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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 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 | /* |
29 | /* |
30 | * This is the generic 4-level page table interface. |
30 | * This is the generic 4-level page table interface. |
31 | * Architectures that use hierarchical page tables |
31 | * Architectures that use hierarchical page tables |
32 | * are supposed to implement *_ARCH macros. |
32 | * are supposed to implement *_ARCH macros. |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef __PAGE_PT_H__ |
35 | #ifndef __PAGE_PT_H__ |
36 | #define __PAGE_PT_H__ |
36 | #define __PAGE_PT_H__ |
37 | 37 | ||
38 | #include <arch/types.h> |
38 | #include <arch/types.h> |
39 | #include <typedefs.h> |
39 | #include <typedefs.h> |
40 | #include <mm/page.h> |
40 | #include <mm/page.h> |
41 | 41 | ||
42 | /* |
42 | /* |
43 | * These macros process vaddr and extract those portions |
43 | * These macros process vaddr and extract those portions |
44 | * of it that function as indices to respective page tables. |
44 | * of it that function as indices to respective page tables. |
45 | */ |
45 | */ |
46 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
46 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
47 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
47 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
48 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
48 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
49 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
49 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
50 | 50 | ||
51 | #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
51 | #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
52 | 52 | ||
53 | /* |
53 | /* |
54 | * These macros traverse the 4-level tree of page tables, |
54 | * These macros traverse the 4-level tree of page tables, |
55 | * each descending by one level. |
55 | * each descending by one level. |
56 | */ |
56 | */ |
57 | #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
57 | #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
58 | #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
58 | #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
59 | #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
59 | #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
60 | #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
60 | #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
61 | 61 | ||
62 | /* |
62 | /* |
63 | * These macros are provided to change shape of the 4-level |
63 | * These macros are provided to change shape of the 4-level |
64 | * tree of page tables on respective level. |
64 | * tree of page tables on respective level. |
65 | */ |
65 | */ |
66 | #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
66 | #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
67 | #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
67 | #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
68 | #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
68 | #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
69 | #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
69 | #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
70 | 70 | ||
71 | /* |
71 | /* |
72 | * These macros are provided to query various flags within the page tables. |
72 | * These macros are provided to query various flags within the page tables. |
73 | */ |
73 | */ |
74 | #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
74 | #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
75 | #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
75 | #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
76 | #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
76 | #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
77 | #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
77 | #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
78 | 78 | ||
79 | /* |
79 | /* |
80 | * These macros are provided to set/clear various flags within the page tables. |
80 | * These macros are provided to set/clear various flags within the page tables. |
81 | */ |
81 | */ |
82 | #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
82 | #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
83 | #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
83 | #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
84 | #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
84 | #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
85 | #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
85 | #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
86 | 86 | ||
87 | extern page_operations_t page_pt_operations; |
87 | extern page_mapping_operations_t pt_mapping_operations; |
88 | 88 | ||
89 | extern void page_mapping_insert_pt(as_t *as, __address page, __address frame, int flags); |
89 | extern void page_mapping_insert_pt(as_t *as, __address page, __address frame, int flags); |
90 | extern pte_t *page_mapping_find_pt(as_t *as, __address page); |
90 | extern pte_t *page_mapping_find_pt(as_t *as, __address page); |
91 | 91 | ||
92 | #endif |
92 | #endif |
93 | 93 |