Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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#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;
82
83/*
84 * kern_addr_valid is intended to indicate whether an address is a valid
85 * kernel address. Most 32-bit archs define it as always true (like this)
86 * but most 64-bit archs actually perform a test. What should we do here?
87 */
88#define kern_addr_valid(addr) (1)
89
90#ifndef CONFIG_TRANSPARENT_HUGEPAGE
91#define pmd_large(pmd) 0
92#endif
93
94/* can we use this in kvm */
95unsigned long vmalloc_to_phys(void *vmalloc_addr);
96
97void pgtable_cache_add(unsigned int shift);
98
99pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va);
100
101#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
102void mark_initmem_nx(void);
103#else
104static inline void mark_initmem_nx(void) { }
105#endif
106
107/*
108 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
109 * so we are sure it is included when arriving here.
110 */
111#ifdef PTE_FRAG_NR
112static inline void *pte_frag_get(mm_context_t *ctx)
113{
114 return ctx->pte_frag;
115}
116
117static inline void pte_frag_set(mm_context_t *ctx, void *p)
118{
119 ctx->pte_frag = p;
120}
121#else
122#define PTE_FRAG_NR 1
123#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT
124#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
125
126static inline void *pte_frag_get(mm_context_t *ctx)
127{
128 return NULL;
129}
130
131static inline void pte_frag_set(mm_context_t *ctx, void *p)
132{
133}
134#endif
135
136#ifndef pmd_is_leaf
137#define pmd_is_leaf pmd_is_leaf
138static inline bool pmd_is_leaf(pmd_t pmd)
139{
140 return false;
141}
142#endif
143
144#ifndef pud_is_leaf
145#define pud_is_leaf pud_is_leaf
146static inline bool pud_is_leaf(pud_t pud)
147{
148 return false;
149}
150#endif
151
152#ifndef p4d_is_leaf
153#define p4d_is_leaf p4d_is_leaf
154static inline bool p4d_is_leaf(p4d_t p4d)
155{
156 return false;
157}
158#endif
159
160#define pmd_pgtable pmd_pgtable
161static inline pgtable_t pmd_pgtable(pmd_t pmd)
162{
163 return (pgtable_t)pmd_page_vaddr(pmd);
164}
165
166#ifdef CONFIG_PPC64
167#define is_ioremap_addr is_ioremap_addr
168static inline bool is_ioremap_addr(const void *x)
169{
170 unsigned long addr = (unsigned long)x;
171
172 return addr >= IOREMAP_BASE && addr < IOREMAP_END;
173}
174
175struct seq_file;
176void arch_report_meminfo(struct seq_file *m);
177#endif /* CONFIG_PPC64 */
178
179#endif /* __ASSEMBLY__ */
180
181#endif /* _ASM_POWERPC_PGTABLE_H */