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authorMichael Ellerman <michael@ellerman.id.au>2006-02-21 17:22:55 +1100
committerPaul Mackerras <paulus@samba.org>2006-02-24 11:36:18 +1100
commit337a7128dbe68ebe7627b6f954cb32d30d7b11c6 (patch)
tree6189f61386f3be72cffab14ed1b42a508ef1793c /arch/powerpc/kernel
parentbd6ef57e08d6cce32e93f9fc7b93d361b6a7884f (diff)
[PATCH] powerpc: Only calculate htab_size in one place for kexec
For kexec we need to know the size of the MMU hash table. Currently we calculate the size once in the htab code, and then twice more in the kexec code, once using htab_hash_mask and once using ppc64_pft_size. On some machines the ppc64_pft_size calculation is broken because ppc64_pft_size is not set. So we need to fix the second calculation, but better still we should just calculate the size once and use it everywhere else. Tested on Power5 LPAR, Power4 non-LPAR and Power3. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/machine_kexec_64.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index d6431440c54..ee166c58664 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -26,8 +26,6 @@
#include <asm/prom.h>
#include <asm/smp.h>
-#define HASH_GROUP_SIZE 0x80 /* size of each hash group, asm/mmu.h */
-
int default_machine_kexec_prepare(struct kimage *image)
{
int i;
@@ -61,7 +59,7 @@ int default_machine_kexec_prepare(struct kimage *image)
*/
if (htab_address) {
low = __pa(htab_address);
- high = low + (htab_hash_mask + 1) * HASH_GROUP_SIZE;
+ high = low + htab_size_bytes;
for (i = 0; i < image->nr_segments; i++) {
begin = image->segment[i].mem;
@@ -294,7 +292,7 @@ void default_machine_kexec(struct kimage *image)
}
/* Values we need to export to the second kernel via the device tree. */
-static unsigned long htab_base, htab_size, kernel_end;
+static unsigned long htab_base, kernel_end;
static struct property htab_base_prop = {
.name = "linux,htab-base",
@@ -305,7 +303,7 @@ static struct property htab_base_prop = {
static struct property htab_size_prop = {
.name = "linux,htab-size",
.length = sizeof(unsigned long),
- .value = (unsigned char *)&htab_size,
+ .value = (unsigned char *)&htab_size_bytes,
};
static struct property kernel_end_prop = {
@@ -331,8 +329,6 @@ static void __init export_htab_values(void)
htab_base = __pa(htab_address);
prom_add_property(node, &htab_base_prop);
-
- htab_size = 1UL << ppc64_pft_size;
prom_add_property(node, &htab_size_prop);
out: