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x86: move e820_mark_nosave_regions to e820.c

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and make e820_mark_nosave_regions to take limit_pfn to use max_low_pfn
for 32bit and end_pfn for 64bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Yinghai Lu 2008-05-20 20:10:58 -07:00 committed by Thomas Gleixner
parent aafbdf71f1
commit bf62f3981c
8 changed files with 43 additions and 75 deletions
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32
arch/x86/kernel/e820.c
View File

@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/pfn.h>
#include <linux/suspend.h>
#include <asm/pgtable.h>
#include <asm/page.h>
@ -495,6 +496,37 @@ __init void e820_setup_gap(void)
pci_mem_start, gapstart, gapsize);
}
#if defined(CONFIG_X86_64) || \
(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
/**
* Find the ranges of physical addresses that do not correspond to
* e820 RAM areas and mark the corresponding pages as nosave for
* hibernation (32 bit) or software suspend and suspend to RAM (64 bit).
*
* 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(unsigned long limit_pfn)
{
int i;
unsigned long pfn;
pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
for (i = 1; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
if (pfn < PFN_UP(ei->addr))
register_nosave_region(pfn, PFN_UP(ei->addr));
pfn = PFN_DOWN(ei->addr + ei->size);
if (ei->type != E820_RAM)
register_nosave_region(PFN_UP(ei->addr), pfn);
if (pfn >= limit_pfn)
break;
}
}
#endif
/*
* Early reserved memory areas.

32
arch/x86/kernel/e820_32.c
View File

@ -9,7 +9,6 @@
#include <linux/mm.h>
#include <linux/pfn.h>
#include <linux/uaccess.h>
#include <linux/suspend.h>
#include <asm/pgtable.h>
#include <asm/page.h>
@ -208,37 +207,6 @@ void __init init_iomem_resources(struct resource *code_resource,
}
}
#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
/**
* e820_mark_nosave_regions - Find the ranges of physical addresses that do not
* correspond to e820 RAM areas and mark the corresponding pages as nosave for
* hibernation.
*
* 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 pfn;
pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
for (i = 1; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
if (pfn < PFN_UP(ei->addr))
register_nosave_region(pfn, PFN_UP(ei->addr));
pfn = PFN_DOWN(ei->addr + ei->size);
if (ei->type != E820_RAM)
register_nosave_region(PFN_UP(ei->addr), pfn);
if (pfn >= max_low_pfn)
break;
}
}
#endif
/*
* Find the highest page frame number we have available
*/

32
arch/x86/kernel/e820_64.c
View File

@ -17,7 +17,6 @@
#include <linux/kexec.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/suspend.h>
#include <linux/pfn.h>
#include <linux/pci.h>
@ -93,37 +92,6 @@ void __init e820_reserve_resources(void)
}
}
/*
* 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)
register_nosave_region(PFN_DOWN(paddr),
PFN_UP(ei->addr));
paddr = round_down(ei->addr + ei->size, PAGE_SIZE);
if (ei->type != E820_RAM)
register_nosave_region(PFN_UP(ei->addr),
PFN_DOWN(paddr));
if (paddr >= (end_pfn << PAGE_SHIFT))
break;
}
}
/*
* Finds an active region in the address range from start_pfn to last_pfn and
* returns its range in ei_startpfn and ei_endpfn for the e820 entry.

2
arch/x86/kernel/setup_32.c
View File

@ -820,7 +820,7 @@ void __init setup_arch(char **cmdline_p)
#endif
e820_setup_gap();
e820_mark_nosave_regions();
e820_mark_nosave_regions(max_low_pfn);
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)

2
arch/x86/kernel/setup_64.c
View File

@ -516,7 +516,7 @@ void __init setup_arch(char **cmdline_p)
* We trust e820 completely. No explicit ROM probing in memory.
*/
e820_reserve_resources();
e820_mark_nosave_regions();
e820_mark_nosave_regions(end_pfn);
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)

9
include/asm-x86/e820.h
View File

@ -70,6 +70,15 @@ extern u64 update_memory_range(u64 start, u64 size, unsigned old_type,
extern void update_e820(void);
extern void e820_setup_gap(void);
#if defined(CONFIG_X86_64) || \
(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
extern void e820_mark_nosave_regions(unsigned long limit_pfn);
#else
static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
{
}
#endif
extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
extern void reserve_early(u64 start, u64 end, char *name);

8
include/asm-x86/e820_32.h
View File

@ -28,13 +28,5 @@ extern void init_iomem_resources(struct resource *code_resource,
struct resource *data_resource,
struct resource *bss_resource);
#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
extern void e820_mark_nosave_regions(void);
#else
static inline void e820_mark_nosave_regions(void)
{
}
#endif
#endif/*!__ASSEMBLY__*/
#endif/*__E820_HEADER*/

1
include/asm-x86/e820_64.h
View File

@ -18,7 +18,6 @@ extern void setup_memory_region(void);
extern void contig_e820_setup(void);
extern unsigned long e820_end_of_ram(void);
extern void e820_reserve_resources(void);
extern void e820_mark_nosave_regions(void);
extern int e820_any_non_reserved(unsigned long start, unsigned long end);
extern int is_memory_any_valid(unsigned long start, unsigned long end);
extern int e820_all_non_reserved(unsigned long start, unsigned long end);