diff options
Diffstat (limited to 'arch/powerpc/mm/40x_mmu.c')
| -rw-r--r-- | arch/powerpc/mm/40x_mmu.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c index 1dc2fa5ce1bd..5810967511d4 100644 --- a/arch/powerpc/mm/40x_mmu.c +++ b/arch/powerpc/mm/40x_mmu.c @@ -35,6 +35,7 @@ #include <linux/init.h> #include <linux/delay.h> #include <linux/highmem.h> +#include <linux/memblock.h> #include <asm/pgalloc.h> #include <asm/prom.h> @@ -47,6 +48,7 @@ #include <asm/bootx.h> #include <asm/machdep.h> #include <asm/setup.h> + #include "mmu_decl.h" extern int __map_without_ltlbs; @@ -139,8 +141,19 @@ unsigned long __init mmu_mapin_ram(unsigned long top) * coverage with normal-sized pages (or other reasons) do not * attempt to allocate outside the allowed range. */ - - __initial_memory_limit_addr = memstart_addr + mapped; + memblock_set_current_limit(mapped); return mapped; } + +void setup_initial_memory_limit(phys_addr_t first_memblock_base, + phys_addr_t first_memblock_size) +{ + /* We don't currently support the first MEMBLOCK not mapping 0 + * physical on those processors + */ + BUG_ON(first_memblock_base != 0); + + /* 40x can only access 16MB at the moment (see head_40x.S) */ + memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000)); +} |