dect/linux-2.6
Archived
14
0
Fork 0
Code Releases Activity

x86: move e820_register_active() to e820.c

Browse source 
to prepare 32-bit to use it.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-06-03 19:34:00 -07:00 committed by Ingo Molnar
parent 84b56fa46b
commit ee0c80fadf
4 changed files with 120 additions and 102 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

109
arch/x86/kernel/e820.c
View file

@ -764,3 +764,112 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
return addr;
}
#ifdef CONFIG_X86_32
# ifdef CONFIG_X86_PAE
# define MAX_ARCH_PFN (1ULL<<(36-PAGE_SHIFT))
# else
# define MAX_ARCH_PFN (1ULL<<(32-PAGE_SHIFT))
# endif
#else /* CONFIG_X86_32 */
# define MAX_ARCH_PFN MAXMEM<<PAGE_SHIFT
#endif
/*
* Last pfn which the user wants to use.
*/
unsigned long __initdata end_user_pfn = MAX_ARCH_PFN;
/*
* Find the highest page frame number we have available
*/
unsigned long __init e820_end_of_ram(void)
{
unsigned long last_pfn;
unsigned long max_arch_pfn = MAX_ARCH_PFN;
last_pfn = find_max_pfn_with_active_regions();
if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
if (last_pfn > end_user_pfn)
last_pfn = end_user_pfn;
printk(KERN_INFO "last_pfn = %lu max_arch_pfn = %lu\n",
last_pfn, max_arch_pfn);
return last_pfn;
}
/*
* 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.
*/
int __init e820_find_active_region(const struct e820entry *ei,
unsigned long start_pfn,
unsigned long last_pfn,
unsigned long *ei_startpfn,
unsigned long *ei_endpfn)
{
u64 align = PAGE_SIZE;
*ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT;
*ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT;
/* Skip map entries smaller than a page */
if (*ei_startpfn >= *ei_endpfn)
return 0;
/* Skip if map is outside the node */
if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
*ei_startpfn >= last_pfn)
return 0;
/* Check for overlaps */
if (*ei_startpfn < start_pfn)
*ei_startpfn = start_pfn;
if (*ei_endpfn > last_pfn)
*ei_endpfn = last_pfn;
/* Obey end_user_pfn to save on memmap */
if (*ei_startpfn >= end_user_pfn)
return 0;
if (*ei_endpfn > end_user_pfn)
*ei_endpfn = end_user_pfn;
return 1;
}
/* Walk the e820 map and register active regions within a node */
void __init e820_register_active_regions(int nid, unsigned long start_pfn,
unsigned long last_pfn)
{
unsigned long ei_startpfn;
unsigned long ei_endpfn;
int i;
for (i = 0; i < e820.nr_map; i++)
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
add_active_range(nid, ei_startpfn, ei_endpfn);
}
/*
* Find the hole size (in bytes) in the memory range.
* @start: starting address of the memory range to scan
* @end: ending address of the memory range to scan
*/
u64 __init e820_hole_size(u64 start, u64 end)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long last_pfn = end >> PAGE_SHIFT;
unsigned long ei_startpfn, ei_endpfn, ram = 0;
int i;
for (i = 0; i < e820.nr_map; i++) {
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
ram += ei_endpfn - ei_startpfn;
}
return end - start - ((u64)ram << PAGE_SHIFT);
}

97
arch/x86/kernel/e820_64.c
View file

@ -41,29 +41,6 @@ unsigned long end_pfn;
*/
unsigned long max_pfn_mapped;
/*
* Last pfn which the user wants to use.
*/
static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
/*
* Find the highest page frame number we have available
*/
unsigned long __init e820_end_of_ram(void)
{
unsigned long last_pfn;
last_pfn = find_max_pfn_with_active_regions();
if (last_pfn > MAXMEM>>PAGE_SHIFT)
last_pfn = MAXMEM>>PAGE_SHIFT;
if (last_pfn > end_user_pfn)
last_pfn = end_user_pfn;
printk(KERN_INFO "last_pfn = %lu\n", last_pfn);
return last_pfn;
}
/*
* Mark e820 reserved areas as busy for the resource manager.
*/
@ -88,80 +65,6 @@ void __init e820_reserve_resources(void)
}
}
/*
* 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.
*/
static int __init e820_find_active_region(const struct e820entry *ei,
unsigned long start_pfn,
unsigned long last_pfn,
unsigned long *ei_startpfn,
unsigned long *ei_endpfn)
{
*ei_startpfn = round_up(ei->addr, PAGE_SIZE) >> PAGE_SHIFT;
*ei_endpfn = round_down(ei->addr + ei->size, PAGE_SIZE) >> PAGE_SHIFT;
/* Skip map entries smaller than a page */
if (*ei_startpfn >= *ei_endpfn)
return 0;
/* Skip if map is outside the node */
if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
*ei_startpfn >= last_pfn)
return 0;
/* Check for overlaps */
if (*ei_startpfn < start_pfn)
*ei_startpfn = start_pfn;
if (*ei_endpfn > last_pfn)
*ei_endpfn = last_pfn;
/* Obey end_user_pfn to save on memmap */
if (*ei_startpfn >= end_user_pfn)
return 0;
if (*ei_endpfn > end_user_pfn)
*ei_endpfn = end_user_pfn;
return 1;
}
/* Walk the e820 map and register active regions within a node */
void __init
e820_register_active_regions(int nid, unsigned long start_pfn,
unsigned long last_pfn)
{
unsigned long ei_startpfn;
unsigned long ei_endpfn;
int i;
for (i = 0; i < e820.nr_map; i++)
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
add_active_range(nid, ei_startpfn, ei_endpfn);
}
/*
* Find the hole size (in bytes) in the memory range.
* @start: starting address of the memory range to scan
* @end: ending address of the memory range to scan
*/
unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long last_pfn = end >> PAGE_SHIFT;
unsigned long ei_startpfn, ei_endpfn, ram = 0;
int i;
for (i = 0; i < e820.nr_map; i++) {
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
ram += ei_endpfn - ei_startpfn;
}
return end - start - (ram << PAGE_SHIFT);
}
static void early_panic(char *msg)
{
early_printk(msg);

11
include/asm-x86/e820.h
View file

@ -79,6 +79,8 @@ static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
}
#endif
extern unsigned long end_user_pfn;
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);
@ -86,6 +88,15 @@ extern void free_early(u64 start, u64 end);
extern void early_res_to_bootmem(u64 start, u64 end);
extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
extern unsigned long e820_end_of_ram(void);
extern int e820_find_active_region(const struct e820entry *ei,
unsigned long start_pfn,
unsigned long last_pfn,
unsigned long *ei_startpfn,
unsigned long *ei_endpfn);
extern void e820_register_active_regions(int nid, unsigned long start_pfn,
unsigned long end_pfn);
extern u64 e820_hole_size(u64 start, u64 end);
#endif /* __ASSEMBLY__ */
#define ISA_START_ADDRESS 0xa0000

5
include/asm-x86/e820_64.h
View file

@ -16,16 +16,11 @@
#ifndef __ASSEMBLY__
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 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);
extern int is_memory_all_valid(unsigned long start, unsigned long end);
extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
extern void e820_register_active_regions(int nid, unsigned long start_pfn,
unsigned long end_pfn);
extern void finish_e820_parsing(void);