1#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
 2#define _ASM_M32R_PGTABLE_2LEVEL_H
 3#ifdef __KERNEL__
 4
 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 */
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)
45
46/*
47 * (pmds are folded into pgds so this doesn't 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
53#define pgd_page_vaddr(pgd) \
54((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
55
56#ifndef CONFIG_DISCONTIGMEM
57#define pgd_page(pgd)	(mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
58#endif /* !CONFIG_DISCONTIGMEM */
59
60static 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
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 })
76
77#endif /* __KERNEL__ */
78#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */

 1#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
 2#define _ASM_M32R_PGTABLE_2LEVEL_H
 3#ifdef __KERNEL__
 4
 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 __PAGETABLE_PMD_FOLDED
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 */
34static inline int pgd_none(pgd_t pgd)	{ return 0; }
35static inline int pgd_bad(pgd_t pgd)	{ return 0; }
36static 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)
46
47/*
48 * (pmds are folded into pgds so this doesn't get actually called,
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
54#define pgd_page_vaddr(pgd) \
55((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
56
57#ifndef CONFIG_DISCONTIGMEM
58#define pgd_page(pgd)	(mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
59#endif /* !CONFIG_DISCONTIGMEM */
60
61static 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
74#endif /* __KERNEL__ */
75#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */