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authorMichael Ellerman <michael@ellerman.id.au>2005-12-04 18:39:23 +1100
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:52:14 +1100
commit398ab1fcb960ea0800f40a9c36355855e3e23389 (patch)
treeeb7eda3afffb3c99fc57b1064c7501e0ee2cf931 /include/asm-powerpc/page.h
parent4693c09a47203d79a9adb69acaf3b3bb3dcf9390 (diff)
downloadop-kernel-dev-398ab1fcb960ea0800f40a9c36355855e3e23389.zip
op-kernel-dev-398ab1fcb960ea0800f40a9c36355855e3e23389.tar.gz
[PATCH] powerpc: Add CONFIG_CRASH_DUMP
This patch adds a Kconfig variable, CONFIG_CRASH_DUMP, which configures the built kernel for use as a Kdump kernel. Currently "all" this involves is changing the value of KERNELBASE to 32 MB. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/page.h')
-rw-r--r--include/asm-powerpc/page.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/asm-powerpc/page.h b/include/asm-powerpc/page.h
index 4696bdb..76d7cb4 100644
--- a/include/asm-powerpc/page.h
+++ b/include/asm-powerpc/page.h
@@ -51,8 +51,16 @@
*
* If you want to test if something's a kernel address, use is_kernel_addr().
*/
+
+#ifdef CONFIG_CRASH_DUMP
+/* Kdump kernel runs at 32 MB, change at your peril. */
+#define PHYSICAL_START 0x2000000
+#else
+#define PHYSICAL_START 0x0
+#endif
+
#define PAGE_OFFSET ASM_CONST(CONFIG_KERNEL_START)
-#define KERNELBASE PAGE_OFFSET
+#define KERNELBASE (PAGE_OFFSET + PHYSICAL_START)
#ifdef CONFIG_DISCONTIGMEM
#define page_to_pfn(page) discontigmem_page_to_pfn(page)
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