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| author |   Kumar Gala <galak@kernel.crashing.org> | 2008-04-16 05:52:21 +1000 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2008-04-17 07:46:12 +1000 |
| commit | 99c62dd773797b68f3b1ca6bb3274725d1852fa2 (patch) | |
| tree | 7641433c9a3358c5dc108f2d3d4894f5f96f0b19 /arch/powerpc/mm/mmu_decl.h | |
| parent | [POWERPC] Provide access to arch/powerpc include path on ppc64 (diff) | |
| download | linux-dev-99c62dd773797b68f3b1ca6bb3274725d1852fa2.tar.xz linux-dev-99c62dd773797b68f3b1ca6bb3274725d1852fa2.zip | |
[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.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index ebfd13dc9d19..5bc11f5933a9 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 |