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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/init_32.c | |
| 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/init_32.c')
| -rw-r--r-- | arch/powerpc/mm/init_32.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index 0c66a9fe63f5..1d7e5b8ade6a 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -59,8 +59,8 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); unsigned long total_memory; unsigned long total_lowmem; -unsigned long ppc_memstart; -unsigned long ppc_memoffset = PAGE_OFFSET; +phys_addr_t memstart_addr; +phys_addr_t lowmem_end_addr; int boot_mapsize; #ifdef CONFIG_PPC_PMAC @@ -145,8 +145,7 @@ void __init MMU_init(void) printk(KERN_WARNING "Only using first contiguous memory region"); } - total_memory = lmb_end_of_DRAM(); - total_lowmem = total_memory; + total_lowmem = total_memory = lmb_end_of_DRAM() - memstart_addr; #ifdef CONFIG_FSL_BOOKE /* Freescale Book-E parts expect lowmem to be mapped by fixed TLB |