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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 | #ifndef __ia32_PAGE_H__ |
29 | #ifndef __ia32_PAGE_H__ |
30 | #define __ia32_PAGE_H__ |
30 | #define __ia32_PAGE_H__ |
31 | 31 | ||
32 | #include <arch/mm/frame.h> |
32 | #include <arch/mm/frame.h> |
33 | 33 | ||
34 | #define PAGE_WIDTH FRAME_WIDTH |
34 | #define PAGE_WIDTH FRAME_WIDTH |
35 | #define PAGE_SIZE FRAME_SIZE |
35 | #define PAGE_SIZE FRAME_SIZE |
36 | 36 | ||
37 | #ifdef KERNEL |
37 | #ifdef KERNEL |
38 | 38 | ||
39 | #ifndef __ASM__ |
39 | #ifndef __ASM__ |
40 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
40 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
41 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
41 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
42 | #else |
42 | #else |
43 | # define KA2PA(x) ((x) - 0x80000000) |
43 | # define KA2PA(x) ((x) - 0x80000000) |
44 | # define PA2KA(x) ((x) + 0x80000000) |
44 | # define PA2KA(x) ((x) + 0x80000000) |
45 | #endif |
45 | #endif |
46 | 46 | ||
47 | /* |
47 | /* |
48 | * Implementation of generic 4-level page table interface. |
48 | * Implementation of generic 4-level page table interface. |
49 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
49 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
50 | */ |
50 | */ |
51 | #define PTL0_ENTRIES_ARCH 1024 |
51 | #define PTL0_ENTRIES_ARCH 1024 |
52 | #define PTL1_ENTRIES_ARCH 0 |
52 | #define PTL1_ENTRIES_ARCH 0 |
53 | #define PTL2_ENTRIES_ARCH 0 |
53 | #define PTL2_ENTRIES_ARCH 0 |
54 | #define PTL3_ENTRIES_ARCH 1024 |
54 | #define PTL3_ENTRIES_ARCH 1024 |
55 | 55 | ||
56 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
56 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
57 | #define PTL1_INDEX_ARCH(vaddr) 0 |
57 | #define PTL1_INDEX_ARCH(vaddr) 0 |
58 | #define PTL2_INDEX_ARCH(vaddr) 0 |
58 | #define PTL2_INDEX_ARCH(vaddr) 0 |
59 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
59 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
60 | 60 | ||
61 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
61 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
62 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
62 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
63 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
63 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
64 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
64 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
65 | 65 | ||
66 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
66 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
67 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
67 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
68 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
68 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
69 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
69 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
70 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
70 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
71 | 71 | ||
72 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
72 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
73 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
73 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
74 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
74 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
75 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
75 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
76 | 76 | ||
77 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
77 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
78 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
78 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
79 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
79 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
80 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
80 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
81 | 81 | ||
82 | #define PTE_VALID_ARCH(p) (*((__u32 *) (p)) != 0) |
82 | #define PTE_VALID_ARCH(p) (*((__u32 *) (p)) != 0) |
- | 83 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
|
- | 84 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address<<FRAME_WIDTH) |
|
83 | 85 | ||
84 | #ifndef __ASM__ |
86 | #ifndef __ASM__ |
85 | 87 | ||
86 | #include <mm/page.h> |
88 | #include <mm/page.h> |
87 | #include <arch/types.h> |
89 | #include <arch/types.h> |
88 | #include <arch/mm/frame.h> |
90 | #include <arch/mm/frame.h> |
89 | #include <typedefs.h> |
91 | #include <typedefs.h> |
90 | 92 | ||
91 | /** Page Table Entry. */ |
93 | /** Page Table Entry. */ |
92 | struct page_specifier { |
94 | struct page_specifier { |
93 | unsigned present : 1; |
95 | unsigned present : 1; |
94 | unsigned writeable : 1; |
96 | unsigned writeable : 1; |
95 | unsigned uaccessible : 1; |
97 | unsigned uaccessible : 1; |
96 | unsigned page_write_through : 1; |
98 | unsigned page_write_through : 1; |
97 | unsigned page_cache_disable : 1; |
99 | unsigned page_cache_disable : 1; |
98 | unsigned accessed : 1; |
100 | unsigned accessed : 1; |
99 | unsigned dirty : 1; |
101 | unsigned dirty : 1; |
100 | unsigned pat : 1; |
102 | unsigned pat : 1; |
101 | unsigned global : 1; |
103 | unsigned global : 1; |
102 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
104 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
103 | unsigned avl : 2; |
105 | unsigned avl : 2; |
104 | unsigned frame_address : 20; |
106 | unsigned frame_address : 20; |
105 | } __attribute__ ((packed)); |
107 | } __attribute__ ((packed)); |
106 | 108 | ||
107 | static inline int get_pt_flags(pte_t *pt, index_t i) |
109 | static inline int get_pt_flags(pte_t *pt, index_t i) |
108 | { |
110 | { |
109 | pte_t *p = &pt[i]; |
111 | pte_t *p = &pt[i]; |
110 | 112 | ||
111 | return ( |
113 | return ( |
112 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
114 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
113 | (!p->present)<<PAGE_PRESENT_SHIFT | |
115 | (!p->present)<<PAGE_PRESENT_SHIFT | |
114 | p->uaccessible<<PAGE_USER_SHIFT | |
116 | p->uaccessible<<PAGE_USER_SHIFT | |
115 | 1<<PAGE_READ_SHIFT | |
117 | 1<<PAGE_READ_SHIFT | |
116 | p->writeable<<PAGE_WRITE_SHIFT | |
118 | p->writeable<<PAGE_WRITE_SHIFT | |
117 | 1<<PAGE_EXEC_SHIFT | |
119 | 1<<PAGE_EXEC_SHIFT | |
118 | p->global<<PAGE_GLOBAL_SHIFT |
120 | p->global<<PAGE_GLOBAL_SHIFT |
119 | ); |
121 | ); |
120 | } |
122 | } |
121 | 123 | ||
122 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
124 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
123 | { |
125 | { |
124 | pte_t *p = &pt[i]; |
126 | pte_t *p = &pt[i]; |
125 | 127 | ||
126 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
128 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
127 | p->present = !(flags & PAGE_NOT_PRESENT); |
129 | p->present = !(flags & PAGE_NOT_PRESENT); |
128 | p->uaccessible = (flags & PAGE_USER) != 0; |
130 | p->uaccessible = (flags & PAGE_USER) != 0; |
129 | p->writeable = (flags & PAGE_WRITE) != 0; |
131 | p->writeable = (flags & PAGE_WRITE) != 0; |
130 | p->global = (flags & PAGE_GLOBAL) != 0; |
132 | p->global = (flags & PAGE_GLOBAL) != 0; |
131 | 133 | ||
132 | /* |
134 | /* |
133 | * Ensure that there is at least one bit set even if the present bit is cleared. |
135 | * Ensure that there is at least one bit set even if the present bit is cleared. |
134 | */ |
136 | */ |
135 | p->soft_valid = true; |
137 | p->soft_valid = true; |
136 | } |
138 | } |
137 | 139 | ||
138 | extern void page_arch_init(void); |
140 | extern void page_arch_init(void); |
139 | 141 | ||
140 | #endif /* __ASM__ */ |
142 | #endif /* __ASM__ */ |
141 | 143 | ||
142 | #endif /* KERNEL */ |
144 | #endif /* KERNEL */ |
143 | 145 | ||
144 | #endif |
146 | #endif |
145 | 147 |