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f5e706ad SR |
1 | #ifndef _SPARC64_PAGE_H |
2 | #define _SPARC64_PAGE_H | |
3 | ||
4 | #include <linux/const.h> | |
5 | ||
f5e706ad | 6 | #define PAGE_SHIFT 13 |
f5e706ad SR |
7 | |
8 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
9 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
10 | ||
11 | /* Flushing for D-cache alias handling is only needed if | |
12 | * the page size is smaller than 16K. | |
13 | */ | |
14 | #if PAGE_SHIFT < 14 | |
15 | #define DCACHE_ALIASING_POSSIBLE | |
16 | #endif | |
17 | ||
37b3a8ff DM |
18 | #define HPAGE_SHIFT 23 |
19 | #define REAL_HPAGE_SHIFT 22 | |
20 | ||
21 | #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) | |
f5e706ad | 22 | |
9e695d2e | 23 | #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) |
f5e706ad SR |
24 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) |
25 | #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) | |
26 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
27 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
28 | #endif | |
29 | ||
30 | #ifndef __ASSEMBLY__ | |
31 | ||
9e695d2e | 32 | #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) |
0fbebed6 | 33 | struct pt_regs; |
f05a6865 | 34 | void hugetlb_setup(struct pt_regs *regs); |
9e695d2e DM |
35 | #endif |
36 | ||
b0f1e796 DM |
37 | #define WANT_PAGE_VIRTUAL |
38 | ||
f05a6865 | 39 | void _clear_page(void *page); |
f5e706ad SR |
40 | #define clear_page(X) _clear_page((void *)(X)) |
41 | struct page; | |
f05a6865 | 42 | void clear_user_page(void *addr, unsigned long vaddr, struct page *page); |
f5e706ad | 43 | #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) |
f05a6865 | 44 | void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); |
f5e706ad SR |
45 | |
46 | /* Unlike sparc32, sparc64's parameter passing API is more | |
47 | * sane in that structures which as small enough are passed | |
48 | * in registers instead of on the stack. Thus, setting | |
49 | * STRICT_MM_TYPECHECKS does not generate worse code so | |
50 | * let's enable it to get the type checking. | |
51 | */ | |
52 | ||
53 | #define STRICT_MM_TYPECHECKS | |
54 | ||
55 | #ifdef STRICT_MM_TYPECHECKS | |
56 | /* These are used to make use of C type-checking.. */ | |
57 | typedef struct { unsigned long pte; } pte_t; | |
58 | typedef struct { unsigned long iopte; } iopte_t; | |
2b77933c DM |
59 | typedef struct { unsigned long pmd; } pmd_t; |
60 | typedef struct { unsigned long pgd; } pgd_t; | |
f5e706ad SR |
61 | typedef struct { unsigned long pgprot; } pgprot_t; |
62 | ||
63 | #define pte_val(x) ((x).pte) | |
64 | #define iopte_val(x) ((x).iopte) | |
65 | #define pmd_val(x) ((x).pmd) | |
66 | #define pgd_val(x) ((x).pgd) | |
67 | #define pgprot_val(x) ((x).pgprot) | |
68 | ||
69 | #define __pte(x) ((pte_t) { (x) } ) | |
70 | #define __iopte(x) ((iopte_t) { (x) } ) | |
71 | #define __pmd(x) ((pmd_t) { (x) } ) | |
72 | #define __pgd(x) ((pgd_t) { (x) } ) | |
73 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
74 | ||
75 | #else | |
76 | /* .. while these make it easier on the compiler */ | |
77 | typedef unsigned long pte_t; | |
78 | typedef unsigned long iopte_t; | |
2b77933c DM |
79 | typedef unsigned long pmd_t; |
80 | typedef unsigned long pgd_t; | |
f5e706ad SR |
81 | typedef unsigned long pgprot_t; |
82 | ||
83 | #define pte_val(x) (x) | |
84 | #define iopte_val(x) (x) | |
85 | #define pmd_val(x) (x) | |
86 | #define pgd_val(x) (x) | |
87 | #define pgprot_val(x) (x) | |
88 | ||
89 | #define __pte(x) (x) | |
90 | #define __iopte(x) (x) | |
91 | #define __pmd(x) (x) | |
92 | #define __pgd(x) (x) | |
93 | #define __pgprot(x) (x) | |
94 | ||
95 | #endif /* (STRICT_MM_TYPECHECKS) */ | |
96 | ||
c460bec7 | 97 | typedef pte_t *pgtable_t; |
f5e706ad | 98 | |
c920745e | 99 | /* These two values define the virtual address space range in which we |
2b77933c DM |
100 | * must forbid 64-bit user processes from making mappings. It used to |
101 | * represent precisely the virtual address space hole present in most | |
102 | * early sparc64 chips including UltraSPARC-I. But now it also is | |
103 | * further constrained by the limits of our page tables, which is | |
104 | * 43-bits of virtual address. | |
c920745e | 105 | */ |
2b77933c DM |
106 | #define SPARC64_VA_HOLE_TOP _AC(0xfffffc0000000000,UL) |
107 | #define SPARC64_VA_HOLE_BOTTOM _AC(0x0000040000000000,UL) | |
c920745e | 108 | |
2b77933c DM |
109 | /* The next two defines specify the actual exclusion region we |
110 | * enforce, wherein we use a 4GB red zone on each side of the VA hole. | |
111 | */ | |
c920745e DM |
112 | #define VA_EXCLUDE_START (SPARC64_VA_HOLE_BOTTOM - (1UL << 32UL)) |
113 | #define VA_EXCLUDE_END (SPARC64_VA_HOLE_TOP + (1UL << 32UL)) | |
114 | ||
f5e706ad | 115 | #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ |
c920745e DM |
116 | _AC(0x0000000070000000,UL) : \ |
117 | VA_EXCLUDE_END) | |
f5e706ad SR |
118 | |
119 | #include <asm-generic/memory_model.h> | |
120 | ||
e0a45e35 | 121 | #define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X))) |
b2d43834 | 122 | extern unsigned long PAGE_OFFSET; |
f5e706ad | 123 | |
b2d43834 | 124 | #endif /* !(__ASSEMBLY__) */ |
bb7b4353 | 125 | |
b2d43834 DM |
126 | /* The maximum number of physical memory address bits we support, this |
127 | * is used to size various tables used to manage kernel TLB misses and | |
128 | * also the sparsemem code. | |
bb7b4353 | 129 | */ |
b2d43834 | 130 | #define MAX_PHYS_ADDRESS_BITS 47 |
bb7b4353 DM |
131 | |
132 | /* These two shift counts are used when indexing sparc64_valid_addr_bitmap | |
133 | * and kpte_linear_bitmap. | |
134 | */ | |
135 | #define ILOG2_4MB 22 | |
136 | #define ILOG2_256MB 28 | |
137 | ||
f5e706ad SR |
138 | #ifndef __ASSEMBLY__ |
139 | ||
140 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) | |
141 | #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) | |
142 | ||
143 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
144 | ||
145 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) | |
146 | ||
147 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
148 | ||
149 | #define virt_to_phys __pa | |
150 | #define phys_to_virt __va | |
151 | ||
152 | #endif /* !(__ASSEMBLY__) */ | |
153 | ||
154 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
155 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
156 | ||
5b17e1cd | 157 | #include <asm-generic/getorder.h> |
f5e706ad SR |
158 | |
159 | #endif /* _SPARC64_PAGE_H */ |