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1da177e4 LT |
1 | #ifndef _SUN3_PGTABLE_H |
2 | #define _SUN3_PGTABLE_H | |
3 | ||
4 | #include <asm/sun3mmu.h> | |
5 | ||
6 | #ifndef __ASSEMBLY__ | |
7 | #include <asm/virtconvert.h> | |
8 | #include <linux/linkage.h> | |
9 | ||
10 | /* | |
11 | * This file contains all the things which change drastically for the sun3 | |
12 | * pagetable stuff, to avoid making too much of a mess of the generic m68k | |
13 | * `pgtable.h'; this should only be included from the generic file. --m | |
14 | */ | |
15 | ||
16 | /* For virtual address to physical address conversion */ | |
17 | #define VTOP(addr) __pa(addr) | |
18 | #define PTOV(addr) __va(addr) | |
19 | ||
20 | ||
21 | #endif /* !__ASSEMBLY__ */ | |
22 | ||
23 | /* These need to be defined for compatibility although the sun3 doesn't use them */ | |
24 | #define _PAGE_NOCACHE030 0x040 | |
25 | #define _CACHEMASK040 (~0x060) | |
26 | #define _PAGE_NOCACHE_S 0x040 | |
27 | ||
28 | /* Page protection values within PTE. */ | |
29 | #define SUN3_PAGE_VALID (0x80000000) | |
30 | #define SUN3_PAGE_WRITEABLE (0x40000000) | |
31 | #define SUN3_PAGE_SYSTEM (0x20000000) | |
32 | #define SUN3_PAGE_NOCACHE (0x10000000) | |
33 | #define SUN3_PAGE_ACCESSED (0x02000000) | |
34 | #define SUN3_PAGE_MODIFIED (0x01000000) | |
35 | ||
36 | ||
37 | /* Externally used page protection values. */ | |
38 | #define _PAGE_PRESENT (SUN3_PAGE_VALID) | |
39 | #define _PAGE_ACCESSED (SUN3_PAGE_ACCESSED) | |
40 | ||
1da177e4 LT |
41 | /* Compound page protection values. */ |
42 | //todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix... | |
43 | // is it just PAGE_KERNEL and PAGE_SHARED? | |
44 | #define PAGE_NONE __pgprot(SUN3_PAGE_VALID \ | |
45 | | SUN3_PAGE_ACCESSED \ | |
46 | | SUN3_PAGE_NOCACHE) | |
47 | #define PAGE_SHARED __pgprot(SUN3_PAGE_VALID \ | |
48 | | SUN3_PAGE_WRITEABLE \ | |
49 | | SUN3_PAGE_ACCESSED \ | |
50 | | SUN3_PAGE_NOCACHE) | |
51 | #define PAGE_COPY __pgprot(SUN3_PAGE_VALID \ | |
52 | | SUN3_PAGE_ACCESSED \ | |
53 | | SUN3_PAGE_NOCACHE) | |
54 | #define PAGE_READONLY __pgprot(SUN3_PAGE_VALID \ | |
55 | | SUN3_PAGE_ACCESSED \ | |
56 | | SUN3_PAGE_NOCACHE) | |
57 | #define PAGE_KERNEL __pgprot(SUN3_PAGE_VALID \ | |
58 | | SUN3_PAGE_WRITEABLE \ | |
59 | | SUN3_PAGE_SYSTEM \ | |
60 | | SUN3_PAGE_NOCACHE \ | |
61 | | SUN3_PAGE_ACCESSED \ | |
62 | | SUN3_PAGE_MODIFIED) | |
63 | #define PAGE_INIT __pgprot(SUN3_PAGE_VALID \ | |
64 | | SUN3_PAGE_WRITEABLE \ | |
65 | | SUN3_PAGE_SYSTEM \ | |
66 | | SUN3_PAGE_NOCACHE) | |
67 | ||
68 | /* | |
69 | * Page protections for initialising protection_map. The sun3 has only two | |
70 | * protection settings, valid (implying read and execute) and writeable. These | |
71 | * are as close as we can get... | |
72 | */ | |
73 | #define __P000 PAGE_NONE | |
74 | #define __P001 PAGE_READONLY | |
75 | #define __P010 PAGE_COPY | |
76 | #define __P011 PAGE_COPY | |
77 | #define __P100 PAGE_READONLY | |
78 | #define __P101 PAGE_READONLY | |
79 | #define __P110 PAGE_COPY | |
80 | #define __P111 PAGE_COPY | |
81 | ||
82 | #define __S000 PAGE_NONE | |
83 | #define __S001 PAGE_READONLY | |
84 | #define __S010 PAGE_SHARED | |
85 | #define __S011 PAGE_SHARED | |
86 | #define __S100 PAGE_READONLY | |
87 | #define __S101 PAGE_READONLY | |
88 | #define __S110 PAGE_SHARED | |
89 | #define __S111 PAGE_SHARED | |
90 | ||
91 | /* Use these fake page-protections on PMDs. */ | |
92 | #define SUN3_PMD_VALID (0x00000001) | |
93 | #define SUN3_PMD_MASK (0x0000003F) | |
94 | #define SUN3_PMD_MAGIC (0x0000002B) | |
95 | ||
96 | #ifndef __ASSEMBLY__ | |
97 | ||
98 | /* | |
99 | * Conversion functions: convert a page and protection to a page entry, | |
100 | * and a page entry and page directory to the page they refer to. | |
101 | */ | |
102 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
103 | ||
104 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
105 | { | |
106 | pte_val(pte) = (pte_val(pte) & SUN3_PAGE_CHG_MASK) | pgprot_val(newprot); | |
107 | return pte; | |
108 | } | |
109 | ||
110 | #define pmd_set(pmdp,ptep) do {} while (0) | |
111 | ||
112 | static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) | |
113 | { | |
114 | pgd_val(*pgdp) = virt_to_phys(pmdp); | |
115 | } | |
116 | ||
117 | #define __pte_page(pte) \ | |
118 | ((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) | |
119 | #define __pmd_page(pmd) \ | |
120 | ((unsigned long) __va (pmd_val (pmd) & PAGE_MASK)) | |
121 | ||
122 | static inline int pte_none (pte_t pte) { return !pte_val (pte); } | |
123 | static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; } | |
124 | static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
125 | { | |
126 | pte_val (*ptep) = 0; | |
127 | } | |
128 | ||
129 | #define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK) | |
130 | #define pfn_pte(pfn, pgprot) \ | |
131 | ({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; }) | |
132 | ||
12d810c1 RZ |
133 | #define pte_page(pte) virt_to_page(__pte_page(pte)) |
134 | #define pmd_page(pmd) virt_to_page(__pmd_page(pmd)) | |
1da177e4 LT |
135 | |
136 | ||
137 | static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); } | |
138 | #define pmd_none(pmd) pmd_none2(&(pmd)) | |
139 | //static inline int pmd_bad (pmd_t pmd) { return (pmd_val (pmd) & SUN3_PMD_MASK) != SUN3_PMD_MAGIC; } | |
140 | static inline int pmd_bad2 (pmd_t *pmd) { return 0; } | |
141 | #define pmd_bad(pmd) pmd_bad2(&(pmd)) | |
142 | static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; } | |
143 | /* #define pmd_present(pmd) pmd_present2(&(pmd)) */ | |
144 | #define pmd_present(pmd) (!pmd_none2(&(pmd))) | |
145 | static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } | |
146 | ||
147 | static inline int pgd_none (pgd_t pgd) { return 0; } | |
148 | static inline int pgd_bad (pgd_t pgd) { return 0; } | |
149 | static inline int pgd_present (pgd_t pgd) { return 1; } | |
150 | static inline void pgd_clear (pgd_t *pgdp) {} | |
151 | ||
152 | ||
153 | #define pte_ERROR(e) \ | |
154 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) | |
155 | #define pmd_ERROR(e) \ | |
156 | printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) | |
157 | #define pgd_ERROR(e) \ | |
158 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
159 | ||
160 | ||
161 | /* | |
162 | * The following only work if pte_present() is true. | |
163 | * Undefined behaviour if not... | |
164 | * [we have the full set here even if they don't change from m68k] | |
165 | */ | |
1da177e4 | 166 | static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } |
1da177e4 LT |
167 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; } |
168 | static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } | |
7e675137 | 169 | static inline int pte_special(pte_t pte) { return 0; } |
1da177e4 LT |
170 | |
171 | static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } | |
1da177e4 LT |
172 | static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; } |
173 | static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; } | |
174 | static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } | |
1da177e4 LT |
175 | static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; } |
176 | static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; } | |
177 | static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; } | |
178 | // use this version when caches work... | |
179 | //static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; } | |
180 | // until then, use: | |
181 | static inline pte_t pte_mkcache(pte_t pte) { return pte; } | |
7e675137 | 182 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } |
1da177e4 LT |
183 | |
184 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; | |
185 | extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; | |
186 | ||
187 | /* Find an entry in a pagetable directory. */ | |
188 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) | |
189 | ||
190 | #define pgd_offset(mm, address) \ | |
191 | ((mm)->pgd + pgd_index(address)) | |
192 | ||
193 | /* Find an entry in a kernel pagetable directory. */ | |
194 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
195 | ||
196 | /* Find an entry in the second-level pagetable. */ | |
197 | static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address) | |
198 | { | |
199 | return (pmd_t *) pgd; | |
200 | } | |
201 | ||
1da177e4 LT |
202 | /* Find an entry in the third-level pagetable. */ |
203 | #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) | |
204 | #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address)) | |
0eefed84 GU |
205 | #define pte_offset_map(pmd, address) ((pte_t *)page_address(pmd_page(*pmd)) + pte_index(address)) |
206 | #define pte_unmap(pte) do { } while (0) | |
1da177e4 LT |
207 | |
208 | /* Macros to (de)construct the fake PTEs representing swap pages. */ | |
209 | #define __swp_type(x) ((x).val & 0x7F) | |
210 | #define __swp_offset(x) (((x).val) >> 7) | |
211 | #define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) }) | |
212 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
213 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
214 | ||
215 | #endif /* !__ASSEMBLY__ */ | |
216 | #endif /* !_SUN3_PGTABLE_H */ |