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/*
24 * Protection used for kernel text. We want the debuggers to be able to
25 * set breakpoints anywhere, so don't write protect the kernel text
26 * on platforms where such control is possible.
27 */
28#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \
29 defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
30#define PAGE_KERNEL_TEXT PAGE_KERNEL_X
31#else
32#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX
33#endif
34
35/* Make modules code happy. We don't set RO yet */
36#define PAGE_KERNEL_EXEC PAGE_KERNEL_X
37
38/* Advertise special mapping type for AGP */
39#define PAGE_AGP (PAGE_KERNEL_NC)
40#define HAVE_PAGE_AGP
41
42#ifndef __ASSEMBLY__
43
44#ifndef MAX_PTRS_PER_PGD
45#define MAX_PTRS_PER_PGD PTRS_PER_PGD
46#endif
47
48/* Keep these as a macros to avoid include dependency mess */
49#define pte_page(x) pfn_to_page(pte_pfn(x))
50#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
51/*
52 * Select all bits except the pfn
53 */
54static inline pgprot_t pte_pgprot(pte_t pte)
55{
56 unsigned long pte_flags;
57
58 pte_flags = pte_val(pte) & ~PTE_RPN_MASK;
59 return __pgprot(pte_flags);
60}
61
62#ifndef pmd_page_vaddr
63static inline unsigned long pmd_page_vaddr(pmd_t pmd)
64{
65 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS));
66}
67#define pmd_page_vaddr pmd_page_vaddr
68#endif
69/*
70 * ZERO_PAGE is a global shared page that is always zero: used
71 * for zero-mapped memory areas etc..
72 */
73extern unsigned long empty_zero_page[];
74#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
75
76extern pgd_t swapper_pg_dir[];
77
78extern void paging_init(void);
79void poking_init(void);
80
81extern unsigned long ioremap_bot;
82extern const pgprot_t protection_map[16];
83
84#ifndef CONFIG_TRANSPARENT_HUGEPAGE
85#define pmd_large(pmd) 0
86#endif
87
88/* can we use this in kvm */
89unsigned long vmalloc_to_phys(void *vmalloc_addr);
90
91void pgtable_cache_add(unsigned int shift);
92
93pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va);
94
95#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
96void mark_initmem_nx(void);
97#else
98static inline void mark_initmem_nx(void) { }
99#endif
100
101/*
102 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
103 * so we are sure it is included when arriving here.
104 */
105#ifdef PTE_FRAG_NR
106static inline void *pte_frag_get(mm_context_t *ctx)
107{
108 return ctx->pte_frag;
109}
110
111static inline void pte_frag_set(mm_context_t *ctx, void *p)
112{
113 ctx->pte_frag = p;
114}
115#else
116#define PTE_FRAG_NR 1
117#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT
118#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
119
120static inline void *pte_frag_get(mm_context_t *ctx)
121{
122 return NULL;
123}
124
125static inline void pte_frag_set(mm_context_t *ctx, void *p)
126{
127}
128#endif
129
130#ifndef pmd_is_leaf
131#define pmd_is_leaf pmd_is_leaf
132static inline bool pmd_is_leaf(pmd_t pmd)
133{
134 return false;
135}
136#endif
137
138#ifndef pud_is_leaf
139#define pud_is_leaf pud_is_leaf
140static inline bool pud_is_leaf(pud_t pud)
141{
142 return false;
143}
144#endif
145
146#ifndef p4d_is_leaf
147#define p4d_is_leaf p4d_is_leaf
148static inline bool p4d_is_leaf(p4d_t p4d)
149{
150 return false;
151}
152#endif
153
154#define pmd_pgtable pmd_pgtable
155static inline pgtable_t pmd_pgtable(pmd_t pmd)
156{
157 return (pgtable_t)pmd_page_vaddr(pmd);
158}
159
160#ifdef CONFIG_PPC64
161#define is_ioremap_addr is_ioremap_addr
162static inline bool is_ioremap_addr(const void *x)
163{
164 unsigned long addr = (unsigned long)x;
165
166 return addr >= IOREMAP_BASE && addr < IOREMAP_END;
167}
168
169struct seq_file;
170void arch_report_meminfo(struct seq_file *m);
171#endif /* CONFIG_PPC64 */
172
173#endif /* __ASSEMBLY__ */
174
175#endif /* _ASM_POWERPC_PGTABLE_H */