diff options
Diffstat (limited to 'arch/xtensa/mm/init.c')
| -rw-r--r-- | arch/xtensa/mm/init.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index 77ed202..5a084fa 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; |