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51c78eb3 JF |
1 | #ifndef _ASM_X86_PAGE_DEFS_H |
2 | #define _ASM_X86_PAGE_DEFS_H | |
3 | ||
4 | #include <linux/const.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
9 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
10 | ||
11 | #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) | |
12 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) | |
13 | ||
14 | /* Cast PAGE_MASK to a signed type so that it is sign-extended if | |
15 | virtual addresses are 32-bits but physical addresses are larger | |
16 | (ie, 32-bit PAE). */ | |
17 | #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) | |
18 | ||
51c78eb3 JF |
19 | #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) |
20 | #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) | |
21 | ||
22 | #define HPAGE_SHIFT PMD_SHIFT | |
23 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
24 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
25 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
26 | ||
27 | #define HUGE_MAX_HSTATE 2 | |
28 | ||
29 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
30 | ||
31 | #define VM_DATA_DEFAULT_FLAGS \ | |
32 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
33 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
34 | ||
35 | #ifdef CONFIG_X86_64 | |
36 | #include <asm/page_64_types.h> | |
37 | #else | |
38 | #include <asm/page_32_types.h> | |
39 | #endif /* CONFIG_X86_64 */ | |
40 | ||
41 | #ifndef __ASSEMBLY__ | |
42 | ||
51c78eb3 | 43 | extern int devmem_is_allowed(unsigned long pagenr); |
51c78eb3 JF |
44 | |
45 | extern unsigned long max_low_pfn_mapped; | |
46 | extern unsigned long max_pfn_mapped; | |
47 | ||
66aa230e JSR |
48 | extern unsigned long init_memory_mapping(unsigned long start, |
49 | unsigned long end); | |
50 | ||
8ee2debc DR |
51 | extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn, |
52 | int acpi, int k8); | |
66aa230e JSR |
53 | extern void free_initmem(void); |
54 | ||
51c78eb3 JF |
55 | #endif /* !__ASSEMBLY__ */ |
56 | ||
57 | #endif /* _ASM_X86_PAGE_DEFS_H */ |