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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 */
5#ifndef __ASM_ARC_PAGE_H
6#define __ASM_ARC_PAGE_H
7
8#include <uapi/asm/page.h>
9
10#ifdef CONFIG_ARC_HAS_PAE40
11
12#define MAX_POSSIBLE_PHYSMEM_BITS 40
13#define PAGE_MASK_PHYS (0xff00000000ull | PAGE_MASK)
14
15#else /* CONFIG_ARC_HAS_PAE40 */
16
17#define MAX_POSSIBLE_PHYSMEM_BITS 32
18#define PAGE_MASK_PHYS PAGE_MASK
19
20#endif /* CONFIG_ARC_HAS_PAE40 */
21
22#ifndef __ASSEMBLY__
23
24#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE)
25#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
26#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
27
28struct vm_area_struct;
29struct page;
30
31#define __HAVE_ARCH_COPY_USER_HIGHPAGE
32
33void copy_user_highpage(struct page *to, struct page *from,
34 unsigned long u_vaddr, struct vm_area_struct *vma);
35void clear_user_page(void *to, unsigned long u_vaddr, struct page *page);
36
37typedef struct {
38 unsigned long pgd;
39} pgd_t;
40
41#define pgd_val(x) ((x).pgd)
42#define __pgd(x) ((pgd_t) { (x) })
43
44#if CONFIG_PGTABLE_LEVELS > 3
45
46typedef struct {
47 unsigned long pud;
48} pud_t;
49
50#define pud_val(x) ((x).pud)
51#define __pud(x) ((pud_t) { (x) })
52
53#endif
54
55#if CONFIG_PGTABLE_LEVELS > 2
56
57typedef struct {
58 unsigned long pmd;
59} pmd_t;
60
61#define pmd_val(x) ((x).pmd)
62#define __pmd(x) ((pmd_t) { (x) })
63
64#endif
65
66typedef struct {
67#ifdef CONFIG_ARC_HAS_PAE40
68 unsigned long long pte;
69#else
70 unsigned long pte;
71#endif
72} pte_t;
73
74#define pte_val(x) ((x).pte)
75#define __pte(x) ((pte_t) { (x) })
76
77typedef struct {
78 unsigned long pgprot;
79} pgprot_t;
80
81#define pgprot_val(x) ((x).pgprot)
82#define __pgprot(x) ((pgprot_t) { (x) })
83#define pte_pgprot(x) __pgprot(pte_val(x))
84
85typedef struct page *pgtable_t;
86
87/*
88 * When HIGHMEM is enabled we have holes in the memory map so we need
89 * pfn_valid() that takes into account the actual extents of the physical
90 * memory
91 */
92#ifdef CONFIG_HIGHMEM
93
94extern unsigned long arch_pfn_offset;
95#define ARCH_PFN_OFFSET arch_pfn_offset
96
97extern int pfn_valid(unsigned long pfn);
98#define pfn_valid pfn_valid
99
100#else /* CONFIG_HIGHMEM */
101
102#define ARCH_PFN_OFFSET virt_to_pfn((void *)CONFIG_LINUX_RAM_BASE)
103
104#endif /* CONFIG_HIGHMEM */
105
106/*
107 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
108 *
109 * These macros have historically been misnamed
110 * virt here means link-address/program-address as embedded in object code.
111 * And for ARC, link-addr = physical address
112 */
113#define __pa(vaddr) ((unsigned long)(vaddr))
114#define __va(paddr) ((void *)((unsigned long)(paddr)))
115
116/*
117 * Use virt_to_pfn with caution:
118 * If used in pte or paddr related macros, it could cause truncation
119 * in PAE40 builds
120 * As a rule of thumb, only use it in helpers starting with virt_
121 * You have been warned !
122 */
123static inline unsigned long virt_to_pfn(const void *kaddr)
124{
125 return __pa(kaddr) >> PAGE_SHIFT;
126}
127
128#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
129#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
130
131/* Default Permissions for stack/heaps pages (Non Executable) */
132#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
133
134#define WANT_PAGE_VIRTUAL 1
135
136#include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */
137#include <asm-generic/getorder.h>
138
139#endif /* !__ASSEMBLY__ */
140
141#endif
1/*
2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#ifndef __ASM_ARC_PAGE_H
9#define __ASM_ARC_PAGE_H
10
11#include <uapi/asm/page.h>
12
13#ifndef __ASSEMBLY__
14
15#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE)
16#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
17
18struct vm_area_struct;
19struct page;
20
21#define __HAVE_ARCH_COPY_USER_HIGHPAGE
22
23void copy_user_highpage(struct page *to, struct page *from,
24 unsigned long u_vaddr, struct vm_area_struct *vma);
25void clear_user_page(void *to, unsigned long u_vaddr, struct page *page);
26
27#undef STRICT_MM_TYPECHECKS
28
29#ifdef STRICT_MM_TYPECHECKS
30/*
31 * These are used to make use of C type-checking..
32 */
33typedef struct {
34 unsigned long pte;
35} pte_t;
36typedef struct {
37 unsigned long pgd;
38} pgd_t;
39typedef struct {
40 unsigned long pgprot;
41} pgprot_t;
42
43#define pte_val(x) ((x).pte)
44#define pgd_val(x) ((x).pgd)
45#define pgprot_val(x) ((x).pgprot)
46
47#define __pte(x) ((pte_t) { (x) })
48#define __pgd(x) ((pgd_t) { (x) })
49#define __pgprot(x) ((pgprot_t) { (x) })
50
51#define pte_pgprot(x) __pgprot(pte_val(x))
52
53#else /* !STRICT_MM_TYPECHECKS */
54
55#ifdef CONFIG_ARC_HAS_PAE40
56typedef unsigned long long pte_t;
57#else
58typedef unsigned long pte_t;
59#endif
60typedef unsigned long pgd_t;
61typedef unsigned long pgprot_t;
62
63#define pte_val(x) (x)
64#define pgd_val(x) (x)
65#define pgprot_val(x) (x)
66#define __pte(x) (x)
67#define __pgd(x) (x)
68#define __pgprot(x) (x)
69#define pte_pgprot(x) (x)
70
71#endif
72
73typedef pte_t * pgtable_t;
74
75/*
76 * Use virt_to_pfn with caution:
77 * If used in pte or paddr related macros, it could cause truncation
78 * in PAE40 builds
79 * As a rule of thumb, only use it in helpers starting with virt_
80 * You have been warned !
81 */
82#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
83
84#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_LINK_BASE)
85
86#ifdef CONFIG_FLATMEM
87#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
88#endif
89
90/*
91 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
92 *
93 * These macros have historically been misnamed
94 * virt here means link-address/program-address as embedded in object code.
95 * And for ARC, link-addr = physical address
96 */
97#define __pa(vaddr) ((unsigned long)(vaddr))
98#define __va(paddr) ((void *)((unsigned long)(paddr)))
99
100#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
101#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
102
103/* Default Permissions for stack/heaps pages (Non Executable) */
104#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE)
105
106#define WANT_PAGE_VIRTUAL 1
107
108#include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */
109#include <asm-generic/getorder.h>
110
111#endif /* !__ASSEMBLY__ */
112
113#endif