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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 | ||
1da177e4 LT |
11 | #ifdef CONFIG_SUN4 |
12 | #define PAGE_SHIFT 13 | |
13 | #else | |
14 | #define PAGE_SHIFT 12 | |
15 | #endif | |
16 | #ifndef __ASSEMBLY__ | |
17 | /* I have my suspicions... -DaveM */ | |
18 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
19 | #else | |
20 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
21 | #endif | |
22 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
23 | ||
1da177e4 LT |
24 | #include <asm/btfixup.h> |
25 | ||
26 | #ifndef __ASSEMBLY__ | |
27 | ||
28 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
29 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
30 | #define clear_user_page(addr, vaddr, page) \ | |
31 | do { clear_page(addr); \ | |
32 | sparc_flush_page_to_ram(page); \ | |
33 | } while (0) | |
34 | #define copy_user_page(to, from, vaddr, page) \ | |
35 | do { copy_page(to, from); \ | |
36 | sparc_flush_page_to_ram(page); \ | |
37 | } while (0) | |
38 | ||
39 | /* The following structure is used to hold the physical | |
40 | * memory configuration of the machine. This is filled in | |
9f2b2a5f DM |
41 | * prom_meminit() and is later used by mem_init() to set up |
42 | * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of | |
1da177e4 LT |
43 | * these structs, this is arbitrary. The entry after the |
44 | * last valid one has num_bytes==0. | |
45 | */ | |
1da177e4 LT |
46 | struct sparc_phys_banks { |
47 | unsigned long base_addr; | |
48 | unsigned long num_bytes; | |
49 | }; | |
50 | ||
51 | #define SPARC_PHYS_BANKS 32 | |
52 | ||
53 | extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; | |
54 | ||
55 | /* Cache alias structure. Entry is valid if context != -1. */ | |
56 | struct cache_palias { | |
57 | unsigned long vaddr; | |
58 | int context; | |
59 | }; | |
60 | ||
61 | extern struct cache_palias *sparc_aliases; | |
62 | ||
63 | /* passing structs on the Sparc slow us down tremendously... */ | |
64 | ||
65 | /* #define STRICT_MM_TYPECHECKS */ | |
66 | ||
67 | #ifdef STRICT_MM_TYPECHECKS | |
68 | /* | |
69 | * These are used to make use of C type-checking.. | |
70 | */ | |
71 | typedef struct { unsigned long pte; } pte_t; | |
72 | typedef struct { unsigned long iopte; } iopte_t; | |
73 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
74 | typedef struct { unsigned long pgd; } pgd_t; | |
75 | typedef struct { unsigned long ctxd; } ctxd_t; | |
76 | typedef struct { unsigned long pgprot; } pgprot_t; | |
77 | typedef struct { unsigned long iopgprot; } iopgprot_t; | |
78 | ||
79 | #define pte_val(x) ((x).pte) | |
80 | #define iopte_val(x) ((x).iopte) | |
81 | #define pmd_val(x) ((x).pmdv[0]) | |
82 | #define pgd_val(x) ((x).pgd) | |
83 | #define ctxd_val(x) ((x).ctxd) | |
84 | #define pgprot_val(x) ((x).pgprot) | |
85 | #define iopgprot_val(x) ((x).iopgprot) | |
86 | ||
87 | #define __pte(x) ((pte_t) { (x) } ) | |
88 | #define __iopte(x) ((iopte_t) { (x) } ) | |
89 | /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ | |
90 | #define __pgd(x) ((pgd_t) { (x) } ) | |
91 | #define __ctxd(x) ((ctxd_t) { (x) } ) | |
92 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
93 | #define __iopgprot(x) ((iopgprot_t) { (x) } ) | |
94 | ||
95 | #else | |
96 | /* | |
97 | * .. while these make it easier on the compiler | |
98 | */ | |
99 | typedef unsigned long pte_t; | |
100 | typedef unsigned long iopte_t; | |
101 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
102 | typedef unsigned long pgd_t; | |
103 | typedef unsigned long ctxd_t; | |
104 | typedef unsigned long pgprot_t; | |
105 | typedef unsigned long iopgprot_t; | |
106 | ||
107 | #define pte_val(x) (x) | |
108 | #define iopte_val(x) (x) | |
109 | #define pmd_val(x) ((x).pmdv[0]) | |
110 | #define pgd_val(x) (x) | |
111 | #define ctxd_val(x) (x) | |
112 | #define pgprot_val(x) (x) | |
113 | #define iopgprot_val(x) (x) | |
114 | ||
115 | #define __pte(x) (x) | |
116 | #define __iopte(x) (x) | |
117 | /* #define __pmd(x) (x) */ /* XXX later */ | |
118 | #define __pgd(x) (x) | |
119 | #define __ctxd(x) (x) | |
120 | #define __pgprot(x) (x) | |
121 | #define __iopgprot(x) (x) | |
122 | ||
123 | #endif | |
124 | ||
2f569afd MS |
125 | typedef struct page *pgtable_t; |
126 | ||
1da177e4 LT |
127 | extern unsigned long sparc_unmapped_base; |
128 | ||
129 | BTFIXUPDEF_SETHI(sparc_unmapped_base) | |
130 | ||
131 | #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) | |
132 | ||
1da177e4 LT |
133 | #else /* !(__ASSEMBLY__) */ |
134 | ||
135 | #define __pgprot(x) (x) | |
136 | ||
137 | #endif /* !(__ASSEMBLY__) */ | |
138 | ||
139 | /* to align the pointer to the (next) page boundary */ | |
140 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
141 | ||
142 | #define PAGE_OFFSET 0xf0000000 | |
143 | #ifndef __ASSEMBLY__ | |
144 | extern unsigned long phys_base; | |
145 | extern unsigned long pfn_base; | |
146 | #endif | |
147 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) | |
148 | #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) | |
149 | ||
150 | #define virt_to_phys __pa | |
151 | #define phys_to_virt __va | |
152 | ||
064b2a07 | 153 | #define ARCH_PFN_OFFSET (pfn_base) |
1da177e4 LT |
154 | #define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT))) |
155 | ||
156 | #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) | |
157 | #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) | |
158 | ||
159 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
160 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
161 | ||
064b2a07 | 162 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
163 | #include <asm-generic/page.h> |
164 | ||
1da177e4 | 165 | #endif /* _SPARC_PAGE_H */ |