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3be80aae VG |
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 | */ | |
3be80aae VG |
8 | #ifndef __ASM_ARC_PAGE_H |
9 | #define __ASM_ARC_PAGE_H | |
10 | ||
8c2f4a8d | 11 | #include <uapi/asm/page.h> |
3be80aae | 12 | |
5dda4dc5 VG |
13 | |
14 | #ifndef __ASSEMBLY__ | |
15 | ||
16 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) | |
17 | #define free_user_page(page, addr) free_page(addr) | |
18 | ||
19 | /* TBD: for now don't worry about VIPT D$ aliasing */ | |
20 | #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) | |
21 | #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) | |
22 | ||
23 | #define clear_user_page(addr, vaddr, pg) clear_page(addr) | |
24 | #define copy_user_page(vto, vfrom, vaddr, pg) copy_page(vto, vfrom) | |
25 | ||
26 | #undef STRICT_MM_TYPECHECKS | |
27 | ||
28 | #ifdef STRICT_MM_TYPECHECKS | |
29 | /* | |
30 | * These are used to make use of C type-checking.. | |
31 | */ | |
32 | typedef struct { | |
33 | unsigned long pte; | |
34 | } pte_t; | |
35 | typedef struct { | |
36 | unsigned long pgd; | |
37 | } pgd_t; | |
38 | typedef struct { | |
39 | unsigned long pgprot; | |
40 | } pgprot_t; | |
41 | typedef unsigned long pgtable_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 | #else /* !STRICT_MM_TYPECHECKS */ | |
52 | ||
53 | typedef unsigned long pte_t; | |
54 | typedef unsigned long pgd_t; | |
55 | typedef unsigned long pgprot_t; | |
56 | typedef unsigned long pgtable_t; | |
57 | ||
58 | #define pte_val(x) (x) | |
59 | #define pgd_val(x) (x) | |
60 | #define pgprot_val(x) (x) | |
61 | #define __pte(x) (x) | |
62 | #define __pgprot(x) (x) | |
63 | ||
64 | #endif | |
65 | ||
66 | #define ARCH_PFN_OFFSET (CONFIG_LINUX_LINK_BASE >> PAGE_SHIFT) | |
67 | ||
68 | #define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) | |
69 | ||
70 | /* | |
71 | * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) | |
72 | * | |
73 | * These macros have historically been misnamed | |
74 | * virt here means link-address/program-address as embedded in object code. | |
75 | * So if kernel img is linked at 0x8000_0000 onwards, 0x8010_0000 will be | |
76 | * 128th page, and virt_to_page( ) will return the struct page corresp to it. | |
77 | * mem_map[ ] is an array of struct page for each page frame in the system | |
78 | * | |
79 | * Independent of where linux is linked at, link-addr = physical address | |
80 | * So the old macro __pa = vaddr + PAGE_OFFSET - CONFIG_LINUX_LINK_BASE | |
81 | * would have been wrong in case kernel is not at 0x8zs | |
82 | */ | |
83 | #define __pa(vaddr) ((unsigned long)vaddr) | |
84 | #define __va(paddr) ((void *)((unsigned long)(paddr))) | |
85 | ||
86 | #define virt_to_page(kaddr) \ | |
87 | (mem_map + ((__pa(kaddr) - CONFIG_LINUX_LINK_BASE) >> PAGE_SHIFT)) | |
88 | ||
89 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
90 | ||
91 | /* Default Permissions for page, used in mmap.c */ | |
92 | #ifdef CONFIG_ARC_STACK_NONEXEC | |
93 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE) | |
94 | #else | |
95 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
96 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
97 | #endif | |
98 | ||
99 | #define WANT_PAGE_VIRTUAL 1 | |
100 | ||
101 | #include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */ | |
102 | #include <asm-generic/getorder.h> | |
103 | ||
3be80aae VG |
104 | #endif /* !__ASSEMBLY__ */ |
105 | ||
3be80aae | 106 | #endif |