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Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +01001#ifndef _ASM_X86_PAGE_H
2#define _ASM_X86_PAGE_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
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +010011#ifdef __KERNEL__
12
Jeremy Fitzhardingec57c05d2008-05-20 08:26:19 +010013#define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
14#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
15
Jeremy Fitzhardinge2bd3a99c2008-05-20 08:26:17 +010016/* Cast PAGE_MASK to a signed type so that it is sign-extended if
17 virtual addresses are 32-bits but physical addresses are larger
18 (ie, 32-bit PAE). */
19#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
20
Jeremy Fitzhardinge59438c92008-07-21 22:59:42 -070021/* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
22#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010023
Jeremy Fitzhardinge77be1fa2008-07-21 22:59:56 -070024/* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
25#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
26
Andi Kleen31422c52008-02-04 16:48:08 +010027#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
28#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010029
30#define HPAGE_SHIFT PMD_SHIFT
31#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
32#define HPAGE_MASK (~(HPAGE_SIZE - 1))
33#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
34
Andi Kleenb4718e62008-07-23 21:27:51 -070035#define HUGE_MAX_HSTATE 2
36
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010037/* to align the pointer to the (next) page boundary */
38#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
39
Ingo Molnar3da1bcc2008-01-30 13:32:42 +010040#ifndef __ASSEMBLY__
41#include <linux/types.h>
42#endif
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010043
44#ifdef CONFIG_X86_64
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +010045#include <asm/page_64.h>
46#else
47#include <asm/page_32.h>
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010048#endif /* CONFIG_X86_64 */
49
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010050#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
51
52#define VM_DATA_DEFAULT_FLAGS \
53 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
54 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
55
56
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010057#ifndef __ASSEMBLY__
Thomas Gleixner5f5192b2008-01-30 13:34:06 +010058
Thomas Gleixner635ee412008-05-12 15:43:35 +020059typedef struct { pgdval_t pgd; } pgd_t;
60typedef struct { pgprotval_t pgprot; } pgprot_t;
61
Thomas Gleixner5f5192b2008-01-30 13:34:06 +010062extern int page_is_ram(unsigned long pagenr);
Arjan van de Venae531c22008-04-24 23:40:47 +020063extern int devmem_is_allowed(unsigned long pagenr);
Thomas Gleixner635ee412008-05-12 15:43:35 +020064extern void map_devmem(unsigned long pfn, unsigned long size,
65 pgprot_t vma_prot);
66extern void unmap_devmem(unsigned long pfn, unsigned long size,
67 pgprot_t vma_prot);
Thomas Gleixner5f5192b2008-01-30 13:34:06 +010068
Yinghai Luf361a452008-07-10 20:38:26 -070069extern unsigned long max_low_pfn_mapped;
Thomas Gleixner67794292008-03-21 21:27:10 +010070extern unsigned long max_pfn_mapped;
Andi Kleen7d1116a2008-03-12 03:53:27 +010071
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010072struct page;
73
Chuck Leverf2f7abc2008-03-04 14:55:45 -080074static inline void clear_user_page(void *page, unsigned long vaddr,
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010075 struct page *pg)
76{
77 clear_page(page);
78}
79
Chuck Leverf2f7abc2008-03-04 14:55:45 -080080static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010081 struct page *topage)
82{
83 copy_page(to, from);
84}
85
86#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
87 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
88#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
89
Ingo Molnar38f0f122008-01-30 13:32:43 +010090static inline pgd_t native_make_pgd(pgdval_t val)
91{
92 return (pgd_t) { val };
93}
94
95static inline pgdval_t native_pgd_val(pgd_t pgd)
96{
97 return pgd.pgd;
98}
99
100#if PAGETABLE_LEVELS >= 3
101#if PAGETABLE_LEVELS == 4
102typedef struct { pudval_t pud; } pud_t;
103
104static inline pud_t native_make_pud(pmdval_t val)
105{
106 return (pud_t) { val };
107}
108
109static inline pudval_t native_pud_val(pud_t pud)
110{
111 return pud.pud;
112}
113#else /* PAGETABLE_LEVELS == 3 */
114#include <asm-generic/pgtable-nopud.h>
Jeremy Fitzhardinge2f98b2f2008-01-30 13:33:14 +0100115
116static inline pudval_t native_pud_val(pud_t pud)
117{
118 return native_pgd_val(pud.pgd);
119}
Ingo Molnar38f0f122008-01-30 13:32:43 +0100120#endif /* PAGETABLE_LEVELS == 4 */
121
122typedef struct { pmdval_t pmd; } pmd_t;
123
124static inline pmd_t native_make_pmd(pmdval_t val)
125{
126 return (pmd_t) { val };
127}
128
129static inline pmdval_t native_pmd_val(pmd_t pmd)
130{
131 return pmd.pmd;
132}
133#else /* PAGETABLE_LEVELS == 2 */
134#include <asm-generic/pgtable-nopmd.h>
Jeremy Fitzhardinge2f98b2f2008-01-30 13:33:14 +0100135
136static inline pmdval_t native_pmd_val(pmd_t pmd)
137{
138 return native_pgd_val(pmd.pud.pgd);
139}
Ingo Molnar38f0f122008-01-30 13:32:43 +0100140#endif /* PAGETABLE_LEVELS >= 3 */
141
Jeremy Fitzhardingec8e53932008-01-30 13:32:57 +0100142static inline pte_t native_make_pte(pteval_t val)
143{
144 return (pte_t) { .pte = val };
145}
146
147static inline pteval_t native_pte_val(pte_t pte)
148{
149 return pte.pte;
150}
151
Rusty Russellc2e32772008-07-22 15:40:46 +1000152static inline pteval_t native_pte_flags(pte_t pte)
153{
Jeremy Fitzhardinge77be1fa2008-07-21 22:59:56 -0700154 return native_pte_val(pte) & PTE_FLAGS_MASK;
Rusty Russellc2e32772008-07-22 15:40:46 +1000155}
156
Ingo Molnar38f0f122008-01-30 13:32:43 +0100157#define pgprot_val(x) ((x).pgprot)
158#define __pgprot(x) ((pgprot_t) { (x) } )
159
160#ifdef CONFIG_PARAVIRT
161#include <asm/paravirt.h>
162#else /* !CONFIG_PARAVIRT */
163
164#define pgd_val(x) native_pgd_val(x)
165#define __pgd(x) native_make_pgd(x)
166
167#ifndef __PAGETABLE_PUD_FOLDED
168#define pud_val(x) native_pud_val(x)
169#define __pud(x) native_make_pud(x)
170#endif
171
172#ifndef __PAGETABLE_PMD_FOLDED
173#define pmd_val(x) native_pmd_val(x)
174#define __pmd(x) native_make_pmd(x)
175#endif
176
177#define pte_val(x) native_pte_val(x)
Rusty Russellc2e32772008-07-22 15:40:46 +1000178#define pte_flags(x) native_pte_flags(x)
Ingo Molnar38f0f122008-01-30 13:32:43 +0100179#define __pte(x) native_make_pte(x)
180
181#endif /* CONFIG_PARAVIRT */
182
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +0100183#define __pa(x) __phys_addr((unsigned long)(x))
184/* __pa_symbol should be used for C visible symbols.
185 This seems to be the official gcc blessed way to do such arithmetic. */
186#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
187
188#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
189
190#define __boot_va(x) __va(x)
191#define __boot_pa(x) __pa(x)
192
193#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
194#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
195#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
196
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +0100197#endif /* __ASSEMBLY__ */
198
Jeremy Fitzhardingee62f4472008-01-30 13:32:44 +0100199#include <asm-generic/memory_model.h>
200#include <asm-generic/page.h>
201
202#define __HAVE_ARCH_GATE_AREA 1
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +0100203
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +0100204#endif /* __KERNEL__ */
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +0100205#endif /* _ASM_X86_PAGE_H */