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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 | */ | |
c07af4f1 | 16 | #define __PAGETABLE_PMD_FOLDED |
1da177e4 LT |
17 | #define PMD_SHIFT 22 |
18 | #define PTRS_PER_PMD 1 | |
19 | ||
20 | #define PTRS_PER_PTE 1024 | |
21 | ||
22 | #define pte_ERROR(e) \ | |
23 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) | |
24 | #define pmd_ERROR(e) \ | |
25 | printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) | |
26 | #define pgd_ERROR(e) \ | |
27 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
28 | ||
29 | /* | |
30 | * The "pgd_xxx()" functions here are trivial for a folded two-level | |
31 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | |
32 | * into the pgd entry) | |
33 | */ | |
34 | static inline int pgd_none(pgd_t pgd) { return 0; } | |
35 | static inline int pgd_bad(pgd_t pgd) { return 0; } | |
36 | static inline int pgd_present(pgd_t pgd) { return 1; } | |
37 | #define pgd_clear(xp) do { } while (0) | |
38 | ||
39 | /* | |
40 | * Certain architectures need to do special things when PTEs | |
41 | * within a page table are directly modified. Thus, the following | |
42 | * hook is made available. | |
43 | */ | |
44 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
45 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
a93cb055 | 46 | |
1da177e4 | 47 | /* |
25985edc | 48 | * (pmds are folded into pgds so this doesn't get actually called, |
1da177e4 LT |
49 | * but the define is needed for a generic inline function.) |
50 | */ | |
51 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) | |
52 | #define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) | |
53 | ||
46a82b2d | 54 | #define pgd_page_vaddr(pgd) \ |
1da177e4 LT |
55 | ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) |
56 | ||
46a82b2d DM |
57 | #ifndef CONFIG_DISCONTIGMEM |
58 | #define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE)) | |
59 | #endif /* !CONFIG_DISCONTIGMEM */ | |
60 | ||
1da177e4 LT |
61 | static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address) |
62 | { | |
63 | return (pmd_t *) dir; | |
64 | } | |
65 | ||
66 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) | |
67 | #define pte_same(a, b) (pte_val(a) == pte_val(b)) | |
68 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
69 | #define pte_none(x) (!pte_val(x)) | |
70 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) | |
71 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
72 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
73 | ||
1da177e4 | 74 | #endif /* __KERNEL__ */ |
1da177e4 | 75 | #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */ |