#include <linux/mm.h>

/* Mark pages corresponding to given address range as nosave */

static void __init

e820_mark_nosave_range(unsigned long start, unsigned long end)

{

	unsigned long pfn, max_pfn;

	if (start >= end)

		return;

	printk("Nosave address range: %016lx - %016lx\n", start, end);

	max_pfn = end >> PAGE_SHIFT;

	for (pfn = start >> PAGE_SHIFT; pfn < max_pfn; pfn++)

		if (pfn_valid(pfn))

			SetPageNosave(pfn_to_page(pfn));

}

/*

 * Find the ranges of physical addresses that do not correspond to

 * e820 RAM areas and mark the corresponding pages as nosave for software

 * suspend and suspend to RAM.

 *

 * This function requires the e820 map to be sorted and without any

 * overlapping entries and assumes the first e820 area to be RAM.

 */

void __init e820_mark_nosave_regions(void)

{

	int i;

	unsigned long paddr;

	paddr = round_down(e820.map[0].addr + e820.map[0].size, PAGE_SIZE);

	for (i = 1; i < e820.nr_map; i++) {

		struct e820entry *ei = &e820.map[i];

		if (paddr < ei->addr)

			e820_mark_nosave_range(paddr,

					round_up(ei->addr, PAGE_SIZE));

		paddr = round_down(ei->addr + ei->size, PAGE_SIZE);

		if (ei->type != E820_RAM)

			e820_mark_nosave_range(round_up(ei->addr, PAGE_SIZE),

					paddr);

		if (paddr >= (end_pfn << PAGE_SHIFT))

			break;

	}

}

	e820_mark_nosave_regions();

extern void e820_mark_nosave_regions(void);