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Paul Mundte44d6c42010-01-13 19:18:39 +09001#ifndef __ASM_SH_PGTABLE_3LEVEL_H
2#define __ASM_SH_PGTABLE_3LEVEL_H
Matt Fleming5d9b4b12009-12-13 14:38:50 +00003
4#include <asm-generic/pgtable-nopud.h>
5
6/*
7 * Some cores need a 3-level page table layout, for example when using
8 * 64-bit PTEs and 4K pages.
9 */
Paul Mundt782bb5a2010-01-13 19:11:14 +090010#define PAGETABLE_LEVELS 3
Matt Fleming5d9b4b12009-12-13 14:38:50 +000011
Paul Mundt782bb5a2010-01-13 19:11:14 +090012#define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */
Matt Fleming5d9b4b12009-12-13 14:38:50 +000013
14/* PGD bits */
Paul Mundt782bb5a2010-01-13 19:11:14 +090015#define PGDIR_SHIFT 30
Matt Fleming5d9b4b12009-12-13 14:38:50 +000016
17#define PTRS_PER_PGD 4
18#define USER_PTRS_PER_PGD 2
19
20/* PMD bits */
Matt Fleming3f5ab762009-12-24 20:38:45 +000021#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
Matt Fleming5d9b4b12009-12-13 14:38:50 +000022#define PMD_SIZE (1UL << PMD_SHIFT)
23#define PMD_MASK (~(PMD_SIZE-1))
24
Matt Fleming3f5ab762009-12-24 20:38:45 +000025#define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE)
Matt Fleming5d9b4b12009-12-13 14:38:50 +000026
27#define pmd_ERROR(e) \
28 printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
29
30typedef struct { unsigned long long pmd; } pmd_t;
31#define pmd_val(x) ((x).pmd)
32#define __pmd(x) ((pmd_t) { (x) } )
33
34static inline unsigned long pud_page_vaddr(pud_t pud)
35{
36 return pud_val(pud);
37}
38
39#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
40static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
41{
42 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
43}
44
45#define pud_none(x) (!pud_val(x))
46#define pud_present(x) (pud_val(x))
47#define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0)
48#define pud_bad(x) (pud_val(x) & ~PAGE_MASK)
49
50/*
51 * (puds are folded into pgds so this doesn't get actually called,
52 * but the define is needed for a generic inline function.)
53 */
54#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
55
Paul Mundte44d6c42010-01-13 19:18:39 +090056#endif /* __ASM_SH_PGTABLE_3LEVEL_H */