blob: bca3475f9595753aa43672791a17a177579831e9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
2#define _ASM_M32R_PGTABLE_2LEVEL_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#ifdef __KERNEL__
4
Linus Torvalds1da177e2005-04-16 15:20:36 -07005/*
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 */
33static inline int pgd_none(pgd_t pgd) { return 0; }
34static inline int pgd_bad(pgd_t pgd) { return 0; }
35static 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)
Zachary Amsdena93cb052006-09-30 23:29:37 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046/*
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
Dave McCracken46a82b22006-09-25 23:31:48 -070053#define pgd_page_vaddr(pgd) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070054((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
55
Dave McCracken46a82b22006-09-25 23:31:48 -070056#ifndef CONFIG_DISCONTIGMEM
57#define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
58#endif /* !CONFIG_DISCONTIGMEM */
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static 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
Hirokazu Takata23c9bbb2007-05-10 22:22:28 -070074#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 })
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */