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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/mmu_decl.h
parent1993cbf4ae7d30f9a417e143c1344466f2e2ae2e (diff)
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[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/mmu_decl.h')
-rw-r--r--arch/powerpc/mm/mmu_decl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index ebfd13d..5bc11f5 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -51,6 +51,7 @@ extern unsigned long __max_low_memory;
extern unsigned long __initial_memory_limit;
extern unsigned long total_memory;
extern unsigned long total_lowmem;
+extern phys_addr_t memstart_addr;
/* ...and now those things that may be slightly different between processor
* architectures. -- Dan
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