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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 /arch/powerpc
parent4693c09a47203d79a9adb69acaf3b3bb3dcf9390 (diff)
[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 'arch/powerpc')
-rw-r--r--arch/powerpc/Kconfig11
-rw-r--r--arch/powerpc/kernel/setup_64.c3
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2c1186ada3a..773b880d557 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -379,6 +379,17 @@ config CELL_IIC
bool
default y
+config CRASH_DUMP
+ bool "kernel crash dumps (EXPERIMENTAL)"
+ depends on PPC_MULTIPLATFORM
+ depends on EXPERIMENTAL
+ help
+ Build a kernel suitable for use as a kdump capture kernel.
+ The kernel will be linked at a different address than normal, and
+ so can only be used for Kdump.
+
+ Don't change this unless you know what you are doing.
+
config IBMVIO
depends on PPC_PSERIES || PPC_ISERIES
bool
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 65603e9af98..6509dd7c2f8 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -512,6 +512,9 @@ void __init setup_system(void)
ppc64_caches.iline_size);
printk("htab_address = 0x%p\n", htab_address);
printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
+#if PHYSICAL_START > 0
+ printk("physical_start = 0x%x\n", PHYSICAL_START);
+#endif
printk("-----------------------------------------------------\n");
mm_init_ppc64();