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1da177e4 LT |
1 | #ifndef _ASM_M32R_PGTABLE_2LEVEL_H |
2 | #define _ASM_M32R_PGTABLE_2LEVEL_H | |
1da177e4 LT |
3 | #ifdef __KERNEL__ |
4 | ||
1da177e4 LT |
5 | /* |
6 | * traditional M32R two-level paging structure: | |
7 | */ | |
8 | ||
9 | #define PGDIR_SHIFT 22 | |
10 | #define PTRS_PER_PGD 1024 | |
11 | ||
12 | /* | |
13 | * the M32R is two-level, so we don't really have any | |
14 | * PMD directory physically. | |
15 | */ | |
16 | #define PMD_SHIFT 22 | |
17 | #define PTRS_PER_PMD 1 | |
18 | ||
19 | #define PTRS_PER_PTE 1024 | |
20 | ||
21 | #define pte_ERROR(e) \ | |
22 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) | |
23 | #define pmd_ERROR(e) \ | |
24 | printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) | |
25 | #define pgd_ERROR(e) \ | |
26 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
27 | ||
28 | /* | |
29 | * The "pgd_xxx()" functions here are trivial for a folded two-level | |
30 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | |
31 | * into the pgd entry) | |
32 | */ | |
33 | static inline int pgd_none(pgd_t pgd) { return 0; } | |
34 | static inline int pgd_bad(pgd_t pgd) { return 0; } | |
35 | static inline int pgd_present(pgd_t pgd) { return 1; } | |
36 | #define pgd_clear(xp) do { } while (0) | |
37 | ||
38 | /* | |
39 | * Certain architectures need to do special things when PTEs | |
40 | * within a page table are directly modified. Thus, the following | |
41 | * hook is made available. | |
42 | */ | |
43 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
44 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
a93cb055 | 45 | |
1da177e4 LT |
46 | /* |
47 | * (pmds are folded into pgds so this doesnt get actually called, | |
48 | * but the define is needed for a generic inline function.) | |
49 | */ | |
50 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) | |
51 | #define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) | |
52 | ||
46a82b2d | 53 | #define pgd_page_vaddr(pgd) \ |
1da177e4 LT |
54 | ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) |
55 | ||
46a82b2d DM |
56 | #ifndef CONFIG_DISCONTIGMEM |
57 | #define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE)) | |
58 | #endif /* !CONFIG_DISCONTIGMEM */ | |
59 | ||
1da177e4 LT |
60 | static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address) |
61 | { | |
62 | return (pmd_t *) dir; | |
63 | } | |
64 | ||
65 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) | |
66 | #define pte_same(a, b) (pte_val(a) == pte_val(b)) | |
67 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
68 | #define pte_none(x) (!pte_val(x)) | |
69 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) | |
70 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
71 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
72 | ||
73 | #define PTE_FILE_MAX_BITS 29 | |
23c9bbba HT |
74 | #define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0x7f) | (((pte_val(pte) >> 10)) << 7)) |
75 | #define pgoff_to_pte(off) ((pte_t) { (((off) & 0x7f) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) | |
1da177e4 LT |
76 | |
77 | #endif /* __KERNEL__ */ | |
1da177e4 | 78 | #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */ |