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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
047ea784 PM |
2 | #ifndef _ASM_POWERPC_PGTABLE_H |
3 | #define _ASM_POWERPC_PGTABLE_H | |
4 | ||
9c709f3b | 5 | #ifndef __ASSEMBLY__ |
c34a51ce | 6 | #include <linux/mmdebug.h> |
1c98025c | 7 | #include <linux/mmzone.h> |
9c709f3b DG |
8 | #include <asm/processor.h> /* For TASK_SIZE */ |
9 | #include <asm/mmu.h> | |
10 | #include <asm/page.h> | |
bd5050e3 | 11 | #include <asm/tlbflush.h> |
8d30c14c | 12 | |
9c709f3b | 13 | struct mm_struct; |
8d30c14c | 14 | |
9c709f3b DG |
15 | #endif /* !__ASSEMBLY__ */ |
16 | ||
3dfcb315 AK |
17 | #ifdef CONFIG_PPC_BOOK3S |
18 | #include <asm/book3s/pgtable.h> | |
19 | #else | |
17ed9e31 | 20 | #include <asm/nohash/pgtable.h> |
3dfcb315 | 21 | #endif /* !CONFIG_PPC_BOOK3S */ |
1da177e4 | 22 | |
f4805785 CL |
23 | /* Note due to the way vm flags are laid out, the bits are XWR */ |
24 | #define __P000 PAGE_NONE | |
25 | #define __P001 PAGE_READONLY | |
26 | #define __P010 PAGE_COPY | |
27 | #define __P011 PAGE_COPY | |
28 | #define __P100 PAGE_READONLY_X | |
29 | #define __P101 PAGE_READONLY_X | |
30 | #define __P110 PAGE_COPY_X | |
31 | #define __P111 PAGE_COPY_X | |
32 | ||
33 | #define __S000 PAGE_NONE | |
34 | #define __S001 PAGE_READONLY | |
35 | #define __S010 PAGE_SHARED | |
36 | #define __S011 PAGE_SHARED | |
37 | #define __S100 PAGE_READONLY_X | |
38 | #define __S101 PAGE_READONLY_X | |
39 | #define __S110 PAGE_SHARED_X | |
40 | #define __S111 PAGE_SHARED_X | |
41 | ||
1da177e4 | 42 | #ifndef __ASSEMBLY__ |
64b3d0e8 | 43 | |
0b1c524c CL |
44 | #ifdef CONFIG_PPC32 |
45 | static inline pmd_t *pmd_ptr(struct mm_struct *mm, unsigned long va) | |
46 | { | |
2fb47060 | 47 | return pmd_offset(pud_offset(p4d_offset(pgd_offset(mm, va), va), va), va); |
0b1c524c CL |
48 | } |
49 | ||
50 | static inline pmd_t *pmd_ptr_k(unsigned long va) | |
51 | { | |
2fb47060 | 52 | return pmd_offset(pud_offset(p4d_offset(pgd_offset_k(va), va), va), va); |
0b1c524c | 53 | } |
2efc7c08 CL |
54 | |
55 | static inline pte_t *virt_to_kpte(unsigned long vaddr) | |
56 | { | |
cc6f0e39 CL |
57 | pmd_t *pmd = pmd_ptr_k(vaddr); |
58 | ||
59 | return pmd_none(*pmd) ? NULL : pte_offset_kernel(pmd, vaddr); | |
2efc7c08 | 60 | } |
0b1c524c CL |
61 | #endif |
62 | ||
78f1dbde AK |
63 | #include <asm/tlbflush.h> |
64 | ||
71087002 BH |
65 | /* Keep these as a macros to avoid include dependency mess */ |
66 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
67 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
b9fb4480 AK |
68 | /* |
69 | * Select all bits except the pfn | |
70 | */ | |
71 | static inline pgprot_t pte_pgprot(pte_t pte) | |
72 | { | |
73 | unsigned long pte_flags; | |
74 | ||
75 | pte_flags = pte_val(pte) & ~PTE_RPN_MASK; | |
76 | return __pgprot(pte_flags); | |
77 | } | |
71087002 | 78 | |
9c709f3b DG |
79 | /* |
80 | * ZERO_PAGE is a global shared page that is always zero: used | |
81 | * for zero-mapped memory areas etc.. | |
82 | */ | |
83 | extern unsigned long empty_zero_page[]; | |
84 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) | |
85 | ||
86 | extern pgd_t swapper_pg_dir[]; | |
87 | ||
88 | extern void paging_init(void); | |
89 | ||
7cd9b317 CL |
90 | extern unsigned long ioremap_bot; |
91 | ||
9c709f3b DG |
92 | /* |
93 | * kern_addr_valid is intended to indicate whether an address is a valid | |
94 | * kernel address. Most 32-bit archs define it as always true (like this) | |
95 | * but most 64-bit archs actually perform a test. What should we do here? | |
96 | */ | |
97 | #define kern_addr_valid(addr) (1) | |
98 | ||
1da177e4 | 99 | #include <asm-generic/pgtable.h> |
1e3519f8 | 100 | |
074c2eae AK |
101 | #ifndef CONFIG_TRANSPARENT_HUGEPAGE |
102 | #define pmd_large(pmd) 0 | |
074c2eae | 103 | #endif |
e9ab1a1c | 104 | |
94171b19 | 105 | /* can we use this in kvm */ |
e9ab1a1c AK |
106 | unsigned long vmalloc_to_phys(void *vmalloc_addr); |
107 | ||
1e03c7e2 | 108 | void pgtable_cache_add(unsigned int shift); |
029d9252 | 109 | |
34536d78 CL |
110 | pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); |
111 | ||
3184cc4b | 112 | #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) |
029d9252 ME |
113 | void mark_initmem_nx(void); |
114 | #else | |
115 | static inline void mark_initmem_nx(void) { } | |
116 | #endif | |
117 | ||
a74791dd CL |
118 | /* |
119 | * When used, PTE_FRAG_NR is defined in subarch pgtable.h | |
120 | * so we are sure it is included when arriving here. | |
121 | */ | |
122 | #ifdef PTE_FRAG_NR | |
123 | static inline void *pte_frag_get(mm_context_t *ctx) | |
124 | { | |
125 | return ctx->pte_frag; | |
126 | } | |
127 | ||
128 | static inline void pte_frag_set(mm_context_t *ctx, void *p) | |
129 | { | |
130 | ctx->pte_frag = p; | |
131 | } | |
132 | #else | |
32ea4c14 CL |
133 | #define PTE_FRAG_NR 1 |
134 | #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT | |
135 | #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) | |
136 | ||
a74791dd CL |
137 | static inline void *pte_frag_get(mm_context_t *ctx) |
138 | { | |
139 | return NULL; | |
140 | } | |
141 | ||
142 | static inline void pte_frag_set(mm_context_t *ctx, void *p) | |
143 | { | |
144 | } | |
145 | #endif | |
146 | ||
d6eacedd AK |
147 | #ifndef pmd_is_leaf |
148 | #define pmd_is_leaf pmd_is_leaf | |
149 | static inline bool pmd_is_leaf(pmd_t pmd) | |
150 | { | |
151 | return false; | |
152 | } | |
153 | #endif | |
154 | ||
155 | #ifndef pud_is_leaf | |
156 | #define pud_is_leaf pud_is_leaf | |
157 | static inline bool pud_is_leaf(pud_t pud) | |
158 | { | |
159 | return false; | |
160 | } | |
161 | #endif | |
162 | ||
2fb47060 MR |
163 | #ifndef p4d_is_leaf |
164 | #define p4d_is_leaf p4d_is_leaf | |
165 | static inline bool p4d_is_leaf(p4d_t p4d) | |
d6eacedd AK |
166 | { |
167 | return false; | |
168 | } | |
169 | #endif | |
170 | ||
9bd3bb67 AK |
171 | #ifdef CONFIG_PPC64 |
172 | #define is_ioremap_addr is_ioremap_addr | |
173 | static inline bool is_ioremap_addr(const void *x) | |
174 | { | |
9bd3bb67 AK |
175 | unsigned long addr = (unsigned long)x; |
176 | ||
177 | return addr >= IOREMAP_BASE && addr < IOREMAP_END; | |
9bd3bb67 AK |
178 | } |
179 | #endif /* CONFIG_PPC64 */ | |
180 | ||
1da177e4 LT |
181 | #endif /* __ASSEMBLY__ */ |
182 | ||
047ea784 | 183 | #endif /* _ASM_POWERPC_PGTABLE_H */ |