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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 <mm/page.h> |
32 | #include <mm/page.h> |
33 | #include <arch/types.h> |
33 | #include <arch/types.h> |
34 | #include <arch/mm/frame.h> |
34 | #include <arch/mm/frame.h> |
35 | #include <typedefs.h> |
35 | #include <typedefs.h> |
36 | 36 | ||
37 | #define PAGE_SIZE FRAME_SIZE |
37 | #define PAGE_SIZE FRAME_SIZE |
38 | 38 | ||
39 | #define KA2PA(x) ((x) - 0x80000000) |
39 | #define KA2PA(x) ((x) - 0x80000000) |
40 | #define PA2KA(x) ((x) + 0x80000000) |
40 | #define PA2KA(x) ((x) + 0x80000000) |
41 | 41 | ||
42 | /* |
42 | /* |
43 | * Implementation of generic 4-level page table interface. |
43 | * Implementation of generic 4-level page table interface. |
44 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
44 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
45 | */ |
45 | */ |
46 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
46 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
47 | #define PTL1_INDEX_ARCH(vaddr) 0 |
47 | #define PTL1_INDEX_ARCH(vaddr) 0 |
48 | #define PTL2_INDEX_ARCH(vaddr) 0 |
48 | #define PTL2_INDEX_ARCH(vaddr) 0 |
49 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
49 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
50 | 50 | ||
51 | #define GET_PTL0_ADDRESS_ARCH() ((pte_t *) read_cr3()) |
51 | #define GET_PTL0_ADDRESS_ARCH() ((pte_t *) read_cr3()) |
52 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
52 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
53 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
53 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
54 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
54 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
55 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
55 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
56 | 56 | ||
57 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
57 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
58 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
58 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12) |
59 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
59 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
60 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
60 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
61 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
61 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12) |
62 | 62 | ||
63 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
63 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
64 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
64 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
65 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
65 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
66 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
66 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
67 | 67 | ||
68 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
68 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
69 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
69 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
70 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
70 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
71 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
71 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
72 | 72 | ||
73 | struct page_specifier { |
73 | struct page_specifier { |
74 | unsigned present : 1; |
74 | unsigned present : 1; |
75 | unsigned writeable : 1; |
75 | unsigned writeable : 1; |
76 | unsigned uaccessible : 1; |
76 | unsigned uaccessible : 1; |
77 | unsigned page_write_through : 1; |
77 | unsigned page_write_through : 1; |
78 | unsigned page_cache_disable : 1; |
78 | unsigned page_cache_disable : 1; |
79 | unsigned accessed : 1; |
79 | unsigned accessed : 1; |
80 | unsigned dirty : 1; |
80 | unsigned dirty : 1; |
81 | unsigned : 2; |
81 | unsigned : 2; |
82 | unsigned avl : 3; |
82 | unsigned avl : 3; |
83 | unsigned frame_address : 20; |
83 | unsigned frame_address : 20; |
84 | } __attribute__ ((packed)); |
84 | } __attribute__ ((packed)); |
85 | 85 | ||
86 | typedef struct page_specifier pte_t; |
86 | typedef struct page_specifier pte_t; |
87 | 87 | ||
88 | static inline int get_pt_flags(pte_t *pt, index_t i) |
88 | static inline int get_pt_flags(pte_t *pt, index_t i) |
89 | { |
89 | { |
90 | pte_t *p = &pt[i]; |
90 | pte_t *p = &pt[i]; |
91 | 91 | ||
92 | return ( |
92 | return ( |
93 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
93 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
94 | (!p->present)<<PAGE_PRESENT_SHIFT | |
94 | (!p->present)<<PAGE_PRESENT_SHIFT | |
95 | p->uaccessible<<PAGE_USER_SHIFT | |
95 | p->uaccessible<<PAGE_USER_SHIFT | |
96 | 1<<PAGE_READ_SHIFT | |
96 | 1<<PAGE_READ_SHIFT | |
97 | p->writeable<<PAGE_WRITE_SHIFT | |
97 | p->writeable<<PAGE_WRITE_SHIFT | |
98 | 1<<PAGE_EXEC_SHIFT |
98 | 1<<PAGE_EXEC_SHIFT |
99 | ); |
99 | ); |
100 | } |
100 | } |
101 | 101 | ||
102 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
102 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
103 | { |
103 | { |
104 | pte_t *p = &pt[i]; |
104 | pte_t *p = &pt[i]; |
105 | 105 | ||
106 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
106 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
107 | p->present = !(flags & PAGE_NOT_PRESENT); |
107 | p->present = !(flags & PAGE_NOT_PRESENT); |
108 | p->uaccessible = flags & PAGE_USER; |
108 | p->uaccessible = (flags & PAGE_USER) != 0; |
109 | p->writeable = flags & PAGE_WRITE; |
109 | p->writeable = (flags & PAGE_WRITE) != 0; |
110 | } |
110 | } |
111 | 111 | ||
112 | extern void page_arch_init(void); |
112 | extern void page_arch_init(void); |
113 | 113 | ||
114 | #endif |
114 | #endif |
115 | 115 |