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 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; }) 132 133 #define pte_page(pte) virt_to_page(__pte_page(pte)) 134 #define pmd_page(pmd) virt_to_page(__pmd_page(pmd)) 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 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 155 #define pmd_ERROR(e) \ 156 pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) 157 #define pgd_ERROR(e) \ 158 pr_err("%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 */ 166 static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } 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; } 169 static inline int pte_special(pte_t pte) { return 0; } 170 171 static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } 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; } 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; } 182 static inline pte_t pte_mkspecial(pte_t pte) { return pte; } 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 } 201 202 /* 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)) 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) 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 */ 217