1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology
4 */
5 #ifndef _ASM_PGTABLE_BITS_H
6 #define _ASM_PGTABLE_BITS_H
7
8 /* Page table bits */
9 #define _PAGE_VALID_SHIFT 0
10 #define _PAGE_ACCESSED_SHIFT 0 /* Reuse Va
11 #define _PAGE_DIRTY_SHIFT 1
12 #define _PAGE_PLV_SHIFT 2 /* 2~3, two
13 #define _CACHE_SHIFT 4 /* 4~5, two
14 #define _PAGE_GLOBAL_SHIFT 6
15 #define _PAGE_HUGE_SHIFT 6 /* HUGE is
16 #define _PAGE_PRESENT_SHIFT 7
17 #define _PAGE_WRITE_SHIFT 8
18 #define _PAGE_MODIFIED_SHIFT 9
19 #define _PAGE_PROTNONE_SHIFT 10
20 #define _PAGE_SPECIAL_SHIFT 11
21 #define _PAGE_HGLOBAL_SHIFT 12 /* HGlobal
22 #define _PAGE_PFN_SHIFT 12
23 #define _PAGE_SWP_EXCLUSIVE_SHIFT 23
24 #define _PAGE_PFN_END_SHIFT 48
25 #define _PAGE_DEVMAP_SHIFT 59
26 #define _PAGE_PRESENT_INVALID_SHIFT 60
27 #define _PAGE_NO_READ_SHIFT 61
28 #define _PAGE_NO_EXEC_SHIFT 62
29 #define _PAGE_RPLV_SHIFT 63
30
31 /* Used by software */
32 #define _PAGE_PRESENT (_ULCAST_(1) <
33 #define _PAGE_PRESENT_INVALID (_ULCAST_(1) <
34 #define _PAGE_WRITE (_ULCAST_(1) <
35 #define _PAGE_ACCESSED (_ULCAST_(1) <
36 #define _PAGE_MODIFIED (_ULCAST_(1) <
37 #define _PAGE_PROTNONE (_ULCAST_(1) <
38 #define _PAGE_SPECIAL (_ULCAST_(1) <
39 #define _PAGE_DEVMAP (_ULCAST_(1) <
40
41 /* We borrow bit 23 to store the exclusive mar
42 #define _PAGE_SWP_EXCLUSIVE (_ULCAST_(1) <
43
44 /* Used by TLB hardware (placed in EntryLo*) *
45 #define _PAGE_VALID (_ULCAST_(1) <
46 #define _PAGE_DIRTY (_ULCAST_(1) <
47 #define _PAGE_PLV (_ULCAST_(3) <
48 #define _PAGE_GLOBAL (_ULCAST_(1) <
49 #define _PAGE_HUGE (_ULCAST_(1) <
50 #define _PAGE_HGLOBAL (_ULCAST_(1) <
51 #define _PAGE_NO_READ (_ULCAST_(1) <
52 #define _PAGE_NO_EXEC (_ULCAST_(1) <
53 #define _PAGE_RPLV (_ULCAST_(1) <
54 #define _CACHE_MASK (_ULCAST_(3) <
55 #define PFN_PTE_SHIFT (PAGE_SHIFT -
56
57 #define _PAGE_USER (PLV_USER << _PAGE_PLV
58 #define _PAGE_KERN (PLV_KERN << _PAGE_PLV
59
60 #define _PFN_MASK (~((_ULCAST_(1) << (PFN_PTE_
61 ((_ULCAST_(1) << (_PAGE_PFN_
62
63 /*
64 * Cache attributes
65 */
66 #ifndef _CACHE_SUC
67 #define _CACHE_SUC (0<<_C
68 #endif
69 #ifndef _CACHE_CC
70 #define _CACHE_CC (1<<_C
71 #endif
72 #ifndef _CACHE_WUC
73 #define _CACHE_WUC (2<<_C
74 #endif
75
76 #define __READABLE (_PAGE_VALID)
77 #define __WRITEABLE (_PAGE_DIRTY | _PAGE_W
78
79 #define _PAGE_CHG_MASK (_PAGE_MODIFIED | _PAG
80 #define _HPAGE_CHG_MASK (_PAGE_MODIFIED | _PAG
81
82 #define PAGE_NONE __pgprot(_PAGE_PROTNON
83 _PAGE_USER |
84 #define PAGE_SHARED __pgprot(_PAGE_PRESENT
85 _PAGE_USER |
86 #define PAGE_READONLY __pgprot(_PAGE_PRESENT
87
88 #define PAGE_KERNEL __pgprot(_PAGE_PRESENT
89 _PAGE_GLOBAL
90 #define PAGE_KERNEL_SUC __pgprot(_PAGE_PRESENT
91 _PAGE_GLOBAL
92 #define PAGE_KERNEL_WUC __pgprot(_PAGE_PRESENT
93 _PAGE_GLOBAL
94
95 #ifndef __ASSEMBLY__
96
97 #define _PAGE_IOREMAP pgprot_val(PAG
98
99 #define pgprot_noncached pgprot_noncached
100
101 static inline pgprot_t pgprot_noncached(pgprot
102 {
103 unsigned long prot = pgprot_val(_prot)
104
105 prot = (prot & ~_CACHE_MASK) | _CACHE_
106
107 return __pgprot(prot);
108 }
109
110 extern bool wc_enabled;
111
112 #define pgprot_writecombine pgprot_writecombin
113
114 static inline pgprot_t pgprot_writecombine(pgp
115 {
116 unsigned long prot = pgprot_val(_prot)
117
118 prot = (prot & ~_CACHE_MASK) | (wc_ena
119
120 return __pgprot(prot);
121 }
122
123 #endif /* !__ASSEMBLY__ */
124
125 #endif /* _ASM_PGTABLE_BITS_H */
126
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