Jeremy Fitzhardinge | f402a65 | 2009-02-08 18:49:05 -0800 | [diff] [blame] | 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) |
Jeremy Fitzhardinge | dc16ecf | 2009-03-04 16:10:44 -0800 | [diff] [blame] | 28 | |
| 29 | #ifndef __ASSEMBLER__ |
| 30 | extern bool __vmalloc_start_set; /* set once high_memory is set */ |
| 31 | #endif |
| 32 | |
Jeremy Fitzhardinge | f402a65 | 2009-02-08 18:49:05 -0800 | [diff] [blame] | 33 | #define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET) |
| 34 | #ifdef CONFIG_X86_PAE |
| 35 | #define LAST_PKMAP 512 |
| 36 | #else |
| 37 | #define LAST_PKMAP 1024 |
| 38 | #endif |
| 39 | |
| 40 | #define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \ |
| 41 | & PMD_MASK) |
| 42 | |
| 43 | #ifdef CONFIG_HIGHMEM |
| 44 | # define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE) |
| 45 | #else |
| 46 | # define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE) |
| 47 | #endif |
| 48 | |
Amerigo Wang | c398df3 | 2009-06-03 21:46:46 -0400 | [diff] [blame^] | 49 | #define MODULES_VADDR VMALLOC_START |
| 50 | #define MODULES_END VMALLOC_END |
| 51 | #define MODULES_LEN (MODULES_VADDR - MODULES_END) |
| 52 | |
Jeremy Fitzhardinge | f402a65 | 2009-02-08 18:49:05 -0800 | [diff] [blame] | 53 | #define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) |
| 54 | |
| 55 | #endif /* _ASM_X86_PGTABLE_32_DEFS_H */ |