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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ia32mm |
29 | /** @addtogroup ia32mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_ia32_PAGE_H_ |
35 | #ifndef KERN_ia32_PAGE_H_ |
36 | #define KERN_ia32_PAGE_H_ |
36 | #define KERN_ia32_PAGE_H_ |
37 | 37 | ||
38 | #include <arch/mm/frame.h> |
38 | #include <arch/mm/frame.h> |
39 | 39 | ||
40 | #define PAGE_WIDTH FRAME_WIDTH |
40 | #define PAGE_WIDTH FRAME_WIDTH |
41 | #define PAGE_SIZE FRAME_SIZE |
41 | #define PAGE_SIZE FRAME_SIZE |
42 | 42 | ||
- | 43 | #define PAGE_COLOR_BITS 0 /* dummy */ |
|
- | 44 | ||
43 | #ifdef KERNEL |
45 | #ifdef KERNEL |
44 | 46 | ||
45 | #ifndef __ASM__ |
47 | #ifndef __ASM__ |
46 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
48 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
47 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
49 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
48 | #else |
50 | #else |
49 | # define KA2PA(x) ((x) - 0x80000000) |
51 | # define KA2PA(x) ((x) - 0x80000000) |
50 | # define PA2KA(x) ((x) + 0x80000000) |
52 | # define PA2KA(x) ((x) + 0x80000000) |
51 | #endif |
53 | #endif |
52 | 54 | ||
53 | /* |
55 | /* |
54 | * Implementation of generic 4-level page table interface. |
56 | * Implementation of generic 4-level page table interface. |
55 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
57 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
56 | */ |
58 | */ |
57 | #define PTL0_ENTRIES_ARCH 1024 |
59 | #define PTL0_ENTRIES_ARCH 1024 |
58 | #define PTL1_ENTRIES_ARCH 0 |
60 | #define PTL1_ENTRIES_ARCH 0 |
59 | #define PTL2_ENTRIES_ARCH 0 |
61 | #define PTL2_ENTRIES_ARCH 0 |
60 | #define PTL3_ENTRIES_ARCH 1024 |
62 | #define PTL3_ENTRIES_ARCH 1024 |
61 | 63 | ||
62 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
64 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
63 | #define PTL1_INDEX_ARCH(vaddr) 0 |
65 | #define PTL1_INDEX_ARCH(vaddr) 0 |
64 | #define PTL2_INDEX_ARCH(vaddr) 0 |
66 | #define PTL2_INDEX_ARCH(vaddr) 0 |
65 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
67 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
66 | 68 | ||
67 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
69 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
68 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
70 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
69 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
71 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
70 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
72 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
71 | 73 | ||
72 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0))) |
74 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0))) |
73 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
75 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
74 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
76 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
75 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
77 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
76 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
78 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
77 | 79 | ||
78 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
80 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
79 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
81 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
80 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
82 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
81 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
83 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
82 | 84 | ||
83 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
85 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
84 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
86 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
85 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
87 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
86 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
88 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
87 | 89 | ||
88 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
90 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
89 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
91 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
90 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address<<FRAME_WIDTH) |
92 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address<<FRAME_WIDTH) |
91 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
93 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
92 | #define PTE_EXECUTABLE_ARCH(p) 1 |
94 | #define PTE_EXECUTABLE_ARCH(p) 1 |
93 | 95 | ||
94 | #ifndef __ASM__ |
96 | #ifndef __ASM__ |
95 | 97 | ||
96 | #include <mm/page.h> |
98 | #include <mm/page.h> |
97 | #include <arch/types.h> |
99 | #include <arch/types.h> |
98 | #include <arch/mm/frame.h> |
100 | #include <arch/mm/frame.h> |
99 | #include <typedefs.h> |
101 | #include <typedefs.h> |
100 | 102 | ||
101 | /* Page fault error codes. */ |
103 | /* Page fault error codes. */ |
102 | 104 | ||
103 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
105 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
104 | #define PFERR_CODE_P (1<<0) |
106 | #define PFERR_CODE_P (1<<0) |
105 | 107 | ||
106 | /** When bit on this position is 1, the page fault was caused by a write. */ |
108 | /** When bit on this position is 1, the page fault was caused by a write. */ |
107 | #define PFERR_CODE_RW (1<<1) |
109 | #define PFERR_CODE_RW (1<<1) |
108 | 110 | ||
109 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
111 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
110 | #define PFERR_CODE_US (1<<2) |
112 | #define PFERR_CODE_US (1<<2) |
111 | 113 | ||
112 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
114 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
113 | #define PFERR_CODE_RSVD (1<<3) |
115 | #define PFERR_CODE_RSVD (1<<3) |
114 | 116 | ||
115 | /** Page Table Entry. */ |
117 | /** Page Table Entry. */ |
116 | struct page_specifier { |
118 | struct page_specifier { |
117 | unsigned present : 1; |
119 | unsigned present : 1; |
118 | unsigned writeable : 1; |
120 | unsigned writeable : 1; |
119 | unsigned uaccessible : 1; |
121 | unsigned uaccessible : 1; |
120 | unsigned page_write_through : 1; |
122 | unsigned page_write_through : 1; |
121 | unsigned page_cache_disable : 1; |
123 | unsigned page_cache_disable : 1; |
122 | unsigned accessed : 1; |
124 | unsigned accessed : 1; |
123 | unsigned dirty : 1; |
125 | unsigned dirty : 1; |
124 | unsigned pat : 1; |
126 | unsigned pat : 1; |
125 | unsigned global : 1; |
127 | unsigned global : 1; |
126 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
128 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
127 | unsigned avl : 2; |
129 | unsigned avl : 2; |
128 | unsigned frame_address : 20; |
130 | unsigned frame_address : 20; |
129 | } __attribute__ ((packed)); |
131 | } __attribute__ ((packed)); |
130 | 132 | ||
131 | static inline int get_pt_flags(pte_t *pt, index_t i) |
133 | static inline int get_pt_flags(pte_t *pt, index_t i) |
132 | { |
134 | { |
133 | pte_t *p = &pt[i]; |
135 | pte_t *p = &pt[i]; |
134 | 136 | ||
135 | return ( |
137 | return ( |
136 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
138 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
137 | (!p->present)<<PAGE_PRESENT_SHIFT | |
139 | (!p->present)<<PAGE_PRESENT_SHIFT | |
138 | p->uaccessible<<PAGE_USER_SHIFT | |
140 | p->uaccessible<<PAGE_USER_SHIFT | |
139 | 1<<PAGE_READ_SHIFT | |
141 | 1<<PAGE_READ_SHIFT | |
140 | p->writeable<<PAGE_WRITE_SHIFT | |
142 | p->writeable<<PAGE_WRITE_SHIFT | |
141 | 1<<PAGE_EXEC_SHIFT | |
143 | 1<<PAGE_EXEC_SHIFT | |
142 | p->global<<PAGE_GLOBAL_SHIFT |
144 | p->global<<PAGE_GLOBAL_SHIFT |
143 | ); |
145 | ); |
144 | } |
146 | } |
145 | 147 | ||
146 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
148 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
147 | { |
149 | { |
148 | pte_t *p = &pt[i]; |
150 | pte_t *p = &pt[i]; |
149 | 151 | ||
150 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
152 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
151 | p->present = !(flags & PAGE_NOT_PRESENT); |
153 | p->present = !(flags & PAGE_NOT_PRESENT); |
152 | p->uaccessible = (flags & PAGE_USER) != 0; |
154 | p->uaccessible = (flags & PAGE_USER) != 0; |
153 | p->writeable = (flags & PAGE_WRITE) != 0; |
155 | p->writeable = (flags & PAGE_WRITE) != 0; |
154 | p->global = (flags & PAGE_GLOBAL) != 0; |
156 | p->global = (flags & PAGE_GLOBAL) != 0; |
155 | 157 | ||
156 | /* |
158 | /* |
157 | * Ensure that there is at least one bit set even if the present bit is cleared. |
159 | * Ensure that there is at least one bit set even if the present bit is cleared. |
158 | */ |
160 | */ |
159 | p->soft_valid = true; |
161 | p->soft_valid = true; |
160 | } |
162 | } |
161 | 163 | ||
162 | extern void page_arch_init(void); |
164 | extern void page_arch_init(void); |
163 | extern void page_fault(int n, istate_t *istate); |
165 | extern void page_fault(int n, istate_t *istate); |
164 | 166 | ||
165 | #endif /* __ASM__ */ |
167 | #endif /* __ASM__ */ |
166 | 168 | ||
167 | #endif /* KERNEL */ |
169 | #endif /* KERNEL */ |
168 | 170 | ||
169 | #endif |
171 | #endif |
170 | 172 | ||
171 | /** @} |
173 | /** @} |
172 | */ |
174 | */ |
173 | 175 |