diff options
Diffstat (limited to 'mm/memblock.c')
| -rw-r--r-- | mm/memblock.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index 88adc8afb610..b8d9147e5c08 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -828,6 +828,23 @@ phys_addr_t __init memblock_phys_mem_size(void) return memblock.memory.total_size; } +phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) +{ + unsigned long pages = 0; + struct memblock_region *r; + unsigned long start_pfn, end_pfn; + + for_each_memblock(memory, r) { + start_pfn = memblock_region_memory_base_pfn(r); + end_pfn = memblock_region_memory_end_pfn(r); + start_pfn = min_t(unsigned long, start_pfn, limit_pfn); + end_pfn = min_t(unsigned long, end_pfn, limit_pfn); + pages += end_pfn - start_pfn; + } + + return (phys_addr_t)pages << PAGE_SHIFT; +} + /* lowest address */ phys_addr_t __init_memblock memblock_start_of_DRAM(void) { |