Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | #define PTE_FILE_MAX_BITS 28 |
| 42 | |
| 43 | /* Compound page protection values. */ |
| 44 | //todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix... |
| 45 | // is it just PAGE_KERNEL and PAGE_SHARED? |
| 46 | #define PAGE_NONE __pgprot(SUN3_PAGE_VALID \ |
| 47 | | SUN3_PAGE_ACCESSED \ |
| 48 | | SUN3_PAGE_NOCACHE) |
| 49 | #define PAGE_SHARED __pgprot(SUN3_PAGE_VALID \ |
| 50 | | SUN3_PAGE_WRITEABLE \ |
| 51 | | SUN3_PAGE_ACCESSED \ |
| 52 | | SUN3_PAGE_NOCACHE) |
| 53 | #define PAGE_COPY __pgprot(SUN3_PAGE_VALID \ |
| 54 | | SUN3_PAGE_ACCESSED \ |
| 55 | | SUN3_PAGE_NOCACHE) |
| 56 | #define PAGE_READONLY __pgprot(SUN3_PAGE_VALID \ |
| 57 | | SUN3_PAGE_ACCESSED \ |
| 58 | | SUN3_PAGE_NOCACHE) |
| 59 | #define PAGE_KERNEL __pgprot(SUN3_PAGE_VALID \ |
| 60 | | SUN3_PAGE_WRITEABLE \ |
| 61 | | SUN3_PAGE_SYSTEM \ |
| 62 | | SUN3_PAGE_NOCACHE \ |
| 63 | | SUN3_PAGE_ACCESSED \ |
| 64 | | SUN3_PAGE_MODIFIED) |
| 65 | #define PAGE_INIT __pgprot(SUN3_PAGE_VALID \ |
| 66 | | SUN3_PAGE_WRITEABLE \ |
| 67 | | SUN3_PAGE_SYSTEM \ |
| 68 | | SUN3_PAGE_NOCACHE) |
| 69 | |
| 70 | /* |
| 71 | * Page protections for initialising protection_map. The sun3 has only two |
| 72 | * protection settings, valid (implying read and execute) and writeable. These |
| 73 | * are as close as we can get... |
| 74 | */ |
| 75 | #define __P000 PAGE_NONE |
| 76 | #define __P001 PAGE_READONLY |
| 77 | #define __P010 PAGE_COPY |
| 78 | #define __P011 PAGE_COPY |
| 79 | #define __P100 PAGE_READONLY |
| 80 | #define __P101 PAGE_READONLY |
| 81 | #define __P110 PAGE_COPY |
| 82 | #define __P111 PAGE_COPY |
| 83 | |
| 84 | #define __S000 PAGE_NONE |
| 85 | #define __S001 PAGE_READONLY |
| 86 | #define __S010 PAGE_SHARED |
| 87 | #define __S011 PAGE_SHARED |
| 88 | #define __S100 PAGE_READONLY |
| 89 | #define __S101 PAGE_READONLY |
| 90 | #define __S110 PAGE_SHARED |
| 91 | #define __S111 PAGE_SHARED |
| 92 | |
| 93 | /* Use these fake page-protections on PMDs. */ |
| 94 | #define SUN3_PMD_VALID (0x00000001) |
| 95 | #define SUN3_PMD_MASK (0x0000003F) |
| 96 | #define SUN3_PMD_MAGIC (0x0000002B) |
| 97 | |
| 98 | #ifndef __ASSEMBLY__ |
| 99 | |
| 100 | /* |
| 101 | * Conversion functions: convert a page and protection to a page entry, |
| 102 | * and a page entry and page directory to the page they refer to. |
| 103 | */ |
| 104 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 105 | |
| 106 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 107 | { |
| 108 | pte_val(pte) = (pte_val(pte) & SUN3_PAGE_CHG_MASK) | pgprot_val(newprot); |
| 109 | return pte; |
| 110 | } |
| 111 | |
| 112 | #define pmd_set(pmdp,ptep) do {} while (0) |
| 113 | |
| 114 | static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) |
| 115 | { |
| 116 | pgd_val(*pgdp) = virt_to_phys(pmdp); |
| 117 | } |
| 118 | |
| 119 | #define __pte_page(pte) \ |
| 120 | ((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) |
| 121 | #define __pmd_page(pmd) \ |
| 122 | ((unsigned long) __va (pmd_val (pmd) & PAGE_MASK)) |
| 123 | |
| 124 | static inline int pte_none (pte_t pte) { return !pte_val (pte); } |
| 125 | static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; } |
| 126 | static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| 127 | { |
| 128 | pte_val (*ptep) = 0; |
| 129 | } |
| 130 | |
| 131 | #define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK) |
| 132 | #define pfn_pte(pfn, pgprot) \ |
| 133 | ({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; }) |
| 134 | |
Roman Zippel | 12d810c | 2007-05-31 00:40:54 -0700 | [diff] [blame] | 135 | #define pte_page(pte) virt_to_page(__pte_page(pte)) |
| 136 | #define pmd_page(pmd) virt_to_page(__pmd_page(pmd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | |
| 139 | static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); } |
| 140 | #define pmd_none(pmd) pmd_none2(&(pmd)) |
| 141 | //static inline int pmd_bad (pmd_t pmd) { return (pmd_val (pmd) & SUN3_PMD_MASK) != SUN3_PMD_MAGIC; } |
| 142 | static inline int pmd_bad2 (pmd_t *pmd) { return 0; } |
| 143 | #define pmd_bad(pmd) pmd_bad2(&(pmd)) |
| 144 | static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; } |
| 145 | /* #define pmd_present(pmd) pmd_present2(&(pmd)) */ |
| 146 | #define pmd_present(pmd) (!pmd_none2(&(pmd))) |
| 147 | static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } |
| 148 | |
| 149 | static inline int pgd_none (pgd_t pgd) { return 0; } |
| 150 | static inline int pgd_bad (pgd_t pgd) { return 0; } |
| 151 | static inline int pgd_present (pgd_t pgd) { return 1; } |
| 152 | static inline void pgd_clear (pgd_t *pgdp) {} |
| 153 | |
| 154 | |
| 155 | #define pte_ERROR(e) \ |
| 156 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) |
| 157 | #define pmd_ERROR(e) \ |
| 158 | printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) |
| 159 | #define pgd_ERROR(e) \ |
| 160 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) |
| 161 | |
| 162 | |
| 163 | /* |
| 164 | * The following only work if pte_present() is true. |
| 165 | * Undefined behaviour if not... |
| 166 | * [we have the full set here even if they don't change from m68k] |
| 167 | */ |
| 168 | static inline int pte_read(pte_t pte) { return 1; } |
| 169 | static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } |
| 170 | static inline int pte_exec(pte_t pte) { return 1; } |
| 171 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; } |
| 172 | static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } |
| 173 | static inline int pte_file(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } |
| 174 | |
| 175 | static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } |
| 176 | static inline pte_t pte_rdprotect(pte_t pte) { return pte; } |
| 177 | static inline pte_t pte_exprotect(pte_t pte) { return pte; } |
| 178 | static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; } |
| 179 | static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; } |
| 180 | static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } |
| 181 | static inline pte_t pte_mkread(pte_t pte) { return pte; } |
| 182 | static inline pte_t pte_mkexec(pte_t pte) { return pte; } |
| 183 | static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; } |
| 184 | static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; } |
| 185 | static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; } |
| 186 | // use this version when caches work... |
| 187 | //static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; } |
| 188 | // until then, use: |
| 189 | static inline pte_t pte_mkcache(pte_t pte) { return pte; } |
| 190 | |
| 191 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
| 192 | extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; |
| 193 | |
| 194 | /* Find an entry in a pagetable directory. */ |
| 195 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) |
| 196 | |
| 197 | #define pgd_offset(mm, address) \ |
| 198 | ((mm)->pgd + pgd_index(address)) |
| 199 | |
| 200 | /* Find an entry in a kernel pagetable directory. */ |
| 201 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) |
| 202 | |
| 203 | /* Find an entry in the second-level pagetable. */ |
| 204 | static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address) |
| 205 | { |
| 206 | return (pmd_t *) pgd; |
| 207 | } |
| 208 | |
| 209 | static inline unsigned long pte_to_pgoff(pte_t pte) |
| 210 | { |
| 211 | return pte.pte & SUN3_PAGE_PGNUM_MASK; |
| 212 | } |
| 213 | |
Al Viro | 0efb713 | 2006-01-12 01:06:20 -0800 | [diff] [blame] | 214 | static inline pte_t pgoff_to_pte(unsigned off) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
| 216 | pte_t pte = { off + SUN3_PAGE_ACCESSED }; |
| 217 | return pte; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | /* Find an entry in the third-level pagetable. */ |
| 222 | #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) |
| 223 | #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address)) |
| 224 | /* FIXME: should we bother with kmap() here? */ |
| 225 | #define pte_offset_map(pmd, address) ((pte_t *)kmap(pmd_page(*pmd)) + pte_index(address)) |
| 226 | #define pte_offset_map_nested(pmd, address) pte_offset_map(pmd, address) |
| 227 | #define pte_unmap(pte) kunmap(pte) |
| 228 | #define pte_unmap_nested(pte) kunmap(pte) |
| 229 | |
| 230 | /* Macros to (de)construct the fake PTEs representing swap pages. */ |
| 231 | #define __swp_type(x) ((x).val & 0x7F) |
| 232 | #define __swp_offset(x) (((x).val) >> 7) |
| 233 | #define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) }) |
| 234 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| 235 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| 236 | |
| 237 | #endif /* !__ASSEMBLY__ */ |
| 238 | #endif /* !_SUN3_PGTABLE_H */ |