1 files changed, 38 insertions, 0 deletions

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index d10404a41756..14e1200376a9 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
  *