projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_M32R_PGTABLE_2LEVEL_H |
| 2 | #define _ASM_M32R_PGTABLE_2LEVEL_H | |
| 3 | ||
| 4 | #ifdef __KERNEL__ | |
| 5 | ||
| 1da177e4 LT |
6 | |
| 7 | /* | |
| 8 | * traditional M32R two-level paging structure: | |
| 9 | */ | |
| 10 | ||
| 11 | #define PGDIR_SHIFT 22 | |
| 12 | #define PTRS_PER_PGD 1024 | |
| 13 | ||
| 14 | /* | |
| 15 | * the M32R is two-level, so we don't really have any | |
| 16 | * PMD directory physically. | |
| 17 | */ | |
| 18 | #define PMD_SHIFT 22 | |
| 19 | #define PTRS_PER_PMD 1 | |
| 20 | ||
| 21 | #define PTRS_PER_PTE 1024 | |
| 22 | ||
| 23 | #define pte_ERROR(e) \ | |
| 24 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) | |
| 25 | #define pmd_ERROR(e) \ | |
| 26 | printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) | |
| 27 | #define pgd_ERROR(e) \ | |
| 28 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
| 29 | ||
| 30 | /* | |
| 31 | * The "pgd_xxx()" functions here are trivial for a folded two-level | |
| 32 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | |
| 33 | * into the pgd entry) | |
| 34 | */ | |
| 35 | static inline int pgd_none(pgd_t pgd) { return 0; } | |
| 36 | static inline int pgd_bad(pgd_t pgd) { return 0; } | |
| 37 | static inline int pgd_present(pgd_t pgd) { return 1; } | |
| 38 | #define pgd_clear(xp) do { } while (0) | |
| 39 | ||
| 40 | /* | |
| 41 | * Certain architectures need to do special things when PTEs | |
| 42 | * within a page table are directly modified. Thus, the following | |
| 43 | * hook is made available. | |
| 44 | */ | |
| 45 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
| 46 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
| a93cb055 | 47 | |
| 1da177e4 LT |
48 | /* |
| 49 | * (pmds are folded into pgds so this doesnt get actually called, | |
| 50 | * but the define is needed for a generic inline function.) | |
| 51 | */ | |
| 52 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) | |
| 53 | #define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) | |
| 54 | ||
| 46a82b2d | 55 | #define pgd_page_vaddr(pgd) \ |
| 1da177e4 LT |
56 | ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) |
| 57 | ||
| 46a82b2d DM |
58 | #ifndef CONFIG_DISCONTIGMEM |
| 59 | #define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE)) | |
| 60 | #endif /* !CONFIG_DISCONTIGMEM */ | |
| 61 | ||
| 1da177e4 LT |
62 | static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address) |
| 63 | { | |
| 64 | return (pmd_t *) dir; | |
| 65 | } | |
| 66 | ||
| 67 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) | |
| 68 | #define pte_same(a, b) (pte_val(a) == pte_val(b)) | |
| 69 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
| 70 | #define pte_none(x) (!pte_val(x)) | |
| 71 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) | |
| 72 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
| 73 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
| 74 | ||
| 75 | #define PTE_FILE_MAX_BITS 29 | |
| 76 | #define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0xef) | (((pte_val(pte) >> 10)) << 7)) | |
| 77 | #define pgoff_to_pte(off) ((pte_t) { (((off) & 0xef) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) | |
| 78 | ||
| 79 | #endif /* __KERNEL__ */ | |
| 80 | ||
| 81 | #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */ |