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#ifndef pmd_page_vaddr
61static inline unsigned long pmd_page_vaddr(pmd_t pmd)
62{
63	return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS));
64}
65#define pmd_page_vaddr pmd_page_vaddr
66#endif
67/*
68 * ZERO_PAGE is a global shared page that is always zero: used
69 * for zero-mapped memory areas etc..
70 */
71extern unsigned long empty_zero_page[];
72#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
73
74extern pgd_t swapper_pg_dir[];
75
76extern void paging_init(void);
77
78extern unsigned long ioremap_bot;
79
80/*
81 * kern_addr_valid is intended to indicate whether an address is a valid
82 * kernel address.  Most 32-bit archs define it as always true (like this)
83 * but most 64-bit archs actually perform a test.  What should we do here?
84 */
85#define kern_addr_valid(addr)	(1)
86
87#ifndef CONFIG_TRANSPARENT_HUGEPAGE
88#define pmd_large(pmd)		0
89#endif
90
91/* can we use this in kvm */
92unsigned long vmalloc_to_phys(void *vmalloc_addr);
93
94void pgtable_cache_add(unsigned int shift);
95
96pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va);
97
98#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
99void mark_initmem_nx(void);
100#else
101static inline void mark_initmem_nx(void) { }
102#endif
103
104/*
105 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
106 * so we are sure it is included when arriving here.
107 */
108#ifdef PTE_FRAG_NR
109static inline void *pte_frag_get(mm_context_t *ctx)
110{
111	return ctx->pte_frag;
112}
113
114static inline void pte_frag_set(mm_context_t *ctx, void *p)
115{
116	ctx->pte_frag = p;
117}
118#else
119#define PTE_FRAG_NR		1
120#define PTE_FRAG_SIZE_SHIFT	PAGE_SHIFT
121#define PTE_FRAG_SIZE		(1UL << PTE_FRAG_SIZE_SHIFT)
122
123static inline void *pte_frag_get(mm_context_t *ctx)
124{
125	return NULL;
126}
127
128static inline void pte_frag_set(mm_context_t *ctx, void *p)
129{
130}
131#endif
132
133#ifndef pmd_is_leaf
134#define pmd_is_leaf pmd_is_leaf
135static inline bool pmd_is_leaf(pmd_t pmd)
136{
137	return false;
138}
139#endif
140
141#ifndef pud_is_leaf
142#define pud_is_leaf pud_is_leaf
143static inline bool pud_is_leaf(pud_t pud)
144{
145	return false;
146}
147#endif
148
149#ifndef p4d_is_leaf
150#define p4d_is_leaf p4d_is_leaf
151static inline bool p4d_is_leaf(p4d_t p4d)
152{
153	return false;
154}
155#endif
156
157#ifdef CONFIG_PPC64
158#define is_ioremap_addr is_ioremap_addr
159static inline bool is_ioremap_addr(const void *x)
160{
161	unsigned long addr = (unsigned long)x;
162
163	return addr >= IOREMAP_BASE && addr < IOREMAP_END;
164}
165#endif /* CONFIG_PPC64 */
166
167#endif /* __ASSEMBLY__ */
168
169#endif /* _ASM_POWERPC_PGTABLE_H */
170