diff options
Diffstat (limited to 'arch/ia64/kernel/setup.c')
| -rw-r--r-- | arch/ia64/kernel/setup.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index d10404a4175..14e1200376a 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -43,6 +43,8 @@ #include <linux/initrd.h> #include <linux/pm.h> #include <linux/cpufreq.h> +#include <linux/kexec.h> +#include <linux/crash_dump.h> #include <asm/ia32.h> #include <asm/machvec.h> @@ -252,6 +254,41 @@ reserve_memory (void) efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); n++; +#ifdef CONFIG_KEXEC + /* crashkernel=size@offset specifies the size to reserve for a crash + * kernel.(offset is ingored for keep compatibility with other archs) + * By reserving this memory we guarantee that linux never set's it + * up as a DMA target.Useful for holding code to do something + * appropriate after a kernel panic. + */ + { + char *from = strstr(saved_command_line, "crashkernel="); + unsigned long base, size; + if (from) { + size = memparse(from + 12, &from); + if (size) { + sort_regions(rsvd_region, n); + base = kdump_find_rsvd_region(size, + rsvd_region, n); + if (base != ~0UL) { + rsvd_region[n].start = + (unsigned long)__va(base); + rsvd_region[n].end = + (unsigned long)__va(base + size); + n++; + crashk_res.start = base; + crashk_res.end = base + size - 1; + } + } + } + efi_memmap_res.start = ia64_boot_param->efi_memmap; + efi_memmap_res.end = efi_memmap_res.start + + ia64_boot_param->efi_memmap_size; + boot_param_res.start = __pa(ia64_boot_param); + boot_param_res.end = boot_param_res.start + + sizeof(*ia64_boot_param); + } +#endif /* end of memory marker */ rsvd_region[n].start = ~0UL; rsvd_region[n].end = ~0UL; @@ -263,6 +300,7 @@ reserve_memory (void) sort_regions(rsvd_region, num_rsvd_regions); } + /** * find_initrd - get initrd parameters from the boot parameter structure * |