diff options
Diffstat (limited to 'mm/memblock.c')
| -rw-r--r-- | mm/memblock.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index 1b444c730846..114df622853f 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -820,6 +820,38 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) /** + * __next_reserved_mem_region - next function for for_each_reserved_region() + * @idx: pointer to u64 loop variable + * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL + * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL + * + * Iterate over all reserved memory regions. + */ +void __init_memblock __next_reserved_mem_region(u64 *idx, + phys_addr_t *out_start, + phys_addr_t *out_end) +{ + struct memblock_type *rsv = &memblock.reserved; + + if (*idx >= 0 && *idx < rsv->cnt) { + struct memblock_region *r = &rsv->regions[*idx]; + phys_addr_t base = r->base; + phys_addr_t size = r->size; + + if (out_start) + *out_start = base; + if (out_end) + *out_end = base + size - 1; + + *idx += 1; + return; + } + + /* signal end of iteration */ + *idx = ULLONG_MAX; +} + +/** * __next__mem_range - next function for for_each_free_mem_range() etc. * @idx: pointer to u64 loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes |