sh: add dynamic crash base address support

Add support for dynamic crash kernel base address.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 5767f0a..e7152cc 100644 (file)
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -147,6 +147,7 @@ static void __init reserve_crashkernel(void)
 {
        unsigned long long free_mem;
        unsigned long long crash_size, crash_base;
+       void *vp;
        int ret;
 
        free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
@@ -155,12 +156,14 @@ static void __init reserve_crashkernel(void)
                        &crash_size, &crash_base);
        if (ret == 0 && crash_size) {
                if (crash_base <= 0) {
-                       printk(KERN_INFO "crashkernel reservation failed - "
-                                       "you have to specify a base address\n");
-                       return;
-               }
-
-               if (reserve_bootmem(crash_base, crash_size,
+                       vp = alloc_bootmem_nopanic(crash_size); 
+                       if (!vp) {
+                               printk(KERN_INFO "crashkernel allocation "
+                                      "failed\n");
+                               return;
+                       }
+                       crash_base = __pa(vp);
+               } else if (reserve_bootmem(crash_base, crash_size,
                                        BOOTMEM_EXCLUSIVE) < 0) {
                        printk(KERN_INFO "crashkernel reservation failed - "
                                        "memory is in use\n");