1 # $Id: config.in,v 1.113 2002/01/24 22:14:44 davem Exp $
2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux/SPARC Kernel Configuration"
20 config GENERIC_ISA_DMA
33 If you say Y here, you will get support for terminal devices with
34 display and keyboard devices. These are called "virtual" because you
35 can run several virtual terminals (also called virtual consoles) on
36 one physical terminal. This is rather useful, for example one
37 virtual terminal can collect system messages and warnings, another
38 one can be used for a text-mode user session, and a third could run
39 an X session, all in parallel. Switching between virtual terminals
40 is done with certain key combinations, usually Alt-<function key>.
42 The setterm command ("man setterm") can be used to change the
43 properties (such as colors or beeping) of a virtual terminal. The
44 man page console_codes(4) ("man console_codes") contains the special
45 character sequences that can be used to change those properties
46 directly. The fonts used on virtual terminals can be changed with
47 the setfont ("man setfont") command and the key bindings are defined
48 with the loadkeys ("man loadkeys") command.
50 You need at least one virtual terminal device in order to make use
51 of your keyboard and monitor. Therefore, only people configuring an
52 embedded system would want to say N here in order to save some
53 memory; the only way to log into such a system is then via a serial
54 or network connection.
56 If unsure, say Y, or else you won't be able to do much with your new
57 shiny Linux system :-)
63 The system console is the device which receives all kernel messages
64 and warnings and which allows logins in single user mode. If you
65 answer Y here, a virtual terminal (the device used to interact with
66 a physical terminal) can be used as system console. This is the most
67 common mode of operations, so you should say Y here unless you want
68 the kernel messages be output only to a serial port (in which case
69 you should say Y to "Console on serial port", below).
71 If you do say Y here, by default the currently visible virtual
72 terminal (/dev/tty0) will be used as system console. You can change
73 that with a kernel command line option such as "console=tty3" which
74 would use the third virtual terminal as system console. (Try "man
75 bootparam" or see the documentation of your boot loader (lilo or
76 loadlin) about how to pass options to the kernel at boot time.)
85 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
87 This enables support for systems with more than one CPU. If you have
88 a system with only one CPU, like most personal computers, say N. If
89 you have a system with more than one CPU, say Y.
91 If you say N here, the kernel will run on single and multiprocessor
92 machines, but will use only one CPU of a multiprocessor machine. If
93 you say Y here, the kernel will run on many, but not all,
94 singleprocessor machines. On a singleprocessor machine, the kernel
95 will run faster if you say N here.
97 Note that if you say Y here and choose architecture "586" or
98 "Pentium" under "Processor family", the kernel will not work on 486
99 architectures. Similarly, multiprocessor kernels for the "PPro"
100 architecture may not work on all Pentium based boards.
102 People using multiprocessor machines who say Y here should also say
103 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
104 Management" code will be disabled if you say Y here.
106 See also the <file:Documentation/smp.txt>,
107 <file:Documentation/i386/IO-APIC.txt>,
108 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
109 <http://www.tldp.org/docs.html#howto>.
111 If you don't know what to do here, say N.
114 int "Maximum number of CPUs (2-32)"
119 # Identify this as a Sparc32 build
124 SPARC is a family of RISC microprocessors designed and marketed by
125 Sun Microsystems, incorporated. They are very widely found in Sun
126 workstations and clones. This port covers the original 32-bit SPARC;
127 it is old and stable and usually considered one of the "big three"
128 along with the Intel and Alpha ports. The UltraLinux project
129 maintains both the SPARC32 and SPARC64 ports; its web page is
130 available at <http://www.ultralinux.org/>.
132 # Global things across all Sun machines.
136 ISA is found on Espresso only and is not supported currently.
142 EISA is not supported.
148 MCA is not supported.
154 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
155 computer. These are credit-card size devices such as network cards,
156 modems or hard drives often used with laptops computers. There are
157 actually two varieties of these cards: the older 16 bit PCMCIA cards
158 and the newer 32 bit CardBus cards. If you want to use CardBus
159 cards, you need to say Y here and also to "CardBus support" below.
161 To use your PC-cards, you will need supporting software from David
162 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
163 for location). Please also read the PCMCIA-HOWTO, available from
164 <http://www.tldp.org/docs.html#howto>.
166 To compile this driver as modules, choose M here: the
167 modules will be called pcmcia_core and ds.
177 config SERIAL_CONSOLE
181 If you say Y here, it will be possible to use a serial port as the
182 system console (the system console is the device which receives all
183 kernel messages and warnings and which allows logins in single user
184 mode). This could be useful if some terminal or printer is connected
187 Even if you say Y here, the currently visible virtual console
188 (/dev/tty0) will still be used as the system console by default, but
189 you can alter that using a kernel command line option such as
190 "console=ttyS1". (Try "man bootparam" or see the documentation of
191 your boot loader (lilo or loadlin) about how to pass options to the
192 kernel at boot time.)
194 If you don't have a VGA card installed and you say Y here, the
195 kernel will automatically use the first serial line, /dev/ttyS0, as
208 config RWSEM_GENERIC_SPINLOCK
212 config RWSEM_XCHGADD_ALGORITHM
219 Enable power management and CPU standby features on supported
223 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
225 Say Y here if, and only if, your machine is a sun4. Note that
226 a kernel compiled with this option will run only on sun4.
227 (And the current version will probably work only on sun4/330.)
232 bool "Support for PCI and PS/2 keyboard/mouse"
234 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
235 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
236 All of these platforms are extremely obscure, so say N if unsure.
238 source "drivers/pci/Kconfig"
242 config SUN_OPENPROMFS
243 tristate "Openprom tree appears in /proc/openprom"
245 If you say Y, the OpenPROM device tree will be available as a
246 virtual file system, which you can mount to /proc/openprom by "mount
247 -t openpromfs none /proc/openprom".
249 To compile the /proc/openprom support as a module, choose M here: the
250 module will be called openpromfs. If unsure, choose M.
252 source "fs/Kconfig.binfmt"
255 bool "SunOS binary emulation"
257 This allows you to run most SunOS binaries. If you want to do this,
258 say Y here and place appropriate files in /usr/gnemul/sunos. See
259 <http://www.ultralinux.org/faq.html> for more information. If you
260 want to run SunOS binaries on an Ultra you must also say Y to
261 "Kernel support for 32-bit a.out binaries" above.
263 source "drivers/parport/Kconfig"
266 tristate "Parallel printer support"
269 If you intend to attach a printer to the parallel port of your Linux
270 box (as opposed to using a serial printer; if the connector at the
271 printer has 9 or 25 holes ["female"], then it's serial), say Y.
272 Also read the Printing-HOWTO, available from
273 <http://www.tldp.org/docs.html#howto>.
275 It is possible to share one parallel port among several devices
276 (e.g. printer and ZIP drive) and it is safe to compile the
277 corresponding drivers into the kernel. If you want to compile this
278 driver as a module however, choose M here and read
279 <file:Documentation/parport.txt>. The module will be called lp.
281 If you have several parallel ports, you can specify which ports to
282 use with the "lp" kernel command line option. (Try "man bootparam"
283 or see the documentation of your boot loader (lilo or loadlin) about
284 how to pass options to the kernel at boot time.) The syntax of the
285 "lp" command line option can be found in <file:drivers/char/lp.c>.
287 If you have more than 8 printers, you need to increase the LP_NO
288 macro in lp.c and the PARPORT_MAX macro in parport.h.
292 source "drivers/base/Kconfig"
294 source "drivers/video/Kconfig"
296 source "drivers/mtd/Kconfig"
298 source "drivers/serial/Kconfig"
301 source "drivers/sbus/char/Kconfig"
304 source "drivers/block/Kconfig"
306 # Don't frighten a common SBus user
309 source "drivers/ide/Kconfig"
313 source "drivers/isdn/Kconfig"
315 source "drivers/scsi/Kconfig"
317 source "drivers/fc4/Kconfig"
319 source "drivers/md/Kconfig"
323 # This one must be before the filesystem configs. -DaveM
325 menu "Unix98 PTY support"
328 bool "Unix98 PTY support"
330 A pseudo terminal (PTY) is a software device consisting of two
331 halves: a master and a slave. The slave device behaves identical to
332 a physical terminal; the master device is used by a process to
333 read data from and write data to the slave, thereby emulating a
334 terminal. Typical programs for the master side are telnet servers
337 Linux has traditionally used the BSD-like names /dev/ptyxx for
338 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
339 has a number of problems. The GNU C library glibc 2.1 and later,
340 however, supports the Unix98 naming standard: in order to acquire a
341 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
342 terminal is then made available to the process and the pseudo
343 terminal slave can be accessed as /dev/pts/<number>. What was
344 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
346 The entries in /dev/pts/ are created on the fly by a virtual
347 file system; therefore, if you say Y here you should say Y to
348 "/dev/pts file system for Unix98 PTYs" as well.
350 If you want to say Y here, you need to have the C library glibc 2.1
351 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
352 Read the instructions in <file:Documentation/Changes> pertaining to
353 pseudo terminals. It's safe to say N.
355 config UNIX98_PTY_COUNT
356 int "Maximum number of Unix98 PTYs in use (0-2048)"
357 depends on UNIX98_PTYS
360 The maximum number of Unix98 PTYs that can be used at any one time.
361 The default is 256, and should be enough for desktop systems. Server
362 machines which support incoming telnet/rlogin/ssh connections and/or
363 serve several X terminals may want to increase this: every incoming
364 connection and every xterm uses up one PTY.
366 When not in use, each additional set of 256 PTYs occupy
367 approximately 8 KB of kernel memory on 32-bit architectures.
371 source "drivers/input/Kconfig"
375 source "sound/Kconfig"
377 source "drivers/usb/Kconfig"
379 source "drivers/char/watchdog/Kconfig"
381 menu "Kernel hacking"
384 bool "Kernel debugging"
386 Say Y here if you are developing drivers or trying to debug and
387 identify kernel problems.
389 config DEBUG_STACK_USAGE
390 bool "Enable stack utilization instrumentation"
391 depends on DEBUG_KERNEL
393 Enables the display of the minimum amount of free stack which each
394 task has ever had available in the sysrq-T and sysrq-P debug output.
396 This option will slow down process creation somewhat.
399 bool "Debug memory allocations"
400 depends on DEBUG_KERNEL
402 Say Y here to have the kernel do limited verification on memory
403 allocation as well as poisoning memory on free to catch use of freed
407 bool "Magic SysRq key"
408 depends on DEBUG_KERNEL
410 If you say Y here, you will have some control over the system even
411 if the system crashes for example during kernel debugging (e.g., you
412 will be able to flush the buffer cache to disk, reboot the system
413 immediately or dump some status information). This is accomplished
414 by pressing various keys while holding SysRq (Alt+PrintScreen). It
415 also works on a serial console (on PC hardware at least), if you
416 send a BREAK and then within 5 seconds a command keypress. The
417 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
418 unless you really know what this hack does.
420 config DEBUG_SPINLOCK
421 bool "Spinlock debugging"
422 depends on DEBUG_KERNEL
424 Say Y here and build SMP to catch missing spinlock initialization
425 and certain other kinds of spinlock errors commonly made. This is
426 best used in conjunction with the NMI watchdog so that spinlock
427 deadlocks are also debuggable.
430 bool "Highmem debugging"
431 depends on DEBUG_KERNEL && HIGHMEM
433 This options enables additional error checking for high memory
434 systems. Disable for production systems.
436 config DEBUG_SPINLOCK_SLEEP
437 bool "Sleep-inside-spinlock checking"
438 depends on DEBUG_KERNEL
440 If you say Y here, various routines which may sleep will become very
441 noisy if they are called with a spinlock held.
443 config DEBUG_BUGVERBOSE
444 bool "Verbose BUG() reporting (adds 70K)"
445 depends on DEBUG_KERNEL
447 Say Y here to make BUG() panics output the file name and line number
448 of the BUG call as well as the EIP and oops trace. This aids
449 debugging but costs about 70-100K of memory.
453 source "security/Kconfig"
455 source "crypto/Kconfig"