1 #ifndef _ASM_M32R_PGTABLE_2LEVEL_H
2 #define _ASM_M32R_PGTABLE_2LEVEL_H
8 * traditional M32R two-level paging structure:
11 #define PGDIR_SHIFT 22
12 #define PTRS_PER_PGD 1024
15 * the M32R is two-level, so we don't really have any
16 * PMD directory physically.
19 #define PTRS_PER_PMD 1
21 #define PTRS_PER_PTE 1024
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))
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
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)
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.
45 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
46 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
47 #define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval)
49 * (pmds are folded into pgds so this doesnt get actually called,
50 * but the define is needed for a generic inline function.)
52 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
53 #define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval)
55 #define pgd_page_vaddr(pgd) \
56 ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
58 #ifndef CONFIG_DISCONTIGMEM
59 #define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
60 #endif /* !CONFIG_DISCONTIGMEM */
62 static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address)
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))
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 })
79 #endif /* __KERNEL__ */
81 #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */