[PATCH] w1: Adds a sysfs entry (w1_master_search) that allows you to disable/enable...
[linux-2.6/verdex.git] / include / asm-x86_64 / page.h
blob9ce338c3a71eb8fa5a2db09b5ce9b7c109f0654e
1 #ifndef _X86_64_PAGE_H
2 #define _X86_64_PAGE_H
4 #include <linux/config.h>
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))
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))
24 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
25 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
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 #define ARCH_HAS_HUGETLB_CLEAN_STALE_PGTABLE
33 #ifdef __KERNEL__
34 #ifndef __ASSEMBLY__
36 void clear_page(void *);
37 void copy_page(void *, void *);
39 #define clear_user_page(page, vaddr, pg) clear_page(page)
40 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
42 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
43 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
45 * These are used to make use of C type-checking..
47 typedef struct { unsigned long pte; } pte_t;
48 typedef struct { unsigned long pmd; } pmd_t;
49 typedef struct { unsigned long pud; } pud_t;
50 typedef struct { unsigned long pgd; } pgd_t;
51 #define PTE_MASK PHYSICAL_PAGE_MASK
53 typedef struct { unsigned long pgprot; } pgprot_t;
55 #define pte_val(x) ((x).pte)
56 #define pmd_val(x) ((x).pmd)
57 #define pud_val(x) ((x).pud)
58 #define pgd_val(x) ((x).pgd)
59 #define pgprot_val(x) ((x).pgprot)
61 #define __pte(x) ((pte_t) { (x) } )
62 #define __pmd(x) ((pmd_t) { (x) } )
63 #define __pud(x) ((pud_t) { (x) } )
64 #define __pgd(x) ((pgd_t) { (x) } )
65 #define __pgprot(x) ((pgprot_t) { (x) } )
67 #define __START_KERNEL 0xffffffff80100000UL
68 #define __START_KERNEL_map 0xffffffff80000000UL
69 #define __PAGE_OFFSET 0xffff810000000000UL
71 #else
72 #define __START_KERNEL 0xffffffff80100000
73 #define __START_KERNEL_map 0xffffffff80000000
74 #define __PAGE_OFFSET 0xffff810000000000
75 #endif /* !__ASSEMBLY__ */
77 /* to align the pointer to the (next) page boundary */
78 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
80 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
81 #define __PHYSICAL_MASK_SHIFT 46
82 #define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
83 #define __VIRTUAL_MASK_SHIFT 48
84 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
86 #define KERNEL_TEXT_SIZE (40UL*1024*1024)
87 #define KERNEL_TEXT_START 0xffffffff80000000UL
89 #ifndef __ASSEMBLY__
91 #include <asm/bug.h>
93 /* Pure 2^n version of get_order */
94 extern __inline__ int get_order(unsigned long size)
96 int order;
98 size = (size-1) >> (PAGE_SHIFT-1);
99 order = -1;
100 do {
101 size >>= 1;
102 order++;
103 } while (size);
104 return order;
107 #endif /* __ASSEMBLY__ */
109 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
111 /* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
112 Otherwise you risk miscompilation. */
113 #define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
114 /* __pa_symbol should be used for C visible symbols.
115 This seems to be the official gcc blessed way to do such arithmetic. */
116 #define __pa_symbol(x) \
117 ({unsigned long v; \
118 asm("" : "=r" (v) : "0" (x)); \
119 __pa(v); })
121 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
122 #ifndef CONFIG_DISCONTIGMEM
123 #define pfn_to_page(pfn) (mem_map + (pfn))
124 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
125 #define pfn_valid(pfn) ((pfn) < max_mapnr)
126 #endif
128 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
129 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
130 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
132 #define VM_DATA_DEFAULT_FLAGS \
133 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
134 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
136 #define __HAVE_ARCH_GATE_AREA 1
138 #endif /* __KERNEL__ */
140 #endif /* _X86_64_PAGE_H */