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Merge branch 'x86/mm' into x86/core

hifive-unleashed-5.1
Ingo Molnar 2009-03-05 21:49:35 +01:00
parent caab36b593 ed26dbe5ae
commit 28e93a005b
13 changed files with 472 additions and 491 deletions
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18
arch/x86/include/asm/init.h 100644
View File

@ -0,0 +1,18 @@
#ifndef _ASM_X86_INIT_32_H
#define _ASM_X86_INIT_32_H
#ifdef CONFIG_X86_32
extern void __init early_ioremap_page_table_range_init(void);
#endif
extern unsigned long __init
kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask);
extern unsigned long __initdata e820_table_start;
extern unsigned long __meminitdata e820_table_end;
extern unsigned long __meminitdata e820_table_top;
#endif /* _ASM_X86_INIT_32_H */

6
arch/x86/include/asm/page_types.h
View File

@ -40,14 +40,8 @@
#ifndef __ASSEMBLY__
struct pgprot;
extern int page_is_ram(unsigned long pagenr);
extern int devmem_is_allowed(unsigned long pagenr);
extern void map_devmem(unsigned long pfn, unsigned long size,
struct pgprot vma_prot);
extern void unmap_devmem(unsigned long pfn, unsigned long size,
struct pgprot vma_prot);
extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;

5
arch/x86/include/asm/pat.h
View File

@ -2,6 +2,7 @@
#define _ASM_X86_PAT_H
#include <linux/types.h>
#include <asm/pgtable_types.h>
#ifdef CONFIG_X86_PAT
extern int pat_enabled;
@ -17,5 +18,9 @@ extern int free_memtype(u64 start, u64 end);
extern int kernel_map_sync_memtype(u64 base, unsigned long size,
unsigned long flag);
extern void map_devmem(unsigned long pfn, unsigned long size,
struct pgprot vma_prot);
extern void unmap_devmem(unsigned long pfn, unsigned long size,
struct pgprot vma_prot);
#endif /* _ASM_X86_PAT_H */

5
arch/x86/include/asm/pgtable_32_types.h
View File

@ -25,6 +25,11 @@
* area for the same reason. ;)
*/
#define VMALLOC_OFFSET (8 * 1024 * 1024)
#ifndef __ASSEMBLER__
extern bool __vmalloc_start_set; /* set once high_memory is set */
#endif
#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
#ifdef CONFIG_X86_PAE
#define LAST_PKMAP 512

1
arch/x86/include/asm/pgtable_types.h
View File

@ -273,6 +273,7 @@ typedef struct page *pgtable_t;
extern pteval_t __supported_pte_mask;
extern int nx_enabled;
extern void set_nx(void);
#define pgprot_writecombine pgprot_writecombine
extern pgprot_t pgprot_writecombine(pgprot_t prot);

25
arch/x86/kernel/mpparse.c
View File

@ -558,6 +558,19 @@ static inline void __init construct_default_ISA_mptable(int mpc_default_type)
static struct mpf_intel *mpf_found;
static unsigned long __init get_mpc_size(unsigned long physptr)
{
struct mpc_table *mpc;
unsigned long size;
mpc = early_ioremap(physptr, PAGE_SIZE);
size = mpc->length;
early_iounmap(mpc, PAGE_SIZE);
apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
return size;
}
/*
* Scan the memory blocks for an SMP configuration block.
*/
@ -611,12 +624,16 @@ static void __init __get_smp_config(unsigned int early)
construct_default_ISA_mptable(mpf->feature1);
} else if (mpf->physptr) {
struct mpc_table *mpc;
unsigned long size;
size = get_mpc_size(mpf->physptr);
mpc = early_ioremap(mpf->physptr, size);
/*
* Read the physical hardware table. Anything here will
* override the defaults.
*/
if (!smp_read_mpc(phys_to_virt(mpf->physptr), early)) {
if (!smp_read_mpc(mpc, early)) {
#ifdef CONFIG_X86_LOCAL_APIC
smp_found_config = 0;
#endif
@ -624,8 +641,10 @@ static void __init __get_smp_config(unsigned int early)
"BIOS bug, MP table errors detected!...\n");
printk(KERN_ERR "... disabling SMP support. "
"(tell your hw vendor)\n");
early_iounmap(mpc, size);
return;
}
early_iounmap(mpc, size);
if (early)
return;
@ -697,10 +716,10 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
if (!reserve)
return 1;
reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
reserve_bootmem_generic(virt_to_phys(mpf), sizeof(*mpf),
BOOTMEM_DEFAULT);
if (mpf->physptr) {
unsigned long size = PAGE_SIZE;
unsigned long size = get_mpc_size(mpf->physptr);
#ifdef CONFIG_X86_32
/*
* We cannot access to MPC table to compute

4
arch/x86/kernel/setup.c
View File

@ -202,7 +202,9 @@ struct ist_info ist_info;
#endif
#else
struct cpuinfo_x86 boot_cpu_data __read_mostly;
struct cpuinfo_x86 boot_cpu_data __read_mostly = {
.x86_phys_bits = MAX_PHYSMEM_BITS,
};
EXPORT_SYMBOL(boot_cpu_data);
#endif

9
arch/x86/mm/highmem_32.c
View File

@ -158,7 +158,6 @@ EXPORT_SYMBOL(kunmap);
EXPORT_SYMBOL(kmap_atomic);
EXPORT_SYMBOL(kunmap_atomic);
#ifdef CONFIG_NUMA
void __init set_highmem_pages_init(void)
{
struct zone *zone;
@ -182,11 +181,3 @@ void __init set_highmem_pages_init(void)
}
totalram_pages += totalhigh_pages;
}
#else
void __init set_highmem_pages_init(void)
{
add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
totalram_pages += totalhigh_pages;
}
#endif /* CONFIG_NUMA */

344
arch/x86/mm/init.c
View File

@ -1,8 +1,345 @@
#include <linux/ioport.h>
#include <linux/swap.h>
#include <asm/cacheflush.h>
#include <asm/e820.h>
#include <asm/init.h>
#include <asm/page.h>
#include <asm/page_types.h>
#include <asm/sections.h>
#include <asm/system.h>
#include <asm/tlbflush.h>
unsigned long __initdata e820_table_start;
unsigned long __meminitdata e820_table_end;
unsigned long __meminitdata e820_table_top;
int after_bootmem;
int direct_gbpages
#ifdef CONFIG_DIRECT_GBPAGES
= 1
#endif
;
static void __init find_early_table_space(unsigned long end, int use_pse,
int use_gbpages)
{
unsigned long puds, pmds, ptes, tables, start;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
if (use_gbpages) {
unsigned long extra;
extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
} else
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
if (use_pse) {
unsigned long extra;
extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
#ifdef CONFIG_X86_32
extra += PMD_SIZE;
#endif
ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else
ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
#ifdef CONFIG_X86_32
/* for fixmap */
tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
#endif
/*
* RED-PEN putting page tables only on node 0 could
* cause a hotspot and fill up ZONE_DMA. The page tables
* need roughly 0.5KB per GB.
*/
#ifdef CONFIG_X86_32
start = 0x7000;
e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
tables, PAGE_SIZE);
#else /* CONFIG_X86_64 */
start = 0x8000;
e820_table_start = find_e820_area(start, end, tables, PAGE_SIZE);
#endif
if (e820_table_start == -1UL)
panic("Cannot find space for the kernel page tables");
e820_table_start >>= PAGE_SHIFT;
e820_table_end = e820_table_start;
e820_table_top = e820_table_start + (tables >> PAGE_SHIFT);
printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, e820_table_start << PAGE_SHIFT, e820_table_top << PAGE_SHIFT);
}
struct map_range {
unsigned long start;
unsigned long end;
unsigned page_size_mask;
};
#ifdef CONFIG_X86_32
#define NR_RANGE_MR 3
#else /* CONFIG_X86_64 */
#define NR_RANGE_MR 5
#endif
static int save_mr(struct map_range *mr, int nr_range,
unsigned long start_pfn, unsigned long end_pfn,
unsigned long page_size_mask)
{
if (start_pfn < end_pfn) {
if (nr_range >= NR_RANGE_MR)
panic("run out of range for init_memory_mapping\n");
mr[nr_range].start = start_pfn<<PAGE_SHIFT;
mr[nr_range].end = end_pfn<<PAGE_SHIFT;
mr[nr_range].page_size_mask = page_size_mask;
nr_range++;
}
return nr_range;
}
#ifdef CONFIG_X86_64
static void __init init_gbpages(void)
{
if (direct_gbpages && cpu_has_gbpages)
printk(KERN_INFO "Using GB pages for direct mapping\n");
else
direct_gbpages = 0;
}
#else
static inline void init_gbpages(void)
{
}
#endif
/*
* Setup the direct mapping of the physical memory at PAGE_OFFSET.
* This runs before bootmem is initialized and gets pages directly from
* the physical memory. To access them they are temporarily mapped.
*/
unsigned long __init_refok init_memory_mapping(unsigned long start,
unsigned long end)
{
unsigned long page_size_mask = 0;
unsigned long start_pfn, end_pfn;
unsigned long pos;
unsigned long ret;
struct map_range mr[NR_RANGE_MR];
int nr_range, i;
int use_pse, use_gbpages;
printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
if (!after_bootmem)
init_gbpages();
#ifdef CONFIG_DEBUG_PAGEALLOC
/*
* For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
* This will simplify cpa(), which otherwise needs to support splitting
* large pages into small in interrupt context, etc.
*/
use_pse = use_gbpages = 0;
#else
use_pse = cpu_has_pse;
use_gbpages = direct_gbpages;
#endif
#ifdef CONFIG_X86_32
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk(KERN_INFO "NX (Execute Disable) protection: active\n");
#endif
/* Enable PSE if available */
if (cpu_has_pse)
set_in_cr4(X86_CR4_PSE);
/* Enable PGE if available */
if (cpu_has_pge) {
set_in_cr4(X86_CR4_PGE);
__supported_pte_mask |= _PAGE_GLOBAL;
}
#endif
if (use_gbpages)
page_size_mask |= 1 << PG_LEVEL_1G;
if (use_pse)
page_size_mask |= 1 << PG_LEVEL_2M;
memset(mr, 0, sizeof(mr));
nr_range = 0;
/* head if not big page alignment ? */
start_pfn = start >> PAGE_SHIFT;
pos = start_pfn << PAGE_SHIFT;
#ifdef CONFIG_X86_32
/*
* Don't use a large page for the first 2/4MB of memory
* because there are often fixed size MTRRs in there
* and overlapping MTRRs into large pages can cause
* slowdowns.
*/
if (pos == 0)
end_pfn = 1<<(PMD_SHIFT - PAGE_SHIFT);
else
end_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
#else /* CONFIG_X86_64 */
end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
#endif
if (end_pfn > (end >> PAGE_SHIFT))
end_pfn = end >> PAGE_SHIFT;
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
pos = end_pfn << PAGE_SHIFT;
}
/* big page (2M) range */
start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
#ifdef CONFIG_X86_32
end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
#else /* CONFIG_X86_64 */
end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
<< (PUD_SHIFT - PAGE_SHIFT);
if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
#endif
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
pos = end_pfn << PAGE_SHIFT;
}
#ifdef CONFIG_X86_64
/* big page (1G) range */
start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
<< (PUD_SHIFT - PAGE_SHIFT);
end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask &
((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
pos = end_pfn << PAGE_SHIFT;
}
/* tail is not big page (1G) alignment */
start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
pos = end_pfn << PAGE_SHIFT;
}
#endif
/* tail is not big page (2M) alignment */
start_pfn = pos>>PAGE_SHIFT;
end_pfn = end>>PAGE_SHIFT;
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
/* try to merge same page size and continuous */
for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
unsigned long old_start;
if (mr[i].end != mr[i+1].start ||
mr[i].page_size_mask != mr[i+1].page_size_mask)
continue;
/* move it */
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
(nr_range - 1 - i) * sizeof(struct map_range));
mr[i--].start = old_start;
nr_range--;
}
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG " %010lx - %010lx page %s\n",
mr[i].start, mr[i].end,
(mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
(mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
/*
* Find space for the kernel direct mapping tables.
*
* Later we should allocate these tables in the local node of the
* memory mapped. Unfortunately this is done currently before the
* nodes are discovered.
*/
if (!after_bootmem)
find_early_table_space(end, use_pse, use_gbpages);
#ifdef CONFIG_X86_32
for (i = 0; i < nr_range; i++)
kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask);
ret = end;
#else /* CONFIG_X86_64 */
for (i = 0; i < nr_range; i++)
ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask);
#endif
#ifdef CONFIG_X86_32
early_ioremap_page_table_range_init();
load_cr3(swapper_pg_dir);
#endif
#ifdef CONFIG_X86_64
if (!after_bootmem)
mmu_cr4_features = read_cr4();
#endif
__flush_tlb_all();
if (!after_bootmem && e820_table_end > e820_table_start)
reserve_early(e820_table_start << PAGE_SHIFT,
e820_table_end << PAGE_SHIFT, "PGTABLE");
if (!after_bootmem)
early_memtest(start, end);
return ret >> PAGE_SHIFT;
}
/*
* devmem_is_allowed() checks to see if /dev/mem access to a certain address
* is valid. The argument is a physical page number.
*
*
* On x86, access has to be given to the first megabyte of ram because that area
* contains bios code and data regions used by X and dosemu and similar apps.
* Access has to be given to non-kernel-ram areas as well, these contain the PCI
* mmio resources as well as potential bios/acpi data regions.
*/
int devmem_is_allowed(unsigned long pagenr)
{
if (pagenr <= 256)
return 1;
if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
return 0;
if (!page_is_ram(pagenr))
return 1;
return 0;
}
void free_init_pages(char *what, unsigned long begin, unsigned long end)
{
@ -47,3 +384,10 @@ void free_initmem(void)
(unsigned long)(&__init_begin),
(unsigned long)(&__init_end));
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_init_pages("initrd memory", start, end);
}
#endif

255
arch/x86/mm/init_32.c
View File

@ -49,6 +49,7 @@
#include <asm/paravirt.h>
#include <asm/setup.h>
#include <asm/cacheflush.h>
#include <asm/init.h>
unsigned long max_low_pfn_mapped;
unsigned long max_pfn_mapped;
@ -58,19 +59,14 @@ unsigned long highstart_pfn, highend_pfn;
static noinline int do_test_wp_bit(void);
static unsigned long __initdata table_start;
static unsigned long __meminitdata table_end;
static unsigned long __meminitdata table_top;
static int __initdata after_init_bootmem;
bool __read_mostly __vmalloc_start_set = false;
static __init void *alloc_low_page(void)
{
unsigned long pfn = table_end++;
unsigned long pfn = e820_table_end++;
void *adr;
if (pfn >= table_top)
if (pfn >= e820_table_top)
panic("alloc_low_page: ran out of memory");
adr = __va(pfn * PAGE_SIZE);
@ -90,7 +86,7 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
#ifdef CONFIG_X86_PAE
if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
if (after_init_bootmem)
if (after_bootmem)
pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
else
pmd_table = (pmd_t *)alloc_low_page();
@ -117,7 +113,7 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
pte_t *page_table = NULL;
if (after_init_bootmem) {
if (after_bootmem) {
#ifdef CONFIG_DEBUG_PAGEALLOC
page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
#endif
@ -168,12 +164,12 @@ static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
if (pmd_idx_kmap_begin != pmd_idx_kmap_end
&& (vaddr >> PMD_SHIFT) >= pmd_idx_kmap_begin
&& (vaddr >> PMD_SHIFT) <= pmd_idx_kmap_end
&& ((__pa(pte) >> PAGE_SHIFT) < table_start
|| (__pa(pte) >> PAGE_SHIFT) >= table_end)) {
&& ((__pa(pte) >> PAGE_SHIFT) < e820_table_start
|| (__pa(pte) >> PAGE_SHIFT) >= e820_table_end)) {
pte_t *newpte;
int i;
BUG_ON(after_init_bootmem);
BUG_ON(after_bootmem);
newpte = alloc_low_page();
for (i = 0; i < PTRS_PER_PTE; i++)
set_pte(newpte + i, pte[i]);
@ -242,11 +238,14 @@ static inline int is_kernel_text(unsigned long addr)
* of max_low_pfn pages, by creating page tables starting from address
* PAGE_OFFSET:
*/
static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
unsigned long start_pfn,
unsigned long end_pfn,
int use_pse)
unsigned long __init
kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask)
{
int use_pse = page_size_mask == (1<<PG_LEVEL_2M);
unsigned long start_pfn, end_pfn;
pgd_t *pgd_base = swapper_pg_dir;
int pgd_idx, pmd_idx, pte_ofs;
unsigned long pfn;
pgd_t *pgd;
@ -255,6 +254,9 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
unsigned pages_2m, pages_4k;
int mapping_iter;
start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
/*
* First iteration will setup identity mapping using large/small pages
* based on use_pse, with other attributes same as set by
@ -369,26 +371,6 @@ repeat:
mapping_iter = 2;
goto repeat;
}
}
/*
* devmem_is_allowed() checks to see if /dev/mem access to a certain address
* is valid. The argument is a physical page number.
*
*
* On x86, access has to be given to the first megabyte of ram because that area
* contains bios code and data regions used by X and dosemu and similar apps.
* Access has to be given to non-kernel-ram areas as well, these contain the PCI
* mmio resources as well as potential bios/acpi data regions.
*/
int devmem_is_allowed(unsigned long pagenr)
{
if (pagenr <= 256)
return 1;
if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
return 0;
if (!page_is_ram(pagenr))
return 1;
return 0;
}
@ -545,8 +527,9 @@ void __init native_pagetable_setup_done(pgd_t *base)
* be partially populated, and so it avoids stomping on any existing
* mappings.
*/
static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
void __init early_ioremap_page_table_range_init(void)
{
pgd_t *pgd_base = swapper_pg_dir;
unsigned long vaddr, end;
/*
@ -641,7 +624,7 @@ static int __init noexec_setup(char *str)
}
early_param("noexec", noexec_setup);
static void __init set_nx(void)
void __init set_nx(void)
{
unsigned int v[4], l, h;
@ -793,6 +776,8 @@ void __init initmem_init(unsigned long start_pfn,
#ifdef CONFIG_FLATMEM
max_mapnr = num_physpages;
#endif
__vmalloc_start_set = true;
printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
pages_to_mb(max_low_pfn));
@ -814,176 +799,61 @@ static void __init zone_sizes_init(void)
free_area_init_nodes(max_zone_pfns);
}
static unsigned long __init setup_node_bootmem(int nodeid,
unsigned long start_pfn,
unsigned long end_pfn,
unsigned long bootmap)
{
unsigned long bootmap_size;
if (start_pfn > max_low_pfn)
return bootmap;
if (end_pfn > max_low_pfn)
end_pfn = max_low_pfn;
/* don't touch min_low_pfn */
bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
bootmap >> PAGE_SHIFT,
start_pfn, end_pfn);
printk(KERN_INFO " node %d low ram: %08lx - %08lx\n",
nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
printk(KERN_INFO " node %d bootmap %08lx - %08lx\n",
nodeid, bootmap, bootmap + bootmap_size);
free_bootmem_with_active_regions(nodeid, end_pfn);
early_res_to_bootmem(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
return bootmap + bootmap_size;
}
void __init setup_bootmem_allocator(void)
{
int i;
int nodeid;
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,
bootmap = find_e820_area(0, 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");
/* don't touch min_low_pfn */
bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
min_low_pfn, 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);
printk(KERN_INFO " low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
after_init_bootmem = 1;
}
static void __init find_early_table_space(unsigned long end, int use_pse)
{
unsigned long puds, pmds, ptes, tables, start;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
if (use_pse) {
unsigned long extra;
extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
extra += PMD_SIZE;
ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else
ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
/* for fixmap */
tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
/*
* RED-PEN putting page tables only on node 0 could
* cause a hotspot and fill up ZONE_DMA. The page tables
* need roughly 0.5KB per GB.
*/
start = 0x7000;
table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
tables, PAGE_SIZE);
if (table_start == -1UL)
panic("Cannot find space for the kernel page tables");
table_start >>= PAGE_SHIFT;
table_end = table_start;
table_top = table_start + (tables>>PAGE_SHIFT);
printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, table_start << PAGE_SHIFT,
(table_start << PAGE_SHIFT) + tables);
}
unsigned long __init_refok init_memory_mapping(unsigned long start,
unsigned long end)
{
pgd_t *pgd_base = swapper_pg_dir;
unsigned long start_pfn, end_pfn;
unsigned long big_page_start;
#ifdef CONFIG_DEBUG_PAGEALLOC
/*
* For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
* This will simplify cpa(), which otherwise needs to support splitting
* large pages into small in interrupt context, etc.
*/
int use_pse = 0;
#ifdef CONFIG_NEED_MULTIPLE_NODES
for_each_online_node(nodeid)
bootmap = setup_node_bootmem(nodeid, node_start_pfn[nodeid],
node_end_pfn[nodeid], bootmap);
#else
int use_pse = cpu_has_pse;
bootmap = setup_node_bootmem(0, 0, max_low_pfn, bootmap);
#endif
/*
* Find space for the kernel direct mapping tables.
*/
if (!after_init_bootmem)
find_early_table_space(end, use_pse);
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk(KERN_INFO "NX (Execute Disable) protection: active\n");
#endif
/* Enable PSE if available */
if (cpu_has_pse)
set_in_cr4(X86_CR4_PSE);
/* Enable PGE if available */
if (cpu_has_pge) {
set_in_cr4(X86_CR4_PGE);
__supported_pte_mask |= _PAGE_GLOBAL;
}
/*
* Don't use a large page for the first 2/4MB of memory
* because there are often fixed size MTRRs in there
* and overlapping MTRRs into large pages can cause
* slowdowns.
*/
big_page_start = PMD_SIZE;
if (start < big_page_start) {
start_pfn = start >> PAGE_SHIFT;
end_pfn = min(big_page_start>>PAGE_SHIFT, end>>PAGE_SHIFT);
} else {
/* head is not big page alignment ? */
start_pfn = start >> PAGE_SHIFT;
end_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
}
if (start_pfn < end_pfn)
kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn, 0);
/* big page range */
start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
if (start_pfn < (big_page_start >> PAGE_SHIFT))
start_pfn = big_page_start >> PAGE_SHIFT;
end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
if (start_pfn < end_pfn)
kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn,
use_pse);
/* tail is not big page alignment ? */
start_pfn = end_pfn;
if (start_pfn > (big_page_start>>PAGE_SHIFT)) {
end_pfn = end >> PAGE_SHIFT;
if (start_pfn < end_pfn)
kernel_physical_mapping_init(pgd_base, start_pfn,
end_pfn, 0);
}
early_ioremap_page_table_range_init(pgd_base);
load_cr3(swapper_pg_dir);
__flush_tlb_all();
if (!after_init_bootmem)
reserve_early(table_start << PAGE_SHIFT,
table_end << PAGE_SHIFT, "PGTABLE");
if (!after_init_bootmem)
early_memtest(start, end);
return end >> PAGE_SHIFT;
after_bootmem = 1;
}
/*
* paging_init() sets up the page tables - note that the first 8MB are
* already mapped by head.S.
@ -1217,13 +1087,6 @@ void mark_rodata_ro(void)
}
#endif
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_init_pages("initrd memory", start, end);
}
#endif
int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
int flags)
{

272
arch/x86/mm/init_64.c
View File

@ -48,6 +48,7 @@
#include <asm/kdebug.h>
#include <asm/numa.h>
#include <asm/cacheflush.h>
#include <asm/init.h>
/*
* end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
@ -61,12 +62,6 @@ static unsigned long dma_reserve __initdata;
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
int direct_gbpages
#ifdef CONFIG_DIRECT_GBPAGES
= 1
#endif
;
static int __init parse_direct_gbpages_off(char *arg)
{
direct_gbpages = 0;
@ -87,8 +82,6 @@ early_param("gbpages", parse_direct_gbpages_on);
* around without checking the pgd every time.
*/
int after_bootmem;
pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
EXPORT_SYMBOL_GPL(__supported_pte_mask);
@ -325,13 +318,9 @@ void __init cleanup_highmap(void)
}
}
static unsigned long __initdata table_start;
static unsigned long __meminitdata table_end;
static unsigned long __meminitdata table_top;
static __ref void *alloc_low_page(unsigned long *phys)
{
unsigned long pfn = table_end++;
unsigned long pfn = e820_table_end++;
void *adr;
if (after_bootmem) {
@ -341,7 +330,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
return adr;
}
if (pfn >= table_top)
if (pfn >= e820_table_top)
panic("alloc_low_page: ran out of memory");
adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
@ -581,58 +570,10 @@ phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end,
return phys_pud_init(pud, addr, end, page_size_mask);
}
static void __init find_early_table_space(unsigned long end, int use_pse,
int use_gbpages)
{
unsigned long puds, pmds, ptes, tables, start;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
if (use_gbpages) {
unsigned long extra;
extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
} else
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
if (use_pse) {
unsigned long extra;
extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else
ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
/*
* RED-PEN putting page tables only on node 0 could
* cause a hotspot and fill up ZONE_DMA. The page tables
* need roughly 0.5KB per GB.
*/
start = 0x8000;
table_start = find_e820_area(start, end, tables, PAGE_SIZE);
if (table_start == -1UL)
panic("Cannot find space for the kernel page tables");
table_start >>= PAGE_SHIFT;
table_end = table_start;
table_top = table_start + (tables >> PAGE_SHIFT);
printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT);
}
static void __init init_gbpages(void)
{
if (direct_gbpages && cpu_has_gbpages)
printk(KERN_INFO "Using GB pages for direct mapping\n");
else
direct_gbpages = 0;
}
static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask)
unsigned long __init
kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask)
{
unsigned long next, last_map_addr = end;
@ -669,176 +610,6 @@ static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
return last_map_addr;
}
struct map_range {
unsigned long start;
unsigned long end;
unsigned page_size_mask;
};
#define NR_RANGE_MR 5
static int save_mr(struct map_range *mr, int nr_range,
unsigned long start_pfn, unsigned long end_pfn,
unsigned long page_size_mask)
{
if (start_pfn < end_pfn) {
if (nr_range >= NR_RANGE_MR)
panic("run out of range for init_memory_mapping\n");
mr[nr_range].start = start_pfn<<PAGE_SHIFT;
mr[nr_range].end = end_pfn<<PAGE_SHIFT;
mr[nr_range].page_size_mask = page_size_mask;
nr_range++;
}
return nr_range;
}
/*
* Setup the direct mapping of the physical memory at PAGE_OFFSET.
* This runs before bootmem is initialized and gets pages directly from
* the physical memory. To access them they are temporarily mapped.
*/
unsigned long __init_refok init_memory_mapping(unsigned long start,
unsigned long end)
{
unsigned long last_map_addr = 0;
unsigned long page_size_mask = 0;
unsigned long start_pfn, end_pfn;
unsigned long pos;
struct map_range mr[NR_RANGE_MR];
int nr_range, i;
int use_pse, use_gbpages;
printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
/*
* Find space for the kernel direct mapping tables.
*
* Later we should allocate these tables in the local node of the
* memory mapped. Unfortunately this is done currently before the
* nodes are discovered.
*/
if (!after_bootmem)
init_gbpages();
#ifdef CONFIG_DEBUG_PAGEALLOC
/*
* For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
* This will simplify cpa(), which otherwise needs to support splitting
* large pages into small in interrupt context, etc.
*/
use_pse = use_gbpages = 0;
#else
use_pse = cpu_has_pse;
use_gbpages = direct_gbpages;
#endif
if (use_gbpages)
page_size_mask |= 1 << PG_LEVEL_1G;
if (use_pse)
page_size_mask |= 1 << PG_LEVEL_2M;
memset(mr, 0, sizeof(mr));
nr_range = 0;
/* head if not big page alignment ?*/
start_pfn = start >> PAGE_SHIFT;
pos = start_pfn << PAGE_SHIFT;
end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
if (end_pfn > (end >> PAGE_SHIFT))
end_pfn = end >> PAGE_SHIFT;
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
pos = end_pfn << PAGE_SHIFT;
}
/* big page (2M) range*/
start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
<< (PUD_SHIFT - PAGE_SHIFT);
if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
pos = end_pfn << PAGE_SHIFT;
}
/* big page (1G) range */
start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
<< (PUD_SHIFT - PAGE_SHIFT);
end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask &
((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
pos = end_pfn << PAGE_SHIFT;
}
/* tail is not big page (1G) alignment */
start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
pos = end_pfn << PAGE_SHIFT;
}
/* tail is not big page (2M) alignment */
start_pfn = pos>>PAGE_SHIFT;
end_pfn = end>>PAGE_SHIFT;
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
/* try to merge same page size and continuous */
for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
unsigned long old_start;
if (mr[i].end != mr[i+1].start ||
mr[i].page_size_mask != mr[i+1].page_size_mask)
continue;
/* move it */
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
(nr_range - 1 - i) * sizeof (struct map_range));
mr[i--].start = old_start;
nr_range--;
}
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG " %010lx - %010lx page %s\n",
mr[i].start, mr[i].end,
(mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
(mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
if (!after_bootmem)
find_early_table_space(end, use_pse, use_gbpages);
for (i = 0; i < nr_range; i++)
last_map_addr = kernel_physical_mapping_init(
mr[i].start, mr[i].end,
mr[i].page_size_mask);
if (!after_bootmem)
mmu_cr4_features = read_cr4();
__flush_tlb_all();
if (!after_bootmem && table_end > table_start)
reserve_early(table_start << PAGE_SHIFT,
table_end << PAGE_SHIFT, "PGTABLE");
printk(KERN_INFO "last_map_addr: %lx end: %lx\n",
last_map_addr, end);
if (!after_bootmem)
early_memtest(start, end);
return last_map_addr >> PAGE_SHIFT;
}
#ifndef CONFIG_NUMA
void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
@ -910,28 +681,6 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif /* CONFIG_MEMORY_HOTPLUG */
/*
* devmem_is_allowed() checks to see if /dev/mem access to a certain address
* is valid. The argument is a physical page number.
*
*
* On x86, access has to be given to the first megabyte of ram because that area
* contains bios code and data regions used by X and dosemu and similar apps.
* Access has to be given to non-kernel-ram areas as well, these contain the PCI
* mmio resources as well as potential bios/acpi data regions.
*/
int devmem_is_allowed(unsigned long pagenr)
{
if (pagenr <= 256)
return 1;
if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
return 0;
if (!page_is_ram(pagenr))
return 1;
return 0;
}
static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
kcore_modules, kcore_vsyscall;
@ -1019,13 +768,6 @@ void mark_rodata_ro(void)
#endif
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_init_pages("initrd memory", start, end);
}
#endif
int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
int flags)
{

14
arch/x86/mm/ioremap.c
View File

@ -38,8 +38,7 @@ unsigned long __phys_addr(unsigned long x)
} else {
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
x -= PAGE_OFFSET;
VIRTUAL_BUG_ON(system_state == SYSTEM_BOOTING ? x > MAXMEM :
!phys_addr_valid(x));
VIRTUAL_BUG_ON(!phys_addr_valid(x));
}
return x;
}
@ -56,10 +55,8 @@ bool __virt_addr_valid(unsigned long x)
if (x < PAGE_OFFSET)
return false;
x -= PAGE_OFFSET;
if (system_state == SYSTEM_BOOTING ?
x > MAXMEM : !phys_addr_valid(x)) {
if (!phys_addr_valid(x))
return false;
}
}
return pfn_valid(x >> PAGE_SHIFT);
@ -76,10 +73,9 @@ static inline int phys_addr_valid(unsigned long addr)
#ifdef CONFIG_DEBUG_VIRTUAL
unsigned long __phys_addr(unsigned long x)
{
/* VMALLOC_* aren't constants; not available at the boot time */
/* VMALLOC_* aren't constants */
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
is_vmalloc_addr((void *) x));
VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
return x - PAGE_OFFSET;
}
EXPORT_SYMBOL(__phys_addr);
@ -89,7 +85,7 @@ bool __virt_addr_valid(unsigned long x)
{
if (x < PAGE_OFFSET)
return false;
if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
return false;
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
}

5
arch/x86/mm/numa_32.c
View File

@ -416,10 +416,11 @@ void __init initmem_init(unsigned long start_pfn,
for_each_online_node(nid)
propagate_e820_map_node(nid);
for_each_online_node(nid)
for_each_online_node(nid) {
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
}
NODE_DATA(0)->bdata = &bootmem_node_data[0];
setup_bootmem_allocator();
}