diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-12-13 12:12:51 +0300 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-12-13 12:12:51 +0300 |
commit | 72aaf09fda49f5919d98d65d35e5179f3acb0497 (patch) | |
tree | 5fd25748f7f5640f8ee8efb86ddca88d12840791 /arch/powerpc/mm/40x_mmu.c | |
parent | 67fbc2312312095acc2f19a0b601bac10f84cf9d (diff) | |
parent | 58c2467355ed3154a12ee49d8f8236547145c9d3 (diff) | |
download | linux-72aaf09fda49f5919d98d65d35e5179f3acb0497.tar.xz |
Merge git://git.marvell.com/orion into devel
Diffstat (limited to 'arch/powerpc/mm/40x_mmu.c')
-rw-r--r-- | arch/powerpc/mm/40x_mmu.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c index cecbbc76f624..29954dc28942 100644 --- a/arch/powerpc/mm/40x_mmu.c +++ b/arch/powerpc/mm/40x_mmu.c @@ -93,7 +93,7 @@ void __init MMU_init_hw(void) unsigned long __init mmu_mapin_ram(void) { - unsigned long v, s; + unsigned long v, s, mapped; phys_addr_t p; v = KERNELBASE; @@ -130,5 +130,17 @@ unsigned long __init mmu_mapin_ram(void) s -= LARGE_PAGE_SIZE_4M; } - return total_lowmem - s; + mapped = total_lowmem - s; + + /* If the size of RAM is not an exact power of two, we may not + * have covered RAM in its entirety with 16 and 4 MiB + * pages. Consequently, restrict the top end of RAM currently + * allocable so that calls to the LMB to allocate PTEs for "tail" + * coverage with normal-sized pages (or other reasons) do not + * attempt to allocate outside the allowed range. + */ + + __initial_memory_limit_addr = memstart_addr + mapped; + + return mapped; } |