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1 | /* |
1 | /* |
2 | * Copyright (c) 2005 Ondrej Palkovsky |
2 | * Copyright (c) 2005 Ondrej Palkovsky |
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 amd64mm |
29 | /** @addtogroup amd64mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | /** Paging on AMD64 |
35 | /** Paging on AMD64 |
36 | * |
36 | * |
37 | * The space is divided in positive numbers - userspace and |
37 | * The space is divided in positive numbers - userspace and |
38 | * negative numbers - kernel space. The 'negative' space starting |
38 | * negative numbers - kernel space. The 'negative' space starting |
39 | * with 0xffff800000000000 and ending with 0xffffffff80000000 |
39 | * with 0xffff800000000000 and ending with 0xffffffff80000000 |
40 | * (-2GB) is identically mapped physical memory. The area |
40 | * (-2GB) is identically mapped physical memory. The area |
41 | * (0xffffffff80000000 ... 0xffffffffffffffff is again identically |
41 | * (0xffffffff80000000 ... 0xffffffffffffffff is again identically |
42 | * mapped first 2GB. |
42 | * mapped first 2GB. |
43 | * |
43 | * |
44 | * ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel |
44 | * ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel |
45 | */ |
45 | */ |
46 | 46 | ||
47 | #ifndef KERN_amd64_PAGE_H_ |
47 | #ifndef KERN_amd64_PAGE_H_ |
48 | #define KERN_amd64_PAGE_H_ |
48 | #define KERN_amd64_PAGE_H_ |
49 | 49 | ||
50 | #include <arch/mm/frame.h> |
50 | #include <arch/mm/frame.h> |
51 | 51 | ||
52 | #define PAGE_WIDTH FRAME_WIDTH |
52 | #define PAGE_WIDTH FRAME_WIDTH |
53 | #define PAGE_SIZE FRAME_SIZE |
53 | #define PAGE_SIZE FRAME_SIZE |
54 | 54 | ||
55 | #define PAGE_COLOR_BITS 0 /* dummy */ |
55 | #define PAGE_COLOR_BITS 0 /* dummy */ |
56 | 56 | ||
57 | #ifdef KERNEL |
57 | #ifdef KERNEL |
58 | 58 | ||
59 | #ifndef __ASM__ |
59 | #ifndef __ASM__ |
60 | # include <mm/page.h> |
60 | # include <mm/mm.h> |
61 | # include <arch/types.h> |
61 | # include <arch/types.h> |
62 | #endif |
62 | # include <arch/interrupt.h> |
63 | 63 | ||
64 | #ifndef __ASM__ |
- | |
65 | static inline uintptr_t ka2pa(uintptr_t x) |
64 | static inline uintptr_t ka2pa(uintptr_t x) |
66 | { |
65 | { |
67 | if (x > 0xffffffff80000000) |
66 | if (x > 0xffffffff80000000) |
68 | return x - 0xffffffff80000000; |
67 | return x - 0xffffffff80000000; |
69 | else |
68 | else |
70 | return x - 0xffff800000000000; |
69 | return x - 0xffff800000000000; |
71 | } |
70 | } |
- | 71 | ||
72 | # define KA2PA(x) ka2pa((uintptr_t)x) |
72 | # define KA2PA(x) ka2pa((uintptr_t)x) |
73 | # define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000) |
73 | # define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000) |
74 | # define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000) |
74 | # define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000) |
75 | #else |
75 | #else |
76 | # define KA2PA(x) ((x) - 0xffffffff80000000) |
76 | # define KA2PA(x) ((x) - 0xffffffff80000000) |
77 | # define PA2KA(x) ((x) + 0xffffffff80000000) |
77 | # define PA2KA(x) ((x) + 0xffffffff80000000) |
78 | #endif |
78 | #endif |
79 | 79 | ||
80 | #define PTL0_ENTRIES_ARCH 512 |
80 | #define PTL0_ENTRIES_ARCH 512 |
81 | #define PTL1_ENTRIES_ARCH 512 |
81 | #define PTL1_ENTRIES_ARCH 512 |
82 | #define PTL2_ENTRIES_ARCH 512 |
82 | #define PTL2_ENTRIES_ARCH 512 |
83 | #define PTL3_ENTRIES_ARCH 512 |
83 | #define PTL3_ENTRIES_ARCH 512 |
84 | 84 | ||
85 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff) |
85 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff) |
86 | #define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff) |
86 | #define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff) |
87 | #define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff) |
87 | #define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff) |
88 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff) |
88 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff) |
89 | 89 | ||
90 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 ))) |
90 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 ))) |
91 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 ))) |
91 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 ))) |
92 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 ))) |
92 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t *) ((((uint64_t) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 ))) |
93 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t *) ((((uint64_t) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 ))) |
93 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((uintptr_t *) ((((uint64_t) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((uint64_t) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 ))) |
94 | 94 | ||
95 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0))) |
95 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0))) |
96 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a) |
96 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a) |
97 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a) |
97 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a) |
98 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a) |
98 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a) |
99 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a) |
99 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a) |
100 | 100 | ||
101 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
101 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
102 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i)) |
102 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i)) |
103 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i)) |
103 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i)) |
104 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
104 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
105 | 105 | ||
106 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
106 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
107 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x)) |
107 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x)) |
108 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x)) |
108 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x)) |
109 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
109 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
110 | 110 | ||
111 | #define PTE_VALID_ARCH(p) (*((uint64_t *) (p)) != 0) |
111 | #define PTE_VALID_ARCH(p) (*((uint64_t *) (p)) != 0) |
112 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
112 | #define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
113 | #define PTE_GET_FRAME_ARCH(p) ((((uintptr_t)(p)->addr_12_31)<<12) | ((uintptr_t)(p)->addr_32_51<<32)) |
113 | #define PTE_GET_FRAME_ARCH(p) ((((uintptr_t)(p)->addr_12_31)<<12) | ((uintptr_t)(p)->addr_32_51<<32)) |
114 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
114 | #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0) |
115 | #define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0) |
115 | #define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0) |
116 | 116 | ||
117 | #ifndef __ASM__ |
117 | #ifndef __ASM__ |
118 | 118 | ||
119 | /* Page fault error codes. */ |
119 | /* Page fault error codes. */ |
120 | 120 | ||
121 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
121 | /** When bit on this position is 0, the page fault was caused by a not-present page. */ |
122 | #define PFERR_CODE_P (1<<0) |
122 | #define PFERR_CODE_P (1<<0) |
123 | 123 | ||
124 | /** When bit on this position is 1, the page fault was caused by a write. */ |
124 | /** When bit on this position is 1, the page fault was caused by a write. */ |
125 | #define PFERR_CODE_RW (1<<1) |
125 | #define PFERR_CODE_RW (1<<1) |
126 | 126 | ||
127 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
127 | /** When bit on this position is 1, the page fault was caused in user mode. */ |
128 | #define PFERR_CODE_US (1<<2) |
128 | #define PFERR_CODE_US (1<<2) |
129 | 129 | ||
130 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
130 | /** When bit on this position is 1, a reserved bit was set in page directory. */ |
131 | #define PFERR_CODE_RSVD (1<<3) |
131 | #define PFERR_CODE_RSVD (1<<3) |
132 | 132 | ||
133 | /** When bit on this position os 1, the page fault was caused during instruction fecth. */ |
133 | /** When bit on this position os 1, the page fault was caused during instruction fecth. */ |
134 | #define PFERR_CODE_ID (1<<4) |
134 | #define PFERR_CODE_ID (1<<4) |
135 | 135 | ||
136 | /** Page Table Entry. */ |
- | |
137 | struct page_specifier { |
- | |
138 | unsigned present : 1; |
- | |
139 | unsigned writeable : 1; |
- | |
140 | unsigned uaccessible : 1; |
- | |
141 | unsigned page_write_through : 1; |
- | |
142 | unsigned page_cache_disable : 1; |
- | |
143 | unsigned accessed : 1; |
- | |
144 | unsigned dirty : 1; |
- | |
145 | unsigned unused: 1; |
- | |
146 | unsigned global : 1; |
- | |
147 | unsigned soft_valid : 1; /**< Valid content even if present bit is cleared. */ |
- | |
148 | unsigned avl : 2; |
- | |
149 | unsigned addr_12_31 : 30; |
- | |
150 | unsigned addr_32_51 : 21; |
- | |
151 | unsigned no_execute : 1; |
- | |
152 | } __attribute__ ((packed)); |
- | |
153 | - | ||
154 | static inline int get_pt_flags(pte_t *pt, index_t i) |
136 | static inline int get_pt_flags(pte_t *pt, index_t i) |
155 | { |
137 | { |
156 | pte_t *p = &pt[i]; |
138 | pte_t *p = &pt[i]; |
157 | 139 | ||
158 | return ( |
140 | return ( |
159 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
141 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
160 | (!p->present)<<PAGE_PRESENT_SHIFT | |
142 | (!p->present)<<PAGE_PRESENT_SHIFT | |
161 | p->uaccessible<<PAGE_USER_SHIFT | |
143 | p->uaccessible<<PAGE_USER_SHIFT | |
162 | 1<<PAGE_READ_SHIFT | |
144 | 1<<PAGE_READ_SHIFT | |
163 | p->writeable<<PAGE_WRITE_SHIFT | |
145 | p->writeable<<PAGE_WRITE_SHIFT | |
164 | (!p->no_execute)<<PAGE_EXEC_SHIFT | |
146 | (!p->no_execute)<<PAGE_EXEC_SHIFT | |
165 | p->global<<PAGE_GLOBAL_SHIFT |
147 | p->global<<PAGE_GLOBAL_SHIFT |
166 | ); |
148 | ); |
167 | } |
149 | } |
168 | 150 | ||
169 | static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a) |
151 | static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a) |
170 | { |
152 | { |
171 | pte_t *p = &pt[i]; |
153 | pte_t *p = &pt[i]; |
172 | 154 | ||
173 | p->addr_12_31 = (a >> 12) & 0xfffff; |
155 | p->addr_12_31 = (a >> 12) & 0xfffff; |
174 | p->addr_32_51 = a >> 32; |
156 | p->addr_32_51 = a >> 32; |
175 | } |
157 | } |
176 | 158 | ||
177 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
159 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
178 | { |
160 | { |
179 | pte_t *p = &pt[i]; |
161 | pte_t *p = &pt[i]; |
180 | 162 | ||
181 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
163 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
182 | p->present = !(flags & PAGE_NOT_PRESENT); |
164 | p->present = !(flags & PAGE_NOT_PRESENT); |
183 | p->uaccessible = (flags & PAGE_USER) != 0; |
165 | p->uaccessible = (flags & PAGE_USER) != 0; |
184 | p->writeable = (flags & PAGE_WRITE) != 0; |
166 | p->writeable = (flags & PAGE_WRITE) != 0; |
185 | p->no_execute = (flags & PAGE_EXEC) == 0; |
167 | p->no_execute = (flags & PAGE_EXEC) == 0; |
186 | p->global = (flags & PAGE_GLOBAL) != 0; |
168 | p->global = (flags & PAGE_GLOBAL) != 0; |
187 | 169 | ||
188 | /* |
170 | /* |
189 | * Ensure that there is at least one bit set even if the present bit is cleared. |
171 | * Ensure that there is at least one bit set even if the present bit is cleared. |
190 | */ |
172 | */ |
191 | p->soft_valid = 1; |
173 | p->soft_valid = 1; |
192 | } |
174 | } |
193 | 175 | ||
194 | extern void page_arch_init(void); |
176 | extern void page_arch_init(void); |
195 | extern void page_fault(int n, istate_t *istate); |
177 | extern void page_fault(int n, istate_t *istate); |
196 | 178 | ||
197 | #endif /* __ASM__ */ |
179 | #endif /* __ASM__ */ |
198 | 180 | ||
199 | #endif /* KERNEL */ |
181 | #endif /* KERNEL */ |
200 | 182 | ||
201 | #endif |
183 | #endif |
202 | 184 | ||
203 | /** @} |
185 | /** @} |
204 | */ |
186 | */ |
205 | 187 |