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1da177e4 LT |
1 | /* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $ |
2 | * page.h: Various defines and such for MMU operations on the Sparc for | |
3 | * the Linux kernel. | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | */ | |
7 | ||
8 | #ifndef _SPARC_PAGE_H | |
9 | #define _SPARC_PAGE_H | |
10 | ||
11 | #include <linux/config.h> | |
12 | #ifdef CONFIG_SUN4 | |
13 | #define PAGE_SHIFT 13 | |
14 | #else | |
15 | #define PAGE_SHIFT 12 | |
16 | #endif | |
17 | #ifndef __ASSEMBLY__ | |
18 | /* I have my suspicions... -DaveM */ | |
19 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
20 | #else | |
21 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
22 | #endif | |
23 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
24 | ||
25 | #ifdef __KERNEL__ | |
26 | ||
27 | #include <asm/btfixup.h> | |
28 | ||
29 | #ifndef __ASSEMBLY__ | |
30 | ||
31 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
32 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
33 | #define clear_user_page(addr, vaddr, page) \ | |
34 | do { clear_page(addr); \ | |
35 | sparc_flush_page_to_ram(page); \ | |
36 | } while (0) | |
37 | #define copy_user_page(to, from, vaddr, page) \ | |
38 | do { copy_page(to, from); \ | |
39 | sparc_flush_page_to_ram(page); \ | |
40 | } while (0) | |
41 | ||
42 | /* The following structure is used to hold the physical | |
43 | * memory configuration of the machine. This is filled in | |
44 | * probe_memory() and is later used by mem_init() to set up | |
45 | * mem_map[]. We statically allocate SPARC_PHYS_BANKS of | |
46 | * these structs, this is arbitrary. The entry after the | |
47 | * last valid one has num_bytes==0. | |
48 | */ | |
49 | ||
50 | struct sparc_phys_banks { | |
51 | unsigned long base_addr; | |
52 | unsigned long num_bytes; | |
53 | }; | |
54 | ||
55 | #define SPARC_PHYS_BANKS 32 | |
56 | ||
57 | extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; | |
58 | ||
59 | /* Cache alias structure. Entry is valid if context != -1. */ | |
60 | struct cache_palias { | |
61 | unsigned long vaddr; | |
62 | int context; | |
63 | }; | |
64 | ||
65 | extern struct cache_palias *sparc_aliases; | |
66 | ||
67 | /* passing structs on the Sparc slow us down tremendously... */ | |
68 | ||
69 | /* #define STRICT_MM_TYPECHECKS */ | |
70 | ||
71 | #ifdef STRICT_MM_TYPECHECKS | |
72 | /* | |
73 | * These are used to make use of C type-checking.. | |
74 | */ | |
75 | typedef struct { unsigned long pte; } pte_t; | |
76 | typedef struct { unsigned long iopte; } iopte_t; | |
77 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
78 | typedef struct { unsigned long pgd; } pgd_t; | |
79 | typedef struct { unsigned long ctxd; } ctxd_t; | |
80 | typedef struct { unsigned long pgprot; } pgprot_t; | |
81 | typedef struct { unsigned long iopgprot; } iopgprot_t; | |
82 | ||
83 | #define pte_val(x) ((x).pte) | |
84 | #define iopte_val(x) ((x).iopte) | |
85 | #define pmd_val(x) ((x).pmdv[0]) | |
86 | #define pgd_val(x) ((x).pgd) | |
87 | #define ctxd_val(x) ((x).ctxd) | |
88 | #define pgprot_val(x) ((x).pgprot) | |
89 | #define iopgprot_val(x) ((x).iopgprot) | |
90 | ||
91 | #define __pte(x) ((pte_t) { (x) } ) | |
92 | #define __iopte(x) ((iopte_t) { (x) } ) | |
93 | /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ | |
94 | #define __pgd(x) ((pgd_t) { (x) } ) | |
95 | #define __ctxd(x) ((ctxd_t) { (x) } ) | |
96 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
97 | #define __iopgprot(x) ((iopgprot_t) { (x) } ) | |
98 | ||
99 | #else | |
100 | /* | |
101 | * .. while these make it easier on the compiler | |
102 | */ | |
103 | typedef unsigned long pte_t; | |
104 | typedef unsigned long iopte_t; | |
105 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
106 | typedef unsigned long pgd_t; | |
107 | typedef unsigned long ctxd_t; | |
108 | typedef unsigned long pgprot_t; | |
109 | typedef unsigned long iopgprot_t; | |
110 | ||
111 | #define pte_val(x) (x) | |
112 | #define iopte_val(x) (x) | |
113 | #define pmd_val(x) ((x).pmdv[0]) | |
114 | #define pgd_val(x) (x) | |
115 | #define ctxd_val(x) (x) | |
116 | #define pgprot_val(x) (x) | |
117 | #define iopgprot_val(x) (x) | |
118 | ||
119 | #define __pte(x) (x) | |
120 | #define __iopte(x) (x) | |
121 | /* #define __pmd(x) (x) */ /* XXX later */ | |
122 | #define __pgd(x) (x) | |
123 | #define __ctxd(x) (x) | |
124 | #define __pgprot(x) (x) | |
125 | #define __iopgprot(x) (x) | |
126 | ||
127 | #endif | |
128 | ||
129 | extern unsigned long sparc_unmapped_base; | |
130 | ||
131 | BTFIXUPDEF_SETHI(sparc_unmapped_base) | |
132 | ||
133 | #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) | |
134 | ||
1da177e4 LT |
135 | #else /* !(__ASSEMBLY__) */ |
136 | ||
137 | #define __pgprot(x) (x) | |
138 | ||
139 | #endif /* !(__ASSEMBLY__) */ | |
140 | ||
141 | /* to align the pointer to the (next) page boundary */ | |
142 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
143 | ||
144 | #define PAGE_OFFSET 0xf0000000 | |
145 | #ifndef __ASSEMBLY__ | |
146 | extern unsigned long phys_base; | |
147 | extern unsigned long pfn_base; | |
148 | #endif | |
149 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) | |
150 | #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) | |
151 | ||
152 | #define virt_to_phys __pa | |
153 | #define phys_to_virt __va | |
154 | ||
064b2a07 | 155 | #define ARCH_PFN_OFFSET (pfn_base) |
1da177e4 LT |
156 | #define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT))) |
157 | ||
158 | #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) | |
159 | #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) | |
160 | ||
161 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
162 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
163 | ||
164 | #endif /* __KERNEL__ */ | |
165 | ||
064b2a07 | 166 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
167 | #include <asm-generic/page.h> |
168 | ||
1da177e4 | 169 | #endif /* _SPARC_PAGE_H */ |