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4b87d7a4 | 1 | /* |
1f84e1ea MS |
2 | * VM ops |
3 | * | |
4 | * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> | |
5 | * Copyright (C) 2008-2009 PetaLogix | |
4b87d7a4 MS |
6 | * Copyright (C) 2006 Atmark Techno, Inc. |
7 | * Changes for MMU support: | |
8 | * Copyright (C) 2007 Xilinx, Inc. All rights reserved. | |
9 | * | |
10 | * This file is subject to the terms and conditions of the GNU General Public | |
11 | * License. See the file "COPYING" in the main directory of this archive | |
12 | * for more details. | |
13 | */ | |
14 | ||
15 | #ifndef _ASM_MICROBLAZE_PAGE_H | |
16 | #define _ASM_MICROBLAZE_PAGE_H | |
17 | ||
18 | #include <linux/pfn.h> | |
19 | #include <asm/setup.h> | |
a1253977 | 20 | #include <asm/asm-compat.h> |
1f84e1ea MS |
21 | #include <linux/const.h> |
22 | ||
23 | #ifdef __KERNEL__ | |
4b87d7a4 MS |
24 | |
25 | /* PAGE_SHIFT determines the page size */ | |
26 | #define PAGE_SHIFT (12) | |
1f84e1ea | 27 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
4b87d7a4 MS |
28 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
29 | ||
a1253977 JW |
30 | #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) |
31 | ||
4b87d7a4 MS |
32 | #ifndef __ASSEMBLY__ |
33 | ||
34 | #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) | |
35 | #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) | |
36 | ||
37 | /* align addr on a size boundary - adjust address up/down if needed */ | |
38 | #define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1))) | |
39 | #define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1))) | |
40 | ||
41 | /* align addr on a size boundary - adjust address up if needed */ | |
42 | #define _ALIGN(addr, size) _ALIGN_UP(addr, size) | |
43 | ||
1f84e1ea | 44 | #ifndef CONFIG_MMU |
4b87d7a4 MS |
45 | /* |
46 | * PAGE_OFFSET -- the first address of the first page of memory. When not | |
47 | * using MMU this corresponds to the first free page in physical memory (aligned | |
48 | * on a page boundary). | |
49 | */ | |
50 | extern unsigned int __page_offset; | |
51 | #define PAGE_OFFSET __page_offset | |
52 | ||
1f84e1ea | 53 | #else /* CONFIG_MMU */ |
4b87d7a4 | 54 | |
1f84e1ea MS |
55 | /* |
56 | * PAGE_OFFSET -- the first address of the first page of memory. With MMU | |
57 | * it is set to the kernel start address (aligned on a page boundary). | |
58 | * | |
59 | * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used | |
60 | * in arch/microblaze/Makefile. | |
61 | */ | |
62 | #define PAGE_OFFSET CONFIG_KERNEL_START | |
4b87d7a4 | 63 | |
1f84e1ea MS |
64 | /* |
65 | * MAP_NR -- given an address, calculate the index of the page struct which | |
66 | * points to the address's page. | |
67 | */ | |
68 | #define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT) | |
4b87d7a4 | 69 | |
1f84e1ea MS |
70 | /* |
71 | * The basic type of a PTE - 32 bit physical addressing. | |
72 | */ | |
73 | typedef unsigned long pte_basic_t; | |
74 | #define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */ | |
75 | #define PTE_FMT "%.8lx" | |
76 | ||
77 | #endif /* CONFIG_MMU */ | |
78 | ||
79 | # ifndef CONFIG_MMU | |
80 | # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) | |
81 | # define get_user_page(vaddr) __get_free_page(GFP_KERNEL) | |
82 | # define free_user_page(page, addr) free_page(addr) | |
83 | # else /* CONFIG_MMU */ | |
84 | extern void copy_page(void *to, void *from); | |
85 | # endif /* CONFIG_MMU */ | |
86 | ||
87 | # define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) | |
88 | ||
89 | # define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) | |
90 | # define copy_user_page(vto, vfrom, vaddr, topg) \ | |
4b87d7a4 MS |
91 | memcpy((vto), (vfrom), PAGE_SIZE) |
92 | ||
93 | /* | |
94 | * These are used to make use of C type-checking.. | |
95 | */ | |
96 | typedef struct page *pgtable_t; | |
97 | typedef struct { unsigned long pte; } pte_t; | |
98 | typedef struct { unsigned long pgprot; } pgprot_t; | |
1f84e1ea MS |
99 | /* FIXME this can depend on linux kernel version */ |
100 | # ifdef CONFIG_MMU | |
101 | typedef struct { unsigned long pmd; } pmd_t; | |
102 | typedef struct { unsigned long pgd; } pgd_t; | |
103 | # else /* CONFIG_MMU */ | |
4b87d7a4 MS |
104 | typedef struct { unsigned long ste[64]; } pmd_t; |
105 | typedef struct { pmd_t pue[1]; } pud_t; | |
106 | typedef struct { pud_t pge[1]; } pgd_t; | |
1f84e1ea | 107 | # endif /* CONFIG_MMU */ |
4b87d7a4 | 108 | |
1f84e1ea MS |
109 | # define pte_val(x) ((x).pte) |
110 | # define pgprot_val(x) ((x).pgprot) | |
4b87d7a4 | 111 | |
1f84e1ea MS |
112 | # ifdef CONFIG_MMU |
113 | # define pmd_val(x) ((x).pmd) | |
114 | # define pgd_val(x) ((x).pgd) | |
115 | # else /* CONFIG_MMU */ | |
116 | # define pmd_val(x) ((x).ste[0]) | |
117 | # define pud_val(x) ((x).pue[0]) | |
118 | # define pgd_val(x) ((x).pge[0]) | |
119 | # endif /* CONFIG_MMU */ | |
4b87d7a4 | 120 | |
1f84e1ea MS |
121 | # define __pte(x) ((pte_t) { (x) }) |
122 | # define __pmd(x) ((pmd_t) { (x) }) | |
123 | # define __pgd(x) ((pgd_t) { (x) }) | |
124 | # define __pgprot(x) ((pgprot_t) { (x) }) | |
4b87d7a4 MS |
125 | |
126 | /** | |
127 | * Conversions for virtual address, physical address, pfn, and struct | |
128 | * page are defined in the following files. | |
129 | * | |
130 | * virt -+ | |
131 | * | asm-microblaze/page.h | |
132 | * phys -+ | |
133 | * | linux/pfn.h | |
134 | * pfn -+ | |
135 | * | asm-generic/memory_model.h | |
136 | * page -+ | |
137 | * | |
138 | */ | |
139 | ||
140 | extern unsigned long max_low_pfn; | |
141 | extern unsigned long min_low_pfn; | |
142 | extern unsigned long max_pfn; | |
143 | ||
1f84e1ea MS |
144 | extern unsigned long memory_start; |
145 | extern unsigned long memory_end; | |
146 | extern unsigned long memory_size; | |
4b87d7a4 | 147 | |
1f84e1ea | 148 | extern int page_is_ram(unsigned long pfn); |
4b87d7a4 | 149 | |
1f84e1ea MS |
150 | # define phys_to_pfn(phys) (PFN_DOWN(phys)) |
151 | # define pfn_to_phys(pfn) (PFN_PHYS(pfn)) | |
4b87d7a4 | 152 | |
1f84e1ea MS |
153 | # define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) |
154 | # define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) | |
4b87d7a4 | 155 | |
1f84e1ea MS |
156 | # ifdef CONFIG_MMU |
157 | # define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr)) | |
158 | # else /* CONFIG_MMU */ | |
159 | # define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) | |
160 | # define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) | |
161 | # define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) | |
162 | # define page_to_bus(page) (page_to_phys(page)) | |
163 | # define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) | |
164 | # endif /* CONFIG_MMU */ | |
4b87d7a4 | 165 | |
1f84e1ea MS |
166 | # ifndef CONFIG_MMU |
167 | # define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) <= max_mapnr) | |
168 | # define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) | |
169 | # else /* CONFIG_MMU */ | |
170 | # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT) | |
171 | # define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET)) | |
172 | # define VALID_PAGE(page) ((page - mem_map) < max_mapnr) | |
173 | # endif /* CONFIG_MMU */ | |
4b87d7a4 | 174 | |
1f84e1ea | 175 | # endif /* __ASSEMBLY__ */ |
4b87d7a4 | 176 | |
1f84e1ea | 177 | #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) |
4b87d7a4 | 178 | |
4b87d7a4 | 179 | |
1f84e1ea MS |
180 | # ifndef CONFIG_MMU |
181 | # define __pa(vaddr) ((unsigned long) (vaddr)) | |
182 | # define __va(paddr) ((void *) (paddr)) | |
183 | # else /* CONFIG_MMU */ | |
184 | # define __pa(x) __virt_to_phys((unsigned long)(x)) | |
185 | # define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) | |
186 | # endif /* CONFIG_MMU */ | |
187 | ||
4b87d7a4 | 188 | |
1f84e1ea MS |
189 | /* Convert between virtual and physical address for MMU. */ |
190 | /* Handle MicroBlaze processor with virtual memory. */ | |
191 | #ifndef CONFIG_MMU | |
4b87d7a4 MS |
192 | #define __virt_to_phys(addr) addr |
193 | #define __phys_to_virt(addr) addr | |
1f84e1ea MS |
194 | #define tophys(rd, rs) addik rd, rs, 0 |
195 | #define tovirt(rd, rs) addik rd, rs, 0 | |
196 | #else | |
197 | #define __virt_to_phys(addr) \ | |
198 | ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) | |
199 | #define __phys_to_virt(addr) \ | |
200 | ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) | |
201 | #define tophys(rd, rs) \ | |
202 | addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START) | |
203 | #define tovirt(rd, rs) \ | |
204 | addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR) | |
205 | #endif /* CONFIG_MMU */ | |
4b87d7a4 MS |
206 | |
207 | #define TOPHYS(addr) __virt_to_phys(addr) | |
208 | ||
1f84e1ea MS |
209 | #ifdef CONFIG_MMU |
210 | #ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC | |
211 | #define WANT_PAGE_VIRTUAL 1 /* page alloc 2 relies on this */ | |
212 | #endif | |
213 | ||
214 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
215 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
216 | #endif /* CONFIG_MMU */ | |
217 | ||
4b87d7a4 MS |
218 | #endif /* __KERNEL__ */ |
219 | ||
220 | #include <asm-generic/memory_model.h> | |
5b17e1cd | 221 | #include <asm-generic/getorder.h> |
4b87d7a4 MS |
222 | |
223 | #endif /* _ASM_MICROBLAZE_PAGE_H */ |