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1da177e4 LT |
1 | /* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */ |
2 | ||
3 | #ifndef _SPARC64_PAGE_H | |
4 | #define _SPARC64_PAGE_H | |
5 | ||
6 | #include <linux/config.h> | |
7 | #include <asm/const.h> | |
8 | ||
9 | #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) | |
10 | #define PAGE_SHIFT 13 | |
11 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) | |
12 | #define PAGE_SHIFT 16 | |
13 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB) | |
14 | #define PAGE_SHIFT 19 | |
15 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB) | |
16 | #define PAGE_SHIFT 22 | |
17 | #else | |
18 | #error No page size specified in kernel configuration | |
19 | #endif | |
20 | ||
21 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
22 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
23 | ||
6a9b490d DM |
24 | /* Flushing for D-cache alias handling is only needed if |
25 | * the page size is smaller than 16K. | |
26 | */ | |
27 | #if PAGE_SHIFT < 14 | |
28 | #define DCACHE_ALIASING_POSSIBLE | |
29 | #endif | |
30 | ||
1da177e4 LT |
31 | #ifdef __KERNEL__ |
32 | ||
dcc1e8dd DM |
33 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) |
34 | #define HPAGE_SHIFT 22 | |
35 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
36 | #define HPAGE_SHIFT 19 | |
37 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
38 | #define HPAGE_SHIFT 16 | |
39 | #endif | |
40 | ||
41 | #ifdef CONFIG_HUGETLB_PAGE | |
42 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
43 | #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) | |
44 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
45 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
46 | #define ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
47 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
48 | #endif | |
49 | ||
1da177e4 LT |
50 | #ifndef __ASSEMBLY__ |
51 | ||
52 | extern void _clear_page(void *page); | |
53 | #define clear_page(X) _clear_page((void *)(X)) | |
54 | struct page; | |
55 | extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); | |
56 | #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) | |
57 | extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); | |
58 | ||
59 | /* Unlike sparc32, sparc64's parameter passing API is more | |
60 | * sane in that structures which as small enough are passed | |
61 | * in registers instead of on the stack. Thus, setting | |
62 | * STRICT_MM_TYPECHECKS does not generate worse code so | |
63 | * let's enable it to get the type checking. | |
64 | */ | |
65 | ||
66 | #define STRICT_MM_TYPECHECKS | |
67 | ||
68 | #ifdef STRICT_MM_TYPECHECKS | |
69 | /* These are used to make use of C type-checking.. */ | |
70 | typedef struct { unsigned long pte; } pte_t; | |
71 | typedef struct { unsigned long iopte; } iopte_t; | |
72 | typedef struct { unsigned int pmd; } pmd_t; | |
73 | typedef struct { unsigned int pgd; } pgd_t; | |
74 | typedef struct { unsigned long pgprot; } pgprot_t; | |
75 | ||
76 | #define pte_val(x) ((x).pte) | |
77 | #define iopte_val(x) ((x).iopte) | |
78 | #define pmd_val(x) ((x).pmd) | |
79 | #define pgd_val(x) ((x).pgd) | |
80 | #define pgprot_val(x) ((x).pgprot) | |
81 | ||
82 | #define __pte(x) ((pte_t) { (x) } ) | |
83 | #define __iopte(x) ((iopte_t) { (x) } ) | |
84 | #define __pmd(x) ((pmd_t) { (x) } ) | |
85 | #define __pgd(x) ((pgd_t) { (x) } ) | |
86 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
87 | ||
88 | #else | |
89 | /* .. while these make it easier on the compiler */ | |
90 | typedef unsigned long pte_t; | |
91 | typedef unsigned long iopte_t; | |
92 | typedef unsigned int pmd_t; | |
93 | typedef unsigned int pgd_t; | |
94 | typedef unsigned long pgprot_t; | |
95 | ||
96 | #define pte_val(x) (x) | |
97 | #define iopte_val(x) (x) | |
98 | #define pmd_val(x) (x) | |
99 | #define pgd_val(x) (x) | |
100 | #define pgprot_val(x) (x) | |
101 | ||
102 | #define __pte(x) (x) | |
103 | #define __iopte(x) (x) | |
104 | #define __pmd(x) (x) | |
105 | #define __pgd(x) (x) | |
106 | #define __pgprot(x) (x) | |
107 | ||
108 | #endif /* (STRICT_MM_TYPECHECKS) */ | |
109 | ||
1da177e4 | 110 | #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ |
8bcd1741 DM |
111 | (_AC(0x0000000070000000,UL)) : \ |
112 | (_AC(0xfffff80000000000,UL) + (1UL << 32UL))) | |
1da177e4 | 113 | |
a117e66e KH |
114 | #include <asm-generic/memory_model.h> |
115 | ||
1da177e4 LT |
116 | #endif /* !(__ASSEMBLY__) */ |
117 | ||
118 | /* to align the pointer to the (next) page boundary */ | |
119 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
120 | ||
121 | /* We used to stick this into a hard-coded global register (%g4) | |
122 | * but that does not make sense anymore. | |
123 | */ | |
124 | #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) | |
125 | ||
126 | #ifndef __ASSEMBLY__ | |
127 | ||
128 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) | |
129 | #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) | |
130 | ||
d1112018 | 131 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
1da177e4 LT |
132 | |
133 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) | |
134 | ||
1da177e4 LT |
135 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
136 | ||
137 | #define virt_to_phys __pa | |
138 | #define phys_to_virt __va | |
139 | ||
1da177e4 LT |
140 | #endif /* !(__ASSEMBLY__) */ |
141 | ||
142 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
143 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
144 | ||
145 | #endif /* !(__KERNEL__) */ | |
146 | ||
fd4fd5aa SR |
147 | #include <asm-generic/page.h> |
148 | ||
1da177e4 | 149 | #endif /* !(_SPARC64_PAGE_H) */ |