1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_PGTABLE_3LEVEL_H
3 #define __ASM_SH_PGTABLE_3LEVEL_H
4
5 #define __ARCH_USE_5LEVEL_HACK
6 #include <asm-generic/pgtable-nopud.h>
7
8 /*
9 * Some cores need a 3-level page table layout, for example when using
10 * 64-bit PTEs and 4K pages.
11 */
12 #define PAGETABLE_LEVELS 3
13
14 #define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */
15
16 /* PGD bits */
17 #define PGDIR_SHIFT 30
18
19 #define PTRS_PER_PGD 4
20 #define USER_PTRS_PER_PGD 2
21
22 /* PMD bits */
23 #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
24 #define PMD_SIZE (1UL << PMD_SHIFT)
25 #define PMD_MASK (~(PMD_SIZE-1))
26
27 #define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE)
28
29 #define pmd_ERROR(e) \
30 printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
31
32 typedef struct { unsigned long long pmd; } pmd_t;
33 #define pmd_val(x) ((x).pmd)
34 #define __pmd(x) ((pmd_t) { (x) } )
35
pud_page_vaddr(pud_t pud)36 static inline unsigned long pud_page_vaddr(pud_t pud)
37 {
38 return pud_val(pud);
39 }
40
41 /* only used by the stubbed out hugetlb gup code, should never be called */
42 #define pud_page(pud) NULL
43
44 #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
pmd_offset(pud_t * pud,unsigned long address)45 static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
46 {
47 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
48 }
49
50 #define pud_none(x) (!pud_val(x))
51 #define pud_present(x) (pud_val(x))
52 #define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0)
53 #define pud_bad(x) (pud_val(x) & ~PAGE_MASK)
54
55 /*
56 * (puds are folded into pgds so this doesn't get actually called,
57 * but the define is needed for a generic inline function.)
58 */
59 #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
60
61 #endif /* __ASM_SH_PGTABLE_3LEVEL_H */
62