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| Rev | Author | Line No. | Line |
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| 5270 | serge | 1 | #ifndef _ASM_X86_PGTABLE_32_DEFS_H |
| 2 | #define _ASM_X86_PGTABLE_32_DEFS_H |
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| 3 | |||
| 4 | /* |
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| 5 | * The Linux x86 paging architecture is 'compile-time dual-mode', it |
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| 6 | * implements both the traditional 2-level x86 page tables and the |
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| 7 | * newer 3-level PAE-mode page tables. |
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| 8 | */ |
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| 9 | #ifdef CONFIG_X86_PAE |
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| 10 | # include |
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| 11 | # define PMD_SIZE (1UL << PMD_SHIFT) |
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| 12 | # define PMD_MASK (~(PMD_SIZE - 1)) |
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| 13 | #else |
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| 14 | # include |
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| 15 | #endif |
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| 16 | |||
| 17 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
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| 18 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
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| 19 | |||
| 20 | /* Just any arbitrary offset to the start of the vmalloc VM area: the |
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| 21 | * current 8MB value just means that there will be a 8MB "hole" after the |
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| 22 | * physical memory until the kernel virtual memory starts. That means that |
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| 23 | * any out-of-bounds memory accesses will hopefully be caught. |
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| 24 | * The vmalloc() routines leaves a hole of 4kB between each vmalloced |
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| 25 | * area for the same reason. ;) |
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| 26 | */ |
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| 27 | #define VMALLOC_OFFSET (8 * 1024 * 1024) |
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| 28 | |||
| 29 | #ifndef __ASSEMBLY__ |
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| 30 | extern bool __vmalloc_start_set; /* set once high_memory is set */ |
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| 31 | #endif |
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| 32 | |||
| 33 | #define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET) |
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| 34 | #ifdef CONFIG_X86_PAE |
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| 35 | #define LAST_PKMAP 512 |
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| 36 | #else |
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| 37 | #define LAST_PKMAP 1024 |
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| 38 | #endif |
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| 39 | |||
| 40 | #define PKMAP_BASE ((FIXADDR_START - PAGE_SIZE * (LAST_PKMAP + 1)) \ |
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| 41 | & PMD_MASK) |
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| 42 | |||
| 43 | #ifdef CONFIG_HIGHMEM |
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| 44 | # define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE) |
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| 45 | #else |
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| 46 | # define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE) |
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| 47 | #endif |
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| 48 | |||
| 49 | #define MODULES_VADDR VMALLOC_START |
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| 50 | #define MODULES_END VMALLOC_END |
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| 51 | #define MODULES_LEN (MODULES_VADDR - MODULES_END) |
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| 52 | |||
| 53 | #define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) |
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| 54 | |||
| 55 | #endif /* _ASM_X86_PGTABLE_32_DEFS_H */ |