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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 | ||
09087a1a DW |
6 | #ifdef __KERNEL__ |
7 | ||
1da177e4 LT |
8 | #include <asm/const.h> |
9 | ||
10 | #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) | |
11 | #define PAGE_SHIFT 13 | |
12 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) | |
13 | #define PAGE_SHIFT 16 | |
14 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB) | |
15 | #define PAGE_SHIFT 19 | |
16 | #elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB) | |
17 | #define PAGE_SHIFT 22 | |
18 | #else | |
19 | #error No page size specified in kernel configuration | |
20 | #endif | |
21 | ||
22 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
23 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
24 | ||
6a9b490d DM |
25 | /* Flushing for D-cache alias handling is only needed if |
26 | * the page size is smaller than 16K. | |
27 | */ | |
28 | #if PAGE_SHIFT < 14 | |
29 | #define DCACHE_ALIASING_POSSIBLE | |
30 | #endif | |
31 | ||
dcc1e8dd DM |
32 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) |
33 | #define HPAGE_SHIFT 22 | |
34 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
35 | #define HPAGE_SHIFT 19 | |
36 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
37 | #define HPAGE_SHIFT 16 | |
38 | #endif | |
39 | ||
40 | #ifdef CONFIG_HUGETLB_PAGE | |
41 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
42 | #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) | |
43 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
44 | #define ARCH_HAS_SETCLEAR_HUGE_PTE | |
45 | #define ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
46 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
47 | #endif | |
48 | ||
1da177e4 LT |
49 | #ifndef __ASSEMBLY__ |
50 | ||
51 | extern void _clear_page(void *page); | |
52 | #define clear_page(X) _clear_page((void *)(X)) | |
53 | struct page; | |
54 | extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); | |
55 | #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) | |
56 | extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); | |
57 | ||
58 | /* Unlike sparc32, sparc64's parameter passing API is more | |
59 | * sane in that structures which as small enough are passed | |
60 | * in registers instead of on the stack. Thus, setting | |
61 | * STRICT_MM_TYPECHECKS does not generate worse code so | |
62 | * let's enable it to get the type checking. | |
63 | */ | |
64 | ||
65 | #define STRICT_MM_TYPECHECKS | |
66 | ||
67 | #ifdef STRICT_MM_TYPECHECKS | |
68 | /* These are used to make use of C type-checking.. */ | |
69 | typedef struct { unsigned long pte; } pte_t; | |
70 | typedef struct { unsigned long iopte; } iopte_t; | |
71 | typedef struct { unsigned int pmd; } pmd_t; | |
72 | typedef struct { unsigned int pgd; } pgd_t; | |
73 | typedef struct { unsigned long pgprot; } pgprot_t; | |
74 | ||
75 | #define pte_val(x) ((x).pte) | |
76 | #define iopte_val(x) ((x).iopte) | |
77 | #define pmd_val(x) ((x).pmd) | |
78 | #define pgd_val(x) ((x).pgd) | |
79 | #define pgprot_val(x) ((x).pgprot) | |
80 | ||
81 | #define __pte(x) ((pte_t) { (x) } ) | |
82 | #define __iopte(x) ((iopte_t) { (x) } ) | |
83 | #define __pmd(x) ((pmd_t) { (x) } ) | |
84 | #define __pgd(x) ((pgd_t) { (x) } ) | |
85 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
86 | ||
87 | #else | |
88 | /* .. while these make it easier on the compiler */ | |
89 | typedef unsigned long pte_t; | |
90 | typedef unsigned long iopte_t; | |
91 | typedef unsigned int pmd_t; | |
92 | typedef unsigned int pgd_t; | |
93 | typedef unsigned long pgprot_t; | |
94 | ||
95 | #define pte_val(x) (x) | |
96 | #define iopte_val(x) (x) | |
97 | #define pmd_val(x) (x) | |
98 | #define pgd_val(x) (x) | |
99 | #define pgprot_val(x) (x) | |
100 | ||
101 | #define __pte(x) (x) | |
102 | #define __iopte(x) (x) | |
103 | #define __pmd(x) (x) | |
104 | #define __pgd(x) (x) | |
105 | #define __pgprot(x) (x) | |
106 | ||
107 | #endif /* (STRICT_MM_TYPECHECKS) */ | |
108 | ||
1da177e4 | 109 | #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ |
8bcd1741 DM |
110 | (_AC(0x0000000070000000,UL)) : \ |
111 | (_AC(0xfffff80000000000,UL) + (1UL << 32UL))) | |
1da177e4 | 112 | |
a117e66e KH |
113 | #include <asm-generic/memory_model.h> |
114 | ||
1da177e4 LT |
115 | #endif /* !(__ASSEMBLY__) */ |
116 | ||
117 | /* to align the pointer to the (next) page boundary */ | |
118 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
119 | ||
120 | /* We used to stick this into a hard-coded global register (%g4) | |
121 | * but that does not make sense anymore. | |
122 | */ | |
123 | #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) | |
124 | ||
125 | #ifndef __ASSEMBLY__ | |
126 | ||
127 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) | |
128 | #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) | |
129 | ||
d1112018 | 130 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
1da177e4 LT |
131 | |
132 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) | |
133 | ||
1da177e4 LT |
134 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
135 | ||
136 | #define virt_to_phys __pa | |
137 | #define phys_to_virt __va | |
138 | ||
1da177e4 LT |
139 | #endif /* !(__ASSEMBLY__) */ |
140 | ||
141 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
142 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
143 | ||
fd4fd5aa SR |
144 | #include <asm-generic/page.h> |
145 | ||
09087a1a DW |
146 | #endif /* __KERNEL__ */ |
147 | #endif /* _SPARC64_PAGE_H */ |