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-rw-r--r--arch/x86/include/asm/pgtable_32.h42
-rw-r--r--arch/x86/include/asm/pgtable_32_types.h46
2 files changed, 47 insertions, 41 deletions
diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h
index 72d20e2a40f..97612fc7632 100644
--- a/arch/x86/include/asm/pgtable_32.h
+++ b/arch/x86/include/asm/pgtable_32.h
@@ -1,6 +1,7 @@
1#ifndef _ASM_X86_PGTABLE_32_H 1#ifndef _ASM_X86_PGTABLE_32_H
2#define _ASM_X86_PGTABLE_32_H 2#define _ASM_X86_PGTABLE_32_H
3 3
4#include <asm/pgtable_32_types.h>
4 5
5/* 6/*
6 * The Linux memory management assumes a three-level page table setup. On 7 * The Linux memory management assumes a three-level page table setup. On
@@ -33,47 +34,6 @@ void paging_init(void);
33 34
34extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t); 35extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
35 36
36/*
37 * The Linux x86 paging architecture is 'compile-time dual-mode', it
38 * implements both the traditional 2-level x86 page tables and the
39 * newer 3-level PAE-mode page tables.
40 */
41#ifdef CONFIG_X86_PAE
42# include <asm/pgtable-3level_types.h>
43# define PMD_SIZE (1UL << PMD_SHIFT)
44# define PMD_MASK (~(PMD_SIZE - 1))
45#else
46# include <asm/pgtable-2level_types.h>
47#endif
48
49#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
50#define PGDIR_MASK (~(PGDIR_SIZE - 1))
51
52/* Just any arbitrary offset to the start of the vmalloc VM area: the
53 * current 8MB value just means that there will be a 8MB "hole" after the
54 * physical memory until the kernel virtual memory starts. That means that
55 * any out-of-bounds memory accesses will hopefully be caught.
56 * The vmalloc() routines leaves a hole of 4kB between each vmalloced
57 * area for the same reason. ;)
58 */
59#define VMALLOC_OFFSET (8 * 1024 * 1024)
60#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
61#ifdef CONFIG_X86_PAE
62#define LAST_PKMAP 512
63#else
64#define LAST_PKMAP 1024
65#endif
66
67#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
68 & PMD_MASK)
69
70#ifdef CONFIG_HIGHMEM
71# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
72#else
73# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
74#endif
75
76#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
77 37
78/* 38/*
79 * Define this if things work differently on an i386 and an i486: 39 * Define this if things work differently on an i386 and an i486:
diff --git a/arch/x86/include/asm/pgtable_32_types.h b/arch/x86/include/asm/pgtable_32_types.h
new file mode 100644
index 00000000000..bd8df3b2fe0
--- /dev/null
+++ b/arch/x86/include/asm/pgtable_32_types.h
@@ -0,0 +1,46 @@
1#ifndef _ASM_X86_PGTABLE_32_DEFS_H
2#define _ASM_X86_PGTABLE_32_DEFS_H
3
4/*
5 * The Linux x86 paging architecture is 'compile-time dual-mode', it
6 * implements both the traditional 2-level x86 page tables and the
7 * newer 3-level PAE-mode page tables.
8 */
9#ifdef CONFIG_X86_PAE
10# include <asm/pgtable-3level_types.h>
11# define PMD_SIZE (1UL << PMD_SHIFT)
12# define PMD_MASK (~(PMD_SIZE - 1))
13#else
14# include <asm/pgtable-2level_types.h>
15#endif
16
17#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
18#define PGDIR_MASK (~(PGDIR_SIZE - 1))
19
20/* Just any arbitrary offset to the start of the vmalloc VM area: the
21 * current 8MB value just means that there will be a 8MB "hole" after the
22 * physical memory until the kernel virtual memory starts. That means that
23 * any out-of-bounds memory accesses will hopefully be caught.
24 * The vmalloc() routines leaves a hole of 4kB between each vmalloced
25 * area for the same reason. ;)
26 */
27#define VMALLOC_OFFSET (8 * 1024 * 1024)
28#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
29#ifdef CONFIG_X86_PAE
30#define LAST_PKMAP 512
31#else
32#define LAST_PKMAP 1024
33#endif
34
35#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
36 & PMD_MASK)
37
38#ifdef CONFIG_HIGHMEM
39# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
40#else
41# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
42#endif
43
44#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
45
46#endif /* _ASM_X86_PGTABLE_32_DEFS_H */