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[PATCH] i386: Move find_max_pfn function to e820.c

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Move more code from setup.c into e820.c

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
bibo,mao 2006-12-07 02:14:06 +01:00 committed by Andi Kleen
parent 8e3342f736
commit b2dff6a88c
3 changed files with 53 additions and 55 deletions
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52
arch/i386/kernel/e820.c
View File

@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/efi.h>
#include <linux/pfn.h>
#include <asm/pgtable.h>
#include <asm/page.h>
@ -539,3 +540,54 @@ int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
return 0;
}
/*
* Callback for efi_memory_walk.
*/
static int __init
efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
{
unsigned long *max_pfn = arg, pfn;
if (start < end) {
pfn = PFN_UP(end -1);
if (pfn > *max_pfn)
*max_pfn = pfn;
}
return 0;
}
static int __init
efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
{
memory_present(0, PFN_UP(start), PFN_DOWN(end));
return 0;
}
/*
* Find the highest page frame number we have available
*/
void __init find_max_pfn(void)
{
int i;
max_pfn = 0;
if (efi_enabled) {
efi_memmap_walk(efi_find_max_pfn, &max_pfn);
efi_memmap_walk(efi_memory_present_wrapper, NULL);
return;
}
for (i = 0; i < e820.nr_map; i++) {
unsigned long start, end;
/* RAM? */
if (e820.map[i].type != E820_RAM)
continue;
start = PFN_UP(e820.map[i].addr);
end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
if (start >= end)
continue;
if (end > max_pfn)
max_pfn = end;
memory_present(0, start, end);
}
}

55
arch/i386/kernel/setup.c
View File

@ -63,9 +63,6 @@
#include <setup_arch.h>
#include <bios_ebda.h>
/* Forward Declaration. */
void __init find_max_pfn(void);
/* This value is set up by the early boot code to point to the value
immediately after the boot time page tables. It contains a *physical*
address, and must not be in the .bss segment! */
@ -387,29 +384,6 @@ static int __init parse_reservetop(char *arg)
}
early_param("reservetop", parse_reservetop);
/*
* Callback for efi_memory_walk.
*/
static int __init
efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
{
unsigned long *max_pfn = arg, pfn;
if (start < end) {
pfn = PFN_UP(end -1);
if (pfn > *max_pfn)
*max_pfn = pfn;
}
return 0;
}
static int __init
efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
{
memory_present(0, PFN_UP(start), PFN_DOWN(end));
return 0;
}
/*
* This function checks if the entire range <start,end> is mapped with type.
*
@ -442,35 +416,6 @@ e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
return 0;
}
/*
* Find the highest page frame number we have available
*/
void __init find_max_pfn(void)
{
int i;
max_pfn = 0;
if (efi_enabled) {
efi_memmap_walk(efi_find_max_pfn, &max_pfn);
efi_memmap_walk(efi_memory_present_wrapper, NULL);
return;
}
for (i = 0; i < e820.nr_map; i++) {
unsigned long start, end;
/* RAM? */
if (e820.map[i].type != E820_RAM)
continue;
start = PFN_UP(e820.map[i].addr);
end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
if (start >= end)
continue;
if (end > max_pfn)
max_pfn = end;
memory_present(0, start, end);
}
}
/*
* Determine low and high memory ranges:
*/

1
include/asm-i386/e820.h
View File

@ -38,6 +38,7 @@ extern struct e820map e820;
extern int e820_all_mapped(unsigned long start, unsigned long end,
unsigned type);
extern void find_max_pfn(void);
#endif/*!__ASSEMBLY__*/