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x86, memblock: Add memblock_x86_to_bootmem()

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memblock_x86_to_bootmem() will reserve memblock.reserved.region in
bootmem after bootmem is set up.

We can use it to with all arches that support memblock later.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu 2010-08-25 13:39:15 -07:00 committed by H. Peter Anvin
parent f88eff74aa
commit 27de794365
2 changed files with 30 additions and 0 deletions
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1
arch/x86/include/asm/memblock.h
View File

@ -4,5 +4,6 @@
#define ARCH_DISCARD_MEMBLOCK
u64 memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align);
void memblock_x86_to_bootmem(u64 start, u64 end);
#endif

29
arch/x86/mm/memblock.c
View File

@ -85,3 +85,32 @@ u64 __init memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align)
return MEMBLOCK_ERROR;
}
#ifndef CONFIG_NO_BOOTMEM
void __init memblock_x86_to_bootmem(u64 start, u64 end)
{
int count;
u64 final_start, final_end;
struct memblock_region *r;
/* Take out region array itself */
memblock_free_reserved_regions();
count = memblock.reserved.cnt;
pr_info("(%d early reservations) ==> bootmem [%010llx-%010llx]\n", count, start, end - 1);
for_each_memblock(reserved, r) {
pr_info(" [%010llx-%010llx] ", (u64)r->base, (u64)r->base + r->size - 1);
final_start = max(start, r->base);
final_end = min(end, r->base + r->size);
if (final_start >= final_end) {
pr_cont("\n");
continue;
}
pr_cont(" ==> [%010llx-%010llx]\n", final_start, final_end - 1);
reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
}
/* Put region array back ? */
memblock_reserve_reserved_regions();
}
#endif