Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_PGTABLE_H
3#define _ASM_POWERPC_PGTABLE_H
4
5#ifndef __ASSEMBLY__
6#include <linux/mmdebug.h>
7#include <linux/mmzone.h>
8#include <asm/processor.h> /* For TASK_SIZE */
9#include <asm/mmu.h>
10#include <asm/page.h>
11#include <asm/tlbflush.h>
12
13struct mm_struct;
14
15#endif /* !__ASSEMBLY__ */
16
17#ifdef CONFIG_PPC_BOOK3S
18#include <asm/book3s/pgtable.h>
19#else
20#include <asm/nohash/pgtable.h>
21#endif /* !CONFIG_PPC_BOOK3S */
22
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
42#ifndef __ASSEMBLY__
43
44#include <asm/tlbflush.h>
45
46/* Keep these as a macros to avoid include dependency mess */
47#define pte_page(x) pfn_to_page(pte_pfn(x))
48#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
49/*
50 * Select all bits except the pfn
51 */
52static inline pgprot_t pte_pgprot(pte_t pte)
53{
54 unsigned long pte_flags;
55
56 pte_flags = pte_val(pte) & ~PTE_RPN_MASK;
57 return __pgprot(pte_flags);
58}
59
60/*
61 * ZERO_PAGE is a global shared page that is always zero: used
62 * for zero-mapped memory areas etc..
63 */
64extern unsigned long empty_zero_page[];
65#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
66
67extern pgd_t swapper_pg_dir[];
68
69extern void paging_init(void);
70
71extern unsigned long ioremap_bot;
72
73/*
74 * kern_addr_valid is intended to indicate whether an address is a valid
75 * kernel address. Most 32-bit archs define it as always true (like this)
76 * but most 64-bit archs actually perform a test. What should we do here?
77 */
78#define kern_addr_valid(addr) (1)
79
80#include <asm-generic/pgtable.h>
81
82#ifndef CONFIG_TRANSPARENT_HUGEPAGE
83#define pmd_large(pmd) 0
84#endif
85
86/* can we use this in kvm */
87unsigned long vmalloc_to_phys(void *vmalloc_addr);
88
89void pgtable_cache_add(unsigned int shift);
90
91#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
92void mark_initmem_nx(void);
93#else
94static inline void mark_initmem_nx(void) { }
95#endif
96
97/*
98 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
99 * so we are sure it is included when arriving here.
100 */
101#ifdef PTE_FRAG_NR
102static inline void *pte_frag_get(mm_context_t *ctx)
103{
104 return ctx->pte_frag;
105}
106
107static inline void pte_frag_set(mm_context_t *ctx, void *p)
108{
109 ctx->pte_frag = p;
110}
111#else
112#define PTE_FRAG_NR 1
113#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT
114#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
115
116static inline void *pte_frag_get(mm_context_t *ctx)
117{
118 return NULL;
119}
120
121static inline void pte_frag_set(mm_context_t *ctx, void *p)
122{
123}
124#endif
125
126#ifndef pmd_is_leaf
127#define pmd_is_leaf pmd_is_leaf
128static inline bool pmd_is_leaf(pmd_t pmd)
129{
130 return false;
131}
132#endif
133
134#ifndef pud_is_leaf
135#define pud_is_leaf pud_is_leaf
136static inline bool pud_is_leaf(pud_t pud)
137{
138 return false;
139}
140#endif
141
142#ifndef pgd_is_leaf
143#define pgd_is_leaf pgd_is_leaf
144static inline bool pgd_is_leaf(pgd_t pgd)
145{
146 return false;
147}
148#endif
149
150#ifdef CONFIG_PPC64
151#define is_ioremap_addr is_ioremap_addr
152static inline bool is_ioremap_addr(const void *x)
153{
154 unsigned long addr = (unsigned long)x;
155
156 return addr >= IOREMAP_BASE && addr < IOREMAP_END;
157}
158#endif /* CONFIG_PPC64 */
159
160#endif /* __ASSEMBLY__ */
161
162#endif /* _ASM_POWERPC_PGTABLE_H */