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