From 4aeaa223433355a281559033f1e7600bfd73238e Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@igel.co.jp>
Date: Thu, 9 Oct 2008 18:42:55 +0900
Subject: 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
--- 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");
-- 
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