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1 | /* |
1 | /* |
2 | * Copyright (C) 2003-2004 Jakub Jermar |
2 | * Copyright (C) 2003-2004 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 __mips32_PAGE_H__ |
29 | #ifndef __mips32_PAGE_H__ |
30 | #define __mips32_PAGE_H__ |
30 | #define __mips32_PAGE_H__ |
31 | 31 | ||
32 | #define PAGE_SIZE FRAME_SIZE |
32 | #define PAGE_SIZE FRAME_SIZE |
33 | 33 | ||
34 | #ifndef __ASM__ |
34 | #ifndef __ASM__ |
35 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
35 | # define KA2PA(x) (((__address) (x)) - 0x80000000) |
36 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
36 | # define PA2KA(x) (((__address) (x)) + 0x80000000) |
37 | #else |
37 | #else |
38 | # define KA2PA(x) ((x) - 0x80000000) |
38 | # define KA2PA(x) ((x) - 0x80000000) |
39 | # define PA2KA(x) ((x) + 0x80000000) |
39 | # define PA2KA(x) ((x) + 0x80000000) |
40 | #endif |
40 | #endif |
41 | 41 | ||
42 | /* |
42 | /* |
43 | * Implementation of generic 4-level page table interface. |
43 | * Implementation of generic 4-level page table interface. |
44 | * NOTE: this implementation is under construction |
44 | * NOTE: this implementation is under construction |
45 | * |
45 | * |
46 | * Page table layout: |
46 | * Page table layout: |
47 | * - 32-bit virtual addresses |
47 | * - 32-bit virtual addresses |
48 | * - Offset is 14 bits => pages are 16K long |
48 | * - Offset is 14 bits => pages are 16K long |
49 | * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long |
49 | * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long |
50 | * - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed) |
50 | * - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed) |
51 | * - PTL0 has 64 entries (6 bits) |
51 | * - PTL0 has 64 entries (6 bits) |
52 | * - PTL1 is not used |
52 | * - PTL1 is not used |
53 | * - PTL2 is not used |
53 | * - PTL2 is not used |
54 | * - PTL3 has 4096 entries (12 bits) |
54 | * - PTL3 has 4096 entries (12 bits) |
55 | */ |
55 | */ |
56 | 56 | ||
57 | #define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26) |
57 | #define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26) |
58 | #define PTL1_INDEX_ARCH(vaddr) 0 |
58 | #define PTL1_INDEX_ARCH(vaddr) 0 |
59 | #define PTL2_INDEX_ARCH(vaddr) 0 |
59 | #define PTL2_INDEX_ARCH(vaddr) 0 |
60 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0x3fff) |
60 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0x3fff) |
61 | 61 | ||
62 | #define GET_PTL0_ADDRESS_ARCH() (PTL0) |
62 | #define GET_PTL0_ADDRESS_ARCH() (PTL0) |
63 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (PTL0 = (pte_t *)(ptl0)) |
63 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (PTL0 = (pte_t *)(ptl0)) |
64 | 64 | ||
65 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].lo.pfn<<12) |
65 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].lo.pfn<<12) |
66 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
66 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
67 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
67 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
68 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].lo.pfn<<12) |
68 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].lo.pfn<<12) |
69 | 69 | ||
70 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].lo.pfn = (a)>>12) |
70 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].lo.pfn = (a)>>12) |
71 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
71 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
72 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
72 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
73 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].lo.pfn = (a)>>12) |
73 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].lo.pfn = (a)>>12) |
74 | 74 | ||
75 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
75 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
76 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
76 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
77 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
77 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
78 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
78 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
79 | 79 | ||
80 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
80 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
81 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
81 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
82 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
82 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
83 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
83 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
84 | 84 | ||
85 | #ifndef __ASM__ |
85 | #ifndef __ASM__ |
86 | 86 | ||
87 | #include <arch/mm/tlb.h> |
87 | #include <arch/mm/tlb.h> |
88 | #include <mm/page.h> |
88 | #include <mm/page.h> |
89 | #include <arch/mm/frame.h> |
89 | #include <arch/mm/frame.h> |
90 | #include <arch/types.h> |
90 | #include <arch/types.h> |
91 | 91 | ||
92 | static inline int get_pt_flags(pte_t *pt, index_t i) |
92 | static inline int get_pt_flags(pte_t *pt, index_t i) |
93 | { |
93 | { |
94 | pte_t *p = &pt[i]; |
94 | pte_t *p = &pt[i]; |
95 | 95 | ||
96 | return ( |
96 | return ( |
97 | ((p->lo.c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) | |
97 | ((p->lo.c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) | |
98 | ((!p->lo.v)<<PAGE_PRESENT_SHIFT) | |
98 | ((!p->lo.v)<<PAGE_PRESENT_SHIFT) | |
99 | (1<<PAGE_USER_SHIFT) | |
99 | (1<<PAGE_USER_SHIFT) | |
100 | (1<<PAGE_READ_SHIFT) | |
100 | (1<<PAGE_READ_SHIFT) | |
101 | ((p->w)<<PAGE_WRITE_SHIFT) | |
101 | ((p->w)<<PAGE_WRITE_SHIFT) | |
102 | (1<<PAGE_EXEC_SHIFT) |
102 | (1<<PAGE_EXEC_SHIFT) |
103 | ); |
103 | ); |
104 | 104 | ||
105 | } |
105 | } |
106 | 106 | ||
107 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
107 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
108 | { |
108 | { |
109 | pte_t *p = &pt[i]; |
109 | pte_t *p = &pt[i]; |
110 | 110 | ||
111 | p->lo.c = (flags & PAGE_CACHEABLE) != 0 ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED; |
111 | p->lo.c = (flags & PAGE_CACHEABLE) != 0 ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED; |
112 | p->lo.v = !(flags & PAGE_NOT_PRESENT); |
112 | p->lo.v = !(flags & PAGE_NOT_PRESENT); |
113 | p->w = (flags & PAGE_WRITE) != 0; |
113 | p->w = (flags & PAGE_WRITE) != 0; |
114 | } |
114 | } |
115 | 115 | ||
116 | extern void page_arch_init(void); |
116 | extern void page_arch_init(void); |
117 | 117 | ||
118 | extern pte_t *PTL0; |
118 | extern pte_t *PTL0; |
119 | 119 | ||
120 | #endif /* __ASM__ */ |
120 | #endif /* __ASM__ */ |
121 | 121 | ||
122 | #endif |
122 | #endif |
123 | 123 |