Rev 760 | Rev 832 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
684 | jermar | 1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
||
3 | * All rights reserved. |
||
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
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 |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
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 |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
29 | /* |
||
30 | * This is the generic 4-level page table interface. |
||
31 | * Architectures that use hierarchical page tables |
||
32 | * are supposed to implement *_ARCH macros. |
||
33 | */ |
||
34 | |||
35 | #ifndef __PAGE_PT_H__ |
||
36 | #define __PAGE_PT_H__ |
||
37 | |||
38 | #include <arch/types.h> |
||
39 | #include <typedefs.h> |
||
40 | #include <mm/page.h> |
||
41 | |||
42 | /* |
||
43 | * These macros process vaddr and extract those portions |
||
44 | * of it that function as indices to respective page tables. |
||
45 | */ |
||
46 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
||
47 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
||
48 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
||
49 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
||
50 | |||
51 | #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
||
52 | |||
53 | /* |
||
54 | * These macros traverse the 4-level tree of page tables, |
||
55 | * each descending by one level. |
||
56 | */ |
||
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) |
||
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) |
||
61 | |||
62 | /* |
||
63 | * These macros are provided to change shape of the 4-level |
||
64 | * tree of page tables on respective level. |
||
65 | */ |
||
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) |
||
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) |
||
70 | |||
71 | /* |
||
72 | * These macros are provided to query various flags within the page tables. |
||
73 | */ |
||
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) |
||
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) |
||
78 | |||
79 | /* |
||
80 | * These macros are provided to set/clear various flags within the page tables. |
||
81 | */ |
||
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) |
||
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) |
||
86 | |||
793 | jermar | 87 | extern page_mapping_operations_t pt_mapping_operations; |
684 | jermar | 88 | |
756 | jermar | 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); |
||
684 | jermar | 91 | |
92 | #endif |