summaryrefslogtreecommitdiff
path: root/arch/powerpc/mm/init_32.c
diff options
context:
space:
mode:
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/init_32.c
parent1993cbf4ae7d30f9a417e143c1344466f2e2ae2e (diff)
[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.c7
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