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x86: introduce initmem_init for 32 bit 

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-06-22 02:45:39 -07:00 committed by Ingo Molnar
parent 1f75d7e32e
commit b2ac82a090
4 changed files with 99 additions and 94 deletions
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94
arch/x86/kernel/setup_32.c
View File

@ -300,71 +300,11 @@ unsigned long __init find_max_low_pfn(void)
return max_low_pfn; return max_low_pfn;
} }
#ifndef CONFIG_NEED_MULTIPLE_NODES
static void __init setup_bootmem_allocator(void);
static unsigned long __init setup_memory(void)
{
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
min_low_pfn = PFN_UP(init_pg_tables_end);
max_low_pfn = find_max_low_pfn();
#ifdef CONFIG_HIGHMEM
highstart_pfn = highend_pfn = max_pfn;
if (max_pfn > max_low_pfn) {
highstart_pfn = max_low_pfn;
}
memory_present(0, 0, highend_pfn);
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
pages_to_mb(highend_pfn - highstart_pfn));
num_physpages = highend_pfn;
high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
#else
memory_present(0, 0, max_low_pfn);
num_physpages = max_low_pfn;
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
#endif
#ifdef CONFIG_FLATMEM
max_mapnr = num_physpages;
#endif
printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
pages_to_mb(max_low_pfn));
setup_bootmem_allocator();
return max_low_pfn;
}
static void __init zone_sizes_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] =
virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
remove_all_active_ranges();
#ifdef CONFIG_HIGHMEM
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
e820_register_active_regions(0, 0, highend_pfn);
#else
e820_register_active_regions(0, 0, max_low_pfn);
#endif
free_area_init_nodes(max_zone_pfns);
}
#else
extern unsigned long __init setup_memory(void);
extern void zone_sizes_init(void);
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
#ifdef CONFIG_BLK_DEV_INITRD #ifdef CONFIG_BLK_DEV_INITRD
static bool do_relocate_initrd = false; static bool do_relocate_initrd = false;
static void __init reserve_initrd(void) void __init reserve_initrd(void)
{ {
u64 ramdisk_image = boot_params.hdr.ramdisk_image; u64 ramdisk_image = boot_params.hdr.ramdisk_image;
u64 ramdisk_size = boot_params.hdr.ramdisk_size; u64 ramdisk_size = boot_params.hdr.ramdisk_size;
@ -480,36 +420,6 @@ static void __init relocate_initrd(void)
#endif /* CONFIG_BLK_DEV_INITRD */ #endif /* CONFIG_BLK_DEV_INITRD */
void __init setup_bootmem_allocator(void)
{
int i;
unsigned long bootmap_size, bootmap;
/*
* Initialize the boot-time allocator (with low memory only):
*/
bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
PAGE_SIZE);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
#ifdef CONFIG_BLK_DEV_INITRD
reserve_initrd();
#endif
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
printk(KERN_INFO " low ram: %08lx - %08lx\n",
min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
printk(KERN_INFO " bootmap %08lx - %08lx\n",
bootmap, bootmap + bootmap_size);
for_each_online_node(i)
free_bootmem_with_active_regions(i, max_low_pfn);
early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
}
/* /*
* The node 0 pgdat is initialized before all of these because * The node 0 pgdat is initialized before all of these because
* it's needed for bootmem. node>0 pgdats have their virtual * it's needed for bootmem. node>0 pgdats have their virtual
@ -666,7 +576,7 @@ void __init setup_arch(char **cmdline_p)
acpi_numa_init(); acpi_numa_init();
#endif #endif
max_low_pfn = setup_memory(); max_low_pfn = initmem_init(0, max_pfn);
#ifdef CONFIG_ACPI_SLEEP #ifdef CONFIG_ACPI_SLEEP
/* /*

4
arch/x86/mm/discontig_32.c
View File

@ -309,8 +309,8 @@ static void init_remap_allocator(int nid)
(ulong) node_remap_end_vaddr[nid]); (ulong) node_remap_end_vaddr[nid]);
} }
extern void setup_bootmem_allocator(void); unsigned long __init initmem_init(unsigned long start_pfn,
unsigned long __init setup_memory(void) unsigned long end_pfn)
{ {
int nid; int nid;
unsigned long system_start_pfn, system_max_low_pfn; unsigned long system_start_pfn, system_max_low_pfn;

90
arch/x86/mm/init_32.c
View File

@ -540,6 +540,96 @@ static void __init set_nx(void)
} }
#endif #endif
#ifndef CONFIG_NEED_MULTIPLE_NODES
extern unsigned long find_max_low_pfn(void);
unsigned long __init initmem_init(unsigned long start_pfn,
unsigned long end_pfn)
{
/*
* partially used pages are not usable - thus
* we are rounding upwards:
*/
min_low_pfn = PFN_UP(init_pg_tables_end);
max_low_pfn = find_max_low_pfn();
#ifdef CONFIG_HIGHMEM
highstart_pfn = highend_pfn = max_pfn;
if (max_pfn > max_low_pfn)
highstart_pfn = max_low_pfn;
memory_present(0, 0, highend_pfn);
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
pages_to_mb(highend_pfn - highstart_pfn));
num_physpages = highend_pfn;
high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
#else
memory_present(0, 0, max_low_pfn);
num_physpages = max_low_pfn;
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
#endif
#ifdef CONFIG_FLATMEM
max_mapnr = num_physpages;
#endif
printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
pages_to_mb(max_low_pfn));
setup_bootmem_allocator();
return max_low_pfn;
}
void __init zone_sizes_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] =
virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
remove_all_active_ranges();
#ifdef CONFIG_HIGHMEM
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
e820_register_active_regions(0, 0, highend_pfn);
#else
e820_register_active_regions(0, 0, max_low_pfn);
#endif
free_area_init_nodes(max_zone_pfns);
}
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
extern void reserve_initrd(void);
void __init setup_bootmem_allocator(void)
{
int i;
unsigned long bootmap_size, bootmap;
/*
* Initialize the boot-time allocator (with low memory only):
*/
bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
PAGE_SIZE);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
#ifdef CONFIG_BLK_DEV_INITRD
reserve_initrd();
#endif
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
printk(KERN_INFO " low ram: %08lx - %08lx\n",
min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
printk(KERN_INFO " bootmap %08lx - %08lx\n",
bootmap, bootmap + bootmap_size);
for_each_online_node(i)
free_bootmem_with_active_regions(i, max_low_pfn);
early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
}
/* /*
* paging_init() sets up the page tables - note that the first 8MB are * paging_init() sets up the page tables - note that the first 8MB are
* already mapped by head.S. * already mapped by head.S.

5
include/asm-x86/page_32.h
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@ -92,6 +92,11 @@ extern int sysctl_legacy_va_layout;
#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
#define MAXMEM (-__PAGE_OFFSET - __VMALLOC_RESERVE) #define MAXMEM (-__PAGE_OFFSET - __VMALLOC_RESERVE)
extern unsigned long initmem_init(unsigned long, unsigned long);
extern void zone_sizes_init(void);
extern void setup_bootmem_allocator(void);
#ifdef CONFIG_X86_USE_3DNOW #ifdef CONFIG_X86_USE_3DNOW
#include <asm/mmx.h> #include <asm/mmx.h>