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6bc9a396 CL |
1 | #ifndef _ASM_SCORE_PGTABLE_H |
2 | #define _ASM_SCORE_PGTABLE_H | |
3 | ||
4 | #include <linux/const.h> | |
5 | #include <asm-generic/pgtable-nopmd.h> | |
6 | ||
7 | #include <asm/fixmap.h> | |
8 | #include <asm/setup.h> | |
9 | #include <asm/pgtable-bits.h> | |
10 | ||
11 | extern void load_pgd(unsigned long pg_dir); | |
12 | extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)]; | |
13 | ||
14 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
15 | #define PGDIR_SHIFT 22 | |
16 | #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) | |
17 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) | |
18 | ||
19 | /* | |
20 | * Entries per page directory level: we use two-level, so | |
21 | * we don't really have any PUD/PMD directory physically. | |
22 | */ | |
23 | #define PGD_ORDER 0 | |
24 | #define PTE_ORDER 0 | |
25 | ||
26 | #define PTRS_PER_PGD 1024 | |
27 | #define PTRS_PER_PTE 1024 | |
28 | ||
29 | #define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) | |
30 | #define FIRST_USER_ADDRESS 0 | |
31 | ||
32 | #define VMALLOC_START (0xc0000000UL) | |
33 | ||
34 | #define PKMAP_BASE (0xfd000000UL) | |
35 | ||
36 | #define VMALLOC_END (FIXADDR_START - 2*PAGE_SIZE) | |
37 | ||
38 | #define pte_ERROR(e) \ | |
39 | printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ | |
40 | __FILE__, __LINE__, pte_val(e)) | |
41 | #define pgd_ERROR(e) \ | |
42 | printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ | |
43 | __FILE__, __LINE__, pgd_val(e)) | |
44 | ||
45 | /* | |
46 | * Empty pgd/pmd entries point to the invalid_pte_table. | |
47 | */ | |
48 | static inline int pmd_none(pmd_t pmd) | |
49 | { | |
50 | return pmd_val(pmd) == (unsigned long) invalid_pte_table; | |
51 | } | |
52 | ||
53 | #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) | |
54 | ||
55 | static inline int pmd_present(pmd_t pmd) | |
56 | { | |
57 | return pmd_val(pmd) != (unsigned long) invalid_pte_table; | |
58 | } | |
59 | ||
60 | static inline void pmd_clear(pmd_t *pmdp) | |
61 | { | |
62 | pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); | |
63 | } | |
64 | ||
65 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
66 | #define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT)) | |
67 | #define pfn_pte(pfn, prot) \ | |
68 | __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
69 | ||
70 | #define __pgd_offset(address) pgd_index(address) | |
71 | #define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) | |
72 | #define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) | |
73 | ||
74 | /* to find an entry in a kernel page-table-directory */ | |
75 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
76 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) | |
77 | ||
78 | /* to find an entry in a page-table-directory */ | |
79 | #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) | |
80 | ||
81 | /* Find an entry in the third-level page table.. */ | |
82 | #define __pte_offset(address) \ | |
83 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) | |
84 | #define pte_offset(dir, address) \ | |
85 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) | |
86 | #define pte_offset_kernel(dir, address) \ | |
87 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) | |
88 | ||
89 | #define pte_offset_map(dir, address) \ | |
90 | ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) | |
91 | #define pte_offset_map_nested(dir, address) \ | |
92 | ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) | |
93 | #define pte_unmap(pte) ((void)(pte)) | |
94 | #define pte_unmap_nested(pte) ((void)(pte)) | |
95 | ||
96 | /* | |
97 | * Bits 9(_PAGE_PRESENT) and 10(_PAGE_FILE)are taken, | |
98 | * split up 30 bits of offset into this range: | |
99 | */ | |
100 | #define PTE_FILE_MAX_BITS 30 | |
101 | #define pte_to_pgoff(_pte) \ | |
102 | (((_pte).pte & 0x1ff) | (((_pte).pte >> 11) << 9)) | |
103 | #define pgoff_to_pte(off) \ | |
104 | ((pte_t) {((off) & 0x1ff) | (((off) >> 9) << 11) | _PAGE_FILE}) | |
105 | #define __pte_to_swp_entry(pte) \ | |
106 | ((swp_entry_t) { pte_val(pte)}) | |
107 | #define __swp_entry_to_pte(x) ((pte_t) {(x).val}) | |
108 | ||
ffa818b4 CL |
109 | #define pmd_phys(pmd) __pa((void *)pmd_val(pmd)) |
110 | #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) | |
6bc9a396 CL |
111 | #define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot) |
112 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } | |
113 | ||
114 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
115 | #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) | |
116 | #define pte_clear(mm, addr, xp) \ | |
117 | do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) | |
118 | ||
119 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ | |
120 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
121 | ||
0402c91a CL |
122 | /* |
123 | * The "pgd_xxx()" functions here are trivial for a folded two-level | |
124 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | |
125 | * into the pgd entry) | |
126 | */ | |
127 | #define pgd_present(pgd) (1) | |
6bc9a396 CL |
128 | #define pgd_none(pgd) (0) |
129 | #define pgd_bad(pgd) (0) | |
0402c91a | 130 | #define pgd_clear(pgdp) do { } while (0) |
6bc9a396 CL |
131 | |
132 | #define kern_addr_valid(addr) (1) | |
6bc9a396 CL |
133 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
134 | ||
135 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
136 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
137 | ||
0402c91a CL |
138 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE) |
139 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ | |
140 | _PAGE_CACHE) | |
141 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) | |
142 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) | |
143 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ | |
144 | _PAGE_GLOBAL | _PAGE_CACHE) | |
145 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ | |
146 | __WRITEABLE | _PAGE_GLOBAL & ~_PAGE_CACHE) | |
147 | ||
148 | #define __P000 PAGE_NONE | |
149 | #define __P001 PAGE_READONLY | |
150 | #define __P010 PAGE_COPY | |
151 | #define __P011 PAGE_COPY | |
152 | #define __P100 PAGE_READONLY | |
153 | #define __P101 PAGE_READONLY | |
154 | #define __P110 PAGE_COPY | |
155 | #define __P111 PAGE_COPY | |
156 | ||
157 | #define __S000 PAGE_NONE | |
158 | #define __S001 PAGE_READONLY | |
159 | #define __S010 PAGE_SHARED | |
160 | #define __S011 PAGE_SHARED | |
161 | #define __S100 PAGE_READONLY | |
162 | #define __S101 PAGE_READONLY | |
163 | #define __S110 PAGE_SHARED | |
164 | #define __S111 PAGE_SHARED | |
6bc9a396 | 165 | |
ffa818b4 CL |
166 | #define pgprot_noncached pgprot_noncached |
167 | ||
168 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
169 | { | |
170 | unsigned long prot = pgprot_val(_prot); | |
171 | ||
172 | prot = (prot & ~_CACHE_MASK); | |
173 | ||
174 | return __pgprot(prot); | |
175 | } | |
6bc9a396 | 176 | |
ffa818b4 CL |
177 | #define __swp_type(x) ((x).val & 0x1f) |
178 | #define __swp_offset(x) ((x).val >> 11) | |
179 | #define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 11)}) | |
6bc9a396 | 180 | |
ffa818b4 CL |
181 | extern unsigned long empty_zero_page; |
182 | extern unsigned long zero_page_mask; | |
6bc9a396 | 183 | |
ffa818b4 CL |
184 | #define ZERO_PAGE(vaddr) \ |
185 | (virt_to_page((void *)(empty_zero_page + \ | |
186 | (((unsigned long)(vaddr)) & zero_page_mask)))) | |
6bc9a396 CL |
187 | |
188 | #define pgtable_cache_init() do {} while (0) | |
189 | ||
190 | #define arch_enter_lazy_cpu_mode() do {} while (0) | |
191 | ||
192 | static inline int pte_write(pte_t pte) | |
193 | { | |
194 | return pte_val(pte) & _PAGE_WRITE; | |
195 | } | |
196 | ||
197 | static inline int pte_dirty(pte_t pte) | |
198 | { | |
199 | return pte_val(pte) & _PAGE_MODIFIED; | |
200 | } | |
201 | ||
202 | static inline int pte_young(pte_t pte) | |
203 | { | |
204 | return pte_val(pte) & _PAGE_ACCESSED; | |
205 | } | |
206 | ||
207 | static inline int pte_file(pte_t pte) | |
208 | { | |
209 | return pte_val(pte) & _PAGE_FILE; | |
210 | } | |
211 | ||
212 | #define pte_special(pte) (0) | |
213 | ||
214 | static inline pte_t pte_wrprotect(pte_t pte) | |
215 | { | |
216 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
217 | return pte; | |
218 | } | |
219 | ||
220 | static inline pte_t pte_mkclean(pte_t pte) | |
221 | { | |
222 | pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE); | |
223 | return pte; | |
224 | } | |
225 | ||
226 | static inline pte_t pte_mkold(pte_t pte) | |
227 | { | |
228 | pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
229 | return pte; | |
230 | } | |
231 | ||
232 | static inline pte_t pte_mkwrite(pte_t pte) | |
233 | { | |
234 | pte_val(pte) |= _PAGE_WRITE; | |
235 | if (pte_val(pte) & _PAGE_MODIFIED) | |
236 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
237 | return pte; | |
238 | } | |
239 | ||
240 | static inline pte_t pte_mkdirty(pte_t pte) | |
241 | { | |
242 | pte_val(pte) |= _PAGE_MODIFIED; | |
243 | if (pte_val(pte) & _PAGE_WRITE) | |
244 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
245 | return pte; | |
246 | } | |
247 | ||
248 | static inline pte_t pte_mkyoung(pte_t pte) | |
249 | { | |
250 | pte_val(pte) |= _PAGE_ACCESSED; | |
251 | if (pte_val(pte) & _PAGE_READ) | |
252 | pte_val(pte) |= _PAGE_SILENT_READ; | |
253 | return pte; | |
254 | } | |
255 | ||
256 | #define set_pmd(pmdptr, pmdval) \ | |
257 | do { *(pmdptr) = (pmdval); } while (0) | |
258 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
259 | ||
260 | extern unsigned long pgd_current; | |
ffa818b4 | 261 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
6bc9a396 CL |
262 | extern void paging_init(void); |
263 | ||
264 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
265 | { | |
266 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)); | |
267 | } | |
268 | ||
269 | extern void __update_tlb(struct vm_area_struct *vma, | |
270 | unsigned long address, pte_t pte); | |
271 | extern void __update_cache(struct vm_area_struct *vma, | |
272 | unsigned long address, pte_t pte); | |
273 | ||
274 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
4b3073e1 | 275 | unsigned long address, pte_t *ptep) |
6bc9a396 | 276 | { |
4b3073e1 | 277 | pte_t pte = *ptep; |
6bc9a396 CL |
278 | __update_tlb(vma, address, pte); |
279 | __update_cache(vma, address, pte); | |
280 | } | |
281 | ||
282 | #ifndef __ASSEMBLY__ | |
283 | #include <asm-generic/pgtable.h> | |
284 | ||
285 | void setup_memory(void); | |
286 | #endif /* __ASSEMBLY__ */ | |
287 | ||
288 | #endif /* _ASM_SCORE_PGTABLE_H */ |