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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6bc9a396 CL |
2 | #ifndef _ASM_SCORE_PGTABLE_H |
3 | #define _ASM_SCORE_PGTABLE_H | |
4 | ||
5 | #include <linux/const.h> | |
9849a569 | 6 | #define __ARCH_USE_5LEVEL_HACK |
6bc9a396 CL |
7 | #include <asm-generic/pgtable-nopmd.h> |
8 | ||
9 | #include <asm/fixmap.h> | |
10 | #include <asm/setup.h> | |
11 | #include <asm/pgtable-bits.h> | |
12 | ||
13 | extern void load_pgd(unsigned long pg_dir); | |
14 | extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)]; | |
15 | ||
16 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | |
17 | #define PGDIR_SHIFT 22 | |
18 | #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) | |
19 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) | |
20 | ||
21 | /* | |
22 | * Entries per page directory level: we use two-level, so | |
23 | * we don't really have any PUD/PMD directory physically. | |
24 | */ | |
25 | #define PGD_ORDER 0 | |
26 | #define PTE_ORDER 0 | |
27 | ||
28 | #define PTRS_PER_PGD 1024 | |
29 | #define PTRS_PER_PTE 1024 | |
30 | ||
31 | #define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) | |
d016bf7e | 32 | #define FIRST_USER_ADDRESS 0UL |
6bc9a396 CL |
33 | |
34 | #define VMALLOC_START (0xc0000000UL) | |
35 | ||
36 | #define PKMAP_BASE (0xfd000000UL) | |
37 | ||
38 | #define VMALLOC_END (FIXADDR_START - 2*PAGE_SIZE) | |
39 | ||
40 | #define pte_ERROR(e) \ | |
41 | printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ | |
42 | __FILE__, __LINE__, pte_val(e)) | |
43 | #define pgd_ERROR(e) \ | |
44 | printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ | |
45 | __FILE__, __LINE__, pgd_val(e)) | |
46 | ||
47 | /* | |
48 | * Empty pgd/pmd entries point to the invalid_pte_table. | |
49 | */ | |
50 | static inline int pmd_none(pmd_t pmd) | |
51 | { | |
52 | return pmd_val(pmd) == (unsigned long) invalid_pte_table; | |
53 | } | |
54 | ||
55 | #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) | |
56 | ||
57 | static inline int pmd_present(pmd_t pmd) | |
58 | { | |
59 | return pmd_val(pmd) != (unsigned long) invalid_pte_table; | |
60 | } | |
61 | ||
62 | static inline void pmd_clear(pmd_t *pmdp) | |
63 | { | |
64 | pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); | |
65 | } | |
66 | ||
67 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
68 | #define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT)) | |
69 | #define pfn_pte(pfn, prot) \ | |
70 | __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
71 | ||
72 | #define __pgd_offset(address) pgd_index(address) | |
73 | #define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) | |
74 | #define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) | |
75 | ||
76 | /* to find an entry in a kernel page-table-directory */ | |
77 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
78 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) | |
79 | ||
80 | /* to find an entry in a page-table-directory */ | |
81 | #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) | |
82 | ||
83 | /* Find an entry in the third-level page table.. */ | |
84 | #define __pte_offset(address) \ | |
85 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) | |
86 | #define pte_offset(dir, address) \ | |
87 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) | |
88 | #define pte_offset_kernel(dir, address) \ | |
89 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) | |
90 | ||
91 | #define pte_offset_map(dir, address) \ | |
92 | ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) | |
6bc9a396 | 93 | #define pte_unmap(pte) ((void)(pte)) |
6bc9a396 | 94 | |
6bc9a396 CL |
95 | #define __pte_to_swp_entry(pte) \ |
96 | ((swp_entry_t) { pte_val(pte)}) | |
97 | #define __swp_entry_to_pte(x) ((pte_t) {(x).val}) | |
98 | ||
ffa818b4 CL |
99 | #define pmd_phys(pmd) __pa((void *)pmd_val(pmd)) |
100 | #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) | |
6bc9a396 CL |
101 | #define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot) |
102 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } | |
103 | ||
104 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
105 | #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) | |
106 | #define pte_clear(mm, addr, xp) \ | |
107 | do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) | |
108 | ||
0402c91a CL |
109 | /* |
110 | * The "pgd_xxx()" functions here are trivial for a folded two-level | |
111 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | |
112 | * into the pgd entry) | |
113 | */ | |
114 | #define pgd_present(pgd) (1) | |
6bc9a396 CL |
115 | #define pgd_none(pgd) (0) |
116 | #define pgd_bad(pgd) (0) | |
0402c91a | 117 | #define pgd_clear(pgdp) do { } while (0) |
6bc9a396 CL |
118 | |
119 | #define kern_addr_valid(addr) (1) | |
6bc9a396 CL |
120 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
121 | ||
122 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
123 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
124 | ||
0402c91a CL |
125 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE) |
126 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ | |
127 | _PAGE_CACHE) | |
128 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) | |
129 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) | |
130 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ | |
131 | _PAGE_GLOBAL | _PAGE_CACHE) | |
132 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ | |
133 | __WRITEABLE | _PAGE_GLOBAL & ~_PAGE_CACHE) | |
134 | ||
135 | #define __P000 PAGE_NONE | |
136 | #define __P001 PAGE_READONLY | |
137 | #define __P010 PAGE_COPY | |
138 | #define __P011 PAGE_COPY | |
139 | #define __P100 PAGE_READONLY | |
140 | #define __P101 PAGE_READONLY | |
141 | #define __P110 PAGE_COPY | |
142 | #define __P111 PAGE_COPY | |
143 | ||
144 | #define __S000 PAGE_NONE | |
145 | #define __S001 PAGE_READONLY | |
146 | #define __S010 PAGE_SHARED | |
147 | #define __S011 PAGE_SHARED | |
148 | #define __S100 PAGE_READONLY | |
149 | #define __S101 PAGE_READONLY | |
150 | #define __S110 PAGE_SHARED | |
151 | #define __S111 PAGE_SHARED | |
6bc9a396 | 152 | |
ffa818b4 CL |
153 | #define pgprot_noncached pgprot_noncached |
154 | ||
155 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
156 | { | |
157 | unsigned long prot = pgprot_val(_prot); | |
158 | ||
159 | prot = (prot & ~_CACHE_MASK); | |
160 | ||
161 | return __pgprot(prot); | |
162 | } | |
6bc9a396 | 163 | |
ffa818b4 | 164 | #define __swp_type(x) ((x).val & 0x1f) |
917e401e KS |
165 | #define __swp_offset(x) ((x).val >> 10) |
166 | #define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 10)}) | |
6bc9a396 | 167 | |
ffa818b4 CL |
168 | extern unsigned long empty_zero_page; |
169 | extern unsigned long zero_page_mask; | |
6bc9a396 | 170 | |
ffa818b4 CL |
171 | #define ZERO_PAGE(vaddr) \ |
172 | (virt_to_page((void *)(empty_zero_page + \ | |
173 | (((unsigned long)(vaddr)) & zero_page_mask)))) | |
6bc9a396 CL |
174 | |
175 | #define pgtable_cache_init() do {} while (0) | |
176 | ||
177 | #define arch_enter_lazy_cpu_mode() do {} while (0) | |
178 | ||
179 | static inline int pte_write(pte_t pte) | |
180 | { | |
181 | return pte_val(pte) & _PAGE_WRITE; | |
182 | } | |
183 | ||
184 | static inline int pte_dirty(pte_t pte) | |
185 | { | |
186 | return pte_val(pte) & _PAGE_MODIFIED; | |
187 | } | |
188 | ||
189 | static inline int pte_young(pte_t pte) | |
190 | { | |
191 | return pte_val(pte) & _PAGE_ACCESSED; | |
192 | } | |
193 | ||
6bc9a396 CL |
194 | #define pte_special(pte) (0) |
195 | ||
196 | static inline pte_t pte_wrprotect(pte_t pte) | |
197 | { | |
198 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
199 | return pte; | |
200 | } | |
201 | ||
202 | static inline pte_t pte_mkclean(pte_t pte) | |
203 | { | |
204 | pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE); | |
205 | return pte; | |
206 | } | |
207 | ||
208 | static inline pte_t pte_mkold(pte_t pte) | |
209 | { | |
210 | pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
211 | return pte; | |
212 | } | |
213 | ||
214 | static inline pte_t pte_mkwrite(pte_t pte) | |
215 | { | |
216 | pte_val(pte) |= _PAGE_WRITE; | |
217 | if (pte_val(pte) & _PAGE_MODIFIED) | |
218 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
219 | return pte; | |
220 | } | |
221 | ||
222 | static inline pte_t pte_mkdirty(pte_t pte) | |
223 | { | |
224 | pte_val(pte) |= _PAGE_MODIFIED; | |
225 | if (pte_val(pte) & _PAGE_WRITE) | |
226 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
227 | return pte; | |
228 | } | |
229 | ||
230 | static inline pte_t pte_mkyoung(pte_t pte) | |
231 | { | |
232 | pte_val(pte) |= _PAGE_ACCESSED; | |
233 | if (pte_val(pte) & _PAGE_READ) | |
234 | pte_val(pte) |= _PAGE_SILENT_READ; | |
235 | return pte; | |
236 | } | |
237 | ||
238 | #define set_pmd(pmdptr, pmdval) \ | |
239 | do { *(pmdptr) = (pmdval); } while (0) | |
240 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
241 | ||
242 | extern unsigned long pgd_current; | |
ffa818b4 | 243 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
6bc9a396 CL |
244 | extern void paging_init(void); |
245 | ||
246 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
247 | { | |
248 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)); | |
249 | } | |
250 | ||
251 | extern void __update_tlb(struct vm_area_struct *vma, | |
252 | unsigned long address, pte_t pte); | |
253 | extern void __update_cache(struct vm_area_struct *vma, | |
254 | unsigned long address, pte_t pte); | |
255 | ||
256 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
4b3073e1 | 257 | unsigned long address, pte_t *ptep) |
6bc9a396 | 258 | { |
4b3073e1 | 259 | pte_t pte = *ptep; |
6bc9a396 CL |
260 | __update_tlb(vma, address, pte); |
261 | __update_cache(vma, address, pte); | |
262 | } | |
263 | ||
264 | #ifndef __ASSEMBLY__ | |
265 | #include <asm-generic/pgtable.h> | |
266 | ||
267 | void setup_memory(void); | |
268 | #endif /* __ASSEMBLY__ */ | |
269 | ||
270 | #endif /* _ASM_SCORE_PGTABLE_H */ |