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authorKumar Gala <galak@kernel.crashing.org>2008-04-16 05:52:21 +1000
committerPaul Mackerras <paulus@samba.org>2008-04-17 07:46:12 +1000
commit99c62dd773797b68f3b1ca6bb3274725d1852fa2 (patch)
tree7641433c9a3358c5dc108f2d3d4894f5f96f0b19 /arch/powerpc/mm/fsl_booke_mmu.c
parent1993cbf4ae7d30f9a417e143c1344466f2e2ae2e (diff)
downloadop-kernel-dev-99c62dd773797b68f3b1ca6bb3274725d1852fa2.zip
op-kernel-dev-99c62dd773797b68f3b1ca6bb3274725d1852fa2.tar.gz
[POWERPC] Remove and replace uses of PPC_MEMSTART with memstart_addr
A number of users of PPC_MEMSTART (40x, ppc_mmu_32) can just always use 0 as we don't support booting these kernels at non-zero physical addresses since their exception vectors must be at 0 (or 0xfffx_xxxx). For the sub-arches that support relocatable interrupt vectors (book-e), it's reasonable to have memory start at a non-zero physical address. For those cases use the variable memstart_addr instead of the #define PPC_MEMSTART since the only uses of PPC_MEMSTART are for initialization and in the future we can set memstart_addr at runtime to have a relocatable kernel. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/mm/fsl_booke_mmu.c')
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index c93a966..3dd0c818 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -53,13 +53,12 @@
#include <asm/machdep.h>
#include <asm/setup.h>
+#include "mmu_decl.h"
+
extern void loadcam_entry(unsigned int index);
unsigned int tlbcam_index;
unsigned int num_tlbcam_entries;
static unsigned long __cam0, __cam1, __cam2;
-extern unsigned long total_lowmem;
-extern unsigned long __max_low_memory;
-extern unsigned long __initial_memory_limit;
#define MAX_LOW_MEM CONFIG_LOWMEM_SIZE
#define NUM_TLBCAMS (16)
@@ -165,15 +164,15 @@ void invalidate_tlbcam_entry(int index)
void __init cam_mapin_ram(unsigned long cam0, unsigned long cam1,
unsigned long cam2)
{
- settlbcam(0, PAGE_OFFSET, PPC_MEMSTART, cam0, _PAGE_KERNEL, 0);
+ settlbcam(0, PAGE_OFFSET, memstart_addr, cam0, _PAGE_KERNEL, 0);
tlbcam_index++;
if (cam1) {
tlbcam_index++;
- settlbcam(1, PAGE_OFFSET+cam0, PPC_MEMSTART+cam0, cam1, _PAGE_KERNEL, 0);
+ settlbcam(1, PAGE_OFFSET+cam0, memstart_addr+cam0, cam1, _PAGE_KERNEL, 0);
}
if (cam2) {
tlbcam_index++;
- settlbcam(2, PAGE_OFFSET+cam0+cam1, PPC_MEMSTART+cam0+cam1, cam2, _PAGE_KERNEL, 0);
+ settlbcam(2, PAGE_OFFSET+cam0+cam1, memstart_addr+cam0+cam1, cam2, _PAGE_KERNEL, 0);
}
}
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