diff options
Diffstat (limited to 'arch/powerpc/mm/init_32.c')
| -rw-r--r-- | arch/powerpc/mm/init_32.c | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index 6a6975dc265..742da43b4ab 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -92,12 +92,6 @@ int __allow_ioremap_reserved; unsigned long __max_low_memory = MAX_LOW_MEM; /* - * address of the limit of what is accessible with initial MMU setup - - * 256MB usually, but only 16MB on 601. - */ -phys_addr_t __initial_memory_limit_addr = (phys_addr_t)0x10000000; - -/* * Check for command-line options that affect what MMU_init will do. */ void MMU_setup(void) @@ -126,13 +120,6 @@ void __init MMU_init(void) if (ppc_md.progress) ppc_md.progress("MMU:enter", 0x111); - /* 601 can only access 16MB at the moment */ - if (PVR_VER(mfspr(SPRN_PVR)) == 1) - __initial_memory_limit_addr = 0x01000000; - /* 8xx can only access 8MB at the moment */ - if (PVR_VER(mfspr(SPRN_PVR)) == 0x50) - __initial_memory_limit_addr = 0x00800000; - /* parse args from command line */ MMU_setup(); @@ -190,20 +177,18 @@ void __init MMU_init(void) #ifdef CONFIG_BOOTX_TEXT btext_unmap(); #endif + + /* Shortly after that, the entire linear mapping will be available */ + memblock_set_current_limit(lowmem_end_addr); } /* This is only called until mem_init is done. */ void __init *early_get_page(void) { - void *p; - - if (init_bootmem_done) { - p = alloc_bootmem_pages(PAGE_SIZE); - } else { - p = __va(memblock_alloc_base(PAGE_SIZE, PAGE_SIZE, - __initial_memory_limit_addr)); - } - return p; + if (init_bootmem_done) + return alloc_bootmem_pages(PAGE_SIZE); + else + return __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE)); } /* Free up now-unused memory */ @@ -252,3 +237,17 @@ void free_initrd_mem(unsigned long start, unsigned long end) } #endif + +#ifdef CONFIG_8xx /* No 8xx specific .c file to put that in ... */ +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); + + /* 8xx can only access 8MB at the moment */ + memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000)); +} +#endif /* CONFIG_8xx */ |