diff options
Diffstat (limited to 'arch/xtensa/mm/init.c')
| -rw-r--r-- | arch/xtensa/mm/init.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index 77ed20209ca5..9a9a5935bd36 100644 --- a/arch/xtensa/mm/init.c +++ b/arch/xtensa/mm/init.c @@ -239,6 +239,17 @@ void __init bootmem_init(void) unsigned long bootmap_start, bootmap_size; int i; + /* Reserve all memory below PLATFORM_DEFAULT_MEM_START, as memory + * accounting doesn't work for pages below that address. + * + * If PLATFORM_DEFAULT_MEM_START is zero reserve page at address 0: + * successfull allocations should never return NULL. + */ + if (PLATFORM_DEFAULT_MEM_START) + mem_reserve(0, PLATFORM_DEFAULT_MEM_START, 0); + else + mem_reserve(0, 1, 0); + sysmem_dump(); max_low_pfn = max_pfn = 0; min_low_pfn = ~0; @@ -332,18 +343,24 @@ void __init mem_init(void) " pkmap : 0x%08lx - 0x%08lx (%5lu kB)\n" " fixmap : 0x%08lx - 0x%08lx (%5lu kB)\n" #endif +#ifdef CONFIG_MMU " vmalloc : 0x%08x - 0x%08x (%5u MB)\n" - " lowmem : 0x%08x - 0x%08lx (%5lu MB)\n", +#endif + " lowmem : 0x%08lx - 0x%08lx (%5lu MB)\n", #ifdef CONFIG_HIGHMEM PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE, (LAST_PKMAP*PAGE_SIZE) >> 10, FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10, #endif +#ifdef CONFIG_MMU VMALLOC_START, VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20, PAGE_OFFSET, PAGE_OFFSET + (max_low_pfn - min_low_pfn) * PAGE_SIZE, +#else + min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE, +#endif ((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20); } |