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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 xen32mm |
29 | /** @addtogroup xen32mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef __xen32_PAGE_H__ |
35 | #ifndef __xen32_PAGE_H__ |
36 | #define __xen32_PAGE_H__ |
36 | #define __xen32_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 | #ifdef KERNEL |
43 | #ifdef KERNEL |
44 | 44 | ||
45 | #ifndef __ASM__ |
45 | #ifndef __ASM__ |
- | 46 | # include <arch/hypercall.h> |
|
46 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
47 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
47 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
48 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
48 | #else |
49 | #else |
49 | # define KA2PA(x) ((x) - 0x80000000) |
50 | # define KA2PA(x) ((x) - 0x80000000) |
50 | # define PA2KA(x) ((x) + 0x80000000) |
51 | # define PA2KA(x) ((x) + 0x80000000) |
51 | #endif |
52 | #endif |
52 | 53 | ||
53 | /* |
54 | /* |
54 | * Implementation of generic 4-level page table interface. |
55 | * Implementation of generic 4-level page table interface. |
55 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
56 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
56 | */ |
57 | */ |
57 | #define PTL0_ENTRIES_ARCH 1024 |
58 | #define PTL0_ENTRIES_ARCH 1024 |
58 | #define PTL1_ENTRIES_ARCH 0 |
59 | #define PTL1_ENTRIES_ARCH 0 |
59 | #define PTL2_ENTRIES_ARCH 0 |
60 | #define PTL2_ENTRIES_ARCH 0 |
60 | #define PTL3_ENTRIES_ARCH 1024 |
61 | #define PTL3_ENTRIES_ARCH 1024 |
61 | 62 | ||
62 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
63 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ff) |
63 | #define PTL1_INDEX_ARCH(vaddr) 0 |
64 | #define PTL1_INDEX_ARCH(vaddr) 0 |
64 | #define PTL2_INDEX_ARCH(vaddr) 0 |
65 | #define PTL2_INDEX_ARCH(vaddr) 0 |
65 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
66 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ff) |
66 | 67 | ||
67 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
68 | #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) |
69 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
69 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
70 | #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)) |
71 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t)((((pte_t *)(ptl3))[(i)].frame_address) << 12)) |
71 | 72 | ||
72 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0))) |
73 | #define SET_PTL0_ADDRESS_ARCH(ptl0) { \ |
- | 74 | mmuext_op_t mmu_ext; \ |
|
- | 75 | mmu_ext.cmd = MMUEXT_NEW_BASEPTR; \ |
|
- | 76 | mmu_ext.arg1.mfn = ADDR2PFN(PA2MA(ptl0)); \ |
|
- | 77 | xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF); \ |
|
- | 78 | } |
|
73 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
79 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) { \ |
- | 80 | mmu_update_t update; \ |
|
- | 81 | update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl0))[(i)])); \ |
|
- | 82 | update.val = PA2MA(a); \ |
|
- | 83 | xen_mmu_update(&update, 1, NULL, DOMID_SELF); \ |
|
- | 84 | } |
|
74 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
85 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
75 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
86 | #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) |
87 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) { \ |
- | 88 | mmu_update_t update; \ |
|
- | 89 | update.ptr = PA2MA(KA2PA(&((pte_t *) (ptl3))[(i)])); \ |
|
- | 90 | update.val = PA2MA(a); \ |
|
- | 91 | xen_mmu_update(&update, 1, NULL, DOMID_SELF); \ |
|
- | 92 | } |
|
77 | 93 | ||
78 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
94 | #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 |
95 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
80 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
96 | #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)) |
97 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
82 | 98 | ||
83 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
99 | #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) |
100 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
85 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
101 | #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)) |
102 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
87 | 103 | ||
88 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
104 | #define PTE_VALID_ARCH(p) (*((uint32_t *) (p)) != 0) |
89 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
105 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
90 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address<<FRAME_WIDTH) |
106 | #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address << FRAME_WIDTH) |
91 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
107 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
92 | #define PTE_EXECUTABLE_ARCH(p) 1 |
108 | #define PTE_EXECUTABLE_ARCH(p) 1 |
93 | 109 | ||
94 | #ifndef __ASM__ |
110 | #ifndef __ASM__ |
95 | 111 | ||
96 | #include <mm/page.h> |
112 | #include <mm/page.h> |
97 | #include <arch/types.h> |
113 | #include <arch/types.h> |
98 | #include <arch/mm/frame.h> |
114 | #include <arch/mm/frame.h> |
99 | #include <typedefs.h> |
115 | #include <typedefs.h> |
100 | 116 | ||
101 | /* Page fault error codes. */ |
117 | /* Page fault error codes. */ |
102 | 118 | ||
103 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
119 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
104 | #define PFERR_CODE_P (1<<0) |
120 | #define PFERR_CODE_P (1 << 0) |
105 | 121 | ||
106 | /** When bit on this position is 1, the page fault was caused by a write. */ |
122 | /** When bit on this position is 1, the page fault was caused by a write. */ |
107 | #define PFERR_CODE_RW (1<<1) |
123 | #define PFERR_CODE_RW (1 << 1) |
108 | 124 | ||
109 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
125 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
110 | #define PFERR_CODE_US (1<<2) |
126 | #define PFERR_CODE_US (1 << 2) |
111 | 127 | ||
112 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
128 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
113 | #define PFERR_CODE_RSVD (1<<3) |
129 | #define PFERR_CODE_RSVD (1 << 3) |
114 | 130 | ||
115 | /** Page Table Entry. */ |
131 | /** Page Table Entry. */ |
116 | struct page_specifier { |
132 | struct page_specifier { |
117 | unsigned present : 1; |
133 | unsigned present : 1; |
118 | unsigned writeable : 1; |
134 | unsigned writeable : 1; |
119 | unsigned uaccessible : 1; |
135 | unsigned uaccessible : 1; |
120 | unsigned page_write_through : 1; |
136 | unsigned page_write_through : 1; |
121 | unsigned page_cache_disable : 1; |
137 | unsigned page_cache_disable : 1; |
122 | unsigned accessed : 1; |
138 | unsigned accessed : 1; |
123 | unsigned dirty : 1; |
139 | unsigned dirty : 1; |
124 | unsigned pat : 1; |
140 | unsigned pat : 1; |
125 | unsigned global : 1; |
141 | unsigned global : 1; |
126 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
142 | unsigned soft_valid : 1; /**< Valid content even if the present bit is not set. */ |
127 | unsigned avl : 2; |
143 | unsigned avl : 2; |
128 | unsigned frame_address : 20; |
144 | unsigned frame_address : 20; |
129 | } __attribute__ ((packed)); |
145 | } __attribute__ ((packed)); |
130 | 146 | ||
131 | static inline int get_pt_flags(pte_t *pt, index_t i) |
147 | static inline int get_pt_flags(pte_t *pt, index_t i) |
132 | { |
148 | { |
133 | pte_t *p = &pt[i]; |
149 | pte_t *p = &pt[i]; |
134 | 150 | ||
135 | return ( |
151 | return ( |
136 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
152 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
137 | (!p->present)<<PAGE_PRESENT_SHIFT | |
153 | (!p->present)<<PAGE_PRESENT_SHIFT | |
138 | p->uaccessible<<PAGE_USER_SHIFT | |
154 | p->uaccessible<<PAGE_USER_SHIFT | |
139 | 1<<PAGE_READ_SHIFT | |
155 | 1<<PAGE_READ_SHIFT | |
140 | p->writeable<<PAGE_WRITE_SHIFT | |
156 | p->writeable<<PAGE_WRITE_SHIFT | |
141 | 1<<PAGE_EXEC_SHIFT | |
157 | 1<<PAGE_EXEC_SHIFT | |
142 | p->global<<PAGE_GLOBAL_SHIFT |
158 | p->global<<PAGE_GLOBAL_SHIFT |
143 | ); |
159 | ); |
144 | } |
160 | } |
145 | 161 | ||
146 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
162 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
147 | { |
163 | { |
148 | pte_t *p = &pt[i]; |
164 | pte_t *p = &pt[i]; |
149 | 165 | ||
150 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
166 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
151 | p->present = !(flags & PAGE_NOT_PRESENT); |
167 | p->present = !(flags & PAGE_NOT_PRESENT); |
152 | p->uaccessible = (flags & PAGE_USER) != 0; |
168 | p->uaccessible = (flags & PAGE_USER) != 0; |
153 | p->writeable = (flags & PAGE_WRITE) != 0; |
169 | p->writeable = (flags & PAGE_WRITE) != 0; |
154 | p->global = (flags & PAGE_GLOBAL) != 0; |
170 | p->global = (flags & PAGE_GLOBAL) != 0; |
155 | 171 | ||
156 | /* |
172 | /* |
157 | * Ensure that there is at least one bit set even if the present bit is cleared. |
173 | * Ensure that there is at least one bit set even if the present bit is cleared. |
158 | */ |
174 | */ |
159 | p->soft_valid = true; |
175 | p->soft_valid = true; |
160 | } |
176 | } |
161 | 177 | ||
162 | extern void page_arch_init(void); |
178 | extern void page_arch_init(void); |
163 | extern void page_fault(int n, istate_t *istate); |
179 | extern void page_fault(int n, istate_t *istate); |
164 | 180 | ||
165 | #endif /* __ASM__ */ |
181 | #endif /* __ASM__ */ |
166 | 182 | ||
167 | #endif /* KERNEL */ |
183 | #endif /* KERNEL */ |
168 | 184 | ||
169 | #endif |
185 | #endif |
170 | 186 | ||
171 | /** @} |
187 | /** @} |
172 | */ |
188 | */ |
173 | 189 |