Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _X86_64_PAGE_H |
2 | #define _X86_64_PAGE_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #ifdef __ASSEMBLY__ | |
9 | #define PAGE_SIZE (0x1 << PAGE_SHIFT) | |
10 | #else | |
11 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
12 | #endif | |
13 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
14 | #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & (__PHYSICAL_MASK << PAGE_SHIFT)) | |
15 | ||
16 | #define THREAD_ORDER 1 | |
17 | #ifdef __ASSEMBLY__ | |
18 | #define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER)) | |
19 | #else | |
20 | #define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER)) | |
21 | #endif | |
22 | #define CURRENT_MASK (~(THREAD_SIZE-1)) | |
23 | ||
24 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) | |
25 | #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) | |
26 | ||
27 | #define HPAGE_SHIFT PMD_SHIFT | |
28 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
29 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
30 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
31 | ||
32 | #ifdef __KERNEL__ | |
33 | #ifndef __ASSEMBLY__ | |
34 | ||
35 | void clear_page(void *); | |
36 | void copy_page(void *, void *); | |
37 | ||
38 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
39 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
40 | ||
41 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
42 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
43 | /* | |
44 | * These are used to make use of C type-checking.. | |
45 | */ | |
46 | typedef struct { unsigned long pte; } pte_t; | |
47 | typedef struct { unsigned long pmd; } pmd_t; | |
48 | typedef struct { unsigned long pud; } pud_t; | |
49 | typedef struct { unsigned long pgd; } pgd_t; | |
50 | #define PTE_MASK PHYSICAL_PAGE_MASK | |
51 | ||
52 | typedef struct { unsigned long pgprot; } pgprot_t; | |
53 | ||
54 | #define pte_val(x) ((x).pte) | |
55 | #define pmd_val(x) ((x).pmd) | |
56 | #define pud_val(x) ((x).pud) | |
57 | #define pgd_val(x) ((x).pgd) | |
58 | #define pgprot_val(x) ((x).pgprot) | |
59 | ||
60 | #define __pte(x) ((pte_t) { (x) } ) | |
61 | #define __pmd(x) ((pmd_t) { (x) } ) | |
62 | #define __pud(x) ((pud_t) { (x) } ) | |
63 | #define __pgd(x) ((pgd_t) { (x) } ) | |
64 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
65 | ||
66 | #define __START_KERNEL 0xffffffff80100000UL | |
67 | #define __START_KERNEL_map 0xffffffff80000000UL | |
68 | #define __PAGE_OFFSET 0xffff810000000000UL | |
69 | ||
70 | #else | |
71 | #define __START_KERNEL 0xffffffff80100000 | |
72 | #define __START_KERNEL_map 0xffffffff80000000 | |
73 | #define __PAGE_OFFSET 0xffff810000000000 | |
74 | #endif /* !__ASSEMBLY__ */ | |
75 | ||
76 | /* to align the pointer to the (next) page boundary */ | |
77 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
78 | ||
79 | /* See Documentation/x86_64/mm.txt for a description of the memory map. */ | |
80 | #define __PHYSICAL_MASK_SHIFT 46 | |
81 | #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1) | |
82 | #define __VIRTUAL_MASK_SHIFT 48 | |
83 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) | |
84 | ||
85 | #define KERNEL_TEXT_SIZE (40UL*1024*1024) | |
86 | #define KERNEL_TEXT_START 0xffffffff80000000UL | |
87 | ||
88 | #ifndef __ASSEMBLY__ | |
89 | ||
90 | #include <asm/bug.h> | |
91 | ||
92 | /* Pure 2^n version of get_order */ | |
93 | extern __inline__ int get_order(unsigned long size) | |
94 | { | |
95 | int order; | |
96 | ||
97 | size = (size-1) >> (PAGE_SHIFT-1); | |
98 | order = -1; | |
99 | do { | |
100 | size >>= 1; | |
101 | order++; | |
102 | } while (size); | |
103 | return order; | |
104 | } | |
105 | ||
106 | #endif /* __ASSEMBLY__ */ | |
107 | ||
108 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
109 | ||
110 | /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol. | |
111 | Otherwise you risk miscompilation. */ | |
112 | #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET) | |
113 | /* __pa_symbol should be used for C visible symbols. | |
114 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
115 | #define __pa_symbol(x) \ | |
116 | ({unsigned long v; \ | |
117 | asm("" : "=r" (v) : "0" (x)); \ | |
118 | __pa(v); }) | |
119 | ||
120 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
121 | #ifndef CONFIG_DISCONTIGMEM | |
122 | #define pfn_to_page(pfn) (mem_map + (pfn)) | |
123 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) | |
124 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
125 | #endif | |
126 | ||
127 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
128 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
129 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
130 | ||
131 | #define VM_DATA_DEFAULT_FLAGS \ | |
132 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
133 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
134 | ||
135 | #define __HAVE_ARCH_GATE_AREA 1 | |
136 | ||
137 | #endif /* __KERNEL__ */ | |
138 | ||
139 | #endif /* _X86_64_PAGE_H */ |