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#include <linux/string.h> | #include <linux/string.h> |
#include <linux/kexec.h> | #include <linux/kexec.h> |
#include <linux/module.h> | #include <linux/module.h> |
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#include <linux/mm.h> |
#include <asm/pgtable.h> | #include <asm/pgtable.h> |
#include <asm/page.h> | #include <asm/page.h> |
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Lines 293-298
void __init e820_reserve_resources(void)
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Link Here
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} | } |
} | } |
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/* Mark pages corresponding to given address range as nosave */ |
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static void __init |
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e820_mark_nosave_range(unsigned long start, unsigned long end) |
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{ |
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unsigned long pfn, max_pfn; |
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if (start >= end) |
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return; |
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printk("Nosave address range: %016lx - %016lx\n", start, end); |
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max_pfn = end >> PAGE_SHIFT; |
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for (pfn = start >> PAGE_SHIFT; pfn < max_pfn; pfn++) |
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if (pfn_valid(pfn)) |
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SetPageNosave(pfn_to_page(pfn)); |
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} |
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/* |
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* Find the ranges of physical addresses that do not correspond to |
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* e820 RAM areas and mark the corresponding pages as nosave for software |
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* suspend and suspend to RAM. |
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* |
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* This function requires the e820 map to be sorted and without any |
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* overlapping entries and assumes the first e820 area to be RAM. |
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*/ |
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void __init e820_mark_nosave_regions(void) |
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{ |
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int i; |
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unsigned long paddr; |
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paddr = round_down(e820.map[0].addr + e820.map[0].size, PAGE_SIZE); |
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for (i = 1; i < e820.nr_map; i++) { |
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struct e820entry *ei = &e820.map[i]; |
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if (paddr < ei->addr) |
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e820_mark_nosave_range(paddr, |
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round_up(ei->addr, PAGE_SIZE)); |
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paddr = round_down(ei->addr + ei->size, PAGE_SIZE); |
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if (ei->type != E820_RAM) |
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e820_mark_nosave_range(round_up(ei->addr, PAGE_SIZE), |
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paddr); |
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if (paddr >= (end_pfn << PAGE_SHIFT)) |
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break; |
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} |
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} |
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/* | /* |
* Add a memory region to the kernel e820 map. | * Add a memory region to the kernel e820 map. |
*/ | */ |
