+# /bin/echo PID2 > tasks
+ ...
+# /bin/echo PIDn > tasks
+
+3. Kernel API
+=============
+
+3.1 Overview
+------------
+
+Each kernel subsystem that wants to hook into the generic container
+system needs to create a container_subsys object. This contains
+various methods, which are callbacks from the container system, along
+with a subsystem id which will be assigned by the container system.
+
+Other fields in the container_subsys object include:
+
+- subsys_id: a unique array index for the subsystem, indicating which
+ entry in container->subsys[] this subsystem should be
+ managing. Initialized by container_register_subsys(); prior to this
+ it should be initialized to -1
+
+- hierarchy: an index indicating which hierarchy, if any, this
+ subsystem is currently attached to. If this is -1, then the
+ subsystem is not attached to any hierarchy, and all tasks should be
+ considered to be members of the subsystem's top_container. It should
+ be initialized to -1.
+
+- name: should be initialized to a unique subsystem name prior to
+ calling container_register_subsystem. Should be no longer than
+ MAX_CONTAINER_TYPE_NAMELEN
+
+Each container object created by the system has an array of pointers,
+indexed by subsystem id; this pointer is entirely managed by the
+subsystem; the generic container code will never touch this pointer.
+
+3.2 Synchronization
+-------------------
+
+There is a global mutex, container_mutex, used by the container
+system. This should be taken by anything that wants to modify a
+container. It may also be taken to prevent containers from being
+modified, but more specific locks may be more appropriate in that
+situation.
+
+See kernel/container.c for more details.
+
+Subsystems can take/release the container_mutex via the functions
+container_lock()/container_unlock(), and can
+take/release the callback_mutex via the functions
+container_lock()/container_unlock().
+
+Accessing a task's container pointer may be done in the following ways:
+- while holding container_mutex
+- while holding the task's alloc_lock (via task_lock())
+- inside an rcu_read_lock() section via rcu_dereference()
+
+3.3 Subsystem API
+--------------------------
+
+Each subsystem should:
+
+- add an entry in linux/container_subsys.h
+- define a container_subsys object called _subsys
+
+Each subsystem may export the following methods. The only mandatory
+methods are create/destroy. Any others that are null are presumed to
+be successful no-ops.
+
+int create(struct container *cont)
+LL=container_mutex
+
+Called to create a subsystem state object for a container. The
+subsystem should set its subsystem pointer for the passed container,
+returning 0 on success or a negative error code. On success, the
+subsystem pointer should point to a structure of type
+container_subsys_state (typically embedded in a larger
+subsystem-specific object), which will be initialized by the container
+system. Note that this will be called at initialization to create the
+root subsystem state for this subsystem; this case can be identified
+by the passed container object having a NULL parent (since it's the
+root of the hierarchy) and may be an appropriate place for
+initialization code.
+
+void destroy(struct container *cont)
+LL=container_mutex
+
+The container system is about to destroy the passed container; the
+subsystem should do any necessary cleanup
+
+int can_attach(struct container_subsys *ss, struct container *cont,
+ struct task_struct *task)
+LL=container_mutex
+
+Called prior to moving a task into a container; if the subsystem
+returns an error, this will abort the attach operation. If a NULL
+task is passed, then a successful result indicates that *any*
+unspecified task can be moved into the container. Note that this isn't
+called on a fork. If this method returns 0 (success) then this should
+remain valid while the caller holds container_mutex.
+
+void attach(struct container_subsys *ss, struct container *cont,
+ struct container *old_cont, struct task_struct *task)
+LL=container_mutex
+
+
+Called after the task has been attached to the container, to allow any
+post-attachment activity that requires memory allocations or blocking.
+
+void fork(struct container_subsy *ss, struct task_struct *task)
+LL=callback_mutex, maybe read_lock(tasklist_lock)
+
+Called when a task is forked into a container. Also called during
+registration for all existing tasks.
+
+void exit(struct container_subsys *ss, struct task_struct *task)
+LL=callback_mutex
+
+Called during task exit
+
+int populate(struct container_subsys *ss, struct container *cont)
+LL=none
+
+Called after creation of a container to allow a subsystem to populate
+the container directory with file entries. The subsystem should make
+calls to container_add_file() with objects of type cftype (see
+include/linux/container.h for details). Note that although this
+method can return an error code, the error code is currently not
+always handled well.
+
+void post_clone(struct container_subsys *ss, struct container *cont)
+
+Called at the end of container_clone() to do any paramater
+initialization which might be required before a task could attach. For
+example in cpusets, no task may attach before 'cpus' and 'mems' are set
+up.
+
+void bind(struct container_subsys *ss, struct container *root)
+LL=callback_mutex
+
+Called when a container subsystem is rebound to a different hierarchy
+and root container. Currently this will only involve movement between
+the default hierarchy (which never has sub-containers) and a hierarchy
+that is being created/destroyed (and hence has no sub-containers).
+
+4. Questions
+============
+
+Q: what's up with this '/bin/echo' ?
+A: bash's builtin 'echo' command does not check calls to write() against
+ errors. If you use it in the container file system, you won't be
+ able to tell whether a command succeeded or failed.
+
+Q: When I attach processes, only the first of the line gets really attached !
+A: We can only return one error code per call to write(). So you should also
+ put only ONE pid.
+
diff -Nurb linux-2.6.22-570/Documentation/cpuidle/core.txt linux-2.6.22-try2/Documentation/cpuidle/core.txt
--- linux-2.6.22-570/Documentation/cpuidle/core.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/cpuidle/core.txt 2007-12-19 15:29:19.000000000 -0500
@@ -0,0 +1,17 @@
+
+ Supporting multiple CPU idle levels in kernel
+
+ cpuidle
+
+General Information:
+
+Various CPUs today support multiple idle levels that are differentiated
+by varying exit latencies and power consumption during idle.
+cpuidle is a generic in-kernel infrastructure that separates
+idle policy (governor) from idle mechanism (driver) and provides a
+standardized infrastructure to support independent development of
+governors and drivers.
+
+cpuidle resides under /drivers/cpuidle.
+
+
diff -Nurb linux-2.6.22-570/Documentation/cpuidle/driver.txt linux-2.6.22-try2/Documentation/cpuidle/driver.txt
--- linux-2.6.22-570/Documentation/cpuidle/driver.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/cpuidle/driver.txt 2007-12-19 15:29:19.000000000 -0500
@@ -0,0 +1,24 @@
+
+
+ Supporting multiple CPU idle levels in kernel
+
+ cpuidle drivers
+
+
+
+
+cpuidle driver supports capability detection for a particular system. The
+init and exit routines will be called for each online CPU, with a percpu
+cpuidle_driver object and driver should fill in cpuidle_states inside
+cpuidle_driver depending on the CPU capability.
+
+Driver can handle dynamic state changes (like battery<->AC), by calling
+force_redetect interface.
+
+It is possible to have more than one driver registered at the same time and
+user can switch between drivers using /sysfs interface.
+
+Interfaces:
+int cpuidle_register_driver(struct cpuidle_driver *drv);
+void cpuidle_unregister_driver(struct cpuidle_driver *drv);
+int cpuidle_force_redetect(struct cpuidle_device *dev);
diff -Nurb linux-2.6.22-570/Documentation/cpuidle/governor.txt linux-2.6.22-try2/Documentation/cpuidle/governor.txt
--- linux-2.6.22-570/Documentation/cpuidle/governor.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/cpuidle/governor.txt 2007-12-19 15:29:19.000000000 -0500
@@ -0,0 +1,24 @@
+
+
+
+ Supporting multiple CPU idle levels in kernel
+
+ cpuidle governors
+
+
+
+
+cpuidle governor is policy routine that decides what idle state to enter at
+any given time. cpuidle core uses different callbacks to governor while
+handling idle entry.
+* select_state callback where governor can determine next idle state to enter
+* prepare_idle callback is called before entering an idle state
+* scan callback is called after a driver forces redetection of the states
+
+More than one governor can be registered at the same time and
+user can switch between drivers using /sysfs interface.
+
+Interfaces:
+int cpuidle_register_governor(struct cpuidle_governor *gov);
+void cpuidle_unregister_governor(struct cpuidle_governor *gov);
+
diff -Nurb linux-2.6.22-570/Documentation/cpuidle/sysfs.txt linux-2.6.22-try2/Documentation/cpuidle/sysfs.txt
--- linux-2.6.22-570/Documentation/cpuidle/sysfs.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/cpuidle/sysfs.txt 2007-12-19 15:29:19.000000000 -0500
@@ -0,0 +1,27 @@
+
+
+ Supporting multiple CPU idle levels in kernel
+
+ cpuidle sysfs
+
+System global cpuidle information are under
+/sys/devices/system/cpu/cpuidle
+
+The current interfaces in this directory has self-explanatory names:
+* available_drivers
+* available_governors
+* current_driver
+* current_governor
+
+Per logical CPU specific cpuidle information are under
+/sys/devices/system/cpu/cpuX/cpuidle
+for each online cpu X
+
+Under this percpu directory, there is a directory for each idle state supported
+by the driver, which in turn has
+* latency
+* power
+* time
+* usage
+
+
diff -Nurb linux-2.6.22-570/Documentation/cpusets.txt linux-2.6.22-try2/Documentation/cpusets.txt
--- linux-2.6.22-570/Documentation/cpusets.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/cpusets.txt 2007-12-19 15:29:24.000000000 -0500
@@ -7,6 +7,7 @@
Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
Modified by Paul Jackson
Modified by Christoph Lameter
+Modified by Paul Menage
CONTENTS:
=========
@@ -16,10 +17,9 @@
1.2 Why are cpusets needed ?
1.3 How are cpusets implemented ?
1.4 What are exclusive cpusets ?
- 1.5 What does notify_on_release do ?
- 1.6 What is memory_pressure ?
- 1.7 What is memory spread ?
- 1.8 How do I use cpusets ?
+ 1.5 What is memory_pressure ?
+ 1.6 What is memory spread ?
+ 1.7 How do I use cpusets ?
2. Usage Examples and Syntax
2.1 Basic Usage
2.2 Adding/removing cpus
@@ -43,18 +43,19 @@
hooks, beyond what is already present, required to manage dynamic
job placement on large systems.
-Each task has a pointer to a cpuset. Multiple tasks may reference
-the same cpuset. Requests by a task, using the sched_setaffinity(2)
-system call to include CPUs in its CPU affinity mask, and using the
-mbind(2) and set_mempolicy(2) system calls to include Memory Nodes
-in its memory policy, are both filtered through that tasks cpuset,
-filtering out any CPUs or Memory Nodes not in that cpuset. The
-scheduler will not schedule a task on a CPU that is not allowed in
-its cpus_allowed vector, and the kernel page allocator will not
-allocate a page on a node that is not allowed in the requesting tasks
-mems_allowed vector.
+Cpusets use the generic container subsystem described in
+Documentation/container.txt.
-User level code may create and destroy cpusets by name in the cpuset
+Requests by a task, using the sched_setaffinity(2) system call to
+include CPUs in its CPU affinity mask, and using the mbind(2) and
+set_mempolicy(2) system calls to include Memory Nodes in its memory
+policy, are both filtered through that tasks cpuset, filtering out any
+CPUs or Memory Nodes not in that cpuset. The scheduler will not
+schedule a task on a CPU that is not allowed in its cpus_allowed
+vector, and the kernel page allocator will not allocate a page on a
+node that is not allowed in the requesting tasks mems_allowed vector.
+
+User level code may create and destroy cpusets by name in the container
virtual file system, manage the attributes and permissions of these
cpusets and which CPUs and Memory Nodes are assigned to each cpuset,
specify and query to which cpuset a task is assigned, and list the
@@ -86,9 +87,6 @@
and a database), or
* NUMA systems running large HPC applications with demanding
performance characteristics.
- * Also cpu_exclusive cpusets are useful for servers running orthogonal
- workloads such as RT applications requiring low latency and HPC
- applications that are throughput sensitive
These subsets, or "soft partitions" must be able to be dynamically
adjusted, as the job mix changes, without impacting other concurrently
@@ -117,7 +115,7 @@
- Cpusets are sets of allowed CPUs and Memory Nodes, known to the
kernel.
- Each task in the system is attached to a cpuset, via a pointer
- in the task structure to a reference counted cpuset structure.
+ in the task structure to a reference counted container structure.
- Calls to sched_setaffinity are filtered to just those CPUs
allowed in that tasks cpuset.
- Calls to mbind and set_mempolicy are filtered to just
@@ -131,8 +129,6 @@
- A cpuset may be marked exclusive, which ensures that no other
cpuset (except direct ancestors and descendents) may contain
any overlapping CPUs or Memory Nodes.
- Also a cpu_exclusive cpuset would be associated with a sched
- domain.
- You can list all the tasks (by pid) attached to any cpuset.
The implementation of cpusets requires a few, simple hooks
@@ -144,23 +140,15 @@
allowed in that tasks cpuset.
- in sched.c migrate_all_tasks(), to keep migrating tasks within
the CPUs allowed by their cpuset, if possible.
- - in sched.c, a new API partition_sched_domains for handling
- sched domain changes associated with cpu_exclusive cpusets
- and related changes in both sched.c and arch/ia64/kernel/domain.c
- in the mbind and set_mempolicy system calls, to mask the requested
Memory Nodes by what's allowed in that tasks cpuset.
- in page_alloc.c, to restrict memory to allowed nodes.
- in vmscan.c, to restrict page recovery to the current cpuset.
-In addition a new file system, of type "cpuset" may be mounted,
-typically at /dev/cpuset, to enable browsing and modifying the cpusets
-presently known to the kernel. No new system calls are added for
-cpusets - all support for querying and modifying cpusets is via
-this cpuset file system.
-
-Each task under /proc has an added file named 'cpuset', displaying
-the cpuset name, as the path relative to the root of the cpuset file
-system.
+You should mount the "container" filesystem type in order to enable
+browsing and modifying the cpusets presently known to the kernel. No
+new system calls are added for cpusets - all support for querying and
+modifying cpusets is via this cpuset file system.
The /proc//status file for each task has two added lines,
displaying the tasks cpus_allowed (on which CPUs it may be scheduled)
@@ -170,16 +158,15 @@
Cpus_allowed: ffffffff,ffffffff,ffffffff,ffffffff
Mems_allowed: ffffffff,ffffffff
-Each cpuset is represented by a directory in the cpuset file system
-containing the following files describing that cpuset:
+Each cpuset is represented by a directory in the container file system
+containing (on top of the standard container files) the following
+files describing that cpuset:
- cpus: list of CPUs in that cpuset
- mems: list of Memory Nodes in that cpuset
- memory_migrate flag: if set, move pages to cpusets nodes
- cpu_exclusive flag: is cpu placement exclusive?
- mem_exclusive flag: is memory placement exclusive?
- - tasks: list of tasks (by pid) attached to that cpuset
- - notify_on_release flag: run /sbin/cpuset_release_agent on exit?
- memory_pressure: measure of how much paging pressure in cpuset
In addition, the root cpuset only has the following file:
@@ -231,15 +218,6 @@
a direct ancestor or descendent, may share any of the same CPUs or
Memory Nodes.
-A cpuset that is cpu_exclusive has a scheduler (sched) domain
-associated with it. The sched domain consists of all CPUs in the
-current cpuset that are not part of any exclusive child cpusets.
-This ensures that the scheduler load balancing code only balances
-against the CPUs that are in the sched domain as defined above and
-not all of the CPUs in the system. This removes any overhead due to
-load balancing code trying to pull tasks outside of the cpu_exclusive
-cpuset only to be prevented by the tasks' cpus_allowed mask.
-
A cpuset that is mem_exclusive restricts kernel allocations for
page, buffer and other data commonly shared by the kernel across
multiple users. All cpusets, whether mem_exclusive or not, restrict
@@ -253,21 +231,7 @@
outside even a mem_exclusive cpuset.
-1.5 What does notify_on_release do ?
-------------------------------------
-
-If the notify_on_release flag is enabled (1) in a cpuset, then whenever
-the last task in the cpuset leaves (exits or attaches to some other
-cpuset) and the last child cpuset of that cpuset is removed, then
-the kernel runs the command /sbin/cpuset_release_agent, supplying the
-pathname (relative to the mount point of the cpuset file system) of the
-abandoned cpuset. This enables automatic removal of abandoned cpusets.
-The default value of notify_on_release in the root cpuset at system
-boot is disabled (0). The default value of other cpusets at creation
-is the current value of their parents notify_on_release setting.
-
-
-1.6 What is memory_pressure ?
+1.5 What is memory_pressure ?
-----------------------------
The memory_pressure of a cpuset provides a simple per-cpuset metric
of the rate that the tasks in a cpuset are attempting to free up in
@@ -324,7 +288,7 @@
times 1000.
-1.7 What is memory spread ?
+1.6 What is memory spread ?
---------------------------
There are two boolean flag files per cpuset that control where the
kernel allocates pages for the file system buffers and related in
@@ -395,7 +359,7 @@
can become very uneven.
-1.8 How do I use cpusets ?
+1.7 How do I use cpusets ?
--------------------------
In order to minimize the impact of cpusets on critical kernel
@@ -485,7 +449,7 @@
To start a new job that is to be contained within a cpuset, the steps are:
1) mkdir /dev/cpuset
- 2) mount -t cpuset none /dev/cpuset
+ 2) mount -t container -ocpuset cpuset /dev/cpuset
3) Create the new cpuset by doing mkdir's and write's (or echo's) in
the /dev/cpuset virtual file system.
4) Start a task that will be the "founding father" of the new job.
@@ -497,7 +461,7 @@
named "Charlie", containing just CPUs 2 and 3, and Memory Node 1,
and then start a subshell 'sh' in that cpuset:
- mount -t cpuset none /dev/cpuset
+ mount -t container -ocpuset cpuset /dev/cpuset
cd /dev/cpuset
mkdir Charlie
cd Charlie
@@ -529,7 +493,7 @@
virtual filesystem.
To mount it, type:
-# mount -t cpuset none /dev/cpuset
+# mount -t container -o cpuset cpuset /dev/cpuset
Then under /dev/cpuset you can find a tree that corresponds to the
tree of the cpusets in the system. For instance, /dev/cpuset
@@ -572,6 +536,18 @@
This will fail if the cpuset is in use (has cpusets inside, or has
processes attached).
+Note that for legacy reasons, the "cpuset" filesystem exists as a
+wrapper around the container filesystem.
+
+The command
+
+mount -t cpuset X /dev/cpuset
+
+is equivalent to
+
+mount -t container -ocpuset X /dev/cpuset
+echo "/sbin/cpuset_release_agent" > /dev/cpuset/release_agent
+
2.2 Adding/removing cpus
------------------------
diff -Nurb linux-2.6.22-570/Documentation/feature-removal-schedule.txt linux-2.6.22-try2/Documentation/feature-removal-schedule.txt
--- linux-2.6.22-570/Documentation/feature-removal-schedule.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/feature-removal-schedule.txt 2007-12-19 15:29:24.000000000 -0500
@@ -162,6 +162,33 @@
---------------------------
+What: filemap_nopage, filemap_populate
+When: April 2007
+Why: These legacy interfaces no longer have any callers in the kernel and
+ any functionality provided can be provided with filemap_fault. The
+ removal schedule is short because they are a big maintainence burden
+ and have some bugs.
+Who: Nick Piggin
+
+---------------------------
+
+What: vm_ops.populate, install_page
+When: April 2007
+Why: These legacy interfaces no longer have any callers in the kernel and
+ any functionality provided can be provided with vm_ops.fault.
+Who: Nick Piggin
+
+---------------------------
+
+What: vm_ops.nopage
+When: February 2008, provided in-kernel callers have been converted
+Why: This interface is replaced by vm_ops.fault, but it has been around
+ forever, is used by a lot of drivers, and doesn't cost much to
+ maintain.
+Who: Nick Piggin
+
+---------------------------
+
What: Interrupt only SA_* flags
When: September 2007
Why: The interrupt related SA_* flags are replaced by IRQF_* to move them
@@ -280,25 +307,6 @@
---------------------------
-What: Multipath cached routing support in ipv4
-When: in 2.6.23
-Why: Code was merged, then submitter immediately disappeared leaving
- us with no maintainer and lots of bugs. The code should not have
- been merged in the first place, and many aspects of it's
- implementation are blocking more critical core networking
- development. It's marked EXPERIMENTAL and no distribution
- enables it because it cause obscure crashes due to unfixable bugs
- (interfaces don't return errors so memory allocation can't be
- handled, calling contexts of these interfaces make handling
- errors impossible too because they get called after we've
- totally commited to creating a route object, for example).
- This problem has existed for years and no forward progress
- has ever been made, and nobody steps up to try and salvage
- this code, so we're going to finally just get rid of it.
-Who: David S. Miller
-
----------------------------
-
What: read_dev_chars(), read_conf_data{,_lpm}() (s390 common I/O layer)
When: December 2007
Why: These functions are a leftover from 2.4 times. They have several
diff -Nurb linux-2.6.22-570/Documentation/filesystems/00-INDEX linux-2.6.22-try2/Documentation/filesystems/00-INDEX
--- linux-2.6.22-570/Documentation/filesystems/00-INDEX 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/filesystems/00-INDEX 2007-12-19 15:29:23.000000000 -0500
@@ -84,6 +84,8 @@
- info and mount options for the UDF filesystem.
ufs.txt
- info on the ufs filesystem.
+unionfs/
+ - info on the unionfs filesystem
vfat.txt
- info on using the VFAT filesystem used in Windows NT and Windows 95
vfs.txt
diff -Nurb linux-2.6.22-570/Documentation/filesystems/Locking linux-2.6.22-try2/Documentation/filesystems/Locking
--- linux-2.6.22-570/Documentation/filesystems/Locking 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/filesystems/Locking 2007-12-19 15:29:24.000000000 -0500
@@ -510,12 +510,14 @@
prototypes:
void (*open)(struct vm_area_struct*);
void (*close)(struct vm_area_struct*);
+ struct page *(*fault)(struct vm_area_struct*, struct fault_data *);
struct page *(*nopage)(struct vm_area_struct*, unsigned long, int *);
locking rules:
BKL mmap_sem
open: no yes
close: no yes
+fault: no yes
nopage: no yes
================================================================================
diff -Nurb linux-2.6.22-570/Documentation/filesystems/configfs/configfs.txt linux-2.6.22-try2/Documentation/filesystems/configfs/configfs.txt
--- linux-2.6.22-570/Documentation/filesystems/configfs/configfs.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/filesystems/configfs/configfs.txt 2007-12-19 15:29:23.000000000 -0500
@@ -238,6 +238,8 @@
struct config_group *(*make_group)(struct config_group *group,
const char *name);
int (*commit_item)(struct config_item *item);
+ void (*disconnect_notify)(struct config_group *group,
+ struct config_item *item);
void (*drop_item)(struct config_group *group,
struct config_item *item);
};
@@ -268,6 +270,16 @@
for the item to actually disappear from the subsystem's usage. But it
is gone from configfs.
+When drop_item() is called, the item's linkage has already been torn
+down. It no longer has a reference on its parent and has no place in
+the item hierarchy. If a client needs to do some cleanup before this
+teardown happens, the subsystem can implement the
+ct_group_ops->disconnect_notify() method. The method is called after
+configfs has removed the item from the filesystem view but before the
+item is removed from its parent group. Like drop_item(),
+disconnect_notify() is void and cannot fail. Client subsystems should
+not drop any references here, as they still must do it in drop_item().
+
A config_group cannot be removed while it still has child items. This
is implemented in the configfs rmdir(2) code. ->drop_item() will not be
called, as the item has not been dropped. rmdir(2) will fail, as the
@@ -386,6 +398,33 @@
rmdir(2). They also are not considered when rmdir(2) on the parent
group is checking for children.
+[Dependant Subsystems]
+
+Sometimes other drivers depend on particular configfs items. For
+example, ocfs2 mounts depend on a heartbeat region item. If that
+region item is removed with rmdir(2), the ocfs2 mount must BUG or go
+readonly. Not happy.
+
+configfs provides two additional API calls: configfs_depend_item() and
+configfs_undepend_item(). A client driver can call
+configfs_depend_item() on an existing item to tell configfs that it is
+depended on. configfs will then return -EBUSY from rmdir(2) for that
+item. When the item is no longer depended on, the client driver calls
+configfs_undepend_item() on it.
+
+These API cannot be called underneath any configfs callbacks, as
+they will conflict. They can block and allocate. A client driver
+probably shouldn't calling them of its own gumption. Rather it should
+be providing an API that external subsystems call.
+
+How does this work? Imagine the ocfs2 mount process. When it mounts,
+it asks for a heartbeat region item. This is done via a call into the
+heartbeat code. Inside the heartbeat code, the region item is looked
+up. Here, the heartbeat code calls configfs_depend_item(). If it
+succeeds, then heartbeat knows the region is safe to give to ocfs2.
+If it fails, it was being torn down anyway, and heartbeat can gracefully
+pass up an error.
+
[Committable Items]
NOTE: Committable items are currently unimplemented.
diff -Nurb linux-2.6.22-570/Documentation/filesystems/unionfs/00-INDEX linux-2.6.22-try2/Documentation/filesystems/unionfs/00-INDEX
--- linux-2.6.22-570/Documentation/filesystems/unionfs/00-INDEX 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/filesystems/unionfs/00-INDEX 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,10 @@
+00-INDEX
+ - this file.
+concepts.txt
+ - A brief introduction of concepts.
+issues.txt
+ - A summary of known issues with unionfs.
+rename.txt
+ - Information regarding rename operations.
+usage.txt
+ - Usage information and examples.
diff -Nurb linux-2.6.22-570/Documentation/filesystems/unionfs/concepts.txt linux-2.6.22-try2/Documentation/filesystems/unionfs/concepts.txt
--- linux-2.6.22-570/Documentation/filesystems/unionfs/concepts.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/filesystems/unionfs/concepts.txt 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,75 @@
+Unionfs 2.0 CONCEPTS:
+=====================
+
+This file describes the concepts needed by a namespace unification file
+system.
+
+Branch Priority:
+================
+
+Each branch is assigned a unique priority - starting from 0 (highest
+priority). No two branches can have the same priority.
+
+
+Branch Mode:
+============
+
+Each branch is assigned a mode - read-write or read-only. This allows
+directories on media mounted read-write to be used in a read-only manner.
+
+
+Whiteouts:
+==========
+
+A whiteout removes a file name from the namespace. Whiteouts are needed when
+one attempts to remove a file on a read-only branch.
+
+Suppose we have a two-branch union, where branch 0 is read-write and branch
+1 is read-only. And a file 'foo' on branch 1:
+
+./b0/
+./b1/
+./b1/foo
+
+The unified view would simply be:
+
+./union/
+./union/foo
+
+Since 'foo' is stored on a read-only branch, it cannot be removed. A
+whiteout is used to remove the name 'foo' from the unified namespace. Again,
+since branch 1 is read-only, the whiteout cannot be created there. So, we
+try on a higher priority (lower numerically) branch and create the whiteout
+there.
+
+./b0/
+./b0/.wh.foo
+./b1/
+./b1/foo
+
+Later, when Unionfs traverses branches (due to lookup or readdir), it
+eliminate 'foo' from the namespace (as well as the whiteout itself.)
+
+
+Duplicate Elimination:
+======================
+
+It is possible for files on different branches to have the same name.
+Unionfs then has to select which instance of the file to show to the user.
+Given the fact that each branch has a priority associated with it, the
+simplest solution is to take the instance from the highest priority
+(numerically lowest value) and "hide" the others.
+
+
+Copyup:
+=======
+
+When a change is made to the contents of a file's data or meta-data, they
+have to be stored somewhere. The best way is to create a copy of the
+original file on a branch that is writable, and then redirect the write
+though to this copy. The copy must be made on a higher priority branch so
+that lookup and readdir return this newer "version" of the file rather than
+the original (see duplicate elimination).
+
+
+For more information, see .
diff -Nurb linux-2.6.22-570/Documentation/filesystems/unionfs/issues.txt linux-2.6.22-try2/Documentation/filesystems/unionfs/issues.txt
--- linux-2.6.22-570/Documentation/filesystems/unionfs/issues.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/filesystems/unionfs/issues.txt 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,39 @@
+KNOWN Unionfs 2.0 ISSUES:
+=========================
+
+1. The NFS server returns -EACCES for read-only exports, instead of -EROFS.
+ This means we can't reliably detect a read-only NFS export.
+
+2. Modifying a Unionfs branch directly, while the union is mounted, is
+ currently unsupported, because it could cause a cache incoherency between
+ the union layer and the lower file systems (for that reason, Unionfs
+ currently prohibits using branches which overlap with each other, even
+ partially). We have tested Unionfs under such conditions, and fixed any
+ bugs we found (Unionfs comes with an extensive regression test suite).
+ However, it may still be possible that changes made to lower branches
+ directly could cause cache incoherency which, in the worst case, may case
+ an oops.
+
+ Unionfs 2.0 has a temporary workaround for this. You can force Unionfs
+ to increase the superblock generation number, and hence purge all cached
+ Unionfs objects, which would then be re-gotten from the lower branches.
+ This should ensure cache consistency. To increase the generation number,
+ executed the command:
+
+ mount -t unionfs -o remount,incgen none MOUNTPOINT
+
+ Note that the older way of incrementing the generation number using an
+ ioctl, is no longer supported in Unionfs 2.0. Ioctls in general are not
+ encouraged. Plus, an ioctl is per-file concept, whereas the generation
+ number is a per-file-system concept. Worse, such an ioctl requires an
+ open file, which then has to be invalidated by the very nature of the
+ generation number increase (read: the old generation increase ioctl was
+ pretty racy).
+
+3. Unionfs should not use lookup_one_len() on the underlying f/s as it
+ confuses NFS. Currently, unionfs_lookup() passes lookup intents to the
+ lower file-system, this eliminates part of the problem. The remaining
+ calls to lookup_one_len may need to be changed to pass an intent.
+
+
+For more information, see .
diff -Nurb linux-2.6.22-570/Documentation/filesystems/unionfs/rename.txt linux-2.6.22-try2/Documentation/filesystems/unionfs/rename.txt
--- linux-2.6.22-570/Documentation/filesystems/unionfs/rename.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/filesystems/unionfs/rename.txt 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,31 @@
+Rename is a complex beast. The following table shows which rename(2) operations
+should succeed and which should fail.
+
+o: success
+E: error (either unionfs or vfs)
+X: EXDEV
+
+none = file does not exist
+file = file is a file
+dir = file is a empty directory
+child= file is a non-empty directory
+wh = file is a directory containing only whiteouts; this makes it logically
+ empty
+
+ none file dir child wh
+file o o E E E
+dir o E o E o
+child X E X E X
+wh o E o E o
+
+
+Renaming directories:
+=====================
+
+Whenever a empty (either physically or logically) directory is being renamed,
+the following sequence of events should take place:
+
+1) Remove whiteouts from both source and destination directory
+2) Rename source to destination
+3) Make destination opaque to prevent anything under it from showing up
+
diff -Nurb linux-2.6.22-570/Documentation/filesystems/unionfs/usage.txt linux-2.6.22-try2/Documentation/filesystems/unionfs/usage.txt
--- linux-2.6.22-570/Documentation/filesystems/unionfs/usage.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/filesystems/unionfs/usage.txt 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,90 @@
+Unionfs is a stackable unification file system, which can appear to merge
+the contents of several directories (branches), while keeping their physical
+content separate. Unionfs is useful for unified source tree management,
+merged contents of split CD-ROM, merged separate software package
+directories, data grids, and more. Unionfs allows any mix of read-only and
+read-write branches, as well as insertion and deletion of branches anywhere
+in the fan-out. To maintain Unix semantics, Unionfs handles elimination of
+duplicates, partial-error conditions, and more.
+
+# mount -t unionfs -o branch-option[,union-options[,...]] none MOUNTPOINT
+
+The available branch-option for the mount command is:
+
+ dirs=branch[=ro|=rw][:...]
+
+specifies a separated list of which directories compose the union.
+Directories that come earlier in the list have a higher precedence than
+those which come later. Additionally, read-only or read-write permissions of
+the branch can be specified by appending =ro or =rw (default) to each
+directory.
+
+Syntax:
+
+ dirs=/branch1[=ro|=rw]:/branch2[=ro|=rw]:...:/branchN[=ro|=rw]
+
+Example:
+
+ dirs=/writable_branch=rw:/read-only_branch=ro
+
+
+DYNAMIC BRANCH MANAGEMENT AND REMOUNTS
+======================================
+
+You can remount a union and change its overall mode, or reconfigure the
+branches, as follows.
+
+To downgrade a union from read-write to read-only:
+
+# mount -t unionfs -o remount,ro none MOUNTPOINT
+
+To upgrade a union from read-only to read-write:
+
+# mount -t unionfs -o remount,rw none MOUNTPOINT
+
+To delete a branch /foo, regardless where it is in the current union:
+
+# mount -t unionfs -o del=/foo none MOUNTPOINT
+
+To insert (add) a branch /foo before /bar:
+
+# mount -t unionfs -o remount,add=/bar:/foo none MOUNTPOINT
+
+To insert (add) a branch /foo (with the "rw" mode flag) before /bar:
+
+# mount -t unionfs -o remount,add=/bar:/foo=rw none MOUNTPOINT
+
+To insert (add) a branch /foo (in "rw" mode) at the very beginning (i.e., a
+new highest-priority branch), you can use the above syntax, or use a short
+hand version as follows:
+
+# mount -t unionfs -o remount,add=/foo none MOUNTPOINT
+
+To append a branch to the very end (new lowest-priority branch):
+
+# mount -t unionfs -o remount,add=:/foo none MOUNTPOINT
+
+To append a branch to the very end (new lowest-priority branch), in
+read-only mode:
+
+# mount -t unionfs -o remount,add=:/foo:ro none MOUNTPOINT
+
+Finally, to change the mode of one existing branch, say /foo, from read-only
+to read-write, and change /bar from read-write to read-only:
+
+# mount -t unionfs -o remount,mode=/foo=rw,mode=/bar=ro none MOUNTPOINT
+
+
+CACHE CONSISTENCY
+=================
+
+If you modify any file on any of the lower branches directly, while there is
+a Unionfs 2.0 mounted above any of those branches, you should tell Unionfs
+to purge its caches and re-get the objects. To do that, you have to
+increment the generation number of the superblock using the following
+command:
+
+# mount -t unionfs -o remount,incgen none MOUNTPOINT
+
+
+For more information, see .
diff -Nurb linux-2.6.22-570/Documentation/firmware_class/firmware_sample_firmware_class.c linux-2.6.22-try2/Documentation/firmware_class/firmware_sample_firmware_class.c
--- linux-2.6.22-570/Documentation/firmware_class/firmware_sample_firmware_class.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/firmware_class/firmware_sample_firmware_class.c 2007-12-19 15:29:19.000000000 -0500
@@ -78,6 +78,7 @@
firmware_loading_show, firmware_loading_store);
static ssize_t firmware_data_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct class_device *class_dev = to_class_dev(kobj);
@@ -88,6 +89,7 @@
return count;
}
static ssize_t firmware_data_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
struct class_device *class_dev = to_class_dev(kobj);
diff -Nurb linux-2.6.22-570/Documentation/power/freezing-of-tasks.txt linux-2.6.22-try2/Documentation/power/freezing-of-tasks.txt
--- linux-2.6.22-570/Documentation/power/freezing-of-tasks.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/power/freezing-of-tasks.txt 2007-12-19 15:29:24.000000000 -0500
@@ -0,0 +1,160 @@
+Freezing of tasks
+ (C) 2007 Rafael J. Wysocki , GPL
+
+I. What is the freezing of tasks?
+
+The freezing of tasks is a mechanism by which user space processes and some
+kernel threads are controlled during hibernation or system-wide suspend (on some
+architectures).
+
+II. How does it work?
+
+There are four per-task flags used for that, PF_NOFREEZE, PF_FROZEN, TIF_FREEZE
+and PF_FREEZER_SKIP (the last one is auxiliary). The tasks that have
+PF_NOFREEZE unset (all user space processes and some kernel threads) are
+regarded as 'freezable' and treated in a special way before the system enters a
+suspend state as well as before a hibernation image is created (in what follows
+we only consider hibernation, but the description also applies to suspend).
+
+Namely, as the first step of the hibernation procedure the function
+freeze_processes() (defined in kernel/power/process.c) is called. It executes
+try_to_freeze_tasks() that sets TIF_FREEZE for all of the freezable tasks and
+sends a fake signal to each of them. A task that receives such a signal and has
+TIF_FREEZE set, should react to it by calling the refrigerator() function
+(defined in kernel/power/process.c), which sets the task's PF_FROZEN flag,
+changes its state to TASK_UNINTERRUPTIBLE and makes it loop until PF_FROZEN is
+cleared for it. Then, we say that the task is 'frozen' and therefore the set of
+functions handling this mechanism is called 'the freezer' (these functions are
+defined in kernel/power/process.c and include/linux/freezer.h). User space
+processes are generally frozen before kernel threads.
+
+It is not recommended to call refrigerator() directly. Instead, it is
+recommended to use the try_to_freeze() function (defined in
+include/linux/freezer.h), that checks the task's TIF_FREEZE flag and makes the
+task enter refrigerator() if the flag is set.
+
+For user space processes try_to_freeze() is called automatically from the
+signal-handling code, but the freezable kernel threads need to call it
+explicitly in suitable places. The code to do this may look like the following:
+
+ do {
+ hub_events();
+ wait_event_interruptible(khubd_wait,
+ !list_empty(&hub_event_list));
+ try_to_freeze();
+ } while (!signal_pending(current));
+
+(from drivers/usb/core/hub.c::hub_thread()).
+
+If a freezable kernel thread fails to call try_to_freeze() after the freezer has
+set TIF_FREEZE for it, the freezing of tasks will fail and the entire
+hibernation operation will be cancelled. For this reason, freezable kernel
+threads must call try_to_freeze() somewhere.
+
+After the system memory state has been restored from a hibernation image and
+devices have been reinitialized, the function thaw_processes() is called in
+order to clear the PF_FROZEN flag for each frozen task. Then, the tasks that
+have been frozen leave refrigerator() and continue running.
+
+III. Which kernel threads are freezable?
+
+Kernel threads are not freezable by default. However, a kernel thread may clear
+PF_NOFREEZE for itself by calling set_freezable() (the resetting of PF_NOFREEZE
+directly is strongly discouraged). From this point it is regarded as freezable
+and must call try_to_freeze() in a suitable place.
+
+IV. Why do we do that?
+
+Generally speaking, there is a couple of reasons to use the freezing of tasks:
+
+1. The principal reason is to prevent filesystems from being damaged after
+hibernation. At the moment we have no simple means of checkpointing
+filesystems, so if there are any modifications made to filesystem data and/or
+metadata on disks, we cannot bring them back to the state from before the
+modifications. At the same time each hibernation image contains some
+filesystem-related information that must be consistent with the state of the
+on-disk data and metadata after the system memory state has been restored from
+the image (otherwise the filesystems will be damaged in a nasty way, usually
+making them almost impossible to repair). We therefore freeze tasks that might
+cause the on-disk filesystems' data and metadata to be modified after the
+hibernation image has been created and before the system is finally powered off.
+The majority of these are user space processes, but if any of the kernel threads
+may cause something like this to happen, they have to be freezable.
+
+2. The second reason is to prevent user space processes and some kernel threads
+from interfering with the suspending and resuming of devices. A user space
+process running on a second CPU while we are suspending devices may, for
+example, be troublesome and without the freezing of tasks we would need some
+safeguards against race conditions that might occur in such a case.
+
+Although Linus Torvalds doesn't like the freezing of tasks, he said this in one
+of the discussions on LKML (http://lkml.org/lkml/2007/4/27/608):
+
+"RJW:> Why we freeze tasks at all or why we freeze kernel threads?
+
+Linus: In many ways, 'at all'.
+
+I _do_ realize the IO request queue issues, and that we cannot actually do
+s2ram with some devices in the middle of a DMA. So we want to be able to
+avoid *that*, there's no question about that. And I suspect that stopping
+user threads and then waiting for a sync is practically one of the easier
+ways to do so.
+
+So in practice, the 'at all' may become a 'why freeze kernel threads?' and
+freezing user threads I don't find really objectionable."
+
+Still, there are kernel threads that may want to be freezable. For example, if
+a kernel that belongs to a device driver accesses the device directly, it in
+principle needs to know when the device is suspended, so that it doesn't try to
+access it at that time. However, if the kernel thread is freezable, it will be
+frozen before the driver's .suspend() callback is executed and it will be
+thawed after the driver's .resume() callback has run, so it won't be accessing
+the device while it's suspended.
+
+3. Another reason for freezing tasks is to prevent user space processes from
+realizing that hibernation (or suspend) operation takes place. Ideally, user
+space processes should not notice that such a system-wide operation has occurred
+and should continue running without any problems after the restore (or resume
+from suspend). Unfortunately, in the most general case this is quite difficult
+to achieve without the freezing of tasks. Consider, for example, a process
+that depends on all CPUs being online while it's running. Since we need to
+disable nonboot CPUs during the hibernation, if this process is not frozen, it
+may notice that the number of CPUs has changed and may start to work incorrectly
+because of that.
+
+V. Are there any problems related to the freezing of tasks?
+
+Yes, there are.
+
+First of all, the freezing of kernel threads may be tricky if they depend one
+on another. For example, if kernel thread A waits for a completion (in the
+TASK_UNINTERRUPTIBLE state) that needs to be done by freezable kernel thread B
+and B is frozen in the meantime, then A will be blocked until B is thawed, which
+may be undesirable. That's why kernel threads are not freezable by default.
+
+Second, there are the following two problems related to the freezing of user
+space processes:
+1. Putting processes into an uninterruptible sleep distorts the load average.
+2. Now that we have FUSE, plus the framework for doing device drivers in
+userspace, it gets even more complicated because some userspace processes are
+now doing the sorts of things that kernel threads do
+(https://lists.linux-foundation.org/pipermail/linux-pm/2007-May/012309.html).
+
+The problem 1. seems to be fixable, although it hasn't been fixed so far. The
+other one is more serious, but it seems that we can work around it by using
+hibernation (and suspend) notifiers (in that case, though, we won't be able to
+avoid the realization by the user space processes that the hibernation is taking
+place).
+
+There are also problems that the freezing of tasks tends to expose, although
+they are not directly related to it. For example, if request_firmware() is
+called from a device driver's .resume() routine, it will timeout and eventually
+fail, because the user land process that should respond to the request is frozen
+at this point. So, seemingly, the failure is due to the freezing of tasks.
+Suppose, however, that the firmware file is located on a filesystem accessible
+only through another device that hasn't been resumed yet. In that case,
+request_firmware() will fail regardless of whether or not the freezing of tasks
+is used. Consequently, the problem is not really related to the freezing of
+tasks, since it generally exists anyway. [The solution to this particular
+problem is to keep the firmware in memory after it's loaded for the first time
+and upload if from memory to the device whenever necessary.]
diff -Nurb linux-2.6.22-570/Documentation/power/kernel_threads.txt linux-2.6.22-try2/Documentation/power/kernel_threads.txt
--- linux-2.6.22-570/Documentation/power/kernel_threads.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/power/kernel_threads.txt 1969-12-31 19:00:00.000000000 -0500
@@ -1,40 +0,0 @@
-KERNEL THREADS
-
-
-Freezer
-
-Upon entering a suspended state the system will freeze all
-tasks. This is done by delivering pseudosignals. This affects
-kernel threads, too. To successfully freeze a kernel thread
-the thread has to check for the pseudosignal and enter the
-refrigerator. Code to do this looks like this:
-
- do {
- hub_events();
- wait_event_interruptible(khubd_wait, !list_empty(&hub_event_list));
- try_to_freeze();
- } while (!signal_pending(current));
-
-from drivers/usb/core/hub.c::hub_thread()
-
-
-The Unfreezable
-
-Some kernel threads however, must not be frozen. The kernel must
-be able to finish pending IO operations and later on be able to
-write the memory image to disk. Kernel threads needed to do IO
-must stay awake. Such threads must mark themselves unfreezable
-like this:
-
- /*
- * This thread doesn't need any user-level access,
- * so get rid of all our resources.
- */
- daemonize("usb-storage");
-
- current->flags |= PF_NOFREEZE;
-
-from drivers/usb/storage/usb.c::usb_stor_control_thread()
-
-Such drivers are themselves responsible for staying quiet during
-the actual snapshotting.
diff -Nurb linux-2.6.22-570/Documentation/power/swsusp.txt linux-2.6.22-try2/Documentation/power/swsusp.txt
--- linux-2.6.22-570/Documentation/power/swsusp.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/power/swsusp.txt 2007-12-19 15:29:24.000000000 -0500
@@ -140,21 +140,11 @@
website, and not to the Linux Kernel Mailing List. We are working
toward merging suspend2 into the mainline kernel.
-Q: A kernel thread must voluntarily freeze itself (call 'refrigerator').
-I found some kernel threads that don't do it, and they don't freeze
-so the system can't sleep. Is this a known behavior?
-
-A: All such kernel threads need to be fixed, one by one. Select the
-place where the thread is safe to be frozen (no kernel semaphores
-should be held at that point and it must be safe to sleep there), and
-add:
-
- try_to_freeze();
-
-If the thread is needed for writing the image to storage, you should
-instead set the PF_NOFREEZE process flag when creating the thread (and
-be very careful).
+Q: What is the freezing of tasks and why are we using it?
+A: The freezing of tasks is a mechanism by which user space processes and some
+kernel threads are controlled during hibernation or system-wide suspend (on some
+architectures). See freezing-of-tasks.txt for details.
Q: What is the difference between "platform" and "shutdown"?
diff -Nurb linux-2.6.22-570/Documentation/scsi/scsi_fc_transport.txt linux-2.6.22-try2/Documentation/scsi/scsi_fc_transport.txt
--- linux-2.6.22-570/Documentation/scsi/scsi_fc_transport.txt 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/Documentation/scsi/scsi_fc_transport.txt 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,450 @@
+ SCSI FC Tansport
+ =============================================
+
+Date: 4/12/2007
+Kernel Revisions for features:
+ rports : <>
+ vports : 2.6.22 (? TBD)
+
+
+Introduction
+============
+This file documents the features and components of the SCSI FC Transport.
+It also provides documents the API between the transport and FC LLDDs.
+The FC transport can be found at:
+ drivers/scsi/scsi_transport_fc.c
+ include/scsi/scsi_transport_fc.h
+ include/scsi/scsi_netlink_fc.h
+
+This file is found at Documentation/scsi/scsi_fc_transport.txt
+
+
+FC Remote Ports (rports)
+========================================================================
+<< To Be Supplied >>
+
+
+FC Virtual Ports (vports)
+========================================================================
+
+Overview:
+-------------------------------
+
+ New FC standards have defined mechanisms which allows for a single physical
+ port to appear on as multiple communication ports. Using the N_Port Id
+ Virtualization (NPIV) mechanism, a point-to-point connection to a Fabric
+ can be assigned more than 1 N_Port_ID. Each N_Port_ID appears as a
+ separate port to other endpoints on the fabric, even though it shares one
+ physical link to the switch for communication. Each N_Port_ID can have a
+ unique view of the fabric based on fabric zoning and array lun-masking
+ (just like a normal non-NPIV adapter). Using the Virtual Fabric (VF)
+ mechanism, adding a fabric header to each frame allows the port to
+ interact with the Fabric Port to join multiple fabrics. The port will
+ obtain an N_Port_ID on each fabric it joins. Each fabric will have its
+ own unique view of endpoints and configuration parameters. NPIV may be
+ used together with VF so that the port can obtain multiple N_Port_IDs
+ on each virtual fabric.
+
+ The FC transport is now recognizing a new object - a vport. A vport is
+ an entity that has a world-wide unique World Wide Port Name (wwpn) and
+ World Wide Node Name (wwnn). The transport also allows for the FC4's to
+ be specified for the vport, with FCP_Initiator being the primary role
+ expected. Once instantiated by one of the above methods, it will have a
+ distinct N_Port_ID and view of fabric endpoints and storage entities.
+ The fc_host associated with the physical adapter will export the ability
+ to create vports. The transport will create the vport object within the
+ Linux device tree, and instruct the fc_host's driver to instantiate the
+ virtual port. Typically, the driver will create a new scsi_host instance
+ on the vport, resulting in a unique namespace for the vport.
+ Thus, whether a FC port is based on a physical port or on a virtual port,
+ each will appear as a unique scsi_host with its own target and lun space.
+
+ Note: At this time, the transport is written to create only NPIV-based
+ vports. However, consideration was given to VF-based vports and it
+ should be a minor change to add support if needed. The remaining
+ discussion will concentrate on NPIV.
+
+ Note: World Wide Name assignment (and uniqueness guarantees) are left
+ up to an administrative entity controling the vport. For example,
+ if vports are to be associated with virtual machines, a XEN mgmt
+ utility would be responsible for creating wwpn/wwnn's for the vport,
+ using it's own naming authority and OUI. (Note: it already does this
+ for virtual MAC addresses).
+
+
+Device Trees and Vport Objects:
+-------------------------------
+
+ Today, the device tree typically contains the scsi_host object,
+ with rports and scsi target objects underneath it. Currently the FC
+ transport creates the vport object and places it under the scsi_host
+ object corresponding to the physical adapter. The LLDD will allocate
+ a new scsi_host for the vport and link it's object under the vport.
+ The remainder of the tree under the vports scsi_host is the same
+ as the non-NPIV case. The transport is written currently to easily
+ allow the parent of the vport to be something other than the scsi_host.
+ This could be used in the future to link the object onto a vm-specific
+ device tree. If the vport's parent is not the physical port's scsi_host,
+ a symbolic link to the vport object will be placed in the physical
+ port's scsi_host.
+
+ Here's what to expect in the device tree :
+ The typical Physical Port's Scsi_Host:
+ /sys/devices/.../host17/
+ and it has the typical decendent tree:
+ /sys/devices/.../host17/rport-17:0-0/target17:0:0/17:0:0:0:
+ and then the vport is created on the Physical Port:
+ /sys/devices/.../host17/vport-17:0-0
+ and the vport's Scsi_Host is then created:
+ /sys/devices/.../host17/vport-17:0-0/host18
+ and then the rest of the tree progresses, such as:
+ /sys/devices/.../host17/vport-17:0-0/host18/rport-18:0-0/target18:0:0/18:0:0:0:
+
+ Here's what to expect in the sysfs tree :
+ scsi_hosts:
+ /sys/class/scsi_host/host17 physical port's scsi_host
+ /sys/class/scsi_host/host18 vport's scsi_host
+ fc_hosts:
+ /sys/class/fc_host/host17 physical port's fc_host
+ /sys/class/fc_host/host18 vport's fc_host
+ fc_vports:
+ /sys/class/fc_vports/vport-17:0-0 the vport's fc_vport
+ fc_rports:
+ /sys/class/fc_remote_ports/rport-17:0-0 rport on the physical port
+ /sys/class/fc_remote_ports/rport-18:0-0 rport on the vport
+
+
+Vport Attributes:
+-------------------------------
+
+ The new fc_vport class object has the following attributes
+
+ node_name: Read_Only
+ The WWNN of the vport
+
+ port_name: Read_Only
+ The WWPN of the vport
+
+ roles: Read_Only
+ Indicates the FC4 roles enabled on the vport.
+
+ symbolic_name: Read_Write
+ A string, appended to the driver's symbolic port name string, which
+ is registered with the switch to identify the vport. For example,
+ a hypervisor could set this string to "Xen Domain 2 VM 5 Vport 2",
+ and this set of identifiers can be seen on switch management screens
+ to identify the port.
+
+ vport_delete: Write_Only
+ When written with a "1", will tear down the vport.
+
+ vport_disable: Write_Only
+ When written with a "1", will transition the vport to a disabled.
+ state. The vport will still be instantiated with the Linux kernel,
+ but it will not be active on the FC link.
+ When written with a "0", will enable the vport.
+
+ vport_last_state: Read_Only
+ Indicates the previous state of the vport. See the section below on
+ "Vport States".
+
+ vport_state: Read_Only
+ Indicates the state of the vport. See the section below on
+ "Vport States".
+
+ vport_type: Read_Only
+ Reflects the FC mechanism used to create the virtual port.
+ Only NPIV is supported currently.
+
+
+ For the fc_host class object, the following attributes are added for vports:
+
+ max_npiv_vports: Read_Only
+ Indicates the maximum number of NPIV-based vports that the
+ driver/adapter can support on the fc_host.
+
+ npiv_vports_inuse: Read_Only
+ Indicates how many NPIV-based vports have been instantiated on the
+ fc_host.
+
+ vport_create: Write_Only
+ A "simple" create interface to instantiate a vport on an fc_host.
+ A ":" string is written to the attribute. The transport
+ then instantiates the vport object and calls the LLDD to create the
+ vport with the role of FCP_Initiator. Each WWN is specified as 16
+ hex characters and may *not* contain any prefixes (e.g. 0x, x, etc).
+
+ vport_delete: Write_Only
+ A "simple" delete interface to teardown a vport. A ":"
+ string is written to the attribute. The transport will locate the
+ vport on the fc_host with the same WWNs and tear it down. Each WWN
+ is specified as 16 hex characters and may *not* contain any prefixes
+ (e.g. 0x, x, etc).
+
+
+Vport States:
+-------------------------------
+
+ Vport instantiation consists of two parts:
+ - Creation with the kernel and LLDD. This means all transport and
+ driver data structures are built up, and device objects created.
+ This is equivalent to a driver "attach" on an adapter, which is
+ independent of the adapter's link state.
+ - Instantiation of the vport on the FC link via ELS traffic, etc.
+ This is equivalent to a "link up" and successfull link initialization.
+ Futher information can be found in the interfaces section below for
+ Vport Creation.
+
+ Once a vport has been instantiated with the kernel/LLDD, a vport state
+ can be reported via the sysfs attribute. The following states exist:
+
+ FC_VPORT_UNKNOWN - Unknown
+ An temporary state, typically set only while the vport is being
+ instantiated with the kernel and LLDD.
+
+ FC_VPORT_ACTIVE - Active
+ The vport has been successfully been created on the FC link.
+ It is fully functional.
+
+ FC_VPORT_DISABLED - Disabled
+ The vport instantiated, but "disabled". The vport is not instantiated
+ on the FC link. This is equivalent to a physical port with the
+ link "down".
+
+ FC_VPORT_LINKDOWN - Linkdown
+ The vport is not operational as the physical link is not operational.
+
+ FC_VPORT_INITIALIZING - Initializing
+ The vport is in the process of instantiating on the FC link.
+ The LLDD will set this state just prior to starting the ELS traffic
+ to create the vport. This state will persist until the vport is
+ successfully created (state becomes FC_VPORT_ACTIVE) or it fails
+ (state is one of the values below). As this state is transitory,
+ it will not be preserved in the "vport_last_state".
+
+ FC_VPORT_NO_FABRIC_SUPP - No Fabric Support
+ The vport is not operational. One of the following conditions were
+ encountered:
+ - The FC topology is not Point-to-Point
+ - The FC port is not connected to an F_Port
+ - The F_Port has indicated that NPIV is not supported.
+
+ FC_VPORT_NO_FABRIC_RSCS - No Fabric Resources
+ The vport is not operational. The Fabric failed FDISC with a status
+ indicating that it does not have sufficient resources to complete
+ the operation.
+
+ FC_VPORT_FABRIC_LOGOUT - Fabric Logout
+ The vport is not operational. The Fabric has LOGO'd the N_Port_ID
+ associated with the vport.
+
+ FC_VPORT_FABRIC_REJ_WWN - Fabric Rejected WWN
+ The vport is not operational. The Fabric failed FDISC with a status
+ indicating that the WWN's are not valid.
+
+ FC_VPORT_FAILED - VPort Failed
+ The vport is not operational. This is a catchall for all other
+ error conditions.
+
+
+ The following state table indicates the different state transitions:
+
+ State Event New State
+ --------------------------------------------------------------------
+ n/a Initialization Unknown
+ Unknown: Link Down Linkdown
+ Link Up & Loop No Fabric Support
+ Link Up & no Fabric No Fabric Support
+ Link Up & FLOGI response No Fabric Support
+ indicates no NPIV support
+ Link Up & FDISC being sent Initializing
+ Disable request Disable
+ Linkdown: Link Up Unknown
+ Initializing: FDISC ACC Active
+ FDISC LS_RJT w/ no resources No Fabric Resources
+ FDISC LS_RJT w/ invalid Fabric Rejected WWN
+ pname or invalid nport_id
+ FDISC LS_RJT failed for Vport Failed
+ other reasons
+ Link Down Linkdown
+ Disable request Disable
+ Disable: Enable request Unknown
+ Active: LOGO received from fabric Fabric Logout
+ Link Down Linkdown
+ Disable request Disable
+ Fabric Logout: Link still up Unknown
+
+ The following 4 error states all have the same transitions:
+ No Fabric Support:
+ No Fabric Resources:
+ Fabric Rejected WWN:
+ Vport Failed:
+ Disable request Disable
+ Link goes down Linkdown
+
+
+Transport <-> LLDD Interfaces :
+-------------------------------
+
+Vport support by LLDD:
+
+ The LLDD indicates support for vports by supplying a vport_create()
+ function in the transport template. The presense of this function will
+ cause the creation of the new attributes on the fc_host. As part of
+ the physical port completing its initialization relative to the
+ transport, it should set the max_npiv_vports attribute to indicate the
+ maximum number of vports the driver and/or adapter supports.
+
+
+Vport Creation:
+
+ The LLDD vport_create() syntax is:
+
+ int vport_create(struct fc_vport *vport, bool disable)
+
+ where:
+ vport: Is the newly allocated vport object
+ disable: If "true", the vport is to be created in a disabled stated.
+ If "false", the vport is to be enabled upon creation.
+
+ When a request is made to create a new vport (via sgio/netlink, or the
+ vport_create fc_host attribute), the transport will validate that the LLDD
+ can support another vport (e.g. max_npiv_vports > npiv_vports_inuse).
+ If not, the create request will be failed. If space remains, the transport
+ will increment the vport count, create the vport object, and then call the
+ LLDD's vport_create() function with the newly allocated vport object.
+
+ As mentioned above, vport creation is divided into two parts:
+ - Creation with the kernel and LLDD. This means all transport and
+ driver data structures are built up, and device objects created.
+ This is equivalent to a driver "attach" on an adapter, which is
+ independent of the adapter's link state.
+ - Instantiation of the vport on the FC link via ELS traffic, etc.
+ This is equivalent to a "link up" and successfull link initialization.
+
+ The LLDD's vport_create() function will not synchronously wait for both
+ parts to be fully completed before returning. It must validate that the
+ infrastructure exists to support NPIV, and complete the first part of
+ vport creation (data structure build up) before returning. We do not
+ hinge vport_create() on the link-side operation mainly because:
+ - The link may be down. It is not a failure if it is. It simply
+ means the vport is in an inoperable state until the link comes up.
+ This is consistent with the link bouncing post vport creation.
+ - The vport may be created in a disabled state.
+ - This is consistent with a model where: the vport equates to a
+ FC adapter. The vport_create is synonymous with driver attachment
+ to the adapter, which is independent of link state.
+
+ Note: special error codes have been defined to delineate infrastructure
+ failure cases for quicker resolution.
+
+ The expected behavior for the LLDD's vport_create() function is:
+ - Validate Infrastructure:
+ - If the driver or adapter cannot support another vport, whether
+ due to improper firmware, (a lie about) max_npiv, or a lack of
+ some other resource - return VPCERR_UNSUPPORTED.
+ - If the driver validates the WWN's against those already active on
+ the adapter and detects an overlap - return VPCERR_BAD_WWN.
+ - If the driver detects the topology is loop, non-fabric, or the
+ FLOGI did not support NPIV - return VPCERR_NO_FABRIC_SUPP.
+ - Allocate data structures. If errors are encountered, such as out
+ of memory conditions, return the respective negative Exxx error code.
+ - If the role is FCP Initiator, the LLDD is to :
+ - Call scsi_host_alloc() to allocate a scsi_host for the vport.
+ - Call scsi_add_host(new_shost, &vport->dev) to start the scsi_host
+ and bind it as a child of the vport device.
+ - Initializes the fc_host attribute values.
+ - Kick of further vport state transitions based on the disable flag and
+ link state - and return success (zero).
+
+ LLDD Implementers Notes:
+ - It is suggested that there be a different fc_function_templates for
+ the physical port and the virtual port. The physical port's template
+ would have the vport_create, vport_delete, and vport_disable functions,
+ while the vports would not.
+ - It is suggested that there be different scsi_host_templates
+ for the physical port and virtual port. Likely, there are driver
+ attributes, embedded into the scsi_host_template, that are applicable
+ for the physical port only (link speed, topology setting, etc). This
+ ensures that the attributes are applicable to the respective scsi_host.
+
+
+Vport Disable/Enable:
+
+ The LLDD vport_disable() syntax is:
+
+ int vport_disable(struct fc_vport *vport, bool disable)
+
+ where:
+ vport: Is vport to to be enabled or disabled
+ disable: If "true", the vport is to be disabled.
+ If "false", the vport is to be enabled.
+
+ When a request is made to change the disabled state on a vport, the
+ transport will validate the request against the existing vport state.
+ If the request is to disable and the vport is already disabled, the
+ request will fail. Similarly, if the request is to enable, and the
+ vport is not in a disabled state, the request will fail. If the request
+ is valid for the vport state, the transport will call the LLDD to
+ change the vport's state.
+
+ Within the LLDD, if a vport is disabled, it remains instantiated with
+ the kernel and LLDD, but it is not active or visible on the FC link in
+ any way. (see Vport Creation and the 2 part instantiation discussion).
+ The vport will remain in this state until it is deleted or re-enabled.
+ When enabling a vport, the LLDD reinstantiates the vport on the FC
+ link - essentially restarting the LLDD statemachine (see Vport States
+ above).
+
+
+Vport Deletion:
+
+ The LLDD vport_delete() syntax is:
+
+ int vport_delete(struct fc_vport *vport)
+
+ where:
+ vport: Is vport to delete
+
+ When a request is made to delete a vport (via sgio/netlink, or via the
+ fc_host or fc_vport vport_delete attributes), the transport will call
+ the LLDD to terminate the vport on the FC link, and teardown all other
+ datastructures and references. If the LLDD completes successfully,
+ the transport will teardown the vport objects and complete the vport
+ removal. If the LLDD delete request fails, the vport object will remain,
+ but will be in an indeterminate state.
+
+ Within the LLDD, the normal code paths for a scsi_host teardown should
+ be followed. E.g. If the vport has a FCP Initiator role, the LLDD
+ will call fc_remove_host() for the vports scsi_host, followed by
+ scsi_remove_host() and scsi_host_put() for the vports scsi_host.
+
+
+Other:
+ fc_host port_type attribute:
+ There is a new fc_host port_type value - FC_PORTTYPE_NPIV. This value
+ must be set on all vport-based fc_hosts. Normally, on a physical port,
+ the port_type attribute would be set to NPORT, NLPORT, etc based on the
+ topology type and existence of the fabric. As this is not applicable to
+ a vport, it makes more sense to report the FC mechanism used to create
+ the vport.
+
+ Driver unload:
+ FC drivers are required to call fc_remove_host() prior to calling
+ scsi_remove_host(). This allows the fc_host to tear down all remote
+ ports prior the scsi_host being torn down. The fc_remove_host() call
+ was updated to remove all vports for the fc_host as well.
+
+
+Credits
+=======
+The following people have contributed to this document:
+
+
+
+
+
+
+James Smart
+james.smart@emulex.com
+
diff -Nurb linux-2.6.22-570/Documentation/sysctl/kernel.txt linux-2.6.22-try2/Documentation/sysctl/kernel.txt
--- linux-2.6.22-570/Documentation/sysctl/kernel.txt 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/Documentation/sysctl/kernel.txt 2007-12-19 15:29:23.000000000 -0500
@@ -29,6 +29,7 @@
- java-interpreter [ binfmt_java, obsolete ]
- kstack_depth_to_print [ X86 only ]
- l2cr [ PPC only ]
+- mmap_min_addr
- modprobe ==> Documentation/kmod.txt
- msgmax
- msgmnb
@@ -178,6 +179,19 @@
==============================================================
+mmap_min_addr
+
+This file indicates the amount of address space which a user process will be
+restricted from mmaping. Since kernel null dereference bugs could
+accidentally operate based on the information in the first couple of pages of
+memory userspace processes should not be allowed to write to them. By default
+this value is set to 0 and no protections will be enforced by the security
+module. Setting this value to something like 64k will allow the vast majority
+of applications to work correctly and provide defense in depth against future
+potential kernel bugs.
+
+==============================================================
+
osrelease, ostype & version:
# cat osrelease
diff -Nurb linux-2.6.22-570/MAINTAINERS linux-2.6.22-try2/MAINTAINERS
--- linux-2.6.22-570/MAINTAINERS 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/MAINTAINERS 2007-12-19 15:29:23.000000000 -0500
@@ -232,15 +232,15 @@
S: Supported
ACPI BATTERY DRIVERS
-P: Vladimir P. Lebedev
-M: vladimir.p.lebedev@intel.com
+P: Alexey Starikovskiy
+M: astarikovskiy@suse.de
L: linux-acpi@vger.kernel.org
W: http://acpi.sourceforge.net/
S: Supported
ACPI EC DRIVER
P: Alexey Starikovskiy
-M: alexey.y.starikovskiy@linux.intel.com
+M: astarikovskiy@suse.de
L: linux-acpi@vger.kernel.org
W: http://acpi.sourceforge.net/
S: Supported
@@ -2127,6 +2127,15 @@
L: kexec@lists.infradead.org
S: Maintained
+KGDB
+P: Jason Wessel
+M: jason.wessel@windriver.com
+P: Amit S. Kale
+M: amitkale@linsyssoft.com
+W: http://sourceforge.net/projects/kgdb
+L: kgdb-bugreport@lists.sourceforge.net
+S: Maintained
+
KPROBES
P: Prasanna S Panchamukhi
M: prasanna@in.ibm.com
@@ -3593,6 +3602,15 @@
W: http://www.kernel.dk
S: Maintained
+UNIONFS
+P: Erez Zadok
+M: ezk@cs.sunysb.edu
+P: Josef "Jeff" Sipek
+M: jsipek@cs.sunysb.edu
+L: unionfs@filesystems.org
+W: http://unionfs.filesystems.org
+S: Maintained
+
USB ACM DRIVER
P: Oliver Neukum
M: oliver@neukum.name
diff -Nurb linux-2.6.22-570/Makefile linux-2.6.22-try2/Makefile
--- linux-2.6.22-570/Makefile 2007-12-12 18:08:43.000000000 -0500
+++ linux-2.6.22-try2/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -496,6 +496,11 @@
CFLAGS += -fomit-frame-pointer
endif
+ifdef CONFIG_UNWIND_INFO
+CFLAGS += -fasynchronous-unwind-tables
+LDFLAGS_vmlinux += --eh-frame-hdr
+endif
+
ifdef CONFIG_DEBUG_INFO
CFLAGS += -g
endif
diff -Nurb linux-2.6.22-570/arch/arm/Kconfig linux-2.6.22-try2/arch/arm/Kconfig
--- linux-2.6.22-570/arch/arm/Kconfig 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/Kconfig 2007-12-19 15:29:23.000000000 -0500
@@ -1034,6 +1034,8 @@
source "drivers/rtc/Kconfig"
+source "drivers/dma/Kconfig"
+
endmenu
source "fs/Kconfig"
diff -Nurb linux-2.6.22-570/arch/arm/boot/.gitignore.rej linux-2.6.22-try2/arch/arm/boot/.gitignore.rej
--- linux-2.6.22-570/arch/arm/boot/.gitignore.rej 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/boot/.gitignore.rej 2007-12-19 15:28:52.000000000 -0500
@@ -0,0 +1,10 @@
+***************
+*** 1,2 ****
+ Image
+ zImage
+--- 1,5 ----
+ Image
+ zImage
++ xipImage
++ bootpImage
++ uImage
Files linux-2.6.22-570/arch/arm/boot/compressed/.head.S.rej.swp and linux-2.6.22-try2/arch/arm/boot/compressed/.head.S.rej.swp differ
diff -Nurb linux-2.6.22-570/arch/arm/kernel/Makefile linux-2.6.22-try2/arch/arm/kernel/Makefile
--- linux-2.6.22-570/arch/arm/kernel/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/kernel/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -20,6 +20,7 @@
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
+obj-$(CONFIG_KGDB) += kgdb.o kgdb-jmp.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
diff -Nurb linux-2.6.22-570/arch/arm/kernel/kgdb-jmp.S linux-2.6.22-try2/arch/arm/kernel/kgdb-jmp.S
--- linux-2.6.22-570/arch/arm/kernel/kgdb-jmp.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/kernel/kgdb-jmp.S 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,32 @@
+/*
+ * arch/arm/kernel/kgdb-jmp.S
+ *
+ * Trivial setjmp and longjmp procedures to support bus error recovery
+ * which may occur during kgdb memory read/write operations.
+ *
+ * Author: MontaVista Software, Inc.
+ * source@mvista.com
+ *
+ * 2002-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program as licensed
+ * "as is" without any warranty of any kind, whether express or implied.
+ */
+#include
+
+ENTRY (kgdb_fault_setjmp)
+ /* Save registers */
+ stmia r0, {r0-r14}
+ str lr,[r0, #60]
+ mrs r1,cpsr
+ str r1,[r0,#64]
+ ldr r1,[r0,#4]
+ mov r0, #0
+ mov pc,lr
+
+ENTRY (kgdb_fault_longjmp)
+ /* Restore registers */
+ mov r1,#1
+ str r1,[r0]
+ ldr r1,[r0, #64]
+ msr spsr,r1
+ ldmia r0,{r0-pc}^
diff -Nurb linux-2.6.22-570/arch/arm/kernel/kgdb.c linux-2.6.22-try2/arch/arm/kernel/kgdb.c
--- linux-2.6.22-570/arch/arm/kernel/kgdb.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/kernel/kgdb.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,202 @@
+/*
+ * arch/arm/kernel/kgdb.c
+ *
+ * ARM KGDB support
+ *
+ * Copyright (c) 2002-2004 MontaVista Software, Inc
+ *
+ * Authors: George Davis
+ * Deepak Saxena
+ */
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/* Make a local copy of the registers passed into the handler (bletch) */
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+ int regno;
+
+ /* Initialize all to zero (??) */
+ for (regno = 0; regno < GDB_MAX_REGS; regno++)
+ gdb_regs[regno] = 0;
+
+ gdb_regs[_R0] = kernel_regs->ARM_r0;
+ gdb_regs[_R1] = kernel_regs->ARM_r1;
+ gdb_regs[_R2] = kernel_regs->ARM_r2;
+ gdb_regs[_R3] = kernel_regs->ARM_r3;
+ gdb_regs[_R4] = kernel_regs->ARM_r4;
+ gdb_regs[_R5] = kernel_regs->ARM_r5;
+ gdb_regs[_R6] = kernel_regs->ARM_r6;
+ gdb_regs[_R7] = kernel_regs->ARM_r7;
+ gdb_regs[_R8] = kernel_regs->ARM_r8;
+ gdb_regs[_R9] = kernel_regs->ARM_r9;
+ gdb_regs[_R10] = kernel_regs->ARM_r10;
+ gdb_regs[_FP] = kernel_regs->ARM_fp;
+ gdb_regs[_IP] = kernel_regs->ARM_ip;
+ gdb_regs[_SP] = kernel_regs->ARM_sp;
+ gdb_regs[_LR] = kernel_regs->ARM_lr;
+ gdb_regs[_PC] = kernel_regs->ARM_pc;
+ gdb_regs[_CPSR] = kernel_regs->ARM_cpsr;
+}
+
+/* Copy local gdb registers back to kgdb regs, for later copy to kernel */
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+ kernel_regs->ARM_r0 = gdb_regs[_R0];
+ kernel_regs->ARM_r1 = gdb_regs[_R1];
+ kernel_regs->ARM_r2 = gdb_regs[_R2];
+ kernel_regs->ARM_r3 = gdb_regs[_R3];
+ kernel_regs->ARM_r4 = gdb_regs[_R4];
+ kernel_regs->ARM_r5 = gdb_regs[_R5];
+ kernel_regs->ARM_r6 = gdb_regs[_R6];
+ kernel_regs->ARM_r7 = gdb_regs[_R7];
+ kernel_regs->ARM_r8 = gdb_regs[_R8];
+ kernel_regs->ARM_r9 = gdb_regs[_R9];
+ kernel_regs->ARM_r10 = gdb_regs[_R10];
+ kernel_regs->ARM_fp = gdb_regs[_FP];
+ kernel_regs->ARM_ip = gdb_regs[_IP];
+ kernel_regs->ARM_sp = gdb_regs[_SP];
+ kernel_regs->ARM_lr = gdb_regs[_LR];
+ kernel_regs->ARM_pc = gdb_regs[_PC];
+ kernel_regs->ARM_cpsr = gdb_regs[_CPSR];
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs,
+ struct task_struct *task)
+{
+ int regno;
+ struct pt_regs *thread_regs;
+
+ /* Just making sure... */
+ if (task == NULL)
+ return;
+
+ /* Initialize to zero */
+ for (regno = 0; regno < GDB_MAX_REGS; regno++)
+ gdb_regs[regno] = 0;
+
+ /* Otherwise, we have only some registers from switch_to() */
+ thread_regs = task_pt_regs(task);
+ gdb_regs[_R0] = thread_regs->ARM_r0; /* Not really valid? */
+ gdb_regs[_R1] = thread_regs->ARM_r1; /* " " */
+ gdb_regs[_R2] = thread_regs->ARM_r2; /* " " */
+ gdb_regs[_R3] = thread_regs->ARM_r3; /* " " */
+ gdb_regs[_R4] = thread_regs->ARM_r4;
+ gdb_regs[_R5] = thread_regs->ARM_r5;
+ gdb_regs[_R6] = thread_regs->ARM_r6;
+ gdb_regs[_R7] = thread_regs->ARM_r7;
+ gdb_regs[_R8] = thread_regs->ARM_r8;
+ gdb_regs[_R9] = thread_regs->ARM_r9;
+ gdb_regs[_R10] = thread_regs->ARM_r10;
+ gdb_regs[_FP] = thread_regs->ARM_fp;
+ gdb_regs[_IP] = thread_regs->ARM_ip;
+ gdb_regs[_SP] = thread_regs->ARM_sp;
+ gdb_regs[_LR] = thread_regs->ARM_lr;
+ gdb_regs[_PC] = thread_regs->ARM_pc;
+ gdb_regs[_CPSR] = thread_regs->ARM_cpsr;
+}
+
+static int compiled_break;
+
+int kgdb_arch_handle_exception(int exception_vector, int signo,
+ int err_code, char *remcom_in_buffer,
+ char *remcom_out_buffer,
+ struct pt_regs *linux_regs)
+{
+ long addr;
+ char *ptr;
+
+ switch (remcom_in_buffer[0]) {
+ case 'D':
+ case 'k':
+ case 'c':
+ kgdb_contthread = NULL;
+
+ /*
+ * Try to read optional parameter, pc unchanged if no parm.
+ * If this was a compiled breakpoint, we need to move
+ * to the next instruction or we will just breakpoint
+ * over and over again.
+ */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &addr)) {
+ linux_regs->ARM_pc = addr;
+ } else if (compiled_break == 1) {
+ linux_regs->ARM_pc += 4;
+ }
+
+ compiled_break = 0;
+
+ return 0;
+ }
+
+ return -1;
+}
+
+static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+ kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+ return 0;
+}
+
+static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+ compiled_break = 1;
+ kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+ return 0;
+}
+
+static struct undef_hook kgdb_brkpt_hook = {
+ .instr_mask = 0xffffffff,
+ .instr_val = KGDB_BREAKINST,
+ .fn = kgdb_brk_fn
+};
+
+static struct undef_hook kgdb_compiled_brkpt_hook = {
+ .instr_mask = 0xffffffff,
+ .instr_val = KGDB_COMPILED_BREAK,
+ .fn = kgdb_compiled_brk_fn
+};
+
+/*
+ * Register our undef instruction hooks with ARM undef core.
+ * We regsiter a hook specifically looking for the KGB break inst
+ * and we handle the normal undef case within the do_undefinstr
+ * handler.
+ */
+int kgdb_arch_init(void)
+{
+ register_undef_hook(&kgdb_brkpt_hook);
+ register_undef_hook(&kgdb_compiled_brkpt_hook);
+
+ return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifndef __ARMEB__
+ .gdb_bpt_instr = {0xfe, 0xde, 0xff, 0xe7}
+#else
+ .gdb_bpt_instr = {0xe7, 0xff, 0xde, 0xfe}
+#endif
+};
diff -Nurb linux-2.6.22-570/arch/arm/kernel/setup.c linux-2.6.22-try2/arch/arm/kernel/setup.c
--- linux-2.6.22-570/arch/arm/kernel/setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/kernel/setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -832,6 +832,11 @@
conswitchp = &dummy_con;
#endif
#endif
+
+#if defined(CONFIG_KGDB)
+ extern void __init early_trap_init(void);
+ early_trap_init();
+#endif
}
diff -Nurb linux-2.6.22-570/arch/arm/kernel/traps.c linux-2.6.22-try2/arch/arm/kernel/traps.c
--- linux-2.6.22-570/arch/arm/kernel/traps.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/kernel/traps.c 2007-12-19 15:29:23.000000000 -0500
@@ -301,6 +301,7 @@
unsigned int instr;
struct undef_hook *hook;
siginfo_t info;
+ mm_segment_t fs;
void __user *pc;
unsigned long flags;
@@ -311,6 +312,8 @@
*/
regs->ARM_pc -= correction;
+ fs = get_fs();
+ set_fs(KERNEL_DS);
pc = (void __user *)instruction_pointer(regs);
if (processor_mode(regs) == SVC_MODE) {
@@ -320,6 +323,7 @@
} else {
get_user(instr, (u32 __user *)pc);
}
+ set_fs(fs);
spin_lock_irqsave(&undef_lock, flags);
list_for_each_entry(hook, &undef_hook, node) {
@@ -707,6 +711,13 @@
void __init trap_init(void)
{
+#if defined(CONFIG_KGDB)
+ return;
+}
+
+void __init early_trap_init(void)
+{
+#endif
unsigned long vectors = CONFIG_VECTORS_BASE;
extern char __stubs_start[], __stubs_end[];
extern char __vectors_start[], __vectors_end[];
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop13xx/setup.c linux-2.6.22-try2/arch/arm/mach-iop13xx/setup.c
--- linux-2.6.22-570/arch/arm/mach-iop13xx/setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop13xx/setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -25,6 +25,7 @@
#include
#include
#include
+#include
#define IOP13XX_UART_XTAL 33334000
#define IOP13XX_SETUP_DEBUG 0
@@ -236,19 +237,143 @@
}
#endif
+/* ADMA Channels */
+static struct resource iop13xx_adma_0_resources[] = {
+ [0] = {
+ .start = IOP13XX_ADMA_PHYS_BASE(0),
+ .end = IOP13XX_ADMA_UPPER_PA(0),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_IOP13XX_ADMA0_EOT,
+ .end = IRQ_IOP13XX_ADMA0_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_IOP13XX_ADMA0_EOC,
+ .end = IRQ_IOP13XX_ADMA0_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_IOP13XX_ADMA0_ERR,
+ .end = IRQ_IOP13XX_ADMA0_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static struct resource iop13xx_adma_1_resources[] = {
+ [0] = {
+ .start = IOP13XX_ADMA_PHYS_BASE(1),
+ .end = IOP13XX_ADMA_UPPER_PA(1),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_IOP13XX_ADMA1_EOT,
+ .end = IRQ_IOP13XX_ADMA1_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_IOP13XX_ADMA1_EOC,
+ .end = IRQ_IOP13XX_ADMA1_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_IOP13XX_ADMA1_ERR,
+ .end = IRQ_IOP13XX_ADMA1_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static struct resource iop13xx_adma_2_resources[] = {
+ [0] = {
+ .start = IOP13XX_ADMA_PHYS_BASE(2),
+ .end = IOP13XX_ADMA_UPPER_PA(2),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_IOP13XX_ADMA2_EOT,
+ .end = IRQ_IOP13XX_ADMA2_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_IOP13XX_ADMA2_EOC,
+ .end = IRQ_IOP13XX_ADMA2_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_IOP13XX_ADMA2_ERR,
+ .end = IRQ_IOP13XX_ADMA2_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static u64 iop13xx_adma_dmamask = DMA_64BIT_MASK;
+static struct iop_adma_platform_data iop13xx_adma_0_data = {
+ .hw_id = 0,
+ .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop13xx_adma_1_data = {
+ .hw_id = 1,
+ .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop13xx_adma_2_data = {
+ .hw_id = 2,
+ .pool_size = PAGE_SIZE,
+};
+
+/* The ids are fixed up later in iop13xx_platform_init */
+static struct platform_device iop13xx_adma_0_channel = {
+ .name = "iop-adma",
+ .id = 0,
+ .num_resources = 4,
+ .resource = iop13xx_adma_0_resources,
+ .dev = {
+ .dma_mask = &iop13xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop13xx_adma_0_data,
+ },
+};
+
+static struct platform_device iop13xx_adma_1_channel = {
+ .name = "iop-adma",
+ .id = 0,
+ .num_resources = 4,
+ .resource = iop13xx_adma_1_resources,
+ .dev = {
+ .dma_mask = &iop13xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop13xx_adma_1_data,
+ },
+};
+
+static struct platform_device iop13xx_adma_2_channel = {
+ .name = "iop-adma",
+ .id = 0,
+ .num_resources = 4,
+ .resource = iop13xx_adma_2_resources,
+ .dev = {
+ .dma_mask = &iop13xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop13xx_adma_2_data,
+ },
+};
+
void __init iop13xx_map_io(void)
{
/* Initialize the Static Page Table maps */
iotable_init(iop13xx_std_desc, ARRAY_SIZE(iop13xx_std_desc));
}
-static int init_uart = 0;
-static int init_i2c = 0;
+static int init_uart;
+static int init_i2c;
+static int init_adma;
void __init iop13xx_platform_init(void)
{
int i;
- u32 uart_idx, i2c_idx, plat_idx;
+ u32 uart_idx, i2c_idx, adma_idx, plat_idx;
struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
/* set the bases so we can read the device id */
@@ -294,6 +419,12 @@
}
}
+ if (init_adma == IOP13XX_INIT_ADMA_DEFAULT) {
+ init_adma |= IOP13XX_INIT_ADMA_0;
+ init_adma |= IOP13XX_INIT_ADMA_1;
+ init_adma |= IOP13XX_INIT_ADMA_2;
+ }
+
plat_idx = 0;
uart_idx = 0;
i2c_idx = 0;
@@ -332,6 +463,56 @@
}
}
+ /* initialize adma channel ids and capabilities */
+ adma_idx = 0;
+ for (i = 0; i < IQ81340_NUM_ADMA; i++) {
+ struct iop_adma_platform_data *plat_data;
+ if ((init_adma & (1 << i)) && IOP13XX_SETUP_DEBUG)
+ printk(KERN_INFO
+ "Adding adma%d to platform device list\n", i);
+ switch (init_adma & (1 << i)) {
+ case IOP13XX_INIT_ADMA_0:
+ iop13xx_adma_0_channel.id = adma_idx++;
+ iop13xx_devices[plat_idx++] = &iop13xx_adma_0_channel;
+ plat_data = &iop13xx_adma_0_data;
+ dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+ dma_cap_set(DMA_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+ dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+ break;
+ case IOP13XX_INIT_ADMA_1:
+ iop13xx_adma_1_channel.id = adma_idx++;
+ iop13xx_devices[plat_idx++] = &iop13xx_adma_1_channel;
+ plat_data = &iop13xx_adma_1_data;
+ dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+ dma_cap_set(DMA_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+ dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+ break;
+ case IOP13XX_INIT_ADMA_2:
+ iop13xx_adma_2_channel.id = adma_idx++;
+ iop13xx_devices[plat_idx++] = &iop13xx_adma_2_channel;
+ plat_data = &iop13xx_adma_2_data;
+ dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+ dma_cap_set(DMA_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+ dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+ dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+ dma_cap_set(DMA_PQ_XOR, plat_data->cap_mask);
+ dma_cap_set(DMA_PQ_UPDATE, plat_data->cap_mask);
+ dma_cap_set(DMA_PQ_ZERO_SUM, plat_data->cap_mask);
+ break;
+ }
+ }
+
#ifdef CONFIG_MTD_PHYSMAP
iq8134x_flash_resource.end = iq8134x_flash_resource.start +
iq8134x_probe_flash_size() - 1;
@@ -399,5 +580,35 @@
return 1;
}
+static int __init iop13xx_init_adma_setup(char *str)
+{
+ if (str) {
+ while (*str != '\0') {
+ switch (*str) {
+ case '0':
+ init_adma |= IOP13XX_INIT_ADMA_0;
+ break;
+ case '1':
+ init_adma |= IOP13XX_INIT_ADMA_1;
+ break;
+ case '2':
+ init_adma |= IOP13XX_INIT_ADMA_2;
+ break;
+ case ',':
+ case '=':
+ break;
+ default:
+ PRINTK("\"iop13xx_init_adma\" malformed"
+ " at character: \'%c\'", *str);
+ *(str + 1) = '\0';
+ init_adma = IOP13XX_INIT_ADMA_DEFAULT;
+ }
+ str++;
+ }
+ }
+ return 1;
+}
+
+__setup("iop13xx_init_adma", iop13xx_init_adma_setup);
__setup("iop13xx_init_uart", iop13xx_init_uart_setup);
__setup("iop13xx_init_i2c", iop13xx_init_i2c_setup);
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop32x/glantank.c linux-2.6.22-try2/arch/arm/mach-iop32x/glantank.c
--- linux-2.6.22-570/arch/arm/mach-iop32x/glantank.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop32x/glantank.c 2007-12-19 15:29:23.000000000 -0500
@@ -180,6 +180,8 @@
platform_device_register(&iop3xx_i2c1_device);
platform_device_register(&glantank_flash_device);
platform_device_register(&glantank_serial_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
pm_power_off = glantank_power_off;
}
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop32x/iq31244.c linux-2.6.22-try2/arch/arm/mach-iop32x/iq31244.c
--- linux-2.6.22-570/arch/arm/mach-iop32x/iq31244.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop32x/iq31244.c 2007-12-19 15:29:23.000000000 -0500
@@ -298,9 +298,14 @@
platform_device_register(&iop3xx_i2c1_device);
platform_device_register(&iq31244_flash_device);
platform_device_register(&iq31244_serial_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
if (is_ep80219())
pm_power_off = ep80219_power_off;
+
+ if (!is_80219())
+ platform_device_register(&iop3xx_aau_channel);
}
static int __init force_ep80219_setup(char *str)
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop32x/iq80321.c linux-2.6.22-try2/arch/arm/mach-iop32x/iq80321.c
--- linux-2.6.22-570/arch/arm/mach-iop32x/iq80321.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop32x/iq80321.c 2007-12-19 15:29:23.000000000 -0500
@@ -181,6 +181,9 @@
platform_device_register(&iop3xx_i2c1_device);
platform_device_register(&iq80321_flash_device);
platform_device_register(&iq80321_serial_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
+ platform_device_register(&iop3xx_aau_channel);
}
MACHINE_START(IQ80321, "Intel IQ80321")
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop32x/n2100.c linux-2.6.22-try2/arch/arm/mach-iop32x/n2100.c
--- linux-2.6.22-570/arch/arm/mach-iop32x/n2100.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop32x/n2100.c 2007-12-19 15:29:23.000000000 -0500
@@ -245,6 +245,8 @@
platform_device_register(&iop3xx_i2c0_device);
platform_device_register(&n2100_flash_device);
platform_device_register(&n2100_serial_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
pm_power_off = n2100_power_off;
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop33x/iq80331.c linux-2.6.22-try2/arch/arm/mach-iop33x/iq80331.c
--- linux-2.6.22-570/arch/arm/mach-iop33x/iq80331.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop33x/iq80331.c 2007-12-19 15:29:23.000000000 -0500
@@ -136,6 +136,9 @@
platform_device_register(&iop33x_uart0_device);
platform_device_register(&iop33x_uart1_device);
platform_device_register(&iq80331_flash_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
+ platform_device_register(&iop3xx_aau_channel);
}
MACHINE_START(IQ80331, "Intel IQ80331")
diff -Nurb linux-2.6.22-570/arch/arm/mach-iop33x/iq80332.c linux-2.6.22-try2/arch/arm/mach-iop33x/iq80332.c
--- linux-2.6.22-570/arch/arm/mach-iop33x/iq80332.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-iop33x/iq80332.c 2007-12-19 15:29:23.000000000 -0500
@@ -136,6 +136,9 @@
platform_device_register(&iop33x_uart0_device);
platform_device_register(&iop33x_uart1_device);
platform_device_register(&iq80332_flash_device);
+ platform_device_register(&iop3xx_dma_0_channel);
+ platform_device_register(&iop3xx_dma_1_channel);
+ platform_device_register(&iop3xx_aau_channel);
}
MACHINE_START(IQ80332, "Intel IQ80332")
diff -Nurb linux-2.6.22-570/arch/arm/mach-ixp2000/core.c linux-2.6.22-try2/arch/arm/mach-ixp2000/core.c
--- linux-2.6.22-570/arch/arm/mach-ixp2000/core.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-ixp2000/core.c 2007-12-19 15:29:23.000000000 -0500
@@ -34,6 +34,7 @@
#include
#include
#include
+#include
#include
#include
@@ -184,6 +185,9 @@
void __init ixp2000_uart_init(void)
{
platform_device_register(&ixp2000_serial_device);
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(0, &ixp2000_serial_port);
+#endif
}
diff -Nurb linux-2.6.22-570/arch/arm/mach-ixp2000/ixdp2x01.c linux-2.6.22-try2/arch/arm/mach-ixp2000/ixdp2x01.c
--- linux-2.6.22-570/arch/arm/mach-ixp2000/ixdp2x01.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-ixp2000/ixdp2x01.c 2007-12-19 15:29:23.000000000 -0500
@@ -38,6 +38,7 @@
#include
#include
#include
+#include
#include
#include
@@ -413,6 +414,11 @@
platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
ixp2000_uart_init();
ixdp2x01_uart_init();
+
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(0, ixdp2x01_serial_port1);
+ kgdb8250_add_platform_port(1, ixdp2x01_serial_port1);
+#endif
}
diff -Nurb linux-2.6.22-570/arch/arm/mach-ixp4xx/coyote-setup.c linux-2.6.22-try2/arch/arm/mach-ixp4xx/coyote-setup.c
--- linux-2.6.22-570/arch/arm/mach-ixp4xx/coyote-setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-ixp4xx/coyote-setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -96,6 +96,10 @@
}
platform_add_devices(coyote_devices, ARRAY_SIZE(coyote_devices));
+
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(0, &coyote_uart_data);
+#endif
}
#ifdef CONFIG_ARCH_ADI_COYOTE
diff -Nurb linux-2.6.22-570/arch/arm/mach-ixp4xx/ixdp425-setup.c linux-2.6.22-try2/arch/arm/mach-ixp4xx/ixdp425-setup.c
--- linux-2.6.22-570/arch/arm/mach-ixp4xx/ixdp425-setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-ixp4xx/ixdp425-setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -76,7 +76,8 @@
.mapbase = IXP4XX_UART1_BASE_PHYS,
.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
.irq = IRQ_IXP4XX_UART1,
- .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+ UPF_SHARE_IRQ,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = IXP4XX_UART_XTAL,
@@ -85,7 +86,8 @@
.mapbase = IXP4XX_UART2_BASE_PHYS,
.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
.irq = IRQ_IXP4XX_UART2,
- .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+ UPF_SHARE_IRQ,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = IXP4XX_UART_XTAL,
@@ -123,12 +125,22 @@
platform_add_devices(ixdp425_devices, ARRAY_SIZE(ixdp425_devices));
}
+static void __init ixdp425_map_io(void)
+{
+ ixp4xx_map_io();
+
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(0, &ixdp425_uart_data[0]);
+ kgdb8250_add_platform_port(1, &ixdp425_uart_data[1]);
+#endif
+}
+
#ifdef CONFIG_ARCH_IXDP425
MACHINE_START(IXDP425, "Intel IXDP425 Development Platform")
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP4XX_PERIPHERAL_BASE_PHYS,
.io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc,
- .map_io = ixp4xx_map_io,
+ .map_io = ixdp425_map_io,
.init_irq = ixp4xx_init_irq,
.timer = &ixp4xx_timer,
.boot_params = 0x0100,
@@ -141,7 +153,7 @@
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP4XX_PERIPHERAL_BASE_PHYS,
.io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc,
- .map_io = ixp4xx_map_io,
+ .map_io = ixdp425_map_io,
.init_irq = ixp4xx_init_irq,
.timer = &ixp4xx_timer,
.boot_params = 0x0100,
diff -Nurb linux-2.6.22-570/arch/arm/mach-omap1/serial.c linux-2.6.22-try2/arch/arm/mach-omap1/serial.c
--- linux-2.6.22-570/arch/arm/mach-omap1/serial.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-omap1/serial.c 2007-12-19 15:29:23.000000000 -0500
@@ -15,6 +15,7 @@
#include
#include
#include
+#include
#include
#include
#include
@@ -199,6 +200,9 @@
break;
}
omap_serial_reset(&serial_platform_data[i]);
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(i, &serial_platform_data[i]);
+#endif
}
}
diff -Nurb linux-2.6.22-570/arch/arm/mach-pnx4008/core.c linux-2.6.22-try2/arch/arm/mach-pnx4008/core.c
--- linux-2.6.22-570/arch/arm/mach-pnx4008/core.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-pnx4008/core.c 2007-12-19 15:29:23.000000000 -0500
@@ -224,6 +224,10 @@
spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
/* Switch on the UART clocks */
pnx4008_uart_init();
+#ifdef CONFIG_KGDB_8250
+ kgdb8250_add_platform_port(0, &platform_serial_ports[0]);
+ kgdb8250_add_platform_port(1, &platform_serial_ports[1]);
+#endif
}
static struct map_desc pnx4008_io_desc[] __initdata = {
diff -Nurb linux-2.6.22-570/arch/arm/mach-pxa/Makefile linux-2.6.22-try2/arch/arm/mach-pxa/Makefile
--- linux-2.6.22-570/arch/arm/mach-pxa/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-pxa/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -31,6 +31,7 @@
# Misc features
obj-$(CONFIG_PM) += pm.o sleep.o
obj-$(CONFIG_PXA_SSP) += ssp.o
+obj-$(CONFIG_KGDB_PXA_SERIAL) += kgdb-serial.o
ifeq ($(CONFIG_PXA27x),y)
obj-$(CONFIG_PM) += standby.o
diff -Nurb linux-2.6.22-570/arch/arm/mach-pxa/kgdb-serial.c linux-2.6.22-try2/arch/arm/mach-pxa/kgdb-serial.c
--- linux-2.6.22-570/arch/arm/mach-pxa/kgdb-serial.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/mach-pxa/kgdb-serial.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,97 @@
+/*
+ * linux/arch/arm/mach-pxa/kgdb-serial.c
+ *
+ * Provides low level kgdb serial support hooks for PXA2xx boards
+ *
+ * Author: Nicolas Pitre
+ * Copyright: (C) 2002-2005 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+#if defined(CONFIG_KGDB_PXA_FFUART)
+
+#define UART FFUART
+#define CKEN_UART CKEN6_FFUART
+#define GPIO_RX_MD GPIO34_FFRXD_MD
+#define GPIO_TX_MD GPIO39_FFTXD_MD
+
+#elif defined(CONFIG_KGDB_PXA_BTUART)
+
+#define UART BTUART
+#define CKEN_UART CKEN7_BTUART
+#define GPIO_RX_MD GPIO42_BTRXD_MD
+#define GPIO_TX_MD GPIO43_BTTXD_MD
+
+#elif defined(CONFIG_KGDB_PXA_STUART)
+
+#define UART STUART
+#define CKEN_UART CKEN5_STUART
+#define GPIO_RX_MD GPIO46_STRXD_MD
+#define GPIO_TX_MD GPIO47_STTXD_MD
+
+#endif
+
+#define UART_BAUDRATE (CONFIG_KGDB_BAUDRATE)
+
+static volatile unsigned long *port = (unsigned long *)&UART;
+
+static int kgdb_serial_init(void)
+{
+ pxa_set_cken(CKEN_UART, 1);
+ pxa_gpio_mode(GPIO_RX_MD);
+ pxa_gpio_mode(GPIO_TX_MD);
+
+ port[UART_IER] = 0;
+ port[UART_LCR] = LCR_DLAB;
+ port[UART_DLL] = ((921600 / UART_BAUDRATE) & 0xff);
+ port[UART_DLM] = ((921600 / UART_BAUDRATE) >> 8);
+ port[UART_LCR] = LCR_WLS1 | LCR_WLS0;
+ port[UART_MCR] = 0;
+ port[UART_IER] = IER_UUE;
+ port[UART_FCR] = FCR_ITL_16;
+
+ return 0;
+}
+
+static void kgdb_serial_putchar(u8 c)
+{
+ if (!(CKEN & CKEN_UART) || port[UART_IER] != IER_UUE)
+ kgdb_serial_init();
+ while (!(port[UART_LSR] & LSR_TDRQ))
+ cpu_relax();
+ port[UART_TX] = c;
+}
+
+static void kgdb_serial_flush(void)
+{
+ if ((CKEN & CKEN_UART) && (port[UART_IER] & IER_UUE))
+ while (!(port[UART_LSR] & LSR_TEMT))
+ cpu_relax();
+}
+
+static int kgdb_serial_getchar(void)
+{
+ unsigned char c;
+ if (!(CKEN & CKEN_UART) || port[UART_IER] != IER_UUE)
+ kgdb_serial_init();
+ while (!(port[UART_LSR] & UART_LSR_DR))
+ cpu_relax();
+ c = port[UART_RX];
+ return c;
+}
+
+struct kgdb_io kgdb_io_ops = {
+ .init = kgdb_serial_init,
+ .write_char = kgdb_serial_putchar,
+ .flush = kgdb_serial_flush,
+ .read_char = kgdb_serial_getchar,
+};
diff -Nurb linux-2.6.22-570/arch/arm/mach-versatile/core.c linux-2.6.22-try2/arch/arm/mach-versatile/core.c
--- linux-2.6.22-570/arch/arm/mach-versatile/core.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mach-versatile/core.c 2007-12-19 15:29:23.000000000 -0500
@@ -184,6 +184,14 @@
.type = MT_DEVICE
},
#endif
+#ifdef CONFIG_KGDB_AMBA_PL011
+ {
+ .virtual = IO_ADDRESS(CONFIG_KGDB_AMBA_BASE),
+ .pfn = __phys_to_pfn(CONFIG_KGDB_AMBA_BASE),
+ .length = SZ_4K,
+ .type = MT_DEVICE
+ },
+#endif
#ifdef CONFIG_PCI
{
.virtual = IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
diff -Nurb linux-2.6.22-570/arch/arm/mm/extable.c linux-2.6.22-try2/arch/arm/mm/extable.c
--- linux-2.6.22-570/arch/arm/mm/extable.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/mm/extable.c 2007-12-19 15:29:23.000000000 -0500
@@ -2,6 +2,7 @@
* linux/arch/arm/mm/extable.c
*/
#include
+#include
#include
int fixup_exception(struct pt_regs *regs)
@@ -11,6 +12,12 @@
fixup = search_exception_tables(instruction_pointer(regs));
if (fixup)
regs->ARM_pc = fixup->fixup;
+#ifdef CONFIG_KGDB
+ if (atomic_read(&debugger_active) && kgdb_may_fault)
+ /* Restore our previous state. */
+ kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+ /* Not reached. */
+#endif
return fixup != NULL;
}
diff -Nurb linux-2.6.22-570/arch/arm/plat-iop/Makefile linux-2.6.22-try2/arch/arm/plat-iop/Makefile
--- linux-2.6.22-570/arch/arm/plat-iop/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/arm/plat-iop/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -12,6 +12,7 @@
obj-$(CONFIG_ARCH_IOP32X) += time.o
obj-$(CONFIG_ARCH_IOP32X) += io.o
obj-$(CONFIG_ARCH_IOP32X) += cp6.o
+obj-$(CONFIG_ARCH_IOP32X) += adma.o
# IOP33X
obj-$(CONFIG_ARCH_IOP33X) += gpio.o
@@ -21,6 +22,7 @@
obj-$(CONFIG_ARCH_IOP33X) += time.o
obj-$(CONFIG_ARCH_IOP33X) += io.o
obj-$(CONFIG_ARCH_IOP33X) += cp6.o
+obj-$(CONFIG_ARCH_IOP33X) += adma.o
# IOP13XX
obj-$(CONFIG_ARCH_IOP13XX) += cp6.o
diff -Nurb linux-2.6.22-570/arch/arm/plat-iop/adma.c linux-2.6.22-try2/arch/arm/plat-iop/adma.c
--- linux-2.6.22-570/arch/arm/plat-iop/adma.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/arm/plat-iop/adma.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,209 @@
+/*
+ * platform device definitions for the iop3xx dma/xor engines
+ * Copyright © 2006, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include
+#include
+#include
+#include
+#include
+
+#ifdef CONFIG_ARCH_IOP32X
+#define IRQ_DMA0_EOT IRQ_IOP32X_DMA0_EOT
+#define IRQ_DMA0_EOC IRQ_IOP32X_DMA0_EOC
+#define IRQ_DMA0_ERR IRQ_IOP32X_DMA0_ERR
+
+#define IRQ_DMA1_EOT IRQ_IOP32X_DMA1_EOT
+#define IRQ_DMA1_EOC IRQ_IOP32X_DMA1_EOC
+#define IRQ_DMA1_ERR IRQ_IOP32X_DMA1_ERR
+
+#define IRQ_AA_EOT IRQ_IOP32X_AA_EOT
+#define IRQ_AA_EOC IRQ_IOP32X_AA_EOC
+#define IRQ_AA_ERR IRQ_IOP32X_AA_ERR
+#endif
+#ifdef CONFIG_ARCH_IOP33X
+#define IRQ_DMA0_EOT IRQ_IOP33X_DMA0_EOT
+#define IRQ_DMA0_EOC IRQ_IOP33X_DMA0_EOC
+#define IRQ_DMA0_ERR IRQ_IOP33X_DMA0_ERR
+
+#define IRQ_DMA1_EOT IRQ_IOP33X_DMA1_EOT
+#define IRQ_DMA1_EOC IRQ_IOP33X_DMA1_EOC
+#define IRQ_DMA1_ERR IRQ_IOP33X_DMA1_ERR
+
+#define IRQ_AA_EOT IRQ_IOP33X_AA_EOT
+#define IRQ_AA_EOC IRQ_IOP33X_AA_EOC
+#define IRQ_AA_ERR IRQ_IOP33X_AA_ERR
+#endif
+/* AAU and DMA Channels */
+static struct resource iop3xx_dma_0_resources[] = {
+ [0] = {
+ .start = IOP3XX_DMA_PHYS_BASE(0),
+ .end = IOP3XX_DMA_UPPER_PA(0),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_DMA0_EOT,
+ .end = IRQ_DMA0_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_DMA0_EOC,
+ .end = IRQ_DMA0_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_DMA0_ERR,
+ .end = IRQ_DMA0_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static struct resource iop3xx_dma_1_resources[] = {
+ [0] = {
+ .start = IOP3XX_DMA_PHYS_BASE(1),
+ .end = IOP3XX_DMA_UPPER_PA(1),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_DMA1_EOT,
+ .end = IRQ_DMA1_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_DMA1_EOC,
+ .end = IRQ_DMA1_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_DMA1_ERR,
+ .end = IRQ_DMA1_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+
+static struct resource iop3xx_aau_resources[] = {
+ [0] = {
+ .start = IOP3XX_AAU_PHYS_BASE,
+ .end = IOP3XX_AAU_UPPER_PA,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_AA_EOT,
+ .end = IRQ_AA_EOT,
+ .flags = IORESOURCE_IRQ
+ },
+ [2] = {
+ .start = IRQ_AA_EOC,
+ .end = IRQ_AA_EOC,
+ .flags = IORESOURCE_IRQ
+ },
+ [3] = {
+ .start = IRQ_AA_ERR,
+ .end = IRQ_AA_ERR,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static u64 iop3xx_adma_dmamask = DMA_32BIT_MASK;
+
+static struct iop_adma_platform_data iop3xx_dma_0_data = {
+ .hw_id = DMA0_ID,
+ .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop3xx_dma_1_data = {
+ .hw_id = DMA1_ID,
+ .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop3xx_aau_data = {
+ .hw_id = AAU_ID,
+ .pool_size = 3 * PAGE_SIZE,
+};
+
+struct platform_device iop3xx_dma_0_channel = {
+ .name = "iop-adma",
+ .id = 0,
+ .num_resources = 4,
+ .resource = iop3xx_dma_0_resources,
+ .dev = {
+ .dma_mask = &iop3xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop3xx_dma_0_data,
+ },
+};
+
+struct platform_device iop3xx_dma_1_channel = {
+ .name = "iop-adma",
+ .id = 1,
+ .num_resources = 4,
+ .resource = iop3xx_dma_1_resources,
+ .dev = {
+ .dma_mask = &iop3xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop3xx_dma_1_data,
+ },
+};
+
+struct platform_device iop3xx_aau_channel = {
+ .name = "iop-adma",
+ .id = 2,
+ .num_resources = 4,
+ .resource = iop3xx_aau_resources,
+ .dev = {
+ .dma_mask = &iop3xx_adma_dmamask,
+ .coherent_dma_mask = DMA_64BIT_MASK,
+ .platform_data = (void *) &iop3xx_aau_data,
+ },
+};
+
+static int __init iop3xx_adma_cap_init(void)
+{
+ #ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
+ dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
+ #else
+ dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
+ dma_cap_set(DMA_MEMCPY_CRC32C, iop3xx_dma_0_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
+ #endif
+
+ #ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
+ dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
+ #else
+ dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
+ dma_cap_set(DMA_MEMCPY_CRC32C, iop3xx_dma_1_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
+ #endif
+
+ #ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */
+ dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
+ dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
+ #else
+ dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
+ dma_cap_set(DMA_ZERO_SUM, iop3xx_aau_data.cap_mask);
+ dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
+ dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
+ #endif
+
+ return 0;
+}
+
+arch_initcall(iop3xx_adma_cap_init);
diff -Nurb linux-2.6.22-570/arch/i386/Kconfig linux-2.6.22-try2/arch/i386/Kconfig
--- linux-2.6.22-570/arch/i386/Kconfig 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/Kconfig 2007-12-19 15:29:19.000000000 -0500
@@ -1053,6 +1053,8 @@
source "arch/i386/kernel/cpu/cpufreq/Kconfig"
+source "drivers/cpuidle/Kconfig"
+
endmenu
menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
diff -Nurb linux-2.6.22-570/arch/i386/kernel/Makefile linux-2.6.22-try2/arch/i386/kernel/Makefile
--- linux-2.6.22-570/arch/i386/kernel/Makefile 2007-12-12 18:08:34.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -39,6 +39,7 @@
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_HPET_TIMER) += hpet.o
obj-$(CONFIG_K8_NB) += k8.o
+obj-$(CONFIG_STACK_UNWIND) += unwind.o
obj-$(CONFIG_VMI) += vmi.o vmiclock.o
obj-$(CONFIG_PARAVIRT) += paravirt.o
diff -Nurb linux-2.6.22-570/arch/i386/kernel/acpi/boot.c linux-2.6.22-try2/arch/i386/kernel/acpi/boot.c
--- linux-2.6.22-570/arch/i386/kernel/acpi/boot.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/i386/kernel/acpi/boot.c 2007-12-19 15:29:19.000000000 -0500
@@ -950,14 +950,6 @@
},
{
.callback = force_acpi_ht,
- .ident = "DELL GX240",
- .matches = {
- DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
- DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
- },
- },
- {
- .callback = force_acpi_ht,
.ident = "HP VISUALIZE NT Workstation",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
diff -Nurb linux-2.6.22-570/arch/i386/kernel/apm.c linux-2.6.22-try2/arch/i386/kernel/apm.c
--- linux-2.6.22-570/arch/i386/kernel/apm.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/i386/kernel/apm.c 2007-12-19 15:29:24.000000000 -0500
@@ -222,6 +222,7 @@
#include
#include
#include
+#include
#include
#include
#include
@@ -2311,7 +2312,6 @@
remove_proc_entry("apm", NULL);
return err;
}
- kapmd_task->flags |= PF_NOFREEZE;
wake_up_process(kapmd_task);
if (num_online_cpus() > 1 && !smp ) {
diff -Nurb linux-2.6.22-570/arch/i386/kernel/io_apic.c linux-2.6.22-try2/arch/i386/kernel/io_apic.c
--- linux-2.6.22-570/arch/i386/kernel/io_apic.c 2007-12-12 18:08:34.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/io_apic.c 2007-12-19 15:29:24.000000000 -0500
@@ -667,6 +667,7 @@
set_pending_irq(i, cpumask_of_cpu(0));
}
+ set_freezable();
for ( ; ; ) {
time_remaining = schedule_timeout_interruptible(time_remaining);
try_to_freeze();
diff -Nurb linux-2.6.22-570/arch/i386/kernel/kgdb-jmp.S linux-2.6.22-try2/arch/i386/kernel/kgdb-jmp.S
--- linux-2.6.22-570/arch/i386/kernel/kgdb-jmp.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/kgdb-jmp.S 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,74 @@
+/*
+ * arch/i386/kernel/kgdb-jmp.S
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Author: George Anzinger
+ *
+ * Cribbed from glibc, which carries the following:
+ * Copyright (C) 1996, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
+ * Copyright (C) 2005 by MontaVista Software.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include
+
+#define PCOFF 0
+#define LINKAGE 4 /* just the return address */
+#define PTR_SIZE 4
+#define PARMS LINKAGE /* no space for saved regs */
+#define JMPBUF PARMS
+#define VAL JMPBUF+PTR_SIZE
+
+#define JB_BX 0
+#define JB_SI 1
+#define JB_DI 2
+#define JB_BP 3
+#define JB_SP 4
+#define JB_PC 5
+
+/* This must be called prior to kgdb_fault_longjmp and
+ * kgdb_fault_longjmp must not be called outside of the context of the
+ * last call to kgdb_fault_setjmp.
+ * kgdb_fault_setjmp(int *jmp_buf[6])
+ */
+ENTRY(kgdb_fault_setjmp)
+ movl JMPBUF(%esp), %eax
+
+ /* Save registers. */
+ movl %ebx, (JB_BX*4)(%eax)
+ movl %esi, (JB_SI*4)(%eax)
+ movl %edi, (JB_DI*4)(%eax)
+ /* Save SP as it will be after we return. */
+ leal JMPBUF(%esp), %ecx
+ movl %ecx, (JB_SP*4)(%eax)
+ movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
+ movl %ecx, (JB_PC*4)(%eax)
+ movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
+
+ /* Restore state so we can now try the access. */
+ movl JMPBUF(%esp), %ecx /* User's jmp_buf in %ecx. */
+ /* Save the return address now. */
+ movl (JB_PC*4)(%ecx), %edx
+ /* Restore registers. */
+ movl $0, %eax
+ movl (JB_SP*4)(%ecx), %esp
+ jmp *%edx /* Jump to saved PC. */
+
+/* kgdb_fault_longjmp(int *jmp_buf[6]) */
+ENTRY(kgdb_fault_longjmp)
+ movl JMPBUF(%esp), %ecx /* User's jmp_buf in %ecx. */
+ /* Save the return address now. */
+ movl (JB_PC*4)(%ecx), %edx
+ /* Restore registers. */
+ movl (JB_BX*4)(%ecx), %ebx
+ movl (JB_SI*4)(%ecx), %esi
+ movl (JB_DI*4)(%ecx), %edi
+ movl (JB_BP*4)(%ecx), %ebp
+ movl $1, %eax
+ movl (JB_SP*4)(%ecx), %esp
+ jmp *%edx /* Jump to saved PC. */
diff -Nurb linux-2.6.22-570/arch/i386/kernel/kgdb.c linux-2.6.22-try2/arch/i386/kernel/kgdb.c
--- linux-2.6.22-570/arch/i386/kernel/kgdb.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/kgdb.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,388 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * Copyright (C) 2007 Wind River Systems, Inc.
+ */
+/*
+ * Contributor: Lake Stevens Instrument Division$
+ * Written by: Glenn Engel $
+ * Updated by: Amit Kale
+ * Updated by: Tom Rini
+ * Updated by: Jason Wessel
+ * Modified for 386 by Jim Kingdon, Cygnus Support.
+ * Origianl kgdb, compatibility with 2.1.xx kernel by
+ * David Grothe
+ * Additional support from Tigran Aivazian
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include /* for linux pt_regs struct */
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include "mach_ipi.h"
+
+/* Put the error code here just in case the user cares. */
+int gdb_i386errcode;
+/* Likewise, the vector number here (since GDB only gets the signal
+ number through the usual means, and that's not very specific). */
+int gdb_i386vector = -1;
+
+extern atomic_t cpu_doing_single_step;
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ gdb_regs[_EAX] = regs->eax;
+ gdb_regs[_EBX] = regs->ebx;
+ gdb_regs[_ECX] = regs->ecx;
+ gdb_regs[_EDX] = regs->edx;
+ gdb_regs[_ESI] = regs->esi;
+ gdb_regs[_EDI] = regs->edi;
+ gdb_regs[_EBP] = regs->ebp;
+ gdb_regs[_DS] = regs->xds;
+ gdb_regs[_ES] = regs->xes;
+ gdb_regs[_PS] = regs->eflags;
+ gdb_regs[_CS] = regs->xcs;
+ gdb_regs[_PC] = regs->eip;
+ gdb_regs[_ESP] = (int)(®s->esp);
+ gdb_regs[_SS] = __KERNEL_DS;
+ gdb_regs[_FS] = 0xFFFF;
+ gdb_regs[_GS] = 0xFFFF;
+}
+
+/*
+ * Extracts ebp, esp and eip values understandable by gdb from the values
+ * saved by switch_to.
+ * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp
+ * prior to entering switch_to is 8 greater then the value that is saved.
+ * If switch_to changes, change following code appropriately.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+ gdb_regs[_EAX] = 0;
+ gdb_regs[_EBX] = 0;
+ gdb_regs[_ECX] = 0;
+ gdb_regs[_EDX] = 0;
+ gdb_regs[_ESI] = 0;
+ gdb_regs[_EDI] = 0;
+ gdb_regs[_EBP] = *(unsigned long *)p->thread.esp;
+ gdb_regs[_DS] = __KERNEL_DS;
+ gdb_regs[_ES] = __KERNEL_DS;
+ gdb_regs[_PS] = 0;
+ gdb_regs[_CS] = __KERNEL_CS;
+ gdb_regs[_PC] = p->thread.eip;
+ gdb_regs[_ESP] = p->thread.esp;
+ gdb_regs[_SS] = __KERNEL_DS;
+ gdb_regs[_FS] = 0xFFFF;
+ gdb_regs[_GS] = 0xFFFF;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ regs->eax = gdb_regs[_EAX];
+ regs->ebx = gdb_regs[_EBX];
+ regs->ecx = gdb_regs[_ECX];
+ regs->edx = gdb_regs[_EDX];
+ regs->esi = gdb_regs[_ESI];
+ regs->edi = gdb_regs[_EDI];
+ regs->ebp = gdb_regs[_EBP];
+ regs->xds = gdb_regs[_DS];
+ regs->xes = gdb_regs[_ES];
+ regs->eflags = gdb_regs[_PS];
+ regs->xcs = gdb_regs[_CS];
+ regs->eip = gdb_regs[_PC];
+}
+
+static struct hw_breakpoint {
+ unsigned enabled;
+ unsigned type;
+ unsigned len;
+ unsigned addr;
+} breakinfo[4] = {
+ { .enabled = 0 },
+ { .enabled = 0 },
+ { .enabled = 0 },
+ { .enabled = 0 },
+};
+
+static void kgdb_correct_hw_break(void)
+{
+ int breakno;
+ int correctit;
+ int breakbit;
+ unsigned long dr7;
+
+ get_debugreg(dr7, 7);
+ correctit = 0;
+ for (breakno = 0; breakno < 3; breakno++) {
+ breakbit = 2 << (breakno << 1);
+ if (!(dr7 & breakbit) && breakinfo[breakno].enabled) {
+ correctit = 1;
+ dr7 |= breakbit;
+ dr7 &= ~(0xf0000 << (breakno << 2));
+ dr7 |= (((breakinfo[breakno].len << 2) |
+ breakinfo[breakno].type) << 16) <<
+ (breakno << 2);
+ switch (breakno) {
+ case 0:
+ set_debugreg(breakinfo[breakno].addr, 0);
+ break;
+
+ case 1:
+ set_debugreg(breakinfo[breakno].addr, 1);
+ break;
+
+ case 2:
+ set_debugreg(breakinfo[breakno].addr, 2);
+ break;
+
+ case 3:
+ set_debugreg(breakinfo[breakno].addr, 3);
+ break;
+ }
+ } else if ((dr7 & breakbit) && !breakinfo[breakno].enabled) {
+ correctit = 1;
+ dr7 &= ~breakbit;
+ dr7 &= ~(0xf0000 << (breakno << 2));
+ }
+ }
+ if (correctit)
+ set_debugreg(dr7, 7);
+}
+
+static int kgdb_remove_hw_break(unsigned long addr, int len,
+ enum kgdb_bptype bptype)
+{
+ int i, idx = -1;
+ for (i = 0; i < 4; i++) {
+ if (breakinfo[i].addr == addr && breakinfo[i].enabled) {
+ idx = i;
+ break;
+ }
+ }
+ if (idx == -1)
+ return -1;
+
+ breakinfo[idx].enabled = 0;
+ return 0;
+}
+
+static void kgdb_remove_all_hw_break(void)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ memset(&breakinfo[i], 0, sizeof(struct hw_breakpoint));
+ }
+}
+
+static int kgdb_set_hw_break(unsigned long addr, int len,
+ enum kgdb_bptype bptype)
+{
+ int i, idx = -1;
+ for (i = 0; i < 4; i++) {
+ if (!breakinfo[i].enabled) {
+ idx = i;
+ break;
+ }
+ }
+ if (idx == -1)
+ return -1;
+ if (bptype == bp_hardware_breakpoint) {
+ breakinfo[idx].type = 0;
+ breakinfo[idx].len = 0;
+ } else if (bptype == bp_write_watchpoint) {
+ breakinfo[idx].type = 1;
+ if (len == 1 || len == 2 || len == 4)
+ breakinfo[idx].len = len - 1;
+ else
+ return -1;
+ } else if (bptype == bp_access_watchpoint) {
+ breakinfo[idx].type = 3;
+ if (len == 1 || len == 2 || len == 4)
+ breakinfo[idx].len = len - 1;
+ else
+ return -1;
+ } else
+ return -1;
+ breakinfo[idx].enabled = 1;
+ breakinfo[idx].addr = addr;
+ return 0;
+}
+
+void kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+ /* Disable hardware debugging while we are in kgdb */
+ set_debugreg(0, 7);
+}
+
+void kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+ /* Master processor is completely in the debugger */
+ gdb_i386vector = e_vector;
+ gdb_i386errcode = err_code;
+}
+
+#ifdef CONFIG_SMP
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ send_IPI_allbutself(APIC_DM_NMI);
+}
+#endif
+
+int kgdb_arch_handle_exception(int e_vector, int signo,
+ int err_code, char *remcom_in_buffer,
+ char *remcom_out_buffer,
+ struct pt_regs *linux_regs)
+{
+ long addr;
+ char *ptr;
+ int newPC, dr6;
+
+ switch (remcom_in_buffer[0]) {
+ case 'c':
+ case 's':
+ /* try to read optional parameter, pc unchanged if no parm */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &addr))
+ linux_regs->eip = addr;
+ newPC = linux_regs->eip;
+
+ /* clear the trace bit */
+ linux_regs->eflags &= ~TF_MASK;
+ atomic_set(&cpu_doing_single_step, -1);
+
+ /* set the trace bit if we're stepping */
+ if (remcom_in_buffer[0] == 's') {
+ linux_regs->eflags |= TF_MASK;
+ debugger_step = 1;
+ atomic_set(&cpu_doing_single_step,raw_smp_processor_id());
+ }
+
+ get_debugreg(dr6, 6);
+ if (!(dr6 & 0x4000)) {
+ long breakno;
+ for (breakno = 0; breakno < 4; ++breakno) {
+ if (dr6 & (1 << breakno) &&
+ breakinfo[breakno].type == 0) {
+ /* Set restore flag */
+ linux_regs->eflags |= X86_EFLAGS_RF;
+ break;
+ }
+ }
+ }
+ set_debugreg(0, 6);
+ kgdb_correct_hw_break();
+
+ return (0);
+ } /* switch */
+ /* this means that we do not want to exit from the handler */
+ return -1;
+}
+
+/* Register KGDB with the i386die_chain so that we hook into all of the right
+ * spots. */
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+ void *ptr)
+{
+ struct die_args *args = ptr;
+ struct pt_regs *regs = args->regs;
+
+ /* Bad memory access? */
+ if (cmd == DIE_PAGE_FAULT_NO_CONTEXT && atomic_read(&debugger_active)
+ && kgdb_may_fault) {
+ kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+ return NOTIFY_STOP;
+ } else if (cmd == DIE_PAGE_FAULT)
+ /* A normal page fault, ignore. */
+ return NOTIFY_DONE;
+ else if ((cmd == DIE_NMI || cmd == DIE_NMI_IPI ||
+ cmd == DIE_NMIWATCHDOG) && atomic_read(&debugger_active)) {
+ /* CPU roundup */
+ kgdb_nmihook(raw_smp_processor_id(), regs);
+ return NOTIFY_STOP;
+ } else if (cmd == DIE_DEBUG
+ && atomic_read(&cpu_doing_single_step) == raw_smp_processor_id()
+ && user_mode(regs)) {
+ /* single step exception from kernel space to user space so
+ * eat the exception and continue the process
+ */
+ printk(KERN_ERR "KGDB: trap/step from kernel to user space, resuming...\n");
+ kgdb_arch_handle_exception(args->trapnr, args->signr, args->err, "c","",regs);
+ return NOTIFY_STOP;
+ } else if (cmd == DIE_NMI_IPI || cmd == DIE_NMI || user_mode(regs) ||
+ (cmd == DIE_DEBUG && atomic_read(&debugger_active)))
+ /* Normal watchdog event or userspace debugging, or spurious
+ * debug exception, ignore. */
+ return NOTIFY_DONE;
+
+ kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+
+ return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_notify,
+};
+
+int kgdb_arch_init(void)
+{
+ register_die_notifier(&kgdb_notifier);
+ return 0;
+}
+
+/*
+ * Skip an int3 exception when it occurs after a breakpoint has been
+ * removed. Backtrack eip by 1 since the int3 would have caused it to
+ * increment by 1.
+ */
+
+int kgdb_skipexception(int exception, struct pt_regs *regs)
+{
+ if (exception == 3 && kgdb_isremovedbreak(regs->eip - 1)) {
+ regs->eip -= 1;
+ return 1;
+ }
+ return 0;
+}
+
+unsigned long kgdb_arch_pc(int exception, struct pt_regs *regs)
+{
+ if (exception == 3) {
+ return instruction_pointer(regs) - 1;
+ }
+ return instruction_pointer(regs);
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+ .gdb_bpt_instr = {0xcc},
+ .flags = KGDB_HW_BREAKPOINT,
+ .set_hw_breakpoint = kgdb_set_hw_break,
+ .remove_hw_breakpoint = kgdb_remove_hw_break,
+ .remove_all_hw_break = kgdb_remove_all_hw_break,
+ .correct_hw_break = kgdb_correct_hw_break,
+};
diff -Nurb linux-2.6.22-570/arch/i386/kernel/process.c linux-2.6.22-try2/arch/i386/kernel/process.c
--- linux-2.6.22-570/arch/i386/kernel/process.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/process.c 2007-12-19 15:29:19.000000000 -0500
@@ -179,13 +179,13 @@
/* endless idle loop with no priority at all */
while (1) {
- tick_nohz_stop_sched_tick();
while (!need_resched()) {
void (*idle)(void);
if (__get_cpu_var(cpu_idle_state))
__get_cpu_var(cpu_idle_state) = 0;
+ tick_nohz_stop_sched_tick();
check_pgt_cache();
rmb();
idle = pm_idle;
diff -Nurb linux-2.6.22-570/arch/i386/kernel/setup.c linux-2.6.22-try2/arch/i386/kernel/setup.c
--- linux-2.6.22-570/arch/i386/kernel/setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/i386/kernel/setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -124,6 +124,7 @@
#endif
extern void early_cpu_init(void);
+extern void early_trap_init(void);
extern int root_mountflags;
unsigned long saved_videomode;
@@ -514,6 +515,7 @@
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
pre_setup_arch_hook();
early_cpu_init();
+ early_trap_init();
/*
* FIXME: This isn't an official loader_type right
diff -Nurb linux-2.6.22-570/arch/i386/kernel/signal.c linux-2.6.22-try2/arch/i386/kernel/signal.c
--- linux-2.6.22-570/arch/i386/kernel/signal.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/i386/kernel/signal.c 2007-12-19 15:29:23.000000000 -0500
@@ -199,6 +199,13 @@
return eax;
badframe:
+ if (show_unhandled_signals && printk_ratelimit())
+ printk("%s%s[%d] bad frame in sigreturn frame:%p eip:%lx"
+ " esp:%lx oeax:%lx\n",
+ current->pid > 1 ? KERN_INFO : KERN_EMERG,
+ current->comm, current->pid, frame, regs->eip,
+ regs->esp, regs->orig_eax);
+
force_sig(SIGSEGV, current);
return 0;
}
diff -Nurb linux-2.6.22-570/arch/i386/kernel/syscall_table.S linux-2.6.22-try2/arch/i386/kernel/syscall_table.S
--- linux-2.6.22-570/arch/i386/kernel/syscall_table.S 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/syscall_table.S 2007-12-19 15:29:24.000000000 -0500
@@ -323,3 +323,6 @@
.long sys_signalfd
.long sys_timerfd
.long sys_eventfd
+ .long sys_revokeat
+ .long sys_frevoke /* 325 */
+ .long sys_fallocate
diff -Nurb linux-2.6.22-570/arch/i386/kernel/traps.c linux-2.6.22-try2/arch/i386/kernel/traps.c
--- linux-2.6.22-570/arch/i386/kernel/traps.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/traps.c 2007-12-19 15:29:23.000000000 -0500
@@ -97,6 +97,11 @@
int kstack_depth_to_print = 24;
static unsigned int code_bytes = 64;
+#ifdef CONFIG_STACK_UNWIND
+static int call_trace = 1;
+#else
+#define call_trace (-1)
+#endif
static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
{
@@ -136,6 +141,34 @@
return ebp;
}
+struct ops_and_data {
+ struct stacktrace_ops *ops;
+ void *data;
+};
+
+static asmlinkage int
+dump_trace_unwind(struct unwind_frame_info *info, void *data)
+{
+ struct ops_and_data *oad = (struct ops_and_data *)data;
+ int n = 0;
+ unsigned long sp = UNW_SP(info);
+
+ if (arch_unw_user_mode(info))
+ return -1;
+ while (unwind(info) == 0 && UNW_PC(info)) {
+ n++;
+ oad->ops->address(oad->data, UNW_PC(info));
+ if (arch_unw_user_mode(info))
+ break;
+ if ((sp & ~(PAGE_SIZE - 1)) == (UNW_SP(info) & ~(PAGE_SIZE - 1))
+ && sp > UNW_SP(info))
+ break;
+ sp = UNW_SP(info);
+ touch_nmi_watchdog();
+ }
+ return n;
+}
+
#define MSG(msg) ops->warning(data, msg)
void dump_trace(struct task_struct *task, struct pt_regs *regs,
@@ -147,6 +180,41 @@
if (!task)
task = current;
+ if (call_trace >= 0) {
+ int unw_ret = 0;
+ struct unwind_frame_info info;
+ struct ops_and_data oad = { .ops = ops, .data = data };
+
+ if (regs) {
+ if (unwind_init_frame_info(&info, task, regs) == 0)
+ unw_ret = dump_trace_unwind(&info, &oad);
+ } else if (task == current)
+ unw_ret = unwind_init_running(&info, dump_trace_unwind,
+ &oad);
+ else {
+ if (unwind_init_blocked(&info, task) == 0)
+ unw_ret = dump_trace_unwind(&info, &oad);
+ }
+ if (unw_ret > 0) {
+ if (call_trace == 1 && !arch_unw_user_mode(&info)) {
+ ops->warning_symbol(data,
+ "DWARF2 unwinder stuck at %s",
+ UNW_PC(&info));
+ if (UNW_SP(&info) >= PAGE_OFFSET) {
+ MSG("Leftover inexact backtrace:");
+ stack = (void *)UNW_SP(&info);
+ if (!stack)
+ return;
+ ebp = UNW_FP(&info);
+ } else
+ MSG("Full inexact backtrace again:");
+ } else if (call_trace >= 1)
+ return;
+ else
+ MSG("Full inexact backtrace again:");
+ } else
+ MSG("Inexact backtrace:");
+ }
if (!stack) {
unsigned long dummy;
stack = &dummy;
@@ -614,6 +682,13 @@
current->thread.error_code = error_code;
current->thread.trap_no = 13;
+ if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
+ printk_ratelimit())
+ printk(KERN_INFO
+ "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
+ current->comm, current->pid,
+ regs->eip, regs->esp, error_code);
+
force_sig(SIGSEGV, current);
return;
@@ -854,6 +929,7 @@
*/
clear_dr7:
set_debugreg(0, 7);
+ notify_die(DIE_DEBUG, "debug2", regs, condition, error_code, SIGTRAP);
return;
debug_vm86:
@@ -1118,6 +1194,12 @@
_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
}
+/* Some traps need to be set early. */
+void __init early_trap_init(void) {
+ set_intr_gate(1,&debug);
+ set_system_intr_gate(3, &int3); /* int3 can be called from all */
+ set_intr_gate(14,&page_fault);
+}
void __init trap_init(void)
{
@@ -1134,10 +1216,8 @@
#endif
set_trap_gate(0,÷_error);
- set_intr_gate(1,&debug);
set_intr_gate(2,&nmi);
- set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
- set_system_gate(4,&overflow);
+ set_system_gate(4,&overflow); /* int4/5 can be called from all */
set_trap_gate(5,&bounds);
set_trap_gate(6,&invalid_op);
set_trap_gate(7,&device_not_available);
@@ -1147,7 +1227,6 @@
set_trap_gate(11,&segment_not_present);
set_trap_gate(12,&stack_segment);
set_trap_gate(13,&general_protection);
- set_intr_gate(14,&page_fault);
set_trap_gate(15,&spurious_interrupt_bug);
set_trap_gate(16,&coprocessor_error);
set_trap_gate(17,&alignment_check);
@@ -1204,3 +1283,19 @@
return 1;
}
__setup("code_bytes=", code_bytes_setup);
+
+#ifdef CONFIG_STACK_UNWIND
+static int __init call_trace_setup(char *s)
+{
+ if (strcmp(s, "old") == 0)
+ call_trace = -1;
+ else if (strcmp(s, "both") == 0)
+ call_trace = 0;
+ else if (strcmp(s, "newfallback") == 0)
+ call_trace = 1;
+ else if (strcmp(s, "new") == 2)
+ call_trace = 2;
+ return 1;
+}
+__setup("call_trace=", call_trace_setup);
+#endif
diff -Nurb linux-2.6.22-570/arch/i386/kernel/unwind.S linux-2.6.22-try2/arch/i386/kernel/unwind.S
--- linux-2.6.22-570/arch/i386/kernel/unwind.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/kernel/unwind.S 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,36 @@
+/* Assembler support code for dwarf2 unwinder */
+#include
+#include
+#include
+#include
+#include
+
+ENTRY(arch_unwind_init_running)
+ CFI_STARTPROC
+ movl 4(%esp), %edx
+ movl (%esp), %ecx
+ leal 4(%esp), %eax
+ movl %ebx, PT_EBX(%edx)
+ xorl %ebx, %ebx
+ movl %ebx, PT_ECX(%edx)
+ movl %ebx, PT_EDX(%edx)
+ movl %esi, PT_ESI(%edx)
+ movl %edi, PT_EDI(%edx)
+ movl %ebp, PT_EBP(%edx)
+ movl %ebx, PT_EAX(%edx)
+ movl $__USER_DS, PT_DS(%edx)
+ movl $__USER_DS, PT_ES(%edx)
+ movl $0, PT_FS(%edx)
+ movl %ebx, PT_ORIG_EAX(%edx)
+ movl %ecx, PT_EIP(%edx)
+ movl 12(%esp), %ecx
+ movl $__KERNEL_CS, PT_CS(%edx)
+ movl %ebx, PT_EFLAGS(%edx)
+ movl %eax, PT_OLDESP(%edx)
+ movl 8(%esp), %eax
+ movl %ecx, 8(%esp)
+ movl PT_EBX(%edx), %ebx
+ movl $__KERNEL_DS, PT_OLDSS(%edx)
+ jmpl *%eax
+ CFI_ENDPROC
+ENDPROC(arch_unwind_init_running)
diff -Nurb linux-2.6.22-570/arch/i386/mach-voyager/voyager_thread.c linux-2.6.22-try2/arch/i386/mach-voyager/voyager_thread.c
--- linux-2.6.22-570/arch/i386/mach-voyager/voyager_thread.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/i386/mach-voyager/voyager_thread.c 2007-12-19 15:29:23.000000000 -0500
@@ -52,7 +52,7 @@
NULL,
};
- if ((ret = call_usermodehelper(argv[0], argv, envp, 1)) != 0) {
+ if ((ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC)) != 0) {
printk(KERN_ERR "Voyager failed to run \"%s\": %i\n",
string, ret);
}
diff -Nurb linux-2.6.22-570/arch/i386/mm/fault.c linux-2.6.22-try2/arch/i386/mm/fault.c
--- linux-2.6.22-570/arch/i386/mm/fault.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/i386/mm/fault.c 2007-12-19 15:29:23.000000000 -0500
@@ -284,6 +284,8 @@
return 0;
}
+int show_unhandled_signals = 1;
+
/*
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
@@ -471,6 +473,14 @@
if (is_prefetch(regs, address, error_code))
return;
+ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+ printk_ratelimit()) {
+ printk("%s%s[%d]: segfault at %08lx eip %08lx "
+ "esp %08lx error %lx\n",
+ tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+ tsk->comm, tsk->pid, address, regs->eip,
+ regs->esp, error_code);
+ }
tsk->thread.cr2 = address;
/* Kernel addresses are always protection faults */
tsk->thread.error_code = error_code | (address >= TASK_SIZE);
@@ -508,6 +518,10 @@
if (is_prefetch(regs, address, error_code))
return;
+ if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+ error_code, 14, SIGSEGV) == NOTIFY_STOP)
+ return;
+
/*
* Oops. The kernel tried to access some bad page. We'll have to
* terminate things with extreme prejudice.
diff -Nurb linux-2.6.22-570/arch/ia64/kernel/Makefile linux-2.6.22-try2/arch/ia64/kernel/Makefile
--- linux-2.6.22-570/arch/ia64/kernel/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/ia64/kernel/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -35,6 +35,7 @@
obj-$(CONFIG_PCI_MSI) += msi_ia64.o
mca_recovery-y += mca_drv.o mca_drv_asm.o
obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o
+obj-$(CONFIG_KGDB) += kgdb.o kgdb-jmp.o
obj-$(CONFIG_IA64_ESI) += esi.o
ifneq ($(CONFIG_IA64_ESI),)
diff -Nurb linux-2.6.22-570/arch/ia64/kernel/kgdb-jmp.S linux-2.6.22-try2/arch/ia64/kernel/kgdb-jmp.S
--- linux-2.6.22-570/arch/ia64/kernel/kgdb-jmp.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/ia64/kernel/kgdb-jmp.S 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,238 @@
+/* setjmp() and longjmp() assembler support for kdb on ia64.
+
+ This code was copied from glibc CVS as of 2001-06-27 and modified where
+ necessary to fit the kernel.
+ Keith Owens 2001-06-27
+ */
+
+/* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ Contributed by David Mosberger-Tang .
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include
+GLOBAL_ENTRY(kgdb_fault_setjmp)
+ .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
+ alloc loc1=ar.pfs,2,2,2,0
+ mov r16=ar.unat
+ ;;
+ mov r17=ar.fpsr
+ mov r2=in0
+ add r3=8,in0
+ ;;
+.mem.offset 0,0;
+ st8.spill.nta [r2]=sp,16 // r12 (sp)
+.mem.offset 8,0;
+ st8.spill.nta [r3]=gp,16 // r1 (gp)
+ ;;
+ st8.nta [r2]=r16,16 // save caller's unat
+ st8.nta [r3]=r17,16 // save fpsr
+ add r8=0xa0,in0
+ ;;
+.mem.offset 160,0;
+ st8.spill.nta [r2]=r4,16 // r4
+.mem.offset 168,0;
+ st8.spill.nta [r3]=r5,16 // r5
+ add r9=0xb0,in0
+ ;;
+ stf.spill.nta [r8]=f2,32
+ stf.spill.nta [r9]=f3,32
+ mov loc0=rp
+ .body
+ ;;
+ stf.spill.nta [r8]=f4,32
+ stf.spill.nta [r9]=f5,32
+ mov r17=b1
+ ;;
+ stf.spill.nta [r8]=f16,32
+ stf.spill.nta [r9]=f17,32
+ mov r18=b2
+ ;;
+ stf.spill.nta [r8]=f18,32
+ stf.spill.nta [r9]=f19,32
+ mov r19=b3
+ ;;
+ stf.spill.nta [r8]=f20,32
+ stf.spill.nta [r9]=f21,32
+ mov r20=b4
+ ;;
+ stf.spill.nta [r8]=f22,32
+ stf.spill.nta [r9]=f23,32
+ mov r21=b5
+ ;;
+ stf.spill.nta [r8]=f24,32
+ stf.spill.nta [r9]=f25,32
+ mov r22=ar.lc
+ ;;
+ stf.spill.nta [r8]=f26,32
+ stf.spill.nta [r9]=f27,32
+ mov r24=pr
+ ;;
+ stf.spill.nta [r8]=f28,32
+ stf.spill.nta [r9]=f29,32
+ ;;
+ stf.spill.nta [r8]=f30
+ stf.spill.nta [r9]=f31
+
+.mem.offset 0,0;
+ st8.spill.nta [r2]=r6,16 // r6
+.mem.offset 8,0;
+ st8.spill.nta [r3]=r7,16 // r7
+ ;;
+ mov r23=ar.bsp
+ mov r25=ar.unat
+ st8.nta [r2]=loc0,16 // b0
+ st8.nta [r3]=r17,16 // b1
+ ;;
+ st8.nta [r2]=r18,16 // b2
+ st8.nta [r3]=r19,16 // b3
+ ;;
+ st8.nta [r2]=r20,16 // b4
+ st8.nta [r3]=r21,16 // b5
+ ;;
+ st8.nta [r2]=loc1,16 // ar.pfs
+ st8.nta [r3]=r22,16 // ar.lc
+ ;;
+ st8.nta [r2]=r24,16 // pr
+ st8.nta [r3]=r23,16 // ar.bsp
+ ;;
+ st8.nta [r2]=r25 // ar.unat
+ st8.nta [r3]=in0 // &__jmp_buf
+ mov r8=0
+ mov rp=loc0
+ mov ar.pfs=loc1
+ br.ret.sptk.few rp
+END(kdba_setjmp)
+#define pPos p6 /* is rotate count positive? */
+#define pNeg p7 /* is rotate count negative? */
+GLOBAL_ENTRY(kgdb_fault_longjmp)
+ alloc r8=ar.pfs,2,1,0,0
+ mov r27=ar.rsc
+ add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
+ ;;
+ ld8 r8=[r2],-16 // r8 <- orig_jmp_buf_addr
+ mov r10=ar.bsp
+ and r11=~0x3,r27 // clear ar.rsc.mode
+ ;;
+ flushrs // flush dirty regs to backing store (must be first in insn grp)
+ ld8 r23=[r2],8 // r23 <- jmpbuf.ar_bsp
+ sub r8=r8,in0 // r8 <- &orig_jmpbuf - &jmpbuf
+ ;;
+ ld8 r25=[r2] // r25 <- jmpbuf.ar_unat
+ extr.u r8=r8,3,6 // r8 <- (&orig_jmpbuf - &jmpbuf)/8 & 0x3f
+ ;;
+ cmp.lt pNeg,pPos=r8,r0
+ mov r2=in0
+ ;;
+(pPos) mov r16=r8
+(pNeg) add r16=64,r8
+(pPos) sub r17=64,r8
+(pNeg) sub r17=r0,r8
+ ;;
+ mov ar.rsc=r11 // put RSE in enforced lazy mode
+ shr.u r8=r25,r16
+ add r3=8,in0 // r3 <- &jmpbuf.r1
+ shl r9=r25,r17
+ ;;
+ or r25=r8,r9
+ ;;
+ mov r26=ar.rnat
+ mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
+ ;;
+ ld8.fill.nta sp=[r2],16 // r12 (sp)
+ ld8.fill.nta gp=[r3],16 // r1 (gp)
+ dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ ;;
+ ld8.nta r16=[r2],16 // caller's unat
+ ld8.nta r17=[r3],16 // fpsr
+ ;;
+ ld8.fill.nta r4=[r2],16 // r4
+ ld8.fill.nta r5=[r3],16 // r5 (gp)
+ cmp.geu p8,p0=r10,r11 // p8 <- (ar.bsp >= jmpbuf.ar_bsp)
+ ;;
+ ld8.fill.nta r6=[r2],16 // r6
+ ld8.fill.nta r7=[r3],16 // r7
+ ;;
+ mov ar.unat=r16 // restore caller's unat
+ mov ar.fpsr=r17 // restore fpsr
+ ;;
+ ld8.nta r16=[r2],16 // b0
+ ld8.nta r17=[r3],16 // b1
+ ;;
+(p8) ld8 r26=[r11] // r26 <- *ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ mov ar.bspstore=r23 // restore ar.bspstore
+ ;;
+ ld8.nta r18=[r2],16 // b2
+ ld8.nta r19=[r3],16 // b3
+ ;;
+ ld8.nta r20=[r2],16 // b4
+ ld8.nta r21=[r3],16 // b5
+ ;;
+ ld8.nta r11=[r2],16 // ar.pfs
+ ld8.nta r22=[r3],56 // ar.lc
+ ;;
+ ld8.nta r24=[r2],32 // pr
+ mov b0=r16
+ ;;
+ ldf.fill.nta f2=[r2],32
+ ldf.fill.nta f3=[r3],32
+ mov b1=r17
+ ;;
+ ldf.fill.nta f4=[r2],32
+ ldf.fill.nta f5=[r3],32
+ mov b2=r18
+ ;;
+ ldf.fill.nta f16=[r2],32
+ ldf.fill.nta f17=[r3],32
+ mov b3=r19
+ ;;
+ ldf.fill.nta f18=[r2],32
+ ldf.fill.nta f19=[r3],32
+ mov b4=r20
+ ;;
+ ldf.fill.nta f20=[r2],32
+ ldf.fill.nta f21=[r3],32
+ mov b5=r21
+ ;;
+ ldf.fill.nta f22=[r2],32
+ ldf.fill.nta f23=[r3],32
+ mov ar.lc=r22
+ ;;
+ ldf.fill.nta f24=[r2],32
+ ldf.fill.nta f25=[r3],32
+ cmp.eq p8,p9=0,in1
+ ;;
+ ldf.fill.nta f26=[r2],32
+ ldf.fill.nta f27=[r3],32
+ mov ar.pfs=r11
+ ;;
+ ldf.fill.nta f28=[r2],32
+ ldf.fill.nta f29=[r3],32
+ ;;
+ ldf.fill.nta f30=[r2]
+ ldf.fill.nta f31=[r3]
+(p8) mov r8=1
+
+ mov ar.rnat=r26 // restore ar.rnat
+ ;;
+ mov ar.rsc=r27 // restore ar.rsc
+(p9) mov r8=in1
+
+ invala // virt. -> phys. regnum mapping may change
+ mov pr=r24,-1
+ br.ret.sptk.few rp
+END(kgdb_fault_longjmp)
diff -Nurb linux-2.6.22-570/arch/ia64/kernel/kgdb.c linux-2.6.22-try2/arch/ia64/kernel/kgdb.c
--- linux-2.6.22-570/arch/ia64/kernel/kgdb.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/ia64/kernel/kgdb.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,944 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * (c) Copyright 2005 Hewlett-Packard Development Company, L.P.
+ * Bob Picco
+ */
+/*
+ * Contributor: Lake Stevens Instrument Division$
+ * Written by: Glenn Engel $
+ * Updated by: Amit Kale
+ * Modified for 386 by Jim Kingdon, Cygnus Support.
+ * Origianl kgdb, compatibility with 2.1.xx kernel by David Grothe
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include /* for linux pt_regs struct */
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define NUM_REGS 590
+#define REGISTER_BYTES (NUM_REGS*8+128*8)
+#define REGISTER_BYTE(N) (((N) * 8) \
+ + ((N) <= IA64_FR0_REGNUM ? \
+ 0 : 8 * (((N) > IA64_FR127_REGNUM) ? 128 : (N) - IA64_FR0_REGNUM)))
+#define REGISTER_SIZE(N) \
+ (((N) >= IA64_FR0_REGNUM && (N) <= IA64_FR127_REGNUM) ? 16 : 8)
+#define IA64_GR0_REGNUM 0
+#define IA64_FR0_REGNUM 128
+#define IA64_FR127_REGNUM (IA64_FR0_REGNUM+127)
+#define IA64_PR0_REGNUM 256
+#define IA64_BR0_REGNUM 320
+#define IA64_VFP_REGNUM 328
+#define IA64_PR_REGNUM 330
+#define IA64_IP_REGNUM 331
+#define IA64_PSR_REGNUM 332
+#define IA64_CFM_REGNUM 333
+#define IA64_AR0_REGNUM 334
+#define IA64_NAT0_REGNUM 462
+#define IA64_NAT31_REGNUM (IA64_NAT0_REGNUM+31)
+#define IA64_NAT32_REGNUM (IA64_NAT0_REGNUM+32)
+#define IA64_RSC_REGNUM (IA64_AR0_REGNUM+16)
+#define IA64_BSP_REGNUM (IA64_AR0_REGNUM+17)
+#define IA64_BSPSTORE_REGNUM (IA64_AR0_REGNUM+18)
+#define IA64_RNAT_REGNUM (IA64_AR0_REGNUM+19)
+#define IA64_FCR_REGNUM (IA64_AR0_REGNUM+21)
+#define IA64_EFLAG_REGNUM (IA64_AR0_REGNUM+24)
+#define IA64_CSD_REGNUM (IA64_AR0_REGNUM+25)
+#define IA64_SSD_REGNUM (IA64_AR0_REGNUM+26)
+#define IA64_CFLG_REGNUM (IA64_AR0_REGNUM+27)
+#define IA64_FSR_REGNUM (IA64_AR0_REGNUM+28)
+#define IA64_FIR_REGNUM (IA64_AR0_REGNUM+29)
+#define IA64_FDR_REGNUM (IA64_AR0_REGNUM+30)
+#define IA64_CCV_REGNUM (IA64_AR0_REGNUM+32)
+#define IA64_UNAT_REGNUM (IA64_AR0_REGNUM+36)
+#define IA64_FPSR_REGNUM (IA64_AR0_REGNUM+40)
+#define IA64_ITC_REGNUM (IA64_AR0_REGNUM+44)
+#define IA64_PFS_REGNUM (IA64_AR0_REGNUM+64)
+#define IA64_LC_REGNUM (IA64_AR0_REGNUM+65)
+#define IA64_EC_REGNUM (IA64_AR0_REGNUM+66)
+
+#define REGISTER_INDEX(N) (REGISTER_BYTE(N) / sizeof (unsigned long))
+#define BREAK_INSTR_ALIGN (~0xfULL)
+
+#define ptoff(V) ((unsigned int) &((struct pt_regs *)0x0)->V)
+struct reg_to_ptreg_index {
+ unsigned int reg;
+ unsigned int ptregoff;
+};
+
+static struct reg_to_ptreg_index gr_reg_to_ptreg_index[] = {
+ {IA64_GR0_REGNUM + 1, ptoff(r1)},
+ {IA64_GR0_REGNUM + 2, ptoff(r2)},
+ {IA64_GR0_REGNUM + 3, ptoff(r3)},
+ {IA64_GR0_REGNUM + 8, ptoff(r8)},
+ {IA64_GR0_REGNUM + 9, ptoff(r9)},
+ {IA64_GR0_REGNUM + 10, ptoff(r10)},
+ {IA64_GR0_REGNUM + 11, ptoff(r11)},
+ {IA64_GR0_REGNUM + 12, ptoff(r12)},
+ {IA64_GR0_REGNUM + 13, ptoff(r13)},
+ {IA64_GR0_REGNUM + 14, ptoff(r14)},
+ {IA64_GR0_REGNUM + 15, ptoff(r15)},
+ {IA64_GR0_REGNUM + 16, ptoff(r16)},
+ {IA64_GR0_REGNUM + 17, ptoff(r17)},
+ {IA64_GR0_REGNUM + 18, ptoff(r18)},
+ {IA64_GR0_REGNUM + 19, ptoff(r19)},
+ {IA64_GR0_REGNUM + 20, ptoff(r20)},
+ {IA64_GR0_REGNUM + 21, ptoff(r21)},
+ {IA64_GR0_REGNUM + 22, ptoff(r22)},
+ {IA64_GR0_REGNUM + 23, ptoff(r23)},
+ {IA64_GR0_REGNUM + 24, ptoff(r24)},
+ {IA64_GR0_REGNUM + 25, ptoff(r25)},
+ {IA64_GR0_REGNUM + 26, ptoff(r26)},
+ {IA64_GR0_REGNUM + 27, ptoff(r27)},
+ {IA64_GR0_REGNUM + 28, ptoff(r28)},
+ {IA64_GR0_REGNUM + 29, ptoff(r29)},
+ {IA64_GR0_REGNUM + 30, ptoff(r30)},
+ {IA64_GR0_REGNUM + 31, ptoff(r31)},
+};
+
+static struct reg_to_ptreg_index br_reg_to_ptreg_index[] = {
+ {IA64_BR0_REGNUM, ptoff(b0)},
+ {IA64_BR0_REGNUM + 6, ptoff(b6)},
+ {IA64_BR0_REGNUM + 7, ptoff(b7)},
+};
+
+static struct reg_to_ptreg_index ar_reg_to_ptreg_index[] = {
+ {IA64_PFS_REGNUM, ptoff(ar_pfs)},
+ {IA64_UNAT_REGNUM, ptoff(ar_unat)},
+ {IA64_RNAT_REGNUM, ptoff(ar_rnat)},
+ {IA64_BSPSTORE_REGNUM, ptoff(ar_bspstore)},
+ {IA64_RSC_REGNUM, ptoff(ar_rsc)},
+ {IA64_CSD_REGNUM, ptoff(ar_csd)},
+ {IA64_SSD_REGNUM, ptoff(ar_ssd)},
+ {IA64_FPSR_REGNUM, ptoff(ar_fpsr)},
+ {IA64_CCV_REGNUM, ptoff(ar_ccv)},
+};
+
+extern atomic_t cpu_doing_single_step;
+
+static int kgdb_gr_reg(int regnum, struct unw_frame_info *info,
+ unsigned long *reg, int rw)
+{
+ char nat;
+
+ if ((regnum >= IA64_GR0_REGNUM && regnum <= (IA64_GR0_REGNUM + 1)) ||
+ (regnum >= (IA64_GR0_REGNUM + 4) &&
+ regnum <= (IA64_GR0_REGNUM + 7)))
+ return !unw_access_gr(info, regnum - IA64_GR0_REGNUM,
+ reg, &nat, rw);
+ else
+ return 0;
+}
+static int kgdb_gr_ptreg(int regnum, struct pt_regs * ptregs,
+ struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+ int i, result = 1;
+ char nat;
+
+ if (!((regnum >= (IA64_GR0_REGNUM + 2) &&
+ regnum <= (IA64_GR0_REGNUM + 3)) ||
+ (regnum >= (IA64_GR0_REGNUM + 8) &&
+ regnum <= (IA64_GR0_REGNUM + 15)) ||
+ (regnum >= (IA64_GR0_REGNUM + 16) &&
+ regnum <= (IA64_GR0_REGNUM + 31))))
+ return 0;
+ else if (rw && ptregs) {
+ for (i = 0; i < ARRAY_SIZE(gr_reg_to_ptreg_index); i++)
+ if (gr_reg_to_ptreg_index[i].reg == regnum) {
+ *((unsigned long *)(((void *)ptregs) +
+ gr_reg_to_ptreg_index[i].ptregoff)) = *reg;
+ break;
+ }
+ } else if (!rw && ptregs) {
+ for (i = 0; i < ARRAY_SIZE(gr_reg_to_ptreg_index); i++)
+ if (gr_reg_to_ptreg_index[i].reg == regnum) {
+ *reg = *((unsigned long *)
+ (((void *)ptregs) +
+ gr_reg_to_ptreg_index[i].ptregoff));
+ break;
+ }
+ } else
+ result = !unw_access_gr(info, regnum - IA64_GR0_REGNUM,
+ reg, &nat, rw);
+ return result;
+}
+
+static int kgdb_br_reg(int regnum, struct pt_regs * ptregs,
+ struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+ int i, result = 1;
+
+ if (!(regnum >= IA64_BR0_REGNUM && regnum <= (IA64_BR0_REGNUM + 7)))
+ return 0;
+
+ switch (regnum) {
+ case IA64_BR0_REGNUM:
+ case IA64_BR0_REGNUM + 6:
+ case IA64_BR0_REGNUM + 7:
+ if (rw) {
+ for (i = 0; i < ARRAY_SIZE(br_reg_to_ptreg_index); i++)
+ if (br_reg_to_ptreg_index[i].reg == regnum) {
+ *((unsigned long *)
+ (((void *)ptregs) +
+ br_reg_to_ptreg_index[i].ptregoff)) =
+ *reg;
+ break;
+ }
+ } else
+ for (i = 0; i < ARRAY_SIZE(br_reg_to_ptreg_index); i++)
+ if (br_reg_to_ptreg_index[i].reg == regnum) {
+ *reg = *((unsigned long *)
+ (((void *)ptregs) +
+ br_reg_to_ptreg_index[i].
+ ptregoff));
+ break;
+ }
+ break;
+ case IA64_BR0_REGNUM + 1:
+ case IA64_BR0_REGNUM + 2:
+ case IA64_BR0_REGNUM + 3:
+ case IA64_BR0_REGNUM + 4:
+ case IA64_BR0_REGNUM + 5:
+ result = !unw_access_br(info, regnum - IA64_BR0_REGNUM,
+ reg, rw);
+ break;
+ }
+
+ return result;
+}
+
+static int kgdb_fr_reg(int regnum, char *inbuffer, struct pt_regs * ptregs,
+ struct unw_frame_info *info, unsigned long *reg,
+ struct ia64_fpreg *freg, int rw)
+{
+ int result = 1;
+
+ if (!(regnum >= IA64_FR0_REGNUM && regnum <= (IA64_FR0_REGNUM + 127)))
+ return 0;
+
+ switch (regnum) {
+ case IA64_FR0_REGNUM + 6:
+ case IA64_FR0_REGNUM + 7:
+ case IA64_FR0_REGNUM + 8:
+ case IA64_FR0_REGNUM + 9:
+ case IA64_FR0_REGNUM + 10:
+ case IA64_FR0_REGNUM + 11:
+ case IA64_FR0_REGNUM + 12:
+ if (rw) {
+ char *ptr = inbuffer;
+
+ freg->u.bits[0] = *reg;
+ kgdb_hex2long(&ptr, &freg->u.bits[1]);
+ *(&ptregs->f6 + (regnum - (IA64_FR0_REGNUM + 6))) =
+ *freg;
+ break;
+ } else if (!ptregs)
+ result = !unw_access_fr(info, regnum - IA64_FR0_REGNUM,
+ freg, rw);
+ else
+ *freg =
+ *(&ptregs->f6 + (regnum - (IA64_FR0_REGNUM + 6)));
+ break;
+ default:
+ if (!rw)
+ result = !unw_access_fr(info, regnum - IA64_FR0_REGNUM,
+ freg, rw);
+ else
+ result = 0;
+ break;
+ }
+
+ return result;
+}
+
+static int kgdb_ar_reg(int regnum, struct pt_regs * ptregs,
+ struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+ int result = 0, i;
+
+ if (!(regnum >= IA64_AR0_REGNUM && regnum <= IA64_EC_REGNUM))
+ return 0;
+
+ if (rw && ptregs) {
+ for (i = 0; i < ARRAY_SIZE(ar_reg_to_ptreg_index); i++)
+ if (ar_reg_to_ptreg_index[i].reg == regnum) {
+ *((unsigned long *) (((void *)ptregs) +
+ ar_reg_to_ptreg_index[i].ptregoff)) =
+ *reg;
+ result = 1;
+ break;
+ }
+ } else if (ptregs) {
+ for (i = 0; i < ARRAY_SIZE(ar_reg_to_ptreg_index); i++)
+ if (ar_reg_to_ptreg_index[i].reg == regnum) {
+ *reg = *((unsigned long *) (((void *)ptregs) +
+ ar_reg_to_ptreg_index[i].ptregoff));
+ result = 1;
+ break;
+ }
+ }
+
+ if (result)
+ return result;
+
+ result = 1;
+
+ switch (regnum) {
+ case IA64_CSD_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_CSD, reg, rw);
+ break;
+ case IA64_SSD_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_SSD, reg, rw);
+ break;
+ case IA64_UNAT_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+ break;
+ case IA64_RNAT_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+ break;
+ case IA64_BSPSTORE_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+ break;
+ case IA64_PFS_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+ break;
+ case IA64_LC_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_LC, reg, rw);
+ break;
+ case IA64_EC_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_EC, reg, rw);
+ break;
+ case IA64_FPSR_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_FPSR, reg, rw);
+ break;
+ case IA64_RSC_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_RSC, reg, rw);
+ break;
+ case IA64_CCV_REGNUM:
+ result = !unw_access_ar(info, UNW_AR_CCV, reg, rw);
+ break;
+ default:
+ result = 0;
+ }
+
+ return result;
+}
+
+void kgdb_get_reg(char *outbuffer, int regnum, struct unw_frame_info *info,
+ struct pt_regs *ptregs)
+{
+ unsigned long reg, size = 0, *mem = ®
+ struct ia64_fpreg freg;
+
+ if (kgdb_gr_reg(regnum, info, ®, 0) ||
+ kgdb_gr_ptreg(regnum, ptregs, info, ®, 0) ||
+ kgdb_br_reg(regnum, ptregs, info, ®, 0) ||
+ kgdb_ar_reg(regnum, ptregs, info, ®, 0))
+ size = sizeof(reg);
+ else if (kgdb_fr_reg(regnum, NULL, ptregs, info, ®, &freg, 0)) {
+ size = sizeof(freg);
+ mem = (unsigned long *)&freg;
+ } else if (regnum == IA64_IP_REGNUM) {
+ if (!ptregs) {
+ unw_get_ip(info, ®);
+ size = sizeof(reg);
+ } else {
+ reg = ptregs->cr_iip;
+ size = sizeof(reg);
+ }
+ } else if (regnum == IA64_CFM_REGNUM) {
+ if (!ptregs)
+ unw_get_cfm(info, ®);
+ else
+ reg = ptregs->cr_ifs;
+ size = sizeof(reg);
+ } else if (regnum == IA64_PSR_REGNUM) {
+ if (!ptregs && kgdb_usethread)
+ ptregs = (struct pt_regs *)
+ ((unsigned long)kgdb_usethread +
+ IA64_STK_OFFSET) - 1;
+ if (ptregs)
+ reg = ptregs->cr_ipsr;
+ size = sizeof(reg);
+ } else if (regnum == IA64_PR_REGNUM) {
+ if (ptregs)
+ reg = ptregs->pr;
+ else
+ unw_access_pr(info, ®, 0);
+ size = sizeof(reg);
+ } else if (regnum == IA64_BSP_REGNUM) {
+ unw_get_bsp(info, ®);
+ size = sizeof(reg);
+ }
+
+ if (size) {
+ kgdb_mem2hex((char *) mem, outbuffer, size);
+ outbuffer[size*2] = 0;
+ }
+ else
+ strcpy(outbuffer, "E0");
+
+ return;
+}
+
+void kgdb_put_reg(char *inbuffer, char *outbuffer, int regnum,
+ struct unw_frame_info *info, struct pt_regs *ptregs)
+{
+ unsigned long reg;
+ struct ia64_fpreg freg;
+ char *ptr = inbuffer;
+
+ kgdb_hex2long(&ptr, ®);
+ strcpy(outbuffer, "OK");
+
+ if (kgdb_gr_reg(regnum, info, ®, 1) ||
+ kgdb_gr_ptreg(regnum, ptregs, info, ®, 1) ||
+ kgdb_br_reg(regnum, ptregs, info, ®, 1) ||
+ kgdb_fr_reg(regnum, inbuffer, ptregs, info, ®, &freg, 1) ||
+ kgdb_ar_reg(regnum, ptregs, info, ®, 1)) ;
+ else if (regnum == IA64_IP_REGNUM)
+ ptregs->cr_iip = reg;
+ else if (regnum == IA64_CFM_REGNUM)
+ ptregs->cr_ifs = reg;
+ else if (regnum == IA64_PSR_REGNUM)
+ ptregs->cr_ipsr = reg;
+ else if (regnum == IA64_PR_REGNUM)
+ ptregs->pr = reg;
+ else
+ strcpy(outbuffer, "E01");
+ return;
+}
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+
+}
+
+#define MAX_HW_BREAKPOINT (20)
+long hw_break_total_dbr, hw_break_total_ibr;
+#define HW_BREAKPOINT (hw_break_total_dbr + hw_break_total_ibr)
+#define WATCH_INSTRUCTION 0x0
+#define WATCH_WRITE 0x1
+#define WATCH_READ 0x2
+#define WATCH_ACCESS 0x3
+
+#define HWCAP_DBR ((1 << WATCH_WRITE) | (1 << WATCH_READ))
+#define HWCAP_IBR (1 << WATCH_INSTRUCTION)
+struct hw_breakpoint {
+ unsigned enabled;
+ unsigned long capable;
+ unsigned long type;
+ unsigned long mask;
+ unsigned long addr;
+} *breakinfo;
+
+static struct hw_breakpoint hwbreaks[MAX_HW_BREAKPOINT];
+
+enum instruction_type { A, I, M, F, B, L, X, u };
+
+static enum instruction_type bundle_encoding[32][3] = {
+ {M, I, I}, /* 00 */
+ {M, I, I}, /* 01 */
+ {M, I, I}, /* 02 */
+ {M, I, I}, /* 03 */
+ {M, L, X}, /* 04 */
+ {M, L, X}, /* 05 */
+ {u, u, u}, /* 06 */
+ {u, u, u}, /* 07 */
+ {M, M, I}, /* 08 */
+ {M, M, I}, /* 09 */
+ {M, M, I}, /* 0A */
+ {M, M, I}, /* 0B */
+ {M, F, I}, /* 0C */
+ {M, F, I}, /* 0D */
+ {M, M, F}, /* 0E */
+ {M, M, F}, /* 0F */
+ {M, I, B}, /* 10 */
+ {M, I, B}, /* 11 */
+ {M, B, B}, /* 12 */
+ {M, B, B}, /* 13 */
+ {u, u, u}, /* 14 */
+ {u, u, u}, /* 15 */
+ {B, B, B}, /* 16 */
+ {B, B, B}, /* 17 */
+ {M, M, B}, /* 18 */
+ {M, M, B}, /* 19 */
+ {u, u, u}, /* 1A */
+ {u, u, u}, /* 1B */
+ {M, F, B}, /* 1C */
+ {M, F, B}, /* 1D */
+ {u, u, u}, /* 1E */
+ {u, u, u}, /* 1F */
+};
+
+int kgdb_validate_break_address(unsigned long addr)
+{
+ int error;
+ char tmp_variable[BREAK_INSTR_SIZE];
+ error = kgdb_get_mem((char *)(addr & BREAK_INSTR_ALIGN), tmp_variable,
+ BREAK_INSTR_SIZE);
+ return error;
+}
+
+int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
+{
+ extern unsigned long _start[];
+ unsigned long slot = addr & BREAK_INSTR_ALIGN, bundle_addr;
+ unsigned long template;
+ struct bundle {
+ struct {
+ unsigned long long template:5;
+ unsigned long long slot0:41;
+ unsigned long long slot1_p0:64 - 46;
+ } quad0;
+ struct {
+ unsigned long long slot1_p1:41 - (64 - 46);
+ unsigned long long slot2:41;
+ } quad1;
+ } bundle;
+ int ret;
+
+ bundle_addr = addr & ~0xFULL;
+
+ if (bundle_addr == (unsigned long)_start)
+ return 0;
+
+ ret = kgdb_get_mem((char *)bundle_addr, (char *)&bundle,
+ BREAK_INSTR_SIZE);
+ if (ret < 0)
+ return ret;
+
+ if (slot > 2)
+ slot = 0;
+
+ memcpy(saved_instr, &bundle, BREAK_INSTR_SIZE);
+ template = bundle.quad0.template;
+
+ if (slot == 1 && bundle_encoding[template][1] == L)
+ slot = 2;
+
+ switch (slot) {
+ case 0:
+ bundle.quad0.slot0 = BREAKNUM;
+ break;
+ case 1:
+ bundle.quad0.slot1_p0 = BREAKNUM;
+ bundle.quad1.slot1_p1 = (BREAKNUM >> (64 - 46));
+ break;
+ case 2:
+ bundle.quad1.slot2 = BREAKNUM;
+ break;
+ }
+
+ return kgdb_set_mem((char *)bundle_addr, (char *)&bundle,
+ BREAK_INSTR_SIZE);
+}
+
+int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
+{
+ extern unsigned long _start[];
+
+ addr = addr & BREAK_INSTR_ALIGN;
+ if (addr == (unsigned long)_start)
+ return 0;
+ return kgdb_set_mem((char *)addr, (char *)bundle, BREAK_INSTR_SIZE);
+}
+
+volatile static struct smp_unw {
+ struct unw_frame_info *unw;
+ struct task_struct *task;
+} smp_unw[NR_CPUS];
+
+static int inline kgdb_get_blocked_state(struct task_struct *p,
+ struct unw_frame_info *unw)
+{
+ unsigned long ip;
+ int count = 0;
+
+ unw_init_from_blocked_task(unw, p);
+ ip = 0UL;
+ do {
+ if (unw_unwind(unw) < 0)
+ return -1;
+ unw_get_ip(unw, &ip);
+ if (!in_sched_functions(ip))
+ break;
+ } while (count++ < 16);
+
+ if (!ip)
+ return -1;
+ else
+ return 0;
+}
+
+static void inline kgdb_wait(struct pt_regs *regs)
+{
+ unsigned long hw_breakpoint_status = ia64_getreg(_IA64_REG_PSR);
+ if (hw_breakpoint_status & IA64_PSR_DB)
+ ia64_setreg(_IA64_REG_PSR_L,
+ hw_breakpoint_status ^ IA64_PSR_DB);
+ kgdb_nmihook(smp_processor_id(), regs);
+ if (hw_breakpoint_status & IA64_PSR_DB)
+ ia64_setreg(_IA64_REG_PSR_L, hw_breakpoint_status);
+
+ return;
+}
+
+static void inline normalize(struct unw_frame_info *running,
+ struct pt_regs *regs)
+{
+ unsigned long sp;
+
+ do {
+ unw_get_sp(running, &sp);
+ if ((sp + 0x10) >= (unsigned long)regs)
+ break;
+ } while (unw_unwind(running) >= 0);
+
+ return;
+}
+
+static void kgdb_init_running(struct unw_frame_info *unw, void *data)
+{
+ struct pt_regs *regs;
+
+ regs = data;
+ normalize(unw, regs);
+ smp_unw[smp_processor_id()].unw = unw;
+ kgdb_wait(regs);
+}
+
+void kgdb_wait_ipi(struct pt_regs *regs)
+{
+ struct unw_frame_info unw;
+
+ smp_unw[smp_processor_id()].task = current;
+
+ if (user_mode(regs)) {
+ smp_unw[smp_processor_id()].unw = (struct unw_frame_info *)1;
+ kgdb_wait(regs);
+ } else {
+ if (current->state == TASK_RUNNING)
+ unw_init_running(kgdb_init_running, regs);
+ else {
+ if (kgdb_get_blocked_state(current, &unw))
+ smp_unw[smp_processor_id()].unw =
+ (struct unw_frame_info *)1;
+ else
+ smp_unw[smp_processor_id()].unw = &unw;
+ kgdb_wait(regs);
+ }
+ }
+
+ smp_unw[smp_processor_id()].unw = NULL;
+ return;
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ if (num_online_cpus() > 1)
+ smp_send_nmi_allbutself();
+}
+
+static volatile int kgdb_hwbreak_sstep[NR_CPUS];
+
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+ void *ptr)
+{
+ struct die_args *args = ptr;
+ struct pt_regs *regs = args->regs;
+ unsigned long err = args->err;
+
+ switch (cmd) {
+ default:
+ return NOTIFY_DONE;
+ case DIE_PAGE_FAULT_NO_CONTEXT:
+ if (atomic_read(&debugger_active) && kgdb_may_fault) {
+ kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+ return NOTIFY_STOP;
+ }
+ break;
+ case DIE_BREAK:
+ if (user_mode(regs) || err == 0x80001)
+ return NOTIFY_DONE;
+ break;
+ case DIE_FAULT:
+ if (user_mode(regs))
+ return NOTIFY_DONE;
+ else if (err == 36 && kgdb_hwbreak_sstep[smp_processor_id()]) {
+ kgdb_hwbreak_sstep[smp_processor_id()] = 0;
+ regs->cr_ipsr &= ~IA64_PSR_SS;
+ return NOTIFY_STOP;
+ }
+ case DIE_MCA_MONARCH_PROCESS:
+ case DIE_INIT_MONARCH_PROCESS:
+ break;
+ }
+
+ kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+ return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_notify,
+};
+
+int kgdb_arch_init(void)
+{
+ atomic_notifier_chain_register(&ia64die_chain, &kgdb_notifier);
+ return 0;
+}
+
+static void do_kgdb_handle_exception(struct unw_frame_info *, void *data);
+
+struct kgdb_state {
+ int e_vector;
+ int signo;
+ unsigned long err_code;
+ struct pt_regs *regs;
+ struct unw_frame_info *unw;
+ char *inbuf;
+ char *outbuf;
+ int unwind;
+ int ret;
+};
+
+static void inline kgdb_pc(struct pt_regs *regs, unsigned long pc)
+{
+ regs->cr_iip = pc & ~0xf;
+ ia64_psr(regs)->ri = pc & 0x3;
+ return;
+}
+
+int kgdb_arch_handle_exception(int e_vector, int signo,
+ int err_code, char *remcom_in_buffer,
+ char *remcom_out_buffer,
+ struct pt_regs *linux_regs)
+{
+ struct kgdb_state info;
+
+ info.e_vector = e_vector;
+ info.signo = signo;
+ info.err_code = err_code;
+ info.unw = (void *)0;
+ info.inbuf = remcom_in_buffer;
+ info.outbuf = remcom_out_buffer;
+ info.unwind = 0;
+ info.ret = -1;
+
+ if (remcom_in_buffer[0] == 'c' || remcom_in_buffer[0] == 's') {
+ info.regs = linux_regs;
+ do_kgdb_handle_exception(NULL, &info);
+ } else if (kgdb_usethread == current) {
+ info.regs = linux_regs;
+ info.unwind = 1;
+ unw_init_running(do_kgdb_handle_exception, &info);
+ } else if (kgdb_usethread->state != TASK_RUNNING) {
+ struct unw_frame_info unw_info;
+
+ if (kgdb_get_blocked_state(kgdb_usethread, &unw_info)) {
+ info.ret = 1;
+ goto bad;
+ }
+ info.regs = NULL;
+ do_kgdb_handle_exception(&unw_info, &info);
+ } else {
+ int i;
+
+ for (i = 0; i < NR_CPUS; i++)
+ if (smp_unw[i].task == kgdb_usethread && smp_unw[i].unw
+ && smp_unw[i].unw != (struct unw_frame_info *)1) {
+ info.regs = NULL;
+ do_kgdb_handle_exception(smp_unw[i].unw, &info);
+ break;
+ } else {
+ info.ret = 1;
+ goto bad;
+ }
+ }
+
+ bad:
+ if (info.ret != -1 && remcom_in_buffer[0] == 'p') {
+ unsigned long bad = 0xbad4badbadbadbadUL;
+
+ printk("kgdb_arch_handle_exception: p packet bad (%s)\n",
+ remcom_in_buffer);
+ kgdb_mem2hex((char *)&bad, remcom_out_buffer, sizeof(bad));
+ remcom_out_buffer[sizeof(bad) * 2] = 0;
+ info.ret = -1;
+ }
+ return info.ret;
+}
+
+/*
+ * This is done because I evidently made an incorrect 'p' encoding
+ * when my patch for gdb was committed. It was later corrected. This
+ * check supports both my wrong encoding of the register number and
+ * the correct encoding. Eventually this should be eliminated and
+ * kgdb_hex2long should be demarshalling the regnum.
+ */
+static inline int check_packet(unsigned int regnum, char *packet)
+{
+ static int check_done, swap;
+ unsigned long reglong;
+
+ if (likely(check_done)) {
+ if (swap) {
+ kgdb_hex2long(&packet, ®long);
+ regnum = (int) reglong;
+ }
+
+ } else {
+ if (regnum > NUM_REGS) {
+ kgdb_hex2long(&packet, ®long);
+ regnum = (int) reglong;
+ swap = 1;
+ }
+ check_done = 1;
+ }
+ return regnum;
+}
+
+static void do_kgdb_handle_exception(struct unw_frame_info *unw_info,
+ void *data)
+{
+ long addr;
+ char *ptr;
+ unsigned long newPC;
+ int e_vector, signo;
+ unsigned long err_code;
+ struct pt_regs *linux_regs;
+ struct kgdb_state *info;
+ char *remcom_in_buffer, *remcom_out_buffer;
+
+ info = data;
+ info->unw = unw_info;
+ e_vector = info->e_vector;
+ signo = info->signo;
+ err_code = info->err_code;
+ remcom_in_buffer = info->inbuf;
+ remcom_out_buffer = info->outbuf;
+ linux_regs = info->regs;
+
+ if (info->unwind)
+ normalize(unw_info, linux_regs);
+
+ switch (remcom_in_buffer[0]) {
+ case 'p':
+ {
+ unsigned int regnum;
+
+ kgdb_hex2mem(&remcom_in_buffer[1], (char *)®num,
+ sizeof(regnum));
+ regnum = check_packet(regnum, &remcom_in_buffer[1]);
+ if (regnum >= NUM_REGS) {
+ remcom_out_buffer[0] = 'E';
+ remcom_out_buffer[1] = 0;
+ } else
+ kgdb_get_reg(remcom_out_buffer, regnum,
+ unw_info, linux_regs);
+ break;
+ }
+ case 'P':
+ {
+ unsigned int regno;
+ long v;
+ char *ptr;
+
+ ptr = &remcom_in_buffer[1];
+ if ((!kgdb_usethread || kgdb_usethread == current) &&
+ kgdb_hex2long(&ptr, &v) &&
+ *ptr++ == '=' && (v >= 0)) {
+ regno = (unsigned int)v;
+ regno = (regno >= NUM_REGS ? 0 : regno);
+ kgdb_put_reg(ptr, remcom_out_buffer, regno,
+ unw_info, linux_regs);
+ } else
+ strcpy(remcom_out_buffer, "E01");
+ break;
+ }
+ case 'c':
+ case 's':
+ if (e_vector == TRAP_BRKPT && err_code == KGDBBREAKNUM) {
+ if (ia64_psr(linux_regs)->ri < 2)
+ kgdb_pc(linux_regs, linux_regs->cr_iip +
+ ia64_psr(linux_regs)->ri + 1);
+ else
+ kgdb_pc(linux_regs, linux_regs->cr_iip + 16);
+ }
+
+ /* try to read optional parameter, pc unchanged if no parm */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &addr)) {
+ linux_regs->cr_iip = addr;
+ }
+ newPC = linux_regs->cr_iip;
+
+ /* clear the trace bit */
+ linux_regs->cr_ipsr &= ~IA64_PSR_SS;
+
+ atomic_set(&cpu_doing_single_step, -1);
+
+ /* set the trace bit if we're stepping or took a hardware break */
+ if (remcom_in_buffer[0] == 's' || e_vector == TRAP_HWBKPT) {
+ linux_regs->cr_ipsr |= IA64_PSR_SS;
+ debugger_step = 1;
+ if (kgdb_contthread)
+ atomic_set(&cpu_doing_single_step,
+ smp_processor_id());
+ }
+
+ kgdb_correct_hw_break();
+
+ /* if not hardware breakpoint, then reenable them */
+ if (e_vector != TRAP_HWBKPT)
+ linux_regs->cr_ipsr |= IA64_PSR_DB;
+ else {
+ kgdb_hwbreak_sstep[smp_processor_id()] = 1;
+ linux_regs->cr_ipsr &= ~IA64_PSR_DB;
+ }
+
+ info->ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+ .gdb_bpt_instr = {0xcc},
+};
diff -Nurb linux-2.6.22-570/arch/ia64/kernel/smp.c linux-2.6.22-try2/arch/ia64/kernel/smp.c
--- linux-2.6.22-570/arch/ia64/kernel/smp.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/ia64/kernel/smp.c 2007-12-19 15:29:23.000000000 -0500
@@ -48,6 +48,7 @@
#include
#include
#include
+#include
/*
* Note: alignment of 4 entries/cacheline was empirically determined
@@ -79,6 +80,9 @@
#define IPI_CALL_FUNC 0
#define IPI_CPU_STOP 1
+#ifdef CONFIG_KGDB
+#define IPI_KGDB_INTERRUPT 2
+#endif
#define IPI_KDUMP_CPU_STOP 3
/* This needs to be cacheline aligned because it is written to by *other* CPUs. */
@@ -169,6 +173,11 @@
case IPI_CPU_STOP:
stop_this_cpu();
break;
+#ifdef CONFIG_KGDB
+ case IPI_KGDB_INTERRUPT:
+ kgdb_wait_ipi(get_irq_regs());
+ break;
+#endif
#ifdef CONFIG_KEXEC
case IPI_KDUMP_CPU_STOP:
unw_init_running(kdump_cpu_freeze, NULL);
@@ -399,6 +408,14 @@
}
EXPORT_SYMBOL(smp_call_function_single);
+#ifdef CONFIG_KGDB
+void
+smp_send_nmi_allbutself(void)
+{
+ send_IPI_allbutself(IPI_KGDB_INTERRUPT);
+}
+#endif
+
/*
* this function sends a 'generic call function' IPI to all other CPUs
* in the system.
diff -Nurb linux-2.6.22-570/arch/ia64/kernel/traps.c linux-2.6.22-try2/arch/ia64/kernel/traps.c
--- linux-2.6.22-570/arch/ia64/kernel/traps.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/ia64/kernel/traps.c 2007-12-19 15:29:23.000000000 -0500
@@ -155,8 +155,12 @@
break;
default:
- if (break_num < 0x40000 || break_num > 0x100000)
+ if (break_num < 0x40000 || break_num > 0x100000) {
+ if (notify_die(DIE_BREAK, "bad break", regs,
+ break_num, TRAP_BRKPT, SIGTRAP) == NOTIFY_STOP)
+ return;
die_if_kernel("Bad break", regs, break_num);
+ }
if (break_num < 0x80000) {
sig = SIGILL; code = __ILL_BREAK;
diff -Nurb linux-2.6.22-570/arch/ia64/mm/extable.c linux-2.6.22-try2/arch/ia64/mm/extable.c
--- linux-2.6.22-570/arch/ia64/mm/extable.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/ia64/mm/extable.c 2007-12-19 15:29:23.000000000 -0500
@@ -6,6 +6,7 @@
*/
#include
+#include
#include
#include
@@ -73,6 +74,11 @@
else
last = mid - 1;
}
+#ifdef CONFIG_KGDB
+ if (atomic_read(&debugger_active) && kgdb_may_fault)
+ kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+ /* Not reached. */
+#endif
return NULL;
}
diff -Nurb linux-2.6.22-570/arch/ia64/mm/fault.c linux-2.6.22-try2/arch/ia64/mm/fault.c
--- linux-2.6.22-570/arch/ia64/mm/fault.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/ia64/mm/fault.c 2007-12-19 15:29:23.000000000 -0500
@@ -255,6 +255,10 @@
*/
bust_spinlocks(1);
+ if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+ isr, 14, SIGSEGV) == NOTIFY_STOP)
+ return;
+
if (address < PAGE_SIZE)
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference (address %016lx)\n", address);
else
diff -Nurb linux-2.6.22-570/arch/mips/Kconfig linux-2.6.22-try2/arch/mips/Kconfig
--- linux-2.6.22-570/arch/mips/Kconfig 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/Kconfig 2007-12-19 15:29:23.000000000 -0500
@@ -30,7 +30,6 @@
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
help
The eXcite is a smart camera platform manufactured by
Basler Vision Technologies AG.
@@ -98,7 +97,6 @@
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
help
This is an evaluation board based on the Galileo GT-64120
single-chip system controller that contains a MIPS R5000 compatible
@@ -269,7 +267,6 @@
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
help
The Ocelot is a MIPS-based Single Board Computer (SBC) made by
Momentum Computer .
@@ -331,8 +328,6 @@
select SYS_HAS_CPU_R5432
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
- select SYS_SUPPORTS_KGDB
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This enables support for the R5432-based NEC DDB Vrc-5477,
@@ -360,7 +355,6 @@
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_SMP
help
Yosemite is an evaluation board for the RM9000x2 processor
@@ -440,7 +434,6 @@
select SYS_HAS_CPU_R10000
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_NUMA
select SYS_SUPPORTS_SMP
select GENERIC_HARDIRQS_NO__DO_IRQ
@@ -490,7 +483,6 @@
select SYS_HAS_CPU_SB1
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_SENTOSA
@@ -631,7 +623,6 @@
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select GENERIC_HARDIRQS_NO__DO_IRQ
help
This Toshiba board is based on the TX4927 processor. Say Y here to
@@ -650,7 +641,6 @@
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select GENERIC_HARDIRQS_NO__DO_IRQ
help
This Toshiba board is based on the TX4938 processor. Say Y here to
@@ -826,7 +816,6 @@
config DDB5XXX_COMMON
bool
- select SYS_SUPPORTS_KGDB
config MIPS_BOARDS_GEN
bool
@@ -862,7 +851,6 @@
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select GENERIC_HARDIRQS_NO__DO_IRQ
- select SYS_SUPPORTS_KGDB
config SWAP_IO_SPACE
bool
diff -Nurb linux-2.6.22-570/arch/mips/Kconfig.debug linux-2.6.22-try2/arch/mips/Kconfig.debug
--- linux-2.6.22-570/arch/mips/Kconfig.debug 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/Kconfig.debug 2007-12-19 15:29:23.000000000 -0500
@@ -46,28 +46,6 @@
arch/mips/kernel/smtc.c. This debugging option result in significant
overhead so should be disabled in production kernels.
-config KGDB
- bool "Remote GDB kernel debugging"
- depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB
- select DEBUG_INFO
- help
- If you say Y here, it will be possible to remotely debug the MIPS
- kernel using gdb. This enlarges your kernel image disk size by
- several megabytes and requires a machine with more than 16 MB,
- better 32 MB RAM to avoid excessive linking time. This is only
- useful for kernel hackers. If unsure, say N.
-
-config SYS_SUPPORTS_KGDB
- bool
-
-config GDB_CONSOLE
- bool "Console output to GDB"
- depends on KGDB
- help
- If you are using GDB for remote debugging over a serial port and
- would like kernel messages to be formatted into GDB $O packets so
- that GDB prints them as program output, say 'Y'.
-
config SB1XXX_CORELIS
bool "Corelis Debugger"
depends on SIBYTE_SB1xxx_SOC
diff -Nurb linux-2.6.22-570/arch/mips/au1000/common/Makefile linux-2.6.22-try2/arch/mips/au1000/common/Makefile
--- linux-2.6.22-570/arch/mips/au1000/common/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/au1000/common/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -10,5 +10,4 @@
au1xxx_irqmap.o clocks.o platform.o power.o setup.o \
sleeper.o cputable.o dma.o dbdma.o gpio.o
-obj-$(CONFIG_KGDB) += dbg_io.o
obj-$(CONFIG_PCI) += pci.o
diff -Nurb linux-2.6.22-570/arch/mips/au1000/common/dbg_io.c linux-2.6.22-try2/arch/mips/au1000/common/dbg_io.c
--- linux-2.6.22-570/arch/mips/au1000/common/dbg_io.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/au1000/common/dbg_io.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,121 +0,0 @@
-
-#include
-#include
-
-#ifdef CONFIG_KGDB
-
-/*
- * FIXME the user should be able to select the
- * uart to be used for debugging.
- */
-#define DEBUG_BASE UART_DEBUG_BASE
-/**/
-
-/* we need uint32 uint8 */
-/* #include "types.h" */
-typedef unsigned char uint8;
-typedef unsigned int uint32;
-
-#define UART16550_BAUD_2400 2400
-#define UART16550_BAUD_4800 4800
-#define UART16550_BAUD_9600 9600
-#define UART16550_BAUD_19200 19200
-#define UART16550_BAUD_38400 38400
-#define UART16550_BAUD_57600 57600
-#define UART16550_BAUD_115200 115200
-
-#define UART16550_PARITY_NONE 0
-#define UART16550_PARITY_ODD 0x08
-#define UART16550_PARITY_EVEN 0x18
-#define UART16550_PARITY_MARK 0x28
-#define UART16550_PARITY_SPACE 0x38
-
-#define UART16550_DATA_5BIT 0x0
-#define UART16550_DATA_6BIT 0x1
-#define UART16550_DATA_7BIT 0x2
-#define UART16550_DATA_8BIT 0x3
-
-#define UART16550_STOP_1BIT 0x0
-#define UART16550_STOP_2BIT 0x4
-
-
-#define UART_RX 0 /* Receive buffer */
-#define UART_TX 4 /* Transmit buffer */
-#define UART_IER 8 /* Interrupt Enable Register */
-#define UART_IIR 0xC /* Interrupt ID Register */
-#define UART_FCR 0x10 /* FIFO Control Register */
-#define UART_LCR 0x14 /* Line Control Register */
-#define UART_MCR 0x18 /* Modem Control Register */
-#define UART_LSR 0x1C /* Line Status Register */
-#define UART_MSR 0x20 /* Modem Status Register */
-#define UART_CLK 0x28 /* Baud Rat4e Clock Divider */
-#define UART_MOD_CNTRL 0x100 /* Module Control */
-
-/* memory-mapped read/write of the port */
-#define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff)
-#define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y))
-
-extern unsigned long get_au1x00_uart_baud_base(void);
-extern unsigned long cal_r4koff(void);
-
-void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
-{
-
- if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
- UART16550_WRITE(UART_MOD_CNTRL, 3);
- }
- cal_r4koff();
-
- /* disable interrupts */
- UART16550_WRITE(UART_IER, 0);
-
- /* set up baud rate */
- {
- uint32 divisor;
-
- /* set divisor */
- divisor = get_au1x00_uart_baud_base() / baud;
- UART16550_WRITE(UART_CLK, divisor & 0xffff);
- }
-
- /* set data format */
- UART16550_WRITE(UART_LCR, (data | parity | stop));
-}
-
-static int remoteDebugInitialized = 0;
-
-uint8 getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE,
- UART16550_STOP_1BIT);
- }
-
- while((UART16550_READ(UART_LSR) & 0x1) == 0);
- return UART16550_READ(UART_RX);
-}
-
-
-int putDebugChar(uint8 byte)
-{
-// int i;
-
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE,
- UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(UART_LSR)&0x40) == 0);
- UART16550_WRITE(UART_TX, byte);
- //for (i=0;i<0xfff;i++);
-
- return 1;
-}
-
-#endif
diff -Nurb linux-2.6.22-570/arch/mips/basler/excite/Makefile linux-2.6.22-try2/arch/mips/basler/excite/Makefile
--- linux-2.6.22-570/arch/mips/basler/excite/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/basler/excite/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -5,5 +5,4 @@
obj-$(CONFIG_BASLER_EXCITE) += excite_irq.o excite_prom.o excite_setup.o \
excite_device.o excite_procfs.o
-obj-$(CONFIG_KGDB) += excite_dbg_io.o
obj-m += excite_iodev.o
diff -Nurb linux-2.6.22-570/arch/mips/basler/excite/excite_dbg_io.c linux-2.6.22-try2/arch/mips/basler/excite/excite_dbg_io.c
--- linux-2.6.22-570/arch/mips/basler/excite/excite_dbg_io.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/basler/excite/excite_dbg_io.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,121 +0,0 @@
-/*
- * Copyright (C) 2004 by Basler Vision Technologies AG
- * Author: Thomas Koeller
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include
-#include
-#include
-#include
-#include
-#include
-
-#if defined(CONFIG_SERIAL_8250) && CONFIG_SERIAL_8250_NR_UARTS > 1
-#error Debug port used by serial driver
-#endif
-
-#define UART_CLK 25000000
-#define BASE_BAUD (UART_CLK / 16)
-#define REGISTER_BASE_0 0x0208UL
-#define REGISTER_BASE_1 0x0238UL
-
-#define REGISTER_BASE_DBG REGISTER_BASE_1
-
-#define CPRR 0x0004
-#define UACFG 0x0200
-#define UAINTS 0x0204
-#define UARBR (REGISTER_BASE_DBG + 0x0000)
-#define UATHR (REGISTER_BASE_DBG + 0x0004)
-#define UADLL (REGISTER_BASE_DBG + 0x0008)
-#define UAIER (REGISTER_BASE_DBG + 0x000c)
-#define UADLH (REGISTER_BASE_DBG + 0x0010)
-#define UAIIR (REGISTER_BASE_DBG + 0x0014)
-#define UAFCR (REGISTER_BASE_DBG + 0x0018)
-#define UALCR (REGISTER_BASE_DBG + 0x001c)
-#define UAMCR (REGISTER_BASE_DBG + 0x0020)
-#define UALSR (REGISTER_BASE_DBG + 0x0024)
-#define UAMSR (REGISTER_BASE_DBG + 0x0028)
-#define UASCR (REGISTER_BASE_DBG + 0x002c)
-
-#define PARITY_NONE 0
-#define PARITY_ODD 0x08
-#define PARITY_EVEN 0x18
-#define PARITY_MARK 0x28
-#define PARITY_SPACE 0x38
-
-#define DATA_5BIT 0x0
-#define DATA_6BIT 0x1
-#define DATA_7BIT 0x2
-#define DATA_8BIT 0x3
-
-#define STOP_1BIT 0x0
-#define STOP_2BIT 0x4
-
-#define BAUD_DBG 57600
-#define PARITY_DBG PARITY_NONE
-#define DATA_DBG DATA_8BIT
-#define STOP_DBG STOP_1BIT
-
-/* Initialize the serial port for KGDB debugging */
-void __init excite_kgdb_init(void)
-{
- const u32 divisor = BASE_BAUD / BAUD_DBG;
-
- /* Take the UART out of reset */
- titan_writel(0x00ff1cff, CPRR);
- titan_writel(0x00000000, UACFG);
- titan_writel(0x00000002, UACFG);
-
- titan_writel(0x0, UALCR);
- titan_writel(0x0, UAIER);
-
- /* Disable FIFOs */
- titan_writel(0x00, UAFCR);
-
- titan_writel(0x80, UALCR);
- titan_writel(divisor & 0xff, UADLL);
- titan_writel((divisor & 0xff00) >> 8, UADLH);
- titan_writel(0x0, UALCR);
-
- titan_writel(DATA_DBG | PARITY_DBG | STOP_DBG, UALCR);
-
- /* Enable receiver interrupt */
- titan_readl(UARBR);
- titan_writel(0x1, UAIER);
-}
-
-int getDebugChar(void)
-{
- while (!(titan_readl(UALSR) & 0x1));
- return titan_readl(UARBR);
-}
-
-int putDebugChar(int data)
-{
- while (!(titan_readl(UALSR) & 0x20));
- titan_writel(data, UATHR);
- return 1;
-}
-
-/* KGDB interrupt handler */
-asmlinkage void excite_kgdb_inthdl(void)
-{
- if (unlikely(
- ((titan_readl(UAIIR) & 0x7) == 4)
- && ((titan_readl(UARBR) & 0xff) == 0x3)))
- set_async_breakpoint(®s->cp0_epc);
-}
diff -Nurb linux-2.6.22-570/arch/mips/basler/excite/excite_irq.c linux-2.6.22-try2/arch/mips/basler/excite/excite_irq.c
--- linux-2.6.22-570/arch/mips/basler/excite/excite_irq.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/basler/excite/excite_irq.c 2007-12-19 15:29:23.000000000 -0500
@@ -50,10 +50,6 @@
mips_cpu_irq_init();
rm7k_cpu_irq_init();
rm9k_cpu_irq_init();
-
-#ifdef CONFIG_KGDB
- excite_kgdb_init();
-#endif
}
asmlinkage void plat_irq_dispatch(void)
@@ -90,9 +86,6 @@
msgint = msgintflags & msgintmask & (0x1 << (TITAN_MSGINT % 0x20));
if ((pending & (1 << TITAN_IRQ)) && msgint) {
ocd_writel(msgint, INTP0Clear0 + (TITAN_MSGINT / 0x20 * 0x10));
-#if defined(CONFIG_KGDB)
- excite_kgdb_inthdl();
-#endif
do_IRQ(TITAN_IRQ);
return;
}
diff -Nurb linux-2.6.22-570/arch/mips/basler/excite/excite_setup.c linux-2.6.22-try2/arch/mips/basler/excite/excite_setup.c
--- linux-2.6.22-570/arch/mips/basler/excite/excite_setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/basler/excite/excite_setup.c 2007-12-19 15:29:23.000000000 -0500
@@ -95,13 +95,13 @@
/* Take the DUART out of reset */
titan_writel(0x00ff1cff, CPRR);
-#if defined(CONFIG_KGDB) || (CONFIG_SERIAL_8250_NR_UARTS > 1)
+#if (CONFIG_SERIAL_8250_NR_UARTS > 1)
/* Enable both ports */
titan_writel(MASK_SER0 | MASK_SER1, UACFG);
#else
/* Enable port #0 only */
titan_writel(MASK_SER0, UACFG);
-#endif /* defined(CONFIG_KGDB) */
+#endif
/*
* Set up serial port #0. Do not use autodetection; the result is
diff -Nurb linux-2.6.22-570/arch/mips/ddb5xxx/ddb5477/Makefile linux-2.6.22-try2/arch/mips/ddb5xxx/ddb5477/Makefile
--- linux-2.6.22-570/arch/mips/ddb5xxx/ddb5477/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/ddb5xxx/ddb5477/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -5,4 +5,3 @@
obj-y += irq.o irq_5477.o setup.o lcd44780.o
obj-$(CONFIG_RUNTIME_DEBUG) += debug.o
-obj-$(CONFIG_KGDB) += kgdb_io.o
diff -Nurb linux-2.6.22-570/arch/mips/ddb5xxx/ddb5477/kgdb_io.c linux-2.6.22-try2/arch/mips/ddb5xxx/ddb5477/kgdb_io.c
--- linux-2.6.22-570/arch/mips/ddb5xxx/ddb5477/kgdb_io.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/ddb5xxx/ddb5477/kgdb_io.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,136 +0,0 @@
-/*
- * kgdb io functions for DDB5477. We use the second serial port (upper one).
- *
- * Copyright (C) 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-/* ======================= CONFIG ======================== */
-
-/* [jsun] we use the second serial port for kdb */
-#define BASE 0xbfa04240
-#define MAX_BAUD 115200
-
-/* distance in bytes between two serial registers */
-#define REG_OFFSET 8
-
-/*
- * 0 - kgdb does serial init
- * 1 - kgdb skip serial init
- */
-static int remoteDebugInitialized = 0;
-
-/*
- * the default baud rate *if* kgdb does serial init
- */
-#define BAUD_DEFAULT UART16550_BAUD_38400
-
-/* ======================= END OF CONFIG ======================== */
-
-typedef unsigned char uint8;
-typedef unsigned int uint32;
-
-#define UART16550_BAUD_2400 2400
-#define UART16550_BAUD_4800 4800
-#define UART16550_BAUD_9600 9600
-#define UART16550_BAUD_19200 19200
-#define UART16550_BAUD_38400 38400
-#define UART16550_BAUD_57600 57600
-#define UART16550_BAUD_115200 115200
-
-#define UART16550_PARITY_NONE 0
-#define UART16550_PARITY_ODD 0x08
-#define UART16550_PARITY_EVEN 0x18
-#define UART16550_PARITY_MARK 0x28
-#define UART16550_PARITY_SPACE 0x38
-
-#define UART16550_DATA_5BIT 0x0
-#define UART16550_DATA_6BIT 0x1
-#define UART16550_DATA_7BIT 0x2
-#define UART16550_DATA_8BIT 0x3
-
-#define UART16550_STOP_1BIT 0x0
-#define UART16550_STOP_2BIT 0x4
-
-/* register offset */
-#define OFS_RCV_BUFFER 0
-#define OFS_TRANS_HOLD 0
-#define OFS_SEND_BUFFER 0
-#define OFS_INTR_ENABLE (1*REG_OFFSET)
-#define OFS_INTR_ID (2*REG_OFFSET)
-#define OFS_DATA_FORMAT (3*REG_OFFSET)
-#define OFS_LINE_CONTROL (3*REG_OFFSET)
-#define OFS_MODEM_CONTROL (4*REG_OFFSET)
-#define OFS_RS232_OUTPUT (4*REG_OFFSET)
-#define OFS_LINE_STATUS (5*REG_OFFSET)
-#define OFS_MODEM_STATUS (6*REG_OFFSET)
-#define OFS_RS232_INPUT (6*REG_OFFSET)
-#define OFS_SCRATCH_PAD (7*REG_OFFSET)
-
-#define OFS_DIVISOR_LSB (0*REG_OFFSET)
-#define OFS_DIVISOR_MSB (1*REG_OFFSET)
-
-
-/* memory-mapped read/write of the port */
-#define UART16550_READ(y) (*((volatile uint8*)(BASE + y)))
-#define UART16550_WRITE(y, z) ((*((volatile uint8*)(BASE + y))) = z)
-
-void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
-{
- /* disable interrupts */
- UART16550_WRITE(OFS_INTR_ENABLE, 0);
-
- /* set up baud rate */
- {
- uint32 divisor;
-
- /* set DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
-
- /* set divisor */
- divisor = MAX_BAUD / baud;
- UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
- UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
-
- /* clear DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
- }
-
- /* set data format */
- UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
-}
-
-
-uint8 getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(BAUD_DEFAULT,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
- return UART16550_READ(OFS_RCV_BUFFER);
-}
-
-
-int putDebugChar(uint8 byte)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(BAUD_DEFAULT,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
- UART16550_WRITE(OFS_SEND_BUFFER, byte);
- return 1;
-}
diff -Nurb linux-2.6.22-570/arch/mips/gt64120/momenco_ocelot/Makefile linux-2.6.22-try2/arch/mips/gt64120/momenco_ocelot/Makefile
--- linux-2.6.22-570/arch/mips/gt64120/momenco_ocelot/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/gt64120/momenco_ocelot/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -3,5 +3,3 @@
#
obj-y += irq.o prom.o reset.o setup.o
-
-obj-$(CONFIG_KGDB) += dbg_io.o
diff -Nurb linux-2.6.22-570/arch/mips/gt64120/momenco_ocelot/dbg_io.c linux-2.6.22-try2/arch/mips/gt64120/momenco_ocelot/dbg_io.c
--- linux-2.6.22-570/arch/mips/gt64120/momenco_ocelot/dbg_io.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/gt64120/momenco_ocelot/dbg_io.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,121 +0,0 @@
-
-#include /* For the serial port location and base baud */
-
-/* --- CONFIG --- */
-
-typedef unsigned char uint8;
-typedef unsigned int uint32;
-
-/* --- END OF CONFIG --- */
-
-#define UART16550_BAUD_2400 2400
-#define UART16550_BAUD_4800 4800
-#define UART16550_BAUD_9600 9600
-#define UART16550_BAUD_19200 19200
-#define UART16550_BAUD_38400 38400
-#define UART16550_BAUD_57600 57600
-#define UART16550_BAUD_115200 115200
-
-#define UART16550_PARITY_NONE 0
-#define UART16550_PARITY_ODD 0x08
-#define UART16550_PARITY_EVEN 0x18
-#define UART16550_PARITY_MARK 0x28
-#define UART16550_PARITY_SPACE 0x38
-
-#define UART16550_DATA_5BIT 0x0
-#define UART16550_DATA_6BIT 0x1
-#define UART16550_DATA_7BIT 0x2
-#define UART16550_DATA_8BIT 0x3
-
-#define UART16550_STOP_1BIT 0x0
-#define UART16550_STOP_2BIT 0x4
-
-/* ----------------------------------------------------- */
-
-/* === CONFIG === */
-
-/* [jsun] we use the second serial port for kdb */
-#define BASE OCELOT_SERIAL1_BASE
-#define MAX_BAUD OCELOT_BASE_BAUD
-
-/* === END OF CONFIG === */
-
-#define REG_OFFSET 4
-
-/* register offset */
-#define OFS_RCV_BUFFER 0
-#define OFS_TRANS_HOLD 0
-#define OFS_SEND_BUFFER 0
-#define OFS_INTR_ENABLE (1*REG_OFFSET)
-#define OFS_INTR_ID (2*REG_OFFSET)
-#define OFS_DATA_FORMAT (3*REG_OFFSET)
-#define OFS_LINE_CONTROL (3*REG_OFFSET)
-#define OFS_MODEM_CONTROL (4*REG_OFFSET)
-#define OFS_RS232_OUTPUT (4*REG_OFFSET)
-#define OFS_LINE_STATUS (5*REG_OFFSET)
-#define OFS_MODEM_STATUS (6*REG_OFFSET)
-#define OFS_RS232_INPUT (6*REG_OFFSET)
-#define OFS_SCRATCH_PAD (7*REG_OFFSET)
-
-#define OFS_DIVISOR_LSB (0*REG_OFFSET)
-#define OFS_DIVISOR_MSB (1*REG_OFFSET)
-
-
-/* memory-mapped read/write of the port */
-#define UART16550_READ(y) (*((volatile uint8*)(BASE + y)))
-#define UART16550_WRITE(y, z) ((*((volatile uint8*)(BASE + y))) = z)
-
-void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
-{
- /* disable interrupts */
- UART16550_WRITE(OFS_INTR_ENABLE, 0);
-
- /* set up baud rate */
- {
- uint32 divisor;
-
- /* set DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
-
- /* set divisor */
- divisor = MAX_BAUD / baud;
- UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
- UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
-
- /* clear DIAB bit */
- UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
- }
-
- /* set data format */
- UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
-}
-
-static int remoteDebugInitialized = 0;
-
-uint8 getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_38400,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
- return UART16550_READ(OFS_RCV_BUFFER);
-}
-
-
-int putDebugChar(uint8 byte)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_38400,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE, UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
- UART16550_WRITE(OFS_SEND_BUFFER, byte);
- return 1;
-}
diff -Nurb linux-2.6.22-570/arch/mips/jmr3927/rbhma3100/Makefile linux-2.6.22-try2/arch/mips/jmr3927/rbhma3100/Makefile
--- linux-2.6.22-570/arch/mips/jmr3927/rbhma3100/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/jmr3927/rbhma3100/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -3,4 +3,3 @@
#
obj-y += init.o irq.o setup.o
-obj-$(CONFIG_KGDB) += kgdb_io.o
diff -Nurb linux-2.6.22-570/arch/mips/jmr3927/rbhma3100/kgdb_io.c linux-2.6.22-try2/arch/mips/jmr3927/rbhma3100/kgdb_io.c
--- linux-2.6.22-570/arch/mips/jmr3927/rbhma3100/kgdb_io.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/jmr3927/rbhma3100/kgdb_io.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,105 +0,0 @@
-/*
- * BRIEF MODULE DESCRIPTION
- * Low level uart routines to directly access a TX[34]927 SIO.
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ahennessy@mvista.com or source@mvista.com
- *
- * Based on arch/mips/ddb5xxx/ddb5477/kgdb_io.c
- *
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include
-
-#define TIMEOUT 0xffffff
-
-static int remoteDebugInitialized = 0;
-static void debugInit(int baud);
-
-int putDebugChar(unsigned char c)
-{
- int i = 0;
-
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(38400);
- }
-
- do {
- slow_down();
- i++;
- if (i>TIMEOUT) {
- break;
- }
- } while (!(tx3927_sioptr(0)->cisr & TXx927_SICISR_TXALS));
- tx3927_sioptr(0)->tfifo = c;
-
- return 1;
-}
-
-unsigned char getDebugChar(void)
-{
- int i = 0;
- int dicr;
- char c;
-
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(38400);
- }
-
- /* diable RX int. */
- dicr = tx3927_sioptr(0)->dicr;
- tx3927_sioptr(0)->dicr = 0;
-
- do {
- slow_down();
- i++;
- if (i>TIMEOUT) {
- break;
- }
- } while (tx3927_sioptr(0)->disr & TXx927_SIDISR_UVALID)
- ;
- c = tx3927_sioptr(0)->rfifo;
-
- /* clear RX int. status */
- tx3927_sioptr(0)->disr &= ~TXx927_SIDISR_RDIS;
- /* enable RX int. */
- tx3927_sioptr(0)->dicr = dicr;
-
- return c;
-}
-
-static void debugInit(int baud)
-{
- tx3927_sioptr(0)->lcr = 0x020;
- tx3927_sioptr(0)->dicr = 0;
- tx3927_sioptr(0)->disr = 0x4100;
- tx3927_sioptr(0)->cisr = 0x014;
- tx3927_sioptr(0)->fcr = 0;
- tx3927_sioptr(0)->flcr = 0x02;
- tx3927_sioptr(0)->bgr = ((JMR3927_BASE_BAUD + baud / 2) / baud) |
- TXx927_SIBGR_BCLK_T0;
-}
diff -Nurb linux-2.6.22-570/arch/mips/kernel/Makefile linux-2.6.22-try2/arch/mips/kernel/Makefile
--- linux-2.6.22-570/arch/mips/kernel/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/kernel/Makefile 2007-12-19 15:29:23.000000000 -0500
@@ -57,7 +57,8 @@
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
-obj-$(CONFIG_KGDB) += gdb-low.o gdb-stub.o
+obj-$(CONFIG_KGDB) += kgdb_handler.o kgdb.o kgdb-jmp.o \
+ kgdb-setjmp.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_64BIT) += cpu-bugs64.o
diff -Nurb linux-2.6.22-570/arch/mips/kernel/cpu-probe.c linux-2.6.22-try2/arch/mips/kernel/cpu-probe.c
--- linux-2.6.22-570/arch/mips/kernel/cpu-probe.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/kernel/cpu-probe.c 2007-12-19 15:28:56.000000000 -0500
@@ -177,6 +177,17 @@
cpu_wait = r4k_wait;
break;
+ case CPU_20KC:
+ /*
+ * WAIT on Rev1.0 has E1, E2, E3 and E16.
+ * WAIT on Rev2.0 and Rev3.0 has E16.
+ * Rev3.1 WAIT is nop, why bother
+ */
+ if ((c->processor_id & 0xff) <= 0x64)
+ break;
+
+ cpu_wait = r4k_wait;
+ break;
case CPU_RM9000:
if ((c->processor_id & 0x00ff) >= 0x40)
cpu_wait = r4k_wait;
diff -Nurb linux-2.6.22-570/arch/mips/kernel/gdb-low.S linux-2.6.22-try2/arch/mips/kernel/gdb-low.S
--- linux-2.6.22-570/arch/mips/kernel/gdb-low.S 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/kernel/gdb-low.S 1969-12-31 19:00:00.000000000 -0500
@@ -1,394 +0,0 @@
-/*
- * gdb-low.S contains the low-level trap handler for the GDB stub.
- *
- * Copyright (C) 1995 Andreas Busse
- */
-#include
-
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-#ifdef CONFIG_32BIT
-#define DMFC0 mfc0
-#define DMTC0 mtc0
-#define LDC1 lwc1
-#define SDC1 lwc1
-#endif
-#ifdef CONFIG_64BIT
-#define DMFC0 dmfc0
-#define DMTC0 dmtc0
-#define LDC1 ldc1
-#define SDC1 ldc1
-#endif
-
-/*
- * [jsun] We reserves about 2x GDB_FR_SIZE in stack. The lower (addressed)
- * part is used to store registers and passed to exception handler.
- * The upper part is reserved for "call func" feature where gdb client
- * saves some of the regs, setups call frame and passes args.
- *
- * A trace shows about 200 bytes are used to store about half of all regs.
- * The rest should be big enough for frame setup and passing args.
- */
-
-/*
- * The low level trap handler
- */
- .align 5
- NESTED(trap_low, GDB_FR_SIZE, sp)
- .set noat
- .set noreorder
-
- mfc0 k0, CP0_STATUS
- sll k0, 3 /* extract cu0 bit */
- bltz k0, 1f
- move k1, sp
-
- /*
- * Called from user mode, go somewhere else.
- */
- mfc0 k0, CP0_CAUSE
- andi k0, k0, 0x7c
-#ifdef CONFIG_64BIT
- dsll k0, k0, 1
-#endif
- PTR_L k1, saved_vectors(k0)
- jr k1
- nop
-1:
- move k0, sp
- PTR_SUBU sp, k1, GDB_FR_SIZE*2 # see comment above
- LONG_S k0, GDB_FR_REG29(sp)
- LONG_S $2, GDB_FR_REG2(sp)
-
-/*
- * First save the CP0 and special registers
- */
-
- mfc0 v0, CP0_STATUS
- LONG_S v0, GDB_FR_STATUS(sp)
- mfc0 v0, CP0_CAUSE
- LONG_S v0, GDB_FR_CAUSE(sp)
- DMFC0 v0, CP0_EPC
- LONG_S v0, GDB_FR_EPC(sp)
- DMFC0 v0, CP0_BADVADDR
- LONG_S v0, GDB_FR_BADVADDR(sp)
- mfhi v0
- LONG_S v0, GDB_FR_HI(sp)
- mflo v0
- LONG_S v0, GDB_FR_LO(sp)
-
-/*
- * Now the integer registers
- */
-
- LONG_S zero, GDB_FR_REG0(sp) /* I know... */
- LONG_S $1, GDB_FR_REG1(sp)
- /* v0 already saved */
- LONG_S $3, GDB_FR_REG3(sp)
- LONG_S $4, GDB_FR_REG4(sp)
- LONG_S $5, GDB_FR_REG5(sp)
- LONG_S $6, GDB_FR_REG6(sp)
- LONG_S $7, GDB_FR_REG7(sp)
- LONG_S $8, GDB_FR_REG8(sp)
- LONG_S $9, GDB_FR_REG9(sp)
- LONG_S $10, GDB_FR_REG10(sp)
- LONG_S $11, GDB_FR_REG11(sp)
- LONG_S $12, GDB_FR_REG12(sp)
- LONG_S $13, GDB_FR_REG13(sp)
- LONG_S $14, GDB_FR_REG14(sp)
- LONG_S $15, GDB_FR_REG15(sp)
- LONG_S $16, GDB_FR_REG16(sp)
- LONG_S $17, GDB_FR_REG17(sp)
- LONG_S $18, GDB_FR_REG18(sp)
- LONG_S $19, GDB_FR_REG19(sp)
- LONG_S $20, GDB_FR_REG20(sp)
- LONG_S $21, GDB_FR_REG21(sp)
- LONG_S $22, GDB_FR_REG22(sp)
- LONG_S $23, GDB_FR_REG23(sp)
- LONG_S $24, GDB_FR_REG24(sp)
- LONG_S $25, GDB_FR_REG25(sp)
- LONG_S $26, GDB_FR_REG26(sp)
- LONG_S $27, GDB_FR_REG27(sp)
- LONG_S $28, GDB_FR_REG28(sp)
- /* sp already saved */
- LONG_S $30, GDB_FR_REG30(sp)
- LONG_S $31, GDB_FR_REG31(sp)
-
- CLI /* disable interrupts */
- TRACE_IRQS_OFF
-
-/*
- * Followed by the floating point registers
- */
- mfc0 v0, CP0_STATUS /* FPU enabled? */
- srl v0, v0, 16
- andi v0, v0, (ST0_CU1 >> 16)
-
- beqz v0,2f /* disabled, skip */
- nop
-
- SDC1 $0, GDB_FR_FPR0(sp)
- SDC1 $1, GDB_FR_FPR1(sp)
- SDC1 $2, GDB_FR_FPR2(sp)
- SDC1 $3, GDB_FR_FPR3(sp)
- SDC1 $4, GDB_FR_FPR4(sp)
- SDC1 $5, GDB_FR_FPR5(sp)
- SDC1 $6, GDB_FR_FPR6(sp)
- SDC1 $7, GDB_FR_FPR7(sp)
- SDC1 $8, GDB_FR_FPR8(sp)
- SDC1 $9, GDB_FR_FPR9(sp)
- SDC1 $10, GDB_FR_FPR10(sp)
- SDC1 $11, GDB_FR_FPR11(sp)
- SDC1 $12, GDB_FR_FPR12(sp)
- SDC1 $13, GDB_FR_FPR13(sp)
- SDC1 $14, GDB_FR_FPR14(sp)
- SDC1 $15, GDB_FR_FPR15(sp)
- SDC1 $16, GDB_FR_FPR16(sp)
- SDC1 $17, GDB_FR_FPR17(sp)
- SDC1 $18, GDB_FR_FPR18(sp)
- SDC1 $19, GDB_FR_FPR19(sp)
- SDC1 $20, GDB_FR_FPR20(sp)
- SDC1 $21, GDB_FR_FPR21(sp)
- SDC1 $22, GDB_FR_FPR22(sp)
- SDC1 $23, GDB_FR_FPR23(sp)
- SDC1 $24, GDB_FR_FPR24(sp)
- SDC1 $25, GDB_FR_FPR25(sp)
- SDC1 $26, GDB_FR_FPR26(sp)
- SDC1 $27, GDB_FR_FPR27(sp)
- SDC1 $28, GDB_FR_FPR28(sp)
- SDC1 $29, GDB_FR_FPR29(sp)
- SDC1 $30, GDB_FR_FPR30(sp)
- SDC1 $31, GDB_FR_FPR31(sp)
-
-/*
- * FPU control registers
- */
-
- cfc1 v0, CP1_STATUS
- LONG_S v0, GDB_FR_FSR(sp)
- cfc1 v0, CP1_REVISION
- LONG_S v0, GDB_FR_FIR(sp)
-
-/*
- * Current stack frame ptr
- */
-
-2:
- LONG_S sp, GDB_FR_FRP(sp)
-
-/*
- * CP0 registers (R4000/R4400 unused registers skipped)
- */
-
- mfc0 v0, CP0_INDEX
- LONG_S v0, GDB_FR_CP0_INDEX(sp)
- mfc0 v0, CP0_RANDOM
- LONG_S v0, GDB_FR_CP0_RANDOM(sp)
- DMFC0 v0, CP0_ENTRYLO0
- LONG_S v0, GDB_FR_CP0_ENTRYLO0(sp)
- DMFC0 v0, CP0_ENTRYLO1
- LONG_S v0, GDB_FR_CP0_ENTRYLO1(sp)
- DMFC0 v0, CP0_CONTEXT
- LONG_S v0, GDB_FR_CP0_CONTEXT(sp)
- mfc0 v0, CP0_PAGEMASK
- LONG_S v0, GDB_FR_CP0_PAGEMASK(sp)
- mfc0 v0, CP0_WIRED
- LONG_S v0, GDB_FR_CP0_WIRED(sp)
- DMFC0 v0, CP0_ENTRYHI
- LONG_S v0, GDB_FR_CP0_ENTRYHI(sp)
- mfc0 v0, CP0_PRID
- LONG_S v0, GDB_FR_CP0_PRID(sp)
-
- .set at
-
-/*
- * Continue with the higher level handler
- */
-
- move a0,sp
-
- jal handle_exception
- nop
-
-/*
- * Restore all writable registers, in reverse order
- */
-
- .set noat
-
- LONG_L v0, GDB_FR_CP0_ENTRYHI(sp)
- LONG_L v1, GDB_FR_CP0_WIRED(sp)
- DMTC0 v0, CP0_ENTRYHI
- mtc0 v1, CP0_WIRED
- LONG_L v0, GDB_FR_CP0_PAGEMASK(sp)
- LONG_L v1, GDB_FR_CP0_ENTRYLO1(sp)
- mtc0 v0, CP0_PAGEMASK
- DMTC0 v1, CP0_ENTRYLO1
- LONG_L v0, GDB_FR_CP0_ENTRYLO0(sp)
- LONG_L v1, GDB_FR_CP0_INDEX(sp)
- DMTC0 v0, CP0_ENTRYLO0
- LONG_L v0, GDB_FR_CP0_CONTEXT(sp)
- mtc0 v1, CP0_INDEX
- DMTC0 v0, CP0_CONTEXT
-
-
-/*
- * Next, the floating point registers
- */
- mfc0 v0, CP0_STATUS /* check if the FPU is enabled */
- srl v0, v0, 16
- andi v0, v0, (ST0_CU1 >> 16)
-
- beqz v0, 3f /* disabled, skip */
- nop
-
- LDC1 $31, GDB_FR_FPR31(sp)
- LDC1 $30, GDB_FR_FPR30(sp)
- LDC1 $29, GDB_FR_FPR29(sp)
- LDC1 $28, GDB_FR_FPR28(sp)
- LDC1 $27, GDB_FR_FPR27(sp)
- LDC1 $26, GDB_FR_FPR26(sp)
- LDC1 $25, GDB_FR_FPR25(sp)
- LDC1 $24, GDB_FR_FPR24(sp)
- LDC1 $23, GDB_FR_FPR23(sp)
- LDC1 $22, GDB_FR_FPR22(sp)
- LDC1 $21, GDB_FR_FPR21(sp)
- LDC1 $20, GDB_FR_FPR20(sp)
- LDC1 $19, GDB_FR_FPR19(sp)
- LDC1 $18, GDB_FR_FPR18(sp)
- LDC1 $17, GDB_FR_FPR17(sp)
- LDC1 $16, GDB_FR_FPR16(sp)
- LDC1 $15, GDB_FR_FPR15(sp)
- LDC1 $14, GDB_FR_FPR14(sp)
- LDC1 $13, GDB_FR_FPR13(sp)
- LDC1 $12, GDB_FR_FPR12(sp)
- LDC1 $11, GDB_FR_FPR11(sp)
- LDC1 $10, GDB_FR_FPR10(sp)
- LDC1 $9, GDB_FR_FPR9(sp)
- LDC1 $8, GDB_FR_FPR8(sp)
- LDC1 $7, GDB_FR_FPR7(sp)
- LDC1 $6, GDB_FR_FPR6(sp)
- LDC1 $5, GDB_FR_FPR5(sp)
- LDC1 $4, GDB_FR_FPR4(sp)
- LDC1 $3, GDB_FR_FPR3(sp)
- LDC1 $2, GDB_FR_FPR2(sp)
- LDC1 $1, GDB_FR_FPR1(sp)
- LDC1 $0, GDB_FR_FPR0(sp)
-
-/*
- * Now the CP0 and integer registers
- */
-
-3:
-#ifdef CONFIG_MIPS_MT_SMTC
- /* Read-modify write of Status must be atomic */
- mfc0 t2, CP0_TCSTATUS
- ori t1, t2, TCSTATUS_IXMT
- mtc0 t1, CP0_TCSTATUS
- andi t2, t2, TCSTATUS_IXMT
- _ehb
- DMT 9 # dmt t1
- jal mips_ihb
- nop
-#endif /* CONFIG_MIPS_MT_SMTC */
- mfc0 t0, CP0_STATUS
- ori t0, 0x1f
- xori t0, 0x1f
- mtc0 t0, CP0_STATUS
-#ifdef CONFIG_MIPS_MT_SMTC
- andi t1, t1, VPECONTROL_TE
- beqz t1, 9f
- nop
- EMT # emt
-9:
- mfc0 t1, CP0_TCSTATUS
- xori t1, t1, TCSTATUS_IXMT
- or t1, t1, t2
- mtc0 t1, CP0_TCSTATUS
- _ehb
-#endif /* CONFIG_MIPS_MT_SMTC */
- LONG_L v0, GDB_FR_STATUS(sp)
- LONG_L v1, GDB_FR_EPC(sp)
- mtc0 v0, CP0_STATUS
- DMTC0 v1, CP0_EPC
- LONG_L v0, GDB_FR_HI(sp)
- LONG_L v1, GDB_FR_LO(sp)
- mthi v0
- mtlo v1
- LONG_L $31, GDB_FR_REG31(sp)
- LONG_L $30, GDB_FR_REG30(sp)
- LONG_L $28, GDB_FR_REG28(sp)
- LONG_L $27, GDB_FR_REG27(sp)
- LONG_L $26, GDB_FR_REG26(sp)
- LONG_L $25, GDB_FR_REG25(sp)
- LONG_L $24, GDB_FR_REG24(sp)
- LONG_L $23, GDB_FR_REG23(sp)
- LONG_L $22, GDB_FR_REG22(sp)
- LONG_L $21, GDB_FR_REG21(sp)
- LONG_L $20, GDB_FR_REG20(sp)
- LONG_L $19, GDB_FR_REG19(sp)
- LONG_L $18, GDB_FR_REG18(sp)
- LONG_L $17, GDB_FR_REG17(sp)
- LONG_L $16, GDB_FR_REG16(sp)
- LONG_L $15, GDB_FR_REG15(sp)
- LONG_L $14, GDB_FR_REG14(sp)
- LONG_L $13, GDB_FR_REG13(sp)
- LONG_L $12, GDB_FR_REG12(sp)
- LONG_L $11, GDB_FR_REG11(sp)
- LONG_L $10, GDB_FR_REG10(sp)
- LONG_L $9, GDB_FR_REG9(sp)
- LONG_L $8, GDB_FR_REG8(sp)
- LONG_L $7, GDB_FR_REG7(sp)
- LONG_L $6, GDB_FR_REG6(sp)
- LONG_L $5, GDB_FR_REG5(sp)
- LONG_L $4, GDB_FR_REG4(sp)
- LONG_L $3, GDB_FR_REG3(sp)
- LONG_L $2, GDB_FR_REG2(sp)
- LONG_L $1, GDB_FR_REG1(sp)
-#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
- LONG_L k0, GDB_FR_EPC(sp)
- LONG_L $29, GDB_FR_REG29(sp) /* Deallocate stack */
- jr k0
- rfe
-#else
- LONG_L sp, GDB_FR_REG29(sp) /* Deallocate stack */
-
- .set mips3
- eret
- .set mips0
-#endif
- .set at
- .set reorder
- END(trap_low)
-
-LEAF(kgdb_read_byte)
-4: lb t0, (a0)
- sb t0, (a1)
- li v0, 0
- jr ra
- .section __ex_table,"a"
- PTR 4b, kgdbfault
- .previous
- END(kgdb_read_byte)
-
-LEAF(kgdb_write_byte)
-5: sb a0, (a1)
- li v0, 0
- jr ra
- .section __ex_table,"a"
- PTR 5b, kgdbfault
- .previous
- END(kgdb_write_byte)
-
- .type kgdbfault@function
- .ent kgdbfault
-
-kgdbfault: li v0, -EFAULT
- jr ra
- .end kgdbfault
diff -Nurb linux-2.6.22-570/arch/mips/kernel/gdb-stub.c linux-2.6.22-try2/arch/mips/kernel/gdb-stub.c
--- linux-2.6.22-570/arch/mips/kernel/gdb-stub.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/kernel/gdb-stub.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,1154 +0,0 @@
-/*
- * arch/mips/kernel/gdb-stub.c
- *
- * Originally written by Glenn Engel, Lake Stevens Instrument Division
- *
- * Contributed by HP Systems
- *
- * Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
- * Send complaints, suggestions etc. to
- *
- * Copyright (C) 1995 Andreas Busse
- *
- * Copyright (C) 2003 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- */
-
-/*
- * To enable debugger support, two things need to happen. One, a
- * call to set_debug_traps() is necessary in order to allow any breakpoints
- * or error conditions to be properly intercepted and reported to gdb.
- * Two, a breakpoint needs to be generated to begin communication. This
- * is most easily accomplished by a call to breakpoint(). Breakpoint()
- * simulates a breakpoint by executing a BREAK instruction.
- *
- *
- * The following gdb commands are supported:
- *
- * command function Return value
- *
- * g return the value of the CPU registers hex data or ENN
- * G set the value of the CPU registers OK or ENN
- *
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
- *
- * c Resume at current address SNN ( signal NN)
- * cAA..AA Continue at address AA..AA SNN
- *
- * s Step one instruction SNN
- * sAA..AA Step one instruction from AA..AA SNN
- *
- * k kill
- *
- * ? What was the last sigval ? SNN (signal NN)
- *
- * bBB..BB Set baud rate to BB..BB OK or BNN, then sets
- * baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum. A packet consists of
- *
- * $#.
- *
- * where
- * ::
- * :: < two hex digits computed as modulo 256 sum of >
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer. '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host: Reply:
- * $m0,10#2a +$00010203040506070809101112131415#42
- *
- *
- * ==============
- * MORE EXAMPLES:
- * ==============
- *
- * For reference -- the following are the steps that one
- * company took (RidgeRun Inc) to get remote gdb debugging
- * going. In this scenario the host machine was a PC and the
- * target platform was a Galileo EVB64120A MIPS evaluation
- * board.
- *
- * Step 1:
- * First download gdb-5.0.tar.gz from the internet.
- * and then build/install the package.
- *
- * Example:
- * $ tar zxf gdb-5.0.tar.gz
- * $ cd gdb-5.0
- * $ ./configure --target=mips-linux-elf
- * $ make
- * $ install
- * $ which mips-linux-elf-gdb
- * /usr/local/bin/mips-linux-elf-gdb
- *
- * Step 2:
- * Configure linux for remote debugging and build it.
- *
- * Example:
- * $ cd ~/linux
- * $ make menuconfig
- * $ make
- *
- * Step 3:
- * Download the kernel to the remote target and start
- * the kernel running. It will promptly halt and wait
- * for the host gdb session to connect. It does this
- * since the "Kernel Hacking" option has defined
- * CONFIG_KGDB which in turn enables your calls
- * to:
- * set_debug_traps();
- * breakpoint();
- *
- * Step 4:
- * Start the gdb session on the host.
- *
- * Example:
- * $ mips-linux-elf-gdb vmlinux
- * (gdb) set remotebaud 115200
- * (gdb) target remote /dev/ttyS1
- * ...at this point you are connected to
- * the remote target and can use gdb
- * in the normal fasion. Setting
- * breakpoints, single stepping,
- * printing variables, etc.
- */
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-/*
- * external low-level support routines
- */
-
-extern int putDebugChar(char c); /* write a single character */
-extern char getDebugChar(void); /* read and return a single char */
-extern void trap_low(void);
-
-/*
- * breakpoint and test functions
- */
-extern void breakpoint(void);
-extern void breakinst(void);
-extern void async_breakpoint(void);
-extern void async_breakinst(void);
-extern void adel(void);
-
-/*
- * local prototypes
- */
-
-static void getpacket(char *buffer);
-static void putpacket(char *buffer);
-static int computeSignal(int tt);
-static int hex(unsigned char ch);
-static int hexToInt(char **ptr, int *intValue);
-static int hexToLong(char **ptr, long *longValue);
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault);
-void handle_exception(struct gdb_regs *regs);
-
-int kgdb_enabled;
-
-/*
- * spin locks for smp case
- */
-static DEFINE_SPINLOCK(kgdb_lock);
-static raw_spinlock_t kgdb_cpulock[NR_CPUS] = {
- [0 ... NR_CPUS-1] = __RAW_SPIN_LOCK_UNLOCKED,
-};
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-
-static char input_buffer[BUFMAX];
-static char output_buffer[BUFMAX];
-static int initialized; /* !0 means we've been initialized */
-static int kgdb_started;
-static const char hexchars[]="0123456789abcdef";
-
-/* Used to prevent crashes in memory access. Note that they'll crash anyway if
- we haven't set up fault handlers yet... */
-int kgdb_read_byte(unsigned char *address, unsigned char *dest);
-int kgdb_write_byte(unsigned char val, unsigned char *dest);
-
-/*
- * Convert ch from a hex digit to an int
- */
-static int hex(unsigned char ch)
-{
- if (ch >= 'a' && ch <= 'f')
- return ch-'a'+10;
- if (ch >= '0' && ch <= '9')
- return ch-'0';
- if (ch >= 'A' && ch <= 'F')
- return ch-'A'+10;
- return -1;
-}
-
-/*
- * scan for the sequence $#
- */
-static void getpacket(char *buffer)
-{
- unsigned char checksum;
- unsigned char xmitcsum;
- int i;
- int count;
- unsigned char ch;
-
- do {
- /*
- * wait around for the start character,
- * ignore all other characters
- */
- while ((ch = (getDebugChar() & 0x7f)) != '$') ;
-
- checksum = 0;
- xmitcsum = -1;
- count = 0;
-
- /*
- * now, read until a # or end of buffer is found
- */
- while (count < BUFMAX) {
- ch = getDebugChar();
- if (ch == '#')
- break;
- checksum = checksum + ch;
- buffer[count] = ch;
- count = count + 1;
- }
-
- if (count >= BUFMAX)
- continue;
-
- buffer[count] = 0;
-
- if (ch == '#') {
- xmitcsum = hex(getDebugChar() & 0x7f) << 4;
- xmitcsum |= hex(getDebugChar() & 0x7f);
-
- if (checksum != xmitcsum)
- putDebugChar('-'); /* failed checksum */
- else {
- putDebugChar('+'); /* successful transfer */
-
- /*
- * if a sequence char is present,
- * reply the sequence ID
- */
- if (buffer[2] == ':') {
- putDebugChar(buffer[0]);
- putDebugChar(buffer[1]);
-
- /*
- * remove sequence chars from buffer
- */
- count = strlen(buffer);
- for (i=3; i <= count; i++)
- buffer[i-3] = buffer[i];
- }
- }
- }
- }
- while (checksum != xmitcsum);
-}
-
-/*
- * send the packet in buffer.
- */
-static void putpacket(char *buffer)
-{
- unsigned char checksum;
- int count;
- unsigned char ch;
-
- /*
- * $#.
- */
-
- do {
- putDebugChar('$');
- checksum = 0;
- count = 0;
-
- while ((ch = buffer[count]) != 0) {
- if (!(putDebugChar(ch)))
- return;
- checksum += ch;
- count += 1;
- }
-
- putDebugChar('#');
- putDebugChar(hexchars[checksum >> 4]);
- putDebugChar(hexchars[checksum & 0xf]);
-
- }
- while ((getDebugChar() & 0x7f) != '+');
-}
-
-
-/*
- * Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault)
-{
- unsigned char ch;
-
- while (count-- > 0) {
- if (kgdb_read_byte(mem++, &ch) != 0)
- return 0;
- *buf++ = hexchars[ch >> 4];
- *buf++ = hexchars[ch & 0xf];
- }
-
- *buf = 0;
-
- return buf;
-}
-
-/*
- * convert the hex array pointed to by buf into binary to be placed in mem
- * return a pointer to the character AFTER the last byte written
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static char *hex2mem(char *buf, char *mem, int count, int binary, int may_fault)
-{
- int i;
- unsigned char ch;
-
- for (i=0; itt && ht->signo; ht++)
- saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
-
- putDebugChar('+'); /* 'hello world' */
- /*
- * In case GDB is started before us, ack any packets
- * (presumably "$?#xx") sitting there.
- */
- while((c = getDebugChar()) != '$');
- while((c = getDebugChar()) != '#');
- c = getDebugChar(); /* eat first csum byte */
- c = getDebugChar(); /* eat second csum byte */
- putDebugChar('+'); /* ack it */
-
- initialized = 1;
- local_irq_restore(flags);
-}
-
-void restore_debug_traps(void)
-{
- struct hard_trap_info *ht;
- unsigned long flags;
-
- local_irq_save(flags);
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- set_except_vector(ht->tt, saved_vectors[ht->tt]);
- local_irq_restore(flags);
-}
-
-/*
- * Convert the MIPS hardware trap type code to a Unix signal number.
- */
-static int computeSignal(int tt)
-{
- struct hard_trap_info *ht;
-
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- if (ht->tt == tt)
- return ht->signo;
-
- return SIGHUP; /* default for things we don't know about */
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-static int hexToInt(char **ptr, int *intValue)
-{
- int numChars = 0;
- int hexValue;
-
- *intValue = 0;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *intValue = (*intValue << 4) | hexValue;
- numChars ++;
-
- (*ptr)++;
- }
-
- return (numChars);
-}
-
-static int hexToLong(char **ptr, long *longValue)
-{
- int numChars = 0;
- int hexValue;
-
- *longValue = 0;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *longValue = (*longValue << 4) | hexValue;
- numChars ++;
-
- (*ptr)++;
- }
-
- return numChars;
-}
-
-
-#if 0
-/*
- * Print registers (on target console)
- * Used only to debug the stub...
- */
-void show_gdbregs(struct gdb_regs * regs)
-{
- /*
- * Saved main processor registers
- */
- printk("$0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg0, regs->reg1, regs->reg2, regs->reg3,
- regs->reg4, regs->reg5, regs->reg6, regs->reg7);
- printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg8, regs->reg9, regs->reg10, regs->reg11,
- regs->reg12, regs->reg13, regs->reg14, regs->reg15);
- printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg16, regs->reg17, regs->reg18, regs->reg19,
- regs->reg20, regs->reg21, regs->reg22, regs->reg23);
- printk("$24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg24, regs->reg25, regs->reg26, regs->reg27,
- regs->reg28, regs->reg29, regs->reg30, regs->reg31);
-
- /*
- * Saved cp0 registers
- */
- printk("epc : %08lx\nStatus: %08lx\nCause : %08lx\n",
- regs->cp0_epc, regs->cp0_status, regs->cp0_cause);
-}
-#endif /* dead code */
-
-/*
- * We single-step by setting breakpoints. When an exception
- * is handled, we need to restore the instructions hoisted
- * when the breakpoints were set.
- *
- * This is where we save the original instructions.
- */
-static struct gdb_bp_save {
- unsigned long addr;
- unsigned int val;
-} step_bp[2];
-
-#define BP 0x0000000d /* break opcode */
-
-/*
- * Set breakpoint instructions for single stepping.
- */
-static void single_step(struct gdb_regs *regs)
-{
- union mips_instruction insn;
- unsigned long targ;
- int is_branch, is_cond, i;
-
- targ = regs->cp0_epc;
- insn.word = *(unsigned int *)targ;
- is_branch = is_cond = 0;
-
- switch (insn.i_format.opcode) {
- /*
- * jr and jalr are in r_format format.
- */
- case spec_op:
- switch (insn.r_format.func) {
- case jalr_op:
- case jr_op:
- targ = *(®s->reg0 + insn.r_format.rs);
- is_branch = 1;
- break;
- }
- break;
-
- /*
- * This group contains:
- * bltz_op, bgez_op, bltzl_op, bgezl_op,
- * bltzal_op, bgezal_op, bltzall_op, bgezall_op.
- */
- case bcond_op:
- is_branch = is_cond = 1;
- targ += 4 + (insn.i_format.simmediate << 2);
- break;
-
- /*
- * These are unconditional and in j_format.
- */
- case jal_op:
- case j_op:
- is_branch = 1;
- targ += 4;
- targ >>= 28;
- targ <<= 28;
- targ |= (insn.j_format.target << 2);
- break;
-
- /*
- * These are conditional.
- */
- case beq_op:
- case beql_op:
- case bne_op:
- case bnel_op:
- case blez_op:
- case blezl_op:
- case bgtz_op:
- case bgtzl_op:
- case cop0_op:
- case cop1_op:
- case cop2_op:
- case cop1x_op:
- is_branch = is_cond = 1;
- targ += 4 + (insn.i_format.simmediate << 2);
- break;
- }
-
- if (is_branch) {
- i = 0;
- if (is_cond && targ != (regs->cp0_epc + 8)) {
- step_bp[i].addr = regs->cp0_epc + 8;
- step_bp[i++].val = *(unsigned *)(regs->cp0_epc + 8);
- *(unsigned *)(regs->cp0_epc + 8) = BP;
- }
- step_bp[i].addr = targ;
- step_bp[i].val = *(unsigned *)targ;
- *(unsigned *)targ = BP;
- } else {
- step_bp[0].addr = regs->cp0_epc + 4;
- step_bp[0].val = *(unsigned *)(regs->cp0_epc + 4);
- *(unsigned *)(regs->cp0_epc + 4) = BP;
- }
-}
-
-/*
- * If asynchronously interrupted by gdb, then we need to set a breakpoint
- * at the interrupted instruction so that we wind up stopped with a
- * reasonable stack frame.
- */
-static struct gdb_bp_save async_bp;
-
-/*
- * Swap the interrupted EPC with our asynchronous breakpoint routine.
- * This is safer than stuffing the breakpoint in-place, since no cache
- * flushes (or resulting smp_call_functions) are required. The
- * assumption is that only one CPU will be handling asynchronous bp's,
- * and only one can be active at a time.
- */
-extern spinlock_t smp_call_lock;
-
-void set_async_breakpoint(unsigned long *epc)
-{
- /* skip breaking into userland */
- if ((*epc & 0x80000000) == 0)
- return;
-
-#ifdef CONFIG_SMP
- /* avoid deadlock if someone is make IPC */
- if (spin_is_locked(&smp_call_lock))
- return;
-#endif
-
- async_bp.addr = *epc;
- *epc = (unsigned long)async_breakpoint;
-}
-
-static void kgdb_wait(void *arg)
-{
- unsigned flags;
- int cpu = smp_processor_id();
-
- local_irq_save(flags);
-
- __raw_spin_lock(&kgdb_cpulock[cpu]);
- __raw_spin_unlock(&kgdb_cpulock[cpu]);
-
- local_irq_restore(flags);
-}
-
-/*
- * GDB stub needs to call kgdb_wait on all processor with interrupts
- * disabled, so it uses it's own special variant.
- */
-static int kgdb_smp_call_kgdb_wait(void)
-{
-#ifdef CONFIG_SMP
- struct call_data_struct data;
- int i, cpus = num_online_cpus() - 1;
- int cpu = smp_processor_id();
-
- /*
- * Can die spectacularly if this CPU isn't yet marked online
- */
- BUG_ON(!cpu_online(cpu));
-
- if (!cpus)
- return 0;
-
- if (spin_is_locked(&smp_call_lock)) {
- /*
- * Some other processor is trying to make us do something
- * but we're not going to respond... give up
- */
- return -1;
- }
-
- /*
- * We will continue here, accepting the fact that
- * the kernel may deadlock if another CPU attempts
- * to call smp_call_function now...
- */
-
- data.func = kgdb_wait;
- data.info = NULL;
- atomic_set(&data.started, 0);
- data.wait = 0;
-
- spin_lock(&smp_call_lock);
- call_data = &data;
- mb();
-
- /* Send a message to all other CPUs and wait for them to respond */
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_online(i) && i != cpu)
- core_send_ipi(i, SMP_CALL_FUNCTION);
-
- /* Wait for response */
- /* FIXME: lock-up detection, backtrace on lock-up */
- while (atomic_read(&data.started) != cpus)
- barrier();
-
- call_data = NULL;
- spin_unlock(&smp_call_lock);
-#endif
-
- return 0;
-}
-
-/*
- * This function does all command processing for interfacing to gdb. It
- * returns 1 if you should skip the instruction at the trap address, 0
- * otherwise.
- */
-void handle_exception (struct gdb_regs *regs)
-{
- int trap; /* Trap type */
- int sigval;
- long addr;
- int length;
- char *ptr;
- unsigned long *stack;
- int i;
- int bflag = 0;
-
- kgdb_started = 1;
-
- /*
- * acquire the big kgdb spinlock
- */
- if (!spin_trylock(&kgdb_lock)) {
- /*
- * some other CPU has the lock, we should go back to
- * receive the gdb_wait IPC
- */
- return;
- }
-
- /*
- * If we're in async_breakpoint(), restore the real EPC from
- * the breakpoint.
- */
- if (regs->cp0_epc == (unsigned long)async_breakinst) {
- regs->cp0_epc = async_bp.addr;
- async_bp.addr = 0;
- }
-
- /*
- * acquire the CPU spinlocks
- */
- for (i = num_online_cpus()-1; i >= 0; i--)
- if (__raw_spin_trylock(&kgdb_cpulock[i]) == 0)
- panic("kgdb: couldn't get cpulock %d\n", i);
-
- /*
- * force other cpus to enter kgdb
- */
- kgdb_smp_call_kgdb_wait();
-
- /*
- * If we're in breakpoint() increment the PC
- */
- trap = (regs->cp0_cause & 0x7c) >> 2;
- if (trap == 9 && regs->cp0_epc == (unsigned long)breakinst)
- regs->cp0_epc += 4;
-
- /*
- * If we were single_stepping, restore the opcodes hoisted
- * for the breakpoint[s].
- */
- if (step_bp[0].addr) {
- *(unsigned *)step_bp[0].addr = step_bp[0].val;
- step_bp[0].addr = 0;
-
- if (step_bp[1].addr) {
- *(unsigned *)step_bp[1].addr = step_bp[1].val;
- step_bp[1].addr = 0;
- }
- }
-
- stack = (long *)regs->reg29; /* stack ptr */
- sigval = computeSignal(trap);
-
- /*
- * reply to host that an exception has occurred
- */
- ptr = output_buffer;
-
- /*
- * Send trap type (converted to signal)
- */
- *ptr++ = 'T';
- *ptr++ = hexchars[sigval >> 4];
- *ptr++ = hexchars[sigval & 0xf];
-
- /*
- * Send Error PC
- */
- *ptr++ = hexchars[REG_EPC >> 4];
- *ptr++ = hexchars[REG_EPC & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->cp0_epc, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- /*
- * Send frame pointer
- */
- *ptr++ = hexchars[REG_FP >> 4];
- *ptr++ = hexchars[REG_FP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->reg30, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- /*
- * Send stack pointer
- */
- *ptr++ = hexchars[REG_SP >> 4];
- *ptr++ = hexchars[REG_SP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->reg29, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- *ptr++ = 0;
- putpacket(output_buffer); /* send it off... */
-
- /*
- * Wait for input from remote GDB
- */
- while (1) {
- output_buffer[0] = 0;
- getpacket(input_buffer);
-
- switch (input_buffer[0])
- {
- case '?':
- output_buffer[0] = 'S';
- output_buffer[1] = hexchars[sigval >> 4];
- output_buffer[2] = hexchars[sigval & 0xf];
- output_buffer[3] = 0;
- break;
-
- /*
- * Detach debugger; let CPU run
- */
- case 'D':
- putpacket(output_buffer);
- goto finish_kgdb;
- break;
-
- case 'd':
- /* toggle debug flag */
- break;
-
- /*
- * Return the value of the CPU registers
- */
- case 'g':
- ptr = output_buffer;
- ptr = mem2hex((char *)®s->reg0, ptr, 32*sizeof(long), 0); /* r0...r31 */
- ptr = mem2hex((char *)®s->cp0_status, ptr, 6*sizeof(long), 0); /* cp0 */
- ptr = mem2hex((char *)®s->fpr0, ptr, 32*sizeof(long), 0); /* f0...31 */
- ptr = mem2hex((char *)®s->cp1_fsr, ptr, 2*sizeof(long), 0); /* cp1 */
- ptr = mem2hex((char *)®s->frame_ptr, ptr, 2*sizeof(long), 0); /* frp */
- ptr = mem2hex((char *)®s->cp0_index, ptr, 16*sizeof(long), 0); /* cp0 */
- break;
-
- /*
- * set the value of the CPU registers - return OK
- */
- case 'G':
- {
- ptr = &input_buffer[1];
- hex2mem(ptr, (char *)®s->reg0, 32*sizeof(long), 0, 0);
- ptr += 32*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp0_status, 6*sizeof(long), 0, 0);
- ptr += 6*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->fpr0, 32*sizeof(long), 0, 0);
- ptr += 32*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp1_fsr, 2*sizeof(long), 0, 0);
- ptr += 2*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->frame_ptr, 2*sizeof(long), 0, 0);
- ptr += 2*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp0_index, 16*sizeof(long), 0, 0);
- strcpy(output_buffer,"OK");
- }
- break;
-
- /*
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA
- */
- case 'm':
- ptr = &input_buffer[1];
-
- if (hexToLong(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length)) {
- if (mem2hex((char *)addr, output_buffer, length, 1))
- break;
- strcpy (output_buffer, "E03");
- } else
- strcpy(output_buffer,"E01");
- break;
-
- /*
- * XAA..AA,LLLL: Write LLLL escaped binary bytes at address AA.AA
- */
- case 'X':
- bflag = 1;
- /* fall through */
-
- /*
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK
- */
- case 'M':
- ptr = &input_buffer[1];
-
- if (hexToLong(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length)
- && *ptr++ == ':') {
- if (hex2mem(ptr, (char *)addr, length, bflag, 1))
- strcpy(output_buffer, "OK");
- else
- strcpy(output_buffer, "E03");
- }
- else
- strcpy(output_buffer, "E02");
- break;
-
- /*
- * cAA..AA Continue at address AA..AA(optional)
- */
- case 'c':
- /* try to read optional parameter, pc unchanged if no parm */
-
- ptr = &input_buffer[1];
- if (hexToLong(&ptr, &addr))
- regs->cp0_epc = addr;
-
- goto exit_kgdb_exception;
- break;
-
- /*
- * kill the program; let us try to restart the machine
- * Reset the whole machine.
- */
- case 'k':
- case 'r':
- machine_restart("kgdb restarts machine");
- break;
-
- /*
- * Step to next instruction
- */
- case 's':
- /*
- * There is no single step insn in the MIPS ISA, so we
- * use breakpoints and continue, instead.
- */
- single_step(regs);
- goto exit_kgdb_exception;
- /* NOTREACHED */
- break;
-
- /*
- * Set baud rate (bBB)
- * FIXME: Needs to be written
- */
- case 'b':
- {
-#if 0
- int baudrate;
- extern void set_timer_3();
-
- ptr = &input_buffer[1];
- if (!hexToInt(&ptr, &baudrate))
- {
- strcpy(output_buffer,"B01");
- break;
- }
-
- /* Convert baud rate to uart clock divider */
-
- switch (baudrate)
- {
- case 38400:
- baudrate = 16;
- break;
- case 19200:
- baudrate = 33;
- break;
- case 9600:
- baudrate = 65;
- break;
- default:
- baudrate = 0;
- strcpy(output_buffer,"B02");
- goto x1;
- }
-
- if (baudrate) {
- putpacket("OK"); /* Ack before changing speed */
- set_timer_3(baudrate); /* Set it */
- }
-#endif
- }
- break;
-
- } /* switch */
-
- /*
- * reply to the request
- */
-
- putpacket(output_buffer);
-
- } /* while */
-
- return;
-
-finish_kgdb:
- restore_debug_traps();
-
-exit_kgdb_exception:
- /* release locks so other CPUs can go */
- for (i = num_online_cpus()-1; i >= 0; i--)
- __raw_spin_unlock(&kgdb_cpulock[i]);
- spin_unlock(&kgdb_lock);
-
- __flush_cache_all();
- return;
-}
-
-/*
- * This function will generate a breakpoint exception. It is used at the
- * beginning of a program to sync up with a debugger and can be used
- * otherwise as a quick means to stop program execution and "break" into
- * the debugger.
- */
-void breakpoint(void)
-{
- if (!initialized)
- return;
-
- __asm__ __volatile__(
- ".globl breakinst\n\t"
- ".set\tnoreorder\n\t"
- "nop\n"
- "breakinst:\tbreak\n\t"
- "nop\n\t"
- ".set\treorder"
- );
-}
-
-/* Nothing but the break; don't pollute any registers */
-void async_breakpoint(void)
-{
- __asm__ __volatile__(
- ".globl async_breakinst\n\t"
- ".set\tnoreorder\n\t"
- "nop\n"
- "async_breakinst:\tbreak\n\t"
- "nop\n\t"
- ".set\treorder"
- );
-}
-
-void adel(void)
-{
- __asm__ __volatile__(
- ".globl\tadel\n\t"
- "lui\t$8,0x8000\n\t"
- "lw\t$9,1($8)\n\t"
- );
-}
-
-/*
- * malloc is needed by gdb client in "call func()", even a private one
- * will make gdb happy
- */
-static void * __attribute_used__ malloc(size_t size)
-{
- return kmalloc(size, GFP_ATOMIC);
-}
-
-static void __attribute_used__ free (void *where)
-{
- kfree(where);
-}
-
-#ifdef CONFIG_GDB_CONSOLE
-
-void gdb_putsn(const char *str, int l)
-{
- char outbuf[18];
-
- if (!kgdb_started)
- return;
-
- outbuf[0]='O';
-
- while(l) {
- int i = (l>8)?8:l;
- mem2hex((char *)str, &outbuf[1], i, 0);
- outbuf[(i*2)+1]=0;
- putpacket(outbuf);
- str += i;
- l -= i;
- }
-}
-
-static void gdb_console_write(struct console *con, const char *s, unsigned n)
-{
- gdb_putsn(s, n);
-}
-
-static struct console gdb_console = {
- .name = "gdb",
- .write = gdb_console_write,
- .flags = CON_PRINTBUFFER,
- .index = -1
-};
-
-static int __init register_gdb_console(void)
-{
- register_console(&gdb_console);
-
- return 0;
-}
-
-console_initcall(register_gdb_console);
-
-#endif
diff -Nurb linux-2.6.22-570/arch/mips/kernel/irq.c linux-2.6.22-try2/arch/mips/kernel/irq.c
--- linux-2.6.22-570/arch/mips/kernel/irq.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/kernel/irq.c 2007-12-19 15:29:23.000000000 -0500
@@ -25,6 +25,10 @@
#include
#include
#include
+#include
+
+/* Keep track of if we've done certain initialization already or not. */
+int kgdb_early_setup;
static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
@@ -138,28 +142,23 @@
atomic_inc(&irq_err_count);
}
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
+void __init init_IRQ(void)
{
- kgdb_flag = 0;
- return 1;
-}
-__setup("nokgdb", nokgdb);
+
+#ifdef CONFIG_KGDB
+ if (kgdb_early_setup)
+ return;
#endif
-void __init init_IRQ(void)
-{
arch_init_irq();
+
#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- printk("Wait for gdb client connection ...\n");
- set_debug_traps();
- breakpoint();
- }
+ /*
+ * We have been called before kgdb_arch_init(). Hence,
+ * we dont want the traps to be reinitialized
+ */
+ if (kgdb_early_setup == 0)
+ kgdb_early_setup = 1;
#endif
}
diff -Nurb linux-2.6.22-570/arch/mips/kernel/kgdb-jmp.c linux-2.6.22-try2/arch/mips/kernel/kgdb-jmp.c
--- linux-2.6.22-570/arch/mips/kernel/kgdb-jmp.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/kernel/kgdb-jmp.c 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,110 @@
+/*
+ * arch/mips/kernel/kgdb-jmp.c
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Author: Tom Rini
+ * Author: Manish Lachwani
+ *
+ * Cribbed from glibc, which carries the following:
+ * Copyright (C) 1996, 1997, 2000, 2002, 2003 Free Software Foundation, Inc.
+ * Copyright (C) 2005-2006 by MontaVista Software.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include
+
+#ifdef CONFIG_64BIT
+/*
+ * MIPS 64-bit
+ */
+
+int kgdb_fault_setjmp_aux(unsigned long *curr_context, unsigned long sp, unsigned long fp)
+{
+ __asm__ __volatile__ ("sd $gp, %0" : : "m" (curr_context[0]));
+ __asm__ __volatile__ ("sd $16, %0" : : "m" (curr_context[1]));
+ __asm__ __volatile__ ("sd $17, %0" : : "m" (curr_context[2]));
+ __asm__ __volatile__ ("sd $18, %0" : : "m" (curr_context[3]));
+ __asm__ __volatile__ ("sd $19, %0" : : "m" (curr_context[4]));
+ __asm__ __volatile__ ("sd $20, %0" : : "m" (curr_context[5]));
+ __asm__ __volatile__ ("sd $21, %0" : : "m" (curr_context[6]));
+ __asm__ __volatile__ ("sd $22, %0" : : "m" (curr_context[7]));
+ __asm__ __volatile__ ("sd $23, %0" : : "m" (curr_context[8]));
+ __asm__ __volatile__ ("sd $31, %0" : : "m" (curr_context[9]));
+ curr_context[10] = sp;
+ curr_context[11] = fp;
+
+ return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+ __asm__ __volatile__ ("ld $gp, %0" : : "m" (curr_context[0]));
+ __asm__ __volatile__ ("ld $16, %0" : : "m" (curr_context[1]));
+ __asm__ __volatile__ ("ld $17, %0" : : "m" (curr_context[2]));
+ __asm__ __volatile__ ("ld $18, %0" : : "m" (curr_context[3]));
+ __asm__ __volatile__ ("ld $19, %0" : : "m" (curr_context[4]));
+ __asm__ __volatile__ ("ld $20, %0" : : "m" (curr_context[5]));
+ __asm__ __volatile__ ("ld $21, %0" : : "m" (curr_context[6]));
+ __asm__ __volatile__ ("ld $22, %0" : : "m" (curr_context[7]));
+ __asm__ __volatile__ ("ld $23, %0" : : "m" (curr_context[8]));
+ __asm__ __volatile__ ("ld $25, %0" : : "m" (curr_context[9]));
+ __asm__ __volatile__ ("ld $29, %0\n\t"
+ "ld $30, %1\n\t" : :
+ "m" (curr_context[10]), "m" (curr_context[11]));
+
+ __asm__ __volatile__ ("dli $2, 1");
+ __asm__ __volatile__ ("j $25");
+
+ for (;;);
+}
+#else
+/*
+ * MIPS 32-bit
+ */
+
+int kgdb_fault_setjmp_aux(unsigned long *curr_context, unsigned long sp, unsigned long fp)
+{
+ __asm__ __volatile__("sw $gp, %0" : : "m" (curr_context[0]));
+ __asm__ __volatile__("sw $16, %0" : : "m" (curr_context[1]));
+ __asm__ __volatile__("sw $17, %0" : : "m" (curr_context[2]));
+ __asm__ __volatile__("sw $18, %0" : : "m" (curr_context[3]));
+ __asm__ __volatile__("sw $19, %0" : : "m" (curr_context[4]));
+ __asm__ __volatile__("sw $20, %0" : : "m" (curr_context[5]));
+ __asm__ __volatile__("sw $21, %0" : : "m" (curr_context[6]));
+ __asm__ __volatile__("sw $22, %0" : : "m" (curr_context[7]));
+ __asm__ __volatile__("sw $23, %0" : : "m" (curr_context[8]));
+ __asm__ __volatile__("sw $31, %0" : : "m" (curr_context[9]));
+ curr_context[10] = sp;
+ curr_context[11] = fp;
+
+ return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+ __asm__ __volatile__("lw $gp, %0" : : "m" (curr_context[0]));
+ __asm__ __volatile__("lw $16, %0" : : "m" (curr_context[1]));
+ __asm__ __volatile__("lw $17, %0" : : "m" (curr_context[2]));
+ __asm__ __volatile__("lw $18, %0" : : "m" (curr_context[3]));
+ __asm__ __volatile__("lw $19, %0" : : "m" (curr_context[4]));
+ __asm__ __volatile__("lw $20, %0" : : "m" (curr_context[5]));
+ __asm__ __volatile__("lw $21, %0" : : "m" (curr_context[6]));
+ __asm__ __volatile__("lw $22, %0" : : "m" (curr_context[7]));
+ __asm__ __volatile__("lw $23, %0" : : "m" (curr_context[8]));
+ __asm__ __volatile__("lw $25, %0" : : "m" (curr_context[9]));
+
+ __asm__ __volatile__("lw $29, %0\n\t"
+ "lw $30, %1\n\t" : :
+ "m" (curr_context[10]), "m" (curr_context[11]));
+
+ __asm__ __volatile__("li $2, 1");
+ __asm__ __volatile__("jr $25");
+
+ for (;;);
+}
+#endif
diff -Nurb linux-2.6.22-570/arch/mips/kernel/kgdb-setjmp.S linux-2.6.22-try2/arch/mips/kernel/kgdb-setjmp.S
--- linux-2.6.22-570/arch/mips/kernel/kgdb-setjmp.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/kernel/kgdb-setjmp.S 2007-12-19 15:29:23.000000000 -0500
@@ -0,0 +1,28 @@
+/*
+ * arch/mips/kernel/kgdb-jmp.c
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Copyright (C) 2005 by MontaVista Software.
+ * Author: Manish Lachwani (mlachwani@mvista.com)
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include
+#include
+#include
+#include
+
+ .ent kgdb_fault_setjmp,0
+ENTRY (kgdb_fault_setjmp)
+ move a1, sp
+ move a2, fp
+#ifdef CONFIG_64BIT
+ nop
+#endif
+ j kgdb_fault_setjmp_aux
+ .end kgdb_fault_setjmp
diff -Nurb linux-2.6.22-570/arch/mips/kernel/kgdb.c linux-2.6.22-try2/arch/mips/kernel/kgdb.c
--- linux-2.6.22-570/arch/mips/kernel/kgdb.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/kernel/kgdb.c 2007-12-19 15:29:24.000000000 -0500
@@ -0,0 +1,299 @@
+/*
+ * arch/mips/kernel/kgdb.c
+ *
+ * Originally written by Glenn Engel, Lake Stevens Instrument Division
+ *
+ * Contributed by HP Systems
+ *
+ * Modified for SPARC by Stu Grossman, Cygnus Support.
+ *
+ * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
+ * Send complaints, suggestions etc. to
+ *
+ * Copyright (C) 1995 Andreas Busse
+ *
+ * Copyright (C) 2003 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include /* for linux pt_regs struct */
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+static struct hard_trap_info {
+ unsigned char tt; /* Trap type code for MIPS R3xxx and R4xxx */
+ unsigned char signo; /* Signal that we map this trap into */
+} hard_trap_info[] = {
+ { 6, SIGBUS }, /* instruction bus error */
+ { 7, SIGBUS }, /* data bus error */
+ { 9, SIGTRAP }, /* break */
+/* { 11, SIGILL }, */ /* CPU unusable */
+ { 12, SIGFPE }, /* overflow */
+ { 13, SIGTRAP }, /* trap */
+ { 14, SIGSEGV }, /* virtual instruction cache coherency */
+ { 15, SIGFPE }, /* floating point exception */
+ { 23, SIGSEGV }, /* watch */
+ { 31, SIGSEGV }, /* virtual data cache coherency */
+ { 0, 0} /* Must be last */
+};
+
+/* Save the normal trap handlers for user-mode traps. */
+void *saved_vectors[32];
+
+extern void trap_low(void);
+extern void breakinst(void);
+extern void init_IRQ(void);
+
+void kgdb_call_nmi_hook(void *ignored)
+{
+ kgdb_nmihook(smp_processor_id(), (void *)0);
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ local_irq_enable();
+ smp_call_function(kgdb_call_nmi_hook, 0, 0, 0);
+ local_irq_disable();
+}
+
+static int compute_signal(int tt)
+{
+ struct hard_trap_info *ht;
+
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ if (ht->tt == tt)
+ return ht->signo;
+
+ return SIGHUP; /* default for things we don't know about */
+}
+
+/*
+ * Set up exception handlers for tracing and breakpoints
+ */
+void handle_exception(struct pt_regs *regs)
+{
+ int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+ if (fixup_exception(regs)) {
+ return;
+ }
+
+ if (atomic_read(&debugger_active))
+ kgdb_nmihook(smp_processor_id(), regs);
+
+ if (atomic_read(&kgdb_setting_breakpoint))
+ if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
+ regs->cp0_epc += 4;
+
+ kgdb_handle_exception(0, compute_signal(trap), 0, regs);
+
+ /* In SMP mode, __flush_cache_all does IPI */
+ local_irq_enable();
+ __flush_cache_all();
+}
+
+void set_debug_traps(void)
+{
+ struct hard_trap_info *ht;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
+
+ local_irq_restore(flags);
+}
+
+#if 0
+/* This should be called before we exit kgdb_handle_exception() I believe.
+ * -- Tom
+ */
+void restore_debug_traps(void)
+{
+ struct hard_trap_info *ht;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ set_except_vector(ht->tt, saved_vectors[ht->tt]);
+ local_irq_restore(flags);
+}
+#endif
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ int reg;
+ gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+ for (reg = 0; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ return;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+
+ int reg;
+ const gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+ for (reg = 0; reg < 32; reg++)
+ regs->regs[reg] = *(ptr++);
+
+ regs->cp0_status = *(ptr++);
+ regs->lo = *(ptr++);
+ regs->hi = *(ptr++);
+ regs->cp0_badvaddr = *(ptr++);
+ regs->cp0_cause = *(ptr++);
+ regs->cp0_epc = *(ptr++);
+
+ return;
+}
+
+/*
+ * Similar to regs_to_gdb_regs() except that process is sleeping and so
+ * we may not be able to get all the info.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+ int reg;
+ struct thread_info *ti = task_thread_info(p);
+ unsigned long ksp = (unsigned long)ti + THREAD_SIZE - 32;
+ struct pt_regs *regs = (struct pt_regs *)ksp - 1;
+ gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+ for (reg = 0; reg < 16; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ /* S0 - S7 */
+ for (reg = 16; reg < 24; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ for (reg = 24; reg < 28; reg++)
+ *(ptr++) = 0;
+
+ /* GP, SP, FP, RA */
+ for (reg = 28; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ return;
+}
+
+/*
+ * Calls linux_debug_hook before the kernel dies. If KGDB is enabled,
+ * then try to fall into the debugger
+ */
+static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
+ void *ptr)
+{
+ struct die_args *args = (struct die_args *)ptr;
+ struct pt_regs *regs = args->regs;
+ int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+ /* See if KGDB is interested. */
+ if (user_mode(regs))
+ /* Userpace events, ignore. */
+ return NOTIFY_DONE;
+
+ kgdb_handle_exception(trap, compute_signal(trap), 0, regs);
+ return NOTIFY_OK;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_mips_notify,
+};
+
+/*
+ * Handle the 's' and 'c' commands
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+ char *remcom_in_buffer, char *remcom_out_buffer,
+ struct pt_regs *regs)
+{
+ char *ptr;
+ unsigned long address;
+ int cpu = smp_processor_id();
+
+ switch (remcom_in_buffer[0]) {
+ case 's':
+ case 'c':
+ /* handle the optional parameter */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &address))
+ regs->cp0_epc = address;
+
+ atomic_set(&cpu_doing_single_step, -1);
+ if (remcom_in_buffer[0] == 's')
+ if (kgdb_contthread)
+ atomic_set(&cpu_doing_single_step, cpu);
+
+ return 0;
+ }
+
+ return -1;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ .gdb_bpt_instr = {0xd},
+#else
+ .gdb_bpt_instr = {0x00, 0x00, 0x00, 0x0d},
+#endif
+};
+
+/*
+ * We use kgdb_early_setup so that functions we need to call now don't
+ * cause trouble when called again later.
+ */
+__init int kgdb_arch_init(void)
+{
+ /* Board-specifics. */
+ /* Force some calls to happen earlier. */
+ if (kgdb_early_setup == 0) {
+ trap_init();
+ init_IRQ();
+ kgdb_early_setup = 1;
+ }
+
+ /* Set our traps. */
+ /* This needs to be done more finely grained again, paired in
+ * a before/after in kgdb_handle_exception(...) -- Tom */
+ set_debug_traps();
+ register_die_notifier(&kgdb_notifier);
+
+ return 0;
+}
diff -Nurb linux-2.6.22-570/arch/mips/kernel/kgdb_handler.S linux-2.6.22-try2/arch/mips/kernel/kgdb_handler.S
--- linux-2.6.22-570/arch/mips/kernel/kgdb_handler.S 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/kernel/kgdb_handler.S 2007-12-19 15:29:24.000000000 -0500
@@ -0,0 +1,339 @@
+/*
+ * arch/mips/kernel/kgdb_handler.S
+ *
+ * Copyright (C) 2007 Wind River Systems, Inc
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/*
+ * Trap Handler for the new KGDB framework. The main KGDB handler is
+ * handle_exception that will be called from here
+ *
+ */
+
+#include
+
+#include
+#include
+#include
+#include
+#include
+#include
+
+#ifdef CONFIG_32BIT
+#define DMFC0 mfc0
+#define DMTC0 mtc0
+#define LDC1 lwc1
+#define SDC1 swc1
+#endif
+#ifdef CONFIG_64BIT
+#define DMFC0 dmfc0
+#define DMTC0 dmtc0
+#define LDC1 ldc1
+#define SDC1 sdc1
+#endif
+
+#include
+
+/*
+ * [jsun] We reserves about 2x GDB_FR_SIZE in stack. The lower (addressed)
+ * part is used to store registers and passed to exception handler.
+ * The upper part is reserved for "call func" feature where gdb client
+ * saves some of the regs, setups call frame and passes args.
+ *
+ * A trace shows about 200 bytes are used to store about half of all regs.
+ * The rest should be big enough for frame setup and passing args.
+ */
+
+/*
+ * The low level trap handler
+ */
+ .align 5
+ NESTED(trap_low, GDB_FR_SIZE, sp)
+ .set noat
+ .set noreorder
+
+ mfc0 k0, CP0_STATUS
+ sll k0, 3 /* extract cu0 bit */
+ bltz k0, 1f
+ move k1, sp
+
+ /*
+ * Called from user mode, go somewhere else.
+ */
+#if defined(CONFIG_32BIT)
+ lui k1, %hi(saved_vectors)
+ mfc0 k0, CP0_CAUSE
+ andi k0, k0, 0x7c
+ add k1, k1, k0
+ lw k0, %lo(saved_vectors)(k1)
+#elif defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
+ DMFC0 k0, CP0_CAUSE
+ lui k1, %highest(saved_vectors)
+ andi k0, k0, 0x7c /* mask exception type */
+ dsll k0, 1 /* turn into byte offset */
+ daddiu k1, %higher(saved_vectors)
+ dsll k1, k1, 16
+ daddiu k1, %hi(saved_vectors)
+ dsll k1, k1, 16
+ daddu k1, k1, k0
+ LONG_L k0, %lo(saved_vectors)(k1)
+#else
+#error "MIPS configuration is unsupported for kgdb!!"
+#endif
+ jr k0
+ nop
+1:
+ move k0, sp
+ PTR_SUBU sp, k1, GDB_FR_SIZE*2 # see comment above
+ LONG_S k0, GDB_FR_REG29(sp)
+ LONG_S $2, GDB_FR_REG2(sp)
+
+/*
+ * First save the CP0 and special registers
+ */
+
+ mfc0 v0, CP0_STATUS
+ LONG_S v0, GDB_FR_STATUS(sp)
+ mfc0 v0, CP0_CAUSE
+ LONG_S v0, GDB_FR_CAUSE(sp)
+ DMFC0 v0, CP0_EPC
+ LONG_S v0, GDB_FR_EPC(sp)
+ DMFC0 v0, CP0_BADVADDR
+ LONG_S v0, GDB_FR_BADVADDR(sp)
+ mfhi v0
+ LONG_S v0, GDB_FR_HI(sp)
+ mflo v0
+ LONG_S v0, GDB_FR_LO(sp)
+
+/*
+ * Now the integer registers
+ */
+
+ LONG_S zero, GDB_FR_REG0(sp) /* I know... */
+ LONG_S $1, GDB_FR_REG1(sp)
+ /* v0 already saved */
+ LONG_S $3, GDB_FR_REG3(sp)
+ LONG_S $4, GDB_FR_REG4(sp)
+ LONG_S $5, GDB_FR_REG5(sp)
+ LONG_S $6, GDB_FR_REG6(sp)
+ LONG_S $7, GDB_FR_REG7(sp)
+ LONG_S $8, GDB_FR_REG8(sp)
+ LONG_S $9, GDB_FR_REG9(sp)
+ LONG_S $10, GDB_FR_REG10(sp)
+ LONG_S $11, GDB_FR_REG11(sp)
+ LONG_S $12, GDB_FR_REG12(sp)
+ LONG_S $13, GDB_FR_REG13(sp)
+ LONG_S $14, GDB_FR_REG14(sp)
+ LONG_S $15, GDB_FR_REG15(sp)
+ LONG_S $16, GDB_FR_REG16(sp)
+ LONG_S $17, GDB_FR_REG17(sp)
+ LONG_S $18, GDB_FR_REG18(sp)
+ LONG_S $19, GDB_FR_REG19(sp)
+ LONG_S $20, GDB_FR_REG20(sp)
+ LONG_S $21, GDB_FR_REG21(sp)
+ LONG_S $22, GDB_FR_REG22(sp)
+ LONG_S $23, GDB_FR_REG23(sp)
+ LONG_S $24, GDB_FR_REG24(sp)
+ LONG_S $25, GDB_FR_REG25(sp)
+ LONG_S $26, GDB_FR_REG26(sp)
+ LONG_S $27, GDB_FR_REG27(sp)
+ LONG_S $28, GDB_FR_REG28(sp)
+ /* sp already saved */
+ LONG_S $30, GDB_FR_REG30(sp)
+ LONG_S $31, GDB_FR_REG31(sp)
+
+ CLI /* disable interrupts */
+
+/*
+ * Followed by the floating point registers
+ */
+ mfc0 v0, CP0_STATUS /* FPU enabled? */
+ srl v0, v0, 16
+ andi v0, v0, (ST0_CU1 >> 16)
+
+ beqz v0,3f /* disabled, skip */
+ nop
+
+ li t0, 0
+#ifdef CONFIG_64BIT
+ mfc0 t0, CP0_STATUS
+#endif
+ fpu_save_double_kgdb sp t0 t1 # clobbers t1
+
+
+/*
+ * Current stack frame ptr
+ */
+
+3:
+ LONG_S sp, GDB_FR_FRP(sp)
+
+/*
+ * CP0 registers (R4000/R4400 unused registers skipped)
+ */
+
+ mfc0 v0, CP0_INDEX
+ LONG_S v0, GDB_FR_CP0_INDEX(sp)
+ mfc0 v0, CP0_RANDOM
+ LONG_S v0, GDB_FR_CP0_RANDOM(sp)
+ DMFC0 v0, CP0_ENTRYLO0
+ LONG_S v0, GDB_FR_CP0_ENTRYLO0(sp)
+ DMFC0 v0, CP0_ENTRYLO1
+ LONG_S v0, GDB_FR_CP0_ENTRYLO1(sp)
+ DMFC0 v0, CP0_CONTEXT
+ LONG_S v0, GDB_FR_CP0_CONTEXT(sp)
+ mfc0 v0, CP0_PAGEMASK
+ LONG_S v0, GDB_FR_CP0_PAGEMASK(sp)
+ mfc0 v0, CP0_WIRED
+ LONG_S v0, GDB_FR_CP0_WIRED(sp)
+ DMFC0 v0, CP0_ENTRYHI
+ LONG_S v0, GDB_FR_CP0_ENTRYHI(sp)
+ mfc0 v0, CP0_PRID
+ LONG_S v0, GDB_FR_CP0_PRID(sp)
+
+ .set at
+
+/*
+ * Continue with the higher level handler
+ */
+
+ move a0,sp
+
+ jal handle_exception
+ nop
+
+/*
+ * Restore all writable registers, in reverse order
+ */
+
+ .set noat
+
+ LONG_L v0, GDB_FR_CP0_ENTRYHI(sp)
+ LONG_L v1, GDB_FR_CP0_WIRED(sp)
+ DMTC0 v0, CP0_ENTRYHI
+ mtc0 v1, CP0_WIRED
+ LONG_L v0, GDB_FR_CP0_PAGEMASK(sp)
+ LONG_L v1, GDB_FR_CP0_ENTRYLO1(sp)
+ mtc0 v0, CP0_PAGEMASK
+ DMTC0 v1, CP0_ENTRYLO1
+ LONG_L v0, GDB_FR_CP0_ENTRYLO0(sp)
+ LONG_L v1, GDB_FR_CP0_INDEX(sp)
+ DMTC0 v0, CP0_ENTRYLO0
+ LONG_L v0, GDB_FR_CP0_CONTEXT(sp)
+ mtc0 v1, CP0_INDEX
+ DMTC0 v0, CP0_CONTEXT
+
+
+/*
+ * Next, the floating point registers
+ */
+ mfc0 v0, CP0_STATUS /* check if the FPU is enabled */
+ srl v0, v0, 16
+ andi v0, v0, (ST0_CU1 >> 16)
+
+ beqz v0, 3f /* disabled, skip */
+ nop
+
+ li t0, 0
+#ifdef CONFIG_64BIT
+ mfc0 t0, CP0_STATUS
+#endif
+ fpu_restore_double_kgdb sp t0 t1 # clobbers t1
+
+
+/*
+ * Now the CP0 and integer registers
+ */
+
+3:
+ mfc0 t0, CP0_STATUS
+ ori t0, 0x1f
+ xori t0, 0x1f
+ mtc0 t0, CP0_STATUS
+
+ LONG_L v0, GDB_FR_STATUS(sp)
+ LONG_L v1, GDB_FR_EPC(sp)
+ mtc0 v0, CP0_STATUS
+ DMTC0 v1, CP0_EPC
+ LONG_L v0, GDB_FR_HI(sp)
+ LONG_L v1, GDB_FR_LO(sp)
+ mthi v0
+ mtlo v1
+ LONG_L $31, GDB_FR_REG31(sp)
+ LONG_L $30, GDB_FR_REG30(sp)
+ LONG_L $28, GDB_FR_REG28(sp)
+ LONG_L $27, GDB_FR_REG27(sp)
+ LONG_L $26, GDB_FR_REG26(sp)
+ LONG_L $25, GDB_FR_REG25(sp)
+ LONG_L $24, GDB_FR_REG24(sp)
+ LONG_L $23, GDB_FR_REG23(sp)
+ LONG_L $22, GDB_FR_REG22(sp)
+ LONG_L $21, GDB_FR_REG21(sp)
+ LONG_L $20, GDB_FR_REG20(sp)
+ LONG_L $19, GDB_FR_REG19(sp)
+ LONG_L $18, GDB_FR_REG18(sp)
+ LONG_L $17, GDB_FR_REG17(sp)
+ LONG_L $16, GDB_FR_REG16(sp)
+ LONG_L $15, GDB_FR_REG15(sp)
+ LONG_L $14, GDB_FR_REG14(sp)
+ LONG_L $13, GDB_FR_REG13(sp)
+ LONG_L $12, GDB_FR_REG12(sp)
+ LONG_L $11, GDB_FR_REG11(sp)
+ LONG_L $10, GDB_FR_REG10(sp)
+ LONG_L $9, GDB_FR_REG9(sp)
+ LONG_L $8, GDB_FR_REG8(sp)
+ LONG_L $7, GDB_FR_REG7(sp)
+ LONG_L $6, GDB_FR_REG6(sp)
+ LONG_L $5, GDB_FR_REG5(sp)
+ LONG_L $4, GDB_FR_REG4(sp)
+ LONG_L $3, GDB_FR_REG3(sp)
+ LONG_L $2, GDB_FR_REG2(sp)
+ LONG_L $1, GDB_FR_REG1(sp)
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
+ LONG_L k0, GDB_FR_EPC(sp)
+ LONG_L $29, GDB_FR_REG29(sp) /* Deallocate stack */
+ jr k0
+ rfe
+#else
+ LONG_L sp, GDB_FR_REG29(sp) /* Deallocate stack */
+
+ .set mips3
+ eret
+ .set mips0
+#endif
+ .set at
+ .set reorder
+ END(trap_low)
+
+LEAF(kgdb_read_byte)
+4: lb t0, (a0)
+ sb t0, (a1)
+ li v0, 0
+ jr ra
+ .section __ex_table,"a"
+ PTR 4b, kgdbfault
+ .previous
+ END(kgdb_read_byte)
+
+LEAF(kgdb_write_byte)
+5: sb a0, (a1)
+ li v0, 0
+ jr ra
+ .section __ex_table,"a"
+ PTR 5b, kgdbfault
+ .previous
+ END(kgdb_write_byte)
+
+ .type kgdbfault@function
+ .ent kgdbfault
+
+kgdbfault: li v0, -EFAULT
+ jr ra
+ .end kgdbfault
diff -Nurb linux-2.6.22-570/arch/mips/kernel/traps.c linux-2.6.22-try2/arch/mips/kernel/traps.c
--- linux-2.6.22-570/arch/mips/kernel/traps.c 2007-12-12 18:08:36.000000000 -0500
+++ linux-2.6.22-try2/arch/mips/kernel/traps.c 2007-12-19 15:29:24.000000000 -0500
@@ -10,6 +10,8 @@
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000, 01 MIPS Technologies, Inc.
* Copyright (C) 2002, 2003, 2004, 2005 Maciej W. Rozycki
+ *
+ * KGDB specific changes - Manish Lachwani (mlachwani@mvista.com)
*/
#include
#include
@@ -21,6 +23,7 @@
#include
#include
#include
+#include
#include
#include
@@ -42,6 +45,7 @@
#include
#include
#include
+#include
extern asmlinkage void handle_int(void);
extern asmlinkage void handle_tlbm(void);
@@ -1445,6 +1449,11 @@
extern char except_vec4;
unsigned long i;
+#if defined(CONFIG_KGDB)
+ if (kgdb_early_setup)
+ return; /* Already done */
+#endif
+
if (cpu_has_veic || cpu_has_vint)
ebase = (unsigned long) alloc_bootmem_low_pages (0x200 + VECTORSPACING*64);
else
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/atlas/Makefile linux-2.6.22-try2/arch/mips/mips-boards/atlas/Makefile
--- linux-2.6.22-570/arch/mips/mips-boards/atlas/Makefile 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/atlas/Makefile 2007-12-19 15:29:24.000000000 -0500
@@ -17,4 +17,3 @@
#
obj-y := atlas_int.o atlas_setup.o
-obj-$(CONFIG_KGDB) += atlas_gdb.o
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/atlas/atlas_gdb.c linux-2.6.22-try2/arch/mips/mips-boards/atlas/atlas_gdb.c
--- linux-2.6.22-570/arch/mips/mips-boards/atlas/atlas_gdb.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/atlas/atlas_gdb.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,97 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * This is the interface to the remote debugger stub.
- */
-#include
-#include
-#include
-
-#define INB(a) inb((unsigned long)a)
-#define OUTB(x,a) outb(x,(unsigned long)a)
-
-/*
- * This is the interface to the remote debugger stub
- * if the Philips part is used for the debug port,
- * called from the platform setup code.
- */
-void *saa9730_base = (void *)ATLAS_SAA9730_REG;
-
-static int saa9730_kgdb_active = 0;
-
-#define SAA9730_BAUDCLOCK(baud) (((ATLAS_SAA9730_BAUDCLOCK/(baud))/16)-1)
-
-int saa9730_kgdb_hook(int speed)
-{
- int baudclock;
- t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
-
- /*
- * Clear all interrupts
- */
- (void) INB(&kgdb_uart->Lsr);
- (void) INB(&kgdb_uart->Msr);
- (void) INB(&kgdb_uart->Thr_Rbr);
- (void) INB(&kgdb_uart->Iir_Fcr);
-
- /*
- * Now, initialize the UART
- */
- /* 8 data bits, one stop bit, no parity */
- OUTB(SAA9730_LCR_DATA8, &kgdb_uart->Lcr);
-
- baudclock = SAA9730_BAUDCLOCK(speed);
-
- OUTB((baudclock >> 16) & 0xff, &kgdb_uart->BaudDivMsb);
- OUTB( baudclock & 0xff, &kgdb_uart->BaudDivLsb);
-
- /* Set RTS/DTR active */
- OUTB(SAA9730_MCR_DTR | SAA9730_MCR_RTS, &kgdb_uart->Mcr);
- saa9730_kgdb_active = 1;
-
- return speed;
-}
-
-int saa9730_putDebugChar(char c)
-{
- t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
-
- if (!saa9730_kgdb_active) { /* need to init device first */
- return 0;
- }
-
- while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_THRE))
- ;
- OUTB(c, &kgdb_uart->Thr_Rbr);
-
- return 1;
-}
-
-char saa9730_getDebugChar(void)
-{
- t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
- char c;
-
- if (!saa9730_kgdb_active) { /* need to init device first */
- return 0;
- }
- while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_DR))
- ;
-
- c = INB(&kgdb_uart->Thr_Rbr);
- return(c);
-}
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/atlas/atlas_setup.c linux-2.6.22-try2/arch/mips/mips-boards/atlas/atlas_setup.c
--- linux-2.6.22-570/arch/mips/mips-boards/atlas/atlas_setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/atlas/atlas_setup.c 2007-12-19 15:29:24.000000000 -0500
@@ -37,10 +37,6 @@
extern void mips_time_init(void);
extern unsigned long mips_rtc_get_time(void);
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
static void __init serial_init(void);
const char *get_system_type(void)
@@ -58,9 +54,6 @@
serial_init ();
-#ifdef CONFIG_KGDB
- kgdb_config();
-#endif
mips_reboot_setup();
board_time_init = mips_time_init;
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/generic/gdb_hook.c linux-2.6.22-try2/arch/mips/mips-boards/generic/gdb_hook.c
--- linux-2.6.22-570/arch/mips/mips-boards/generic/gdb_hook.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/generic/gdb_hook.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,133 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * This is the interface to the remote debugger stub.
- */
-#include
-#include
-#include
-#include
-
-#include
-#include
-
-static struct serial_state rs_table[] = {
- SERIAL_PORT_DFNS /* Defined in serial.h */
-};
-
-static struct async_struct kdb_port_info = {0};
-
-int (*generic_putDebugChar)(char);
-char (*generic_getDebugChar)(void);
-
-static __inline__ unsigned int serial_in(struct async_struct *info, int offset)
-{
- return inb(info->port + offset);
-}
-
-static __inline__ void serial_out(struct async_struct *info, int offset,
- int value)
-{
- outb(value, info->port+offset);
-}
-
-int rs_kgdb_hook(int tty_no, int speed) {
- int t;
- struct serial_state *ser = &rs_table[tty_no];
-
- kdb_port_info.state = ser;
- kdb_port_info.magic = SERIAL_MAGIC;
- kdb_port_info.port = ser->port;
- kdb_port_info.flags = ser->flags;
-
- /*
- * Clear all interrupts
- */
- serial_in(&kdb_port_info, UART_LSR);
- serial_in(&kdb_port_info, UART_RX);
- serial_in(&kdb_port_info, UART_IIR);
- serial_in(&kdb_port_info, UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
- if (kdb_port_info.flags & ASYNC_FOURPORT) {
- kdb_port_info.MCR = UART_MCR_DTR | UART_MCR_RTS;
- t = UART_MCR_DTR | UART_MCR_OUT1;
- } else {
- kdb_port_info.MCR
- = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
- t = UART_MCR_DTR | UART_MCR_RTS;
- }
-
- kdb_port_info.MCR = t; /* no interrupts, please */
- serial_out(&kdb_port_info, UART_MCR, kdb_port_info.MCR);
-
- /*
- * and set the speed of the serial port
- */
- if (speed == 0)
- speed = 9600;
-
- t = kdb_port_info.state->baud_base / speed;
- /* set DLAB */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8 | UART_LCR_DLAB);
- serial_out(&kdb_port_info, UART_DLL, t & 0xff);/* LS of divisor */
- serial_out(&kdb_port_info, UART_DLM, t >> 8); /* MS of divisor */
- /* reset DLAB */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8);
-
- return speed;
-}
-
-int putDebugChar(char c)
-{
- return generic_putDebugChar(c);
-}
-
-char getDebugChar(void)
-{
- return generic_getDebugChar();
-}
-
-int rs_putDebugChar(char c)
-{
-
- if (!kdb_port_info.state) { /* need to init device first */
- return 0;
- }
-
- while ((serial_in(&kdb_port_info, UART_LSR) & UART_LSR_THRE) == 0)
- ;
-
- serial_out(&kdb_port_info, UART_TX, c);
-
- return 1;
-}
-
-char rs_getDebugChar(void)
-{
- if (!kdb_port_info.state) { /* need to init device first */
- return 0;
- }
-
- while (!(serial_in(&kdb_port_info, UART_LSR) & 1))
- ;
-
- return serial_in(&kdb_port_info, UART_RX);
-}
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/generic/init.c linux-2.6.22-try2/arch/mips/mips-boards/generic/init.c
--- linux-2.6.22-570/arch/mips/mips-boards/generic/init.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/generic/init.c 2007-12-19 15:29:24.000000000 -0500
@@ -37,15 +37,6 @@
#include
-#ifdef CONFIG_KGDB
-extern int rs_kgdb_hook(int, int);
-extern int rs_putDebugChar(char);
-extern char rs_getDebugChar(void);
-extern int saa9730_kgdb_hook(int);
-extern int saa9730_putDebugChar(char);
-extern char saa9730_getDebugChar(void);
-#endif
-
int prom_argc;
int *_prom_argv, *_prom_envp;
@@ -173,59 +164,6 @@
}
#endif
-#ifdef CONFIG_KGDB
-void __init kgdb_config (void)
-{
- extern int (*generic_putDebugChar)(char);
- extern char (*generic_getDebugChar)(void);
- char *argptr;
- int line, speed;
-
- argptr = prom_getcmdline();
- if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
- argptr += strlen("kgdb=ttyS");
- if (*argptr != '0' && *argptr != '1')
- printk("KGDB: Unknown serial line /dev/ttyS%c, "
- "falling back to /dev/ttyS1\n", *argptr);
- line = *argptr == '0' ? 0 : 1;
- printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
-
- speed = 0;
- if (*++argptr == ',')
- {
- int c;
- while ((c = *++argptr) && ('0' <= c && c <= '9'))
- speed = speed * 10 + c - '0';
- }
-#ifdef CONFIG_MIPS_ATLAS
- if (line == 1) {
- speed = saa9730_kgdb_hook(speed);
- generic_putDebugChar = saa9730_putDebugChar;
- generic_getDebugChar = saa9730_getDebugChar;
- }
- else
-#endif
- {
- speed = rs_kgdb_hook(line, speed);
- generic_putDebugChar = rs_putDebugChar;
- generic_getDebugChar = rs_getDebugChar;
- }
-
- pr_info("KGDB: Using serial line /dev/ttyS%d at %d for "
- "session, please connect your debugger\n",
- line ? 1 : 0, speed);
-
- {
- char *s;
- for (s = "Please connect GDB to this port\r\n"; *s; )
- generic_putDebugChar (*s++);
- }
-
- /* Breakpoint is invoked after interrupts are initialised */
- }
-}
-#endif
-
void __init mips_nmi_setup (void)
{
void *base;
diff -Nurb linux-2.6.22-570/arch/mips/mips-boards/malta/malta_setup.c linux-2.6.22-try2/arch/mips/mips-boards/malta/malta_setup.c
--- linux-2.6.22-570/arch/mips/mips-boards/malta/malta_setup.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mips-boards/malta/malta_setup.c 2007-12-19 15:29:24.000000000 -0500
@@ -39,10 +39,6 @@
extern void mips_time_init(void);
extern unsigned long mips_rtc_get_time(void);
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
struct resource standard_io_resources[] = {
{ .name = "dma1", .start = 0x00, .end = 0x1f, .flags = IORESOURCE_BUSY },
{ .name = "timer", .start = 0x40, .end = 0x5f, .flags = IORESOURCE_BUSY },
@@ -99,10 +95,6 @@
*/
enable_dma(4);
-#ifdef CONFIG_KGDB
- kgdb_config ();
-#endif
-
if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) {
char *argptr;
diff -Nurb linux-2.6.22-570/arch/mips/mm/extable.c linux-2.6.22-try2/arch/mips/mm/extable.c
--- linux-2.6.22-570/arch/mips/mm/extable.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-try2/arch/mips/mm/extable.c 2007-12-19 15:29:24.000000000 -0500
@@ -3,6 +3,7 @@
*/
#include