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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
3be80aae VG |
2 | /* |
3 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
3be80aae | 4 | */ |
3be80aae VG |
5 | #ifndef __ASM_ARC_PAGE_H |
6 | #define __ASM_ARC_PAGE_H | |
7 | ||
8c2f4a8d | 8 | #include <uapi/asm/page.h> |
3be80aae | 9 | |
5dda4dc5 VG |
10 | #ifndef __ASSEMBLY__ |
11 | ||
5dda4dc5 VG |
12 | #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) |
13 | #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) | |
14 | ||
4102b533 VG |
15 | struct vm_area_struct; |
16 | struct page; | |
17 | ||
18 | #define __HAVE_ARCH_COPY_USER_HIGHPAGE | |
19 | ||
20 | void copy_user_highpage(struct page *to, struct page *from, | |
21 | unsigned long u_vaddr, struct vm_area_struct *vma); | |
22 | void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); | |
23 | ||
5dda4dc5 VG |
24 | #undef STRICT_MM_TYPECHECKS |
25 | ||
26 | #ifdef STRICT_MM_TYPECHECKS | |
27 | /* | |
28 | * These are used to make use of C type-checking.. | |
29 | */ | |
30 | typedef struct { | |
5035cd5b VG |
31 | #ifdef CONFIG_ARC_HAS_PAE40 |
32 | unsigned long long pte; | |
33 | #else | |
5dda4dc5 | 34 | unsigned long pte; |
5035cd5b | 35 | #endif |
5dda4dc5 VG |
36 | } pte_t; |
37 | typedef struct { | |
38 | unsigned long pgd; | |
39 | } pgd_t; | |
40 | typedef struct { | |
41 | unsigned long pgprot; | |
42 | } pgprot_t; | |
5dda4dc5 VG |
43 | |
44 | #define pte_val(x) ((x).pte) | |
45 | #define pgd_val(x) ((x).pgd) | |
46 | #define pgprot_val(x) ((x).pgprot) | |
47 | ||
48 | #define __pte(x) ((pte_t) { (x) }) | |
49 | #define __pgd(x) ((pgd_t) { (x) }) | |
50 | #define __pgprot(x) ((pgprot_t) { (x) }) | |
51 | ||
4368902b GBY |
52 | #define pte_pgprot(x) __pgprot(pte_val(x)) |
53 | ||
5dda4dc5 VG |
54 | #else /* !STRICT_MM_TYPECHECKS */ |
55 | ||
5a364c2a VG |
56 | #ifdef CONFIG_ARC_HAS_PAE40 |
57 | typedef unsigned long long pte_t; | |
58 | #else | |
5dda4dc5 | 59 | typedef unsigned long pte_t; |
5a364c2a | 60 | #endif |
5dda4dc5 VG |
61 | typedef unsigned long pgd_t; |
62 | typedef unsigned long pgprot_t; | |
5dda4dc5 VG |
63 | |
64 | #define pte_val(x) (x) | |
65 | #define pgd_val(x) (x) | |
66 | #define pgprot_val(x) (x) | |
67 | #define __pte(x) (x) | |
fe6c1b86 | 68 | #define __pgd(x) (x) |
5dda4dc5 | 69 | #define __pgprot(x) (x) |
4368902b | 70 | #define pte_pgprot(x) (x) |
5dda4dc5 VG |
71 | |
72 | #endif | |
73 | ||
e8a75963 VG |
74 | typedef pte_t * pgtable_t; |
75 | ||
2519d753 VG |
76 | /* |
77 | * Use virt_to_pfn with caution: | |
78 | * If used in pte or paddr related macros, it could cause truncation | |
79 | * in PAE40 builds | |
80 | * As a rule of thumb, only use it in helpers starting with virt_ | |
81 | * You have been warned ! | |
82 | */ | |
c2ff5cf2 VG |
83 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) |
84 | ||
9ed68785 | 85 | #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) |
5dda4dc5 | 86 | |
26f9d5fd | 87 | #ifdef CONFIG_FLATMEM |
c2ff5cf2 | 88 | #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) |
26f9d5fd | 89 | #endif |
5dda4dc5 VG |
90 | |
91 | /* | |
92 | * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) | |
93 | * | |
94 | * These macros have historically been misnamed | |
95 | * virt here means link-address/program-address as embedded in object code. | |
c2ff5cf2 | 96 | * And for ARC, link-addr = physical address |
5dda4dc5 | 97 | */ |
2519d753 | 98 | #define __pa(vaddr) ((unsigned long)(vaddr)) |
5dda4dc5 VG |
99 | #define __va(paddr) ((void *)((unsigned long)(paddr))) |
100 | ||
26f9d5fd | 101 | #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) |
c2ff5cf2 | 102 | #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) |
5dda4dc5 | 103 | |
3abc9448 | 104 | /* Default Permissions for stack/heaps pages (Non Executable) */ |
93312b6d | 105 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
5dda4dc5 VG |
106 | |
107 | #define WANT_PAGE_VIRTUAL 1 | |
108 | ||
109 | #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ | |
110 | #include <asm-generic/getorder.h> | |
111 | ||
3be80aae VG |
112 | #endif /* !__ASSEMBLY__ */ |
113 | ||
3be80aae | 114 | #endif |