diff options
author | Michael Ellerman <michael@ellerman.id.au> | 2005-12-04 18:39:48 +1100 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 14:52:31 +1100 |
commit | dcee30361d25ea83499a99f921f9a56b4a1a79e7 (patch) | |
tree | 3ec01e42ba916047c370925e6d8ede1ae96293bf /arch | |
parent | cc53291521701f9c7c7265bbb3c140563174d8b2 (diff) | |
download | linux-dcee30361d25ea83499a99f921f9a56b4a1a79e7.tar.bz2 |
[PATCH] powerpc: Parse crashkernel= parameter in first kernel
This patch adds code to parse and setup the crash kernel resource in the
first kernel. PPC64 ignores the @x part, we always run at 32 MB.
Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/kernel/prom.c | 11 | ||||
-rw-r--r-- | arch/powerpc/kernel/prom_init.c | 53 |
2 files changed, 64 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 9aac77ca3167..fddc9c13bff5 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -29,6 +29,7 @@ #include <linux/initrd.h> #include <linux/bitops.h> #include <linux/module.h> +#include <linux/kexec.h> #include <asm/prom.h> #include <asm/rtas.h> @@ -1198,6 +1199,16 @@ static int __init early_init_dt_scan_chosen(unsigned long node, } #endif /* CONFIG_PPC_RTAS */ +#ifdef CONFIG_KEXEC + lprop = (u64*)of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); + if (lprop) + crashk_res.start = *lprop; + + lprop = (u64*)of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); + if (lprop) + crashk_res.end = crashk_res.start + *lprop - 1; +#endif + /* break now */ return 1; } diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 369e1a6cdd40..2ae860c306d7 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -192,6 +192,11 @@ 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; @@ -590,6 +595,34 @@ static void __init early_cmdline_parse(void) RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); #endif } + +#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, &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 @@ -1011,6 +1044,12 @@ static void __init prom_init_mem(void) 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 } @@ -2094,6 +2133,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, */ 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_ */ @@ -2150,6 +2193,16 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, } #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 */ |