示例#1
0
	/* Reserve the lowmem memblock reserved regions in bootmem. */
	for_each_memblock(reserved, reg) {
		unsigned long start = memblock_region_reserved_base_pfn(reg);
		unsigned long end = memblock_region_reserved_end_pfn(reg);

		if (end >= end_pfn)
			end = end_pfn;
		if (start >= end)
			break;

		reserve_bootmem(__pfn_to_phys(start),
			        (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
	}
示例#2
0
文件: init.c 项目: Holong/LinuxKernel
	/* Reserve the lowmem memblock reserved regions in bootmem. */
	for_each_memblock(reserved, reg) {
	// for (reg = memblock.reserved.regions; reg < (memblock.reserved.regions + memblock.reserved.cnt), reg++)
		unsigned long start = memblock_region_reserved_base_pfn(reg);
		unsigned long end = memblock_region_reserved_end_pfn(reg);

		if (end >= end_pfn)
			end = end_pfn;
		if (start >= end)
			break;

		// start : 0x20000000, (end - start) << PAGE_SHIFT : 0x2F800000
		reserve_bootmem(__pfn_to_phys(start),
			        (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
		// start부터 end에 해당하는 bitmap 중 reserved 영역을 1로 설정
	}
示例#3
0
	/* Reserve the lowmem memblock reserved regions in bootmem. */
	for_each_memblock(reserved, reg) {
		// start: 0x40004
		unsigned long start = memblock_region_reserved_base_pfn(reg);
		// end: 0x40008
		unsigned long end = memblock_region_reserved_end_pfn(reg);

		// end: 0x40008, end_pfn: 0x4f800
		if (end >= end_pfn)
			end = end_pfn;
		// start: 0x40004, end: 0x40008
		if (start >= end)
			break;

		// __pfn_to_phys(0x40004): 0x40004000, (end - start) << PAGE_SHIFT: 0x4000
		// BOOTMEM_DEFAULT: 0
		reserve_bootmem(__pfn_to_phys(start),
			        (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
	}
示例#4
0
文件: init.c 项目: CCNITSilchar/linux
static void __init free_highpages(void)
{
	unsigned long max_low = max_low_pfn;
	struct memblock_region *mem, *res;

	reset_all_zones_managed_pages();
	/* set highmem page free */
	for_each_memblock(memory, mem) {
		unsigned long start = memblock_region_memory_base_pfn(mem);
		unsigned long end = memblock_region_memory_end_pfn(mem);

		/* Ignore complete lowmem entries */
		if (end <= max_low)
			continue;

		if (memblock_is_nomap(mem))
			continue;

		/* Truncate partial highmem entries */
		if (start < max_low)
			start = max_low;

		/* Find and exclude any reserved regions */
		for_each_memblock(reserved, res) {
			unsigned long res_start, res_end;

			res_start = memblock_region_reserved_base_pfn(res);
			res_end = memblock_region_reserved_end_pfn(res);

			if (res_end < start)
				continue;
			if (res_start < start)
				res_start = start;
			if (res_start > end)
				res_start = end;
			if (res_end > end)
				res_end = end;
			if (res_start != start)
				free_area_high(start, res_start);
			start = res_end;
			if (start == end)
				break;
		}