#undef DEBUG_PROM
#include <stdarg.h>
+#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
static unsigned long __initdata prom_tce_alloc_end;
#endif
-/* Platforms codes are now obsolete in the kernel. Now only used within this
- * file and ultimately gone too. Feel free to change them if you need, they
- * are not shared with anything outside of this file anymore
- */
-#define PLATFORM_PSERIES 0x0100
-#define PLATFORM_PSERIES_LPAR 0x0101
-#define PLATFORM_LPAR 0x0001
-#define PLATFORM_POWERMAC 0x0400
-#define PLATFORM_GENERIC 0x0500
-
static int __initdata of_platform;
static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
+static unsigned long __initdata prom_memory_limit;
+
static unsigned long __initdata alloc_top;
static unsigned long __initdata alloc_top_high;
static unsigned long __initdata alloc_bottom;
static unsigned long __initdata rmo_top;
static unsigned long __initdata ram_top;
+#ifdef CONFIG_KEXEC
+static unsigned long __initdata prom_crashk_base;
+static unsigned long __initdata prom_crashk_size;
+#endif
+
static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
static int __initdata mem_reserve_cnt;
reason = PTRRELOC(reason);
#endif
prom_print(reason);
- /* Do not call exit because it clears the screen on pmac
- * it also causes some sort of double-fault on early pmacs */
- if (RELOC(of_platform) == PLATFORM_POWERMAC)
- asm("trap\n");
-
/* ToDo: should put up an SRC here on p/iSeries */
call_prom("exit", 0, 0);
static void __init early_cmdline_parse(void)
{
struct prom_t *_prom = &RELOC(prom);
-#ifdef CONFIG_PPC64
const char *opt;
-#endif
char *p;
int l = 0;
if ((long)_prom->chosen > 0)
l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
#ifdef CONFIG_CMDLINE
- if (l <= 0 || p[0] == '\0') /* dbl check */
+ if (l == 0) /* dbl check */
strlcpy(RELOC(prom_cmd_line),
RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
#endif /* CONFIG_CMDLINE */
RELOC(iommu_force_on) = 1;
}
#endif
-}
-#ifdef CONFIG_PPC_PSERIES
-/*
- * There are two methods for telling firmware what our capabilities are.
- * Newer machines have an "ibm,client-architecture-support" method on the
- * root node. For older machines, we have to call the "process-elf-header"
- * method in the /packages/elf-loader node, passing it a fake 32-bit
- * ELF header containing a couple of PT_NOTE sections that contain
- * structures that contain various information.
- */
+ opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
+ if (opt) {
+ opt += 4;
+ RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
+#ifdef CONFIG_PPC64
+ /* Align to 16 MB == size of ppc64 large page */
+ RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
+#endif
+ }
-/*
- * New method - extensible architecture description vector.
- *
- * Because the description vector contains a mix of byte and word
- * values, we declare it as an unsigned char array, and use this
- * macro to put word values in.
- */
-#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
- ((x) >> 8) & 0xff, (x) & 0xff
-
-/* Option vector bits - generic bits in byte 1 */
-#define OV_IGNORE 0x80 /* ignore this vector */
-#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
-
-/* Option vector 1: processor architectures supported */
-#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
-#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
-#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
-#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
-#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
-#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
-
-/* Option vector 2: Open Firmware options supported */
-#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
-
-/* Option vector 3: processor options supported */
-#define OV3_FP 0x80 /* floating point */
-#define OV3_VMX 0x40 /* VMX/Altivec */
-
-/* Option vector 5: PAPR/OF options supported */
-#define OV5_LPAR 0x80 /* logical partitioning supported */
-#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
-/* ibm,dynamic-reconfiguration-memory property supported */
-#define OV5_DRCONF_MEMORY 0x20
-#define OV5_LARGE_PAGES 0x10 /* large pages supported */
+#ifdef CONFIG_KEXEC
+ /*
+ * crashkernel=size@addr specifies the location to reserve for
+ * crash kernel.
+ */
+ opt = strstr(RELOC(prom_cmd_line), RELOC("crashkernel="));
+ if (opt) {
+ opt += 12;
+ RELOC(prom_crashk_size) =
+ prom_memparse(opt, (const char **)&opt);
+
+ if (ALIGN(RELOC(prom_crashk_size), 0x1000000) !=
+ RELOC(prom_crashk_size)) {
+ prom_printf("Warning: crashkernel size is not "
+ "aligned to 16MB\n");
+ }
+ /*
+ * At present, the crash kernel always run at 32MB.
+ * Just ignore whatever user passed.
+ */
+ RELOC(prom_crashk_base) = 0x2000000;
+ if (*opt == '@') {
+ prom_printf("Warning: PPC64 kdump kernel always runs "
+ "at 32 MB\n");
+ }
+ }
+#endif
+}
+
+#ifdef CONFIG_PPC_PSERIES
/*
- * The architecture vector has an array of PVR mask/value pairs,
- * followed by # option vectors - 1, followed by the option vectors.
+ * To tell the firmware what our capabilities are, we have to pass
+ * it a fake 32-bit ELF header containing a couple of PT_NOTE sections
+ * that contain structures that contain the actual values.
*/
-static unsigned char ibm_architecture_vec[] = {
- W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
- W(0xffff0000), W(0x003e0000), /* POWER6 */
- W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
- 5 - 1, /* 5 option vectors */
-
- /* option vector 1: processor architectures supported */
- 3 - 2, /* length */
- 0, /* don't ignore, don't halt */
- OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
- OV1_PPC_2_04 | OV1_PPC_2_05,
-
- /* option vector 2: Open Firmware options supported */
- 34 - 2, /* length */
- OV2_REAL_MODE,
- 0, 0,
- W(0xffffffff), /* real_base */
- W(0xffffffff), /* real_size */
- W(0xffffffff), /* virt_base */
- W(0xffffffff), /* virt_size */
- W(0xffffffff), /* load_base */
- W(64), /* 128MB min RMA */
- W(0xffffffff), /* full client load */
- 0, /* min RMA percentage of total RAM */
- 48, /* max log_2(hash table size) */
-
- /* option vector 3: processor options supported */
- 3 - 2, /* length */
- 0, /* don't ignore, don't halt */
- OV3_FP | OV3_VMX,
-
- /* option vector 4: IBM PAPR implementation */
- 2 - 2, /* length */
- 0, /* don't halt */
-
- /* option vector 5: PAPR/OF options */
- 3 - 2, /* length */
- 0, /* don't ignore, don't halt */
- OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES,
-};
-
-/* Old method - ELF header with PT_NOTE sections */
static struct fake_elf {
Elf32_Ehdr elfhdr;
Elf32_Phdr phdr[2];
static void __init prom_send_capabilities(void)
{
- ihandle elfloader, root;
- prom_arg_t ret;
-
- root = call_prom("open", 1, 1, ADDR("/"));
- if (root != 0) {
- /* try calling the ibm,client-architecture-support method */
- if (call_prom_ret("call-method", 3, 2, &ret,
- ADDR("ibm,client-architecture-support"),
- root,
- ADDR(ibm_architecture_vec)) == 0) {
- /* the call exists... */
- if (ret)
- prom_printf("WARNING: ibm,client-architecture"
- "-support call FAILED!\n");
- call_prom("close", 1, 0, root);
- return;
- }
- call_prom("close", 1, 0, root);
- }
+ ihandle elfloader;
- /* no ibm,client-architecture-support call, try the old way */
elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
if (elfloader == 0) {
prom_printf("couldn't open /packages/elf-loader\n");
}
/*
- * Initialize memory allocation mechanism, parse "memory" nodes and
+ * Initialize memory allocation mecanism, parse "memory" nodes and
* obtain that way the top of memory and RMO to setup out local allocator
*/
static void __init prom_init_mem(void)
RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
}
+ /*
+ * If prom_memory_limit is set we reduce the upper limits *except* for
+ * alloc_top_high. This must be the real top of RAM so we can put
+ * TCE's up there.
+ */
+
+ RELOC(alloc_top_high) = RELOC(ram_top);
+
+ if (RELOC(prom_memory_limit)) {
+ if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
+ prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
+ RELOC(prom_memory_limit));
+ RELOC(prom_memory_limit) = 0;
+ } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
+ prom_printf("Ignoring mem=%x >= ram_top.\n",
+ RELOC(prom_memory_limit));
+ RELOC(prom_memory_limit) = 0;
+ } else {
+ RELOC(ram_top) = RELOC(prom_memory_limit);
+ RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
+ }
+ }
+
/*
* Setup our top alloc point, that is top of RMO or top of
* segment 0 when running non-LPAR.
RELOC(rmo_top) = RELOC(ram_top);
RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
RELOC(alloc_top) = RELOC(rmo_top);
- RELOC(alloc_top_high) = RELOC(ram_top);
prom_printf("memory layout at init:\n");
+ prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
prom_printf(" ram_top : %x\n", RELOC(ram_top));
+#ifdef CONFIG_KEXEC
+ if (RELOC(prom_crashk_base)) {
+ prom_printf(" crashk_base : %x\n", RELOC(prom_crashk_base));
+ prom_printf(" crashk_size : %x\n", RELOC(prom_crashk_size));
+ }
+#endif
}
if (call_prom_ret("call-method", 3, 2, &entry,
ADDR("instantiate-rtas"),
- rtas_inst, base) == PROM_ERROR
+ rtas_inst, base) != 0
|| entry == 0) {
prom_printf(" failed\n");
return;
reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
- /* These are only really needed if there is a memory limit in
- * effect, but we don't know so export them always. */
- RELOC(prom_tce_alloc_start) = local_alloc_bottom;
- RELOC(prom_tce_alloc_end) = local_alloc_top;
+ if (RELOC(prom_memory_limit)) {
+ /*
+ * We align the start to a 16MB boundary so we can map
+ * the TCE area using large pages if possible.
+ * The end should be the top of RAM so no need to align it.
+ */
+ RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom,
+ 0x1000000);
+ RELOC(prom_tce_alloc_end) = local_alloc_top;
+ }
/* Flag the first invalid entry */
prom_debug("ending prom_initialize_tce_table\n");
int len, i = 0;
#ifdef CONFIG_PPC64
phandle rtas;
- int x;
#endif
-
- /* Look for a PowerMac */
len = prom_getprop(_prom->root, "compatible",
compat, sizeof(compat)-1);
if (len > 0) {
strstr(p, RELOC("MacRISC")))
return PLATFORM_POWERMAC;
#ifdef CONFIG_PPC64
- /* We must make sure we don't detect the IBM Cell
- * blades as pSeries due to some firmware issues,
- * so we do it here.
- */
- if (strstr(p, RELOC("IBM,CBEA")) ||
- strstr(p, RELOC("IBM,CPBW-1.0")))
- return PLATFORM_GENERIC;
-#endif /* CONFIG_PPC64 */
+ if (strstr(p, RELOC("Momentum,Maple")))
+ return PLATFORM_MAPLE;
+ if (strstr(p, RELOC("IBM,CPB")))
+ return PLATFORM_CELL;
+#endif
i += sl + 1;
}
}
#ifdef CONFIG_PPC64
- /* If not a mac, try to figure out if it's an IBM pSeries or any other
- * PAPR compliant platform. We assume it is if :
- * - /device_type is "chrp" (please, do NOT use that for future
- * non-IBM designs !
- * - it has /rtas
- */
- len = prom_getprop(_prom->root, "device_type",
- compat, sizeof(compat)-1);
- if (len <= 0)
- return PLATFORM_GENERIC;
- if (strcmp(compat, RELOC("chrp")))
- return PLATFORM_GENERIC;
-
/* Default to pSeries. We need to know if we are running LPAR */
rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
- if (!PHANDLE_VALID(rtas))
- return PLATFORM_GENERIC;
- x = prom_getproplen(rtas, "ibm,hypertas-functions");
- if (x != PROM_ERROR) {
- prom_printf("Hypertas detected, assuming LPAR !\n");
- return PLATFORM_PSERIES_LPAR;
+ if (PHANDLE_VALID(rtas)) {
+ int x = prom_getproplen(rtas, "ibm,hypertas-functions");
+ if (x != PROM_ERROR) {
+ prom_printf("Hypertas detected, assuming LPAR !\n");
+ return PLATFORM_PSERIES_LPAR;
+ }
}
return PLATFORM_PSERIES;
#else
- return PLATFORM_GENERIC;
+ return PLATFORM_CHRP;
#endif
}
/* Version 16 is not backward compatible */
hdr->last_comp_version = 0x10;
- /* Copy the reserve map in */
+ /* Reserve the whole thing and copy the reserve map in, we
+ * also bump mem_reserve_cnt to cause further reservations to
+ * fail since it's too late.
+ */
+ reserve_mem(RELOC(dt_header_start), hdr->totalsize);
memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
#ifdef DEBUG_PROM
RELOC(mem_reserve_map)[i].size);
}
#endif
- /* Bump mem_reserve_cnt to cause further reservations to fail
- * since it's too late.
- */
RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
prom_printf("Device tree strings 0x%x -> 0x%x\n",
}
-#ifdef CONFIG_PPC_MAPLE
-/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
- * The values are bad, and it doesn't even have the right number of cells. */
-static void __init fixup_device_tree_maple(void)
-{
- phandle isa;
- u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
- u32 isa_ranges[6];
- char *name;
-
- name = "/ht@0/isa@4";
- isa = call_prom("finddevice", 1, 1, ADDR(name));
- if (!PHANDLE_VALID(isa)) {
- name = "/ht@0/isa@6";
- isa = call_prom("finddevice", 1, 1, ADDR(name));
- rloc = 0x01003000; /* IO space; PCI device = 6 */
- }
- if (!PHANDLE_VALID(isa))
- return;
-
- if (prom_getproplen(isa, "ranges") != 12)
- return;
- if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
- == PROM_ERROR)
- return;
-
- if (isa_ranges[0] != 0x1 ||
- isa_ranges[1] != 0xf4000000 ||
- isa_ranges[2] != 0x00010000)
- return;
-
- prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
- isa_ranges[0] = 0x1;
- isa_ranges[1] = 0x0;
- isa_ranges[2] = rloc;
- isa_ranges[3] = 0x0;
- isa_ranges[4] = 0x0;
- isa_ranges[5] = 0x00010000;
- prom_setprop(isa, name, "ranges",
- isa_ranges, sizeof(isa_ranges));
-}
-#else
-#define fixup_device_tree_maple()
-#endif
-
-#ifdef CONFIG_PPC_CHRP
-/* Pegasos lacks the "ranges" property in the isa node */
-static void __init fixup_device_tree_chrp(void)
+static void __init fixup_device_tree(void)
{
- phandle isa;
- u32 isa_ranges[6];
- char *name;
- int rc;
-
- name = "/pci@80000000/isa@c";
- isa = call_prom("finddevice", 1, 1, ADDR(name));
- if (!PHANDLE_VALID(isa))
- return;
-
- rc = prom_getproplen(isa, "ranges");
- if (rc != 0 && rc != PROM_ERROR)
- return;
-
- prom_printf("Fixing up missing ISA range on Pegasos...\n");
-
- isa_ranges[0] = 0x1;
- isa_ranges[1] = 0x0;
- isa_ranges[2] = 0x01006000;
- isa_ranges[3] = 0x0;
- isa_ranges[4] = 0x0;
- isa_ranges[5] = 0x00010000;
- prom_setprop(isa, name, "ranges",
- isa_ranges, sizeof(isa_ranges));
-}
-#else
-#define fixup_device_tree_chrp()
-#endif
-
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
-static void __init fixup_device_tree_pmac(void)
-{
phandle u3, i2c, mpic;
u32 u3_rev;
u32 interrupts[2];
parent = (u32)mpic;
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
&parent, sizeof(parent));
-}
-#else
-#define fixup_device_tree_pmac()
#endif
-
-static void __init fixup_device_tree(void)
-{
- fixup_device_tree_maple();
- fixup_device_tree_chrp();
- fixup_device_tree_pmac();
}
+
static void __init prom_find_boot_cpu(void)
{
struct prom_t *_prom = &RELOC(prom);
{
struct prom_t *_prom;
unsigned long hdr;
+ u32 getprop_rval;
unsigned long offset = reloc_offset();
#ifdef CONFIG_PPC32
*/
prom_init_stdout();
- /*
- * Get default machine type. At this point, we do not differentiate
- * between pSeries SMP and pSeries LPAR
- */
- RELOC(of_platform) = prom_find_machine_type();
-
/* Bail if this is a kdump kernel. */
if (PHYSICAL_START > 0)
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
*/
prom_check_initrd(r3, r4);
+ /*
+ * Get default machine type. At this point, we do not differentiate
+ * between pSeries SMP and pSeries LPAR
+ */
+ RELOC(of_platform) = prom_find_machine_type();
+ getprop_rval = RELOC(of_platform);
+ prom_setprop(_prom->chosen, "/chosen", "linux,platform",
+ &getprop_rval, sizeof(getprop_rval));
+
#ifdef CONFIG_PPC_PSERIES
/*
* On pSeries, inform the firmware about our capabilities
*/
prom_init_mem();
+#ifdef CONFIG_KEXEC
+ if (RELOC(prom_crashk_base))
+ reserve_mem(RELOC(prom_crashk_base), RELOC(prom_crashk_size));
+#endif
/*
* Determine which cpu is actually running right _now_
*/
/*
* Fill in some infos for use by the kernel later on
*/
+ if (RELOC(prom_memory_limit))
+ prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit",
+ &RELOC(prom_memory_limit),
+ sizeof(prom_memory_limit));
#ifdef CONFIG_PPC64
if (RELOC(ppc64_iommu_off))
prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
}
#endif
+#ifdef CONFIG_KEXEC
+ if (RELOC(prom_crashk_base)) {
+ prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-base",
+ PTRRELOC(&prom_crashk_base),
+ sizeof(RELOC(prom_crashk_base)));
+ prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-size",
+ PTRRELOC(&prom_crashk_size),
+ sizeof(RELOC(prom_crashk_size)));
+ }
+#endif
/*
* Fixup any known bugs in the device-tree
*/
git://git.onelab.eu / linux-2.6.git / blobdiff