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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_TLB_H__ |
29 | #ifndef __mips32_TLB_H__ |
30 | #define __mips32_TLB_H__ |
30 | #define __mips32_TLB_H__ |
31 | 31 | ||
32 | #include <arch/exception.h> |
32 | #include <arch/exception.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | 34 | ||
35 | #ifdef TLBCNT |
35 | #ifdef TLBCNT |
36 | # define TLB_ENTRY_COUNT TLBCNT |
36 | # define TLB_ENTRY_COUNT TLBCNT |
37 | #else |
37 | #else |
38 | # define TLB_ENTRY_COUNT 48 |
38 | # define TLB_ENTRY_COUNT 48 |
39 | #endif |
39 | #endif |
40 | 40 | ||
41 | #define TLB_WIRED 1 |
41 | #define TLB_WIRED 1 |
42 | #define TLB_KSTACK_WIRED_INDEX 0 |
42 | #define TLB_KSTACK_WIRED_INDEX 0 |
43 | 43 | ||
44 | #define TLB_PAGE_MASK_16K (0x3<<13) |
44 | #define TLB_PAGE_MASK_16K (0x3<<13) |
45 | 45 | ||
46 | #define PAGE_UNCACHED 2 |
46 | #define PAGE_UNCACHED 2 |
47 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
47 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
48 | 48 | ||
49 | typedef union entry_lo entry_lo_t; |
49 | typedef union entry_lo entry_lo_t; |
50 | typedef union entry_hi entry_hi_t; |
50 | typedef union entry_hi entry_hi_t; |
51 | typedef union page_mask page_mask_t; |
51 | typedef union page_mask page_mask_t; |
52 | typedef union index tlb_index_t; |
52 | typedef union index tlb_index_t; |
53 | 53 | ||
54 | union entry_lo { |
54 | union entry_lo { |
55 | struct { |
55 | struct { |
- | 56 | #ifdef BIG_ENDIAN |
|
- | 57 | unsigned : 2; /* zero */ |
|
- | 58 | unsigned pfn : 24; /* frame number */ |
|
- | 59 | unsigned c : 3; /* cache coherency attribute */ |
|
- | 60 | unsigned d : 1; /* dirty/write-protect bit */ |
|
- | 61 | unsigned v : 1; /* valid bit */ |
|
- | 62 | unsigned g : 1; /* global bit */ |
|
- | 63 | #else |
|
56 | unsigned g : 1; /* global bit */ |
64 | unsigned g : 1; /* global bit */ |
57 | unsigned v : 1; /* valid bit */ |
65 | unsigned v : 1; /* valid bit */ |
58 | unsigned d : 1; /* dirty/write-protect bit */ |
66 | unsigned d : 1; /* dirty/write-protect bit */ |
59 | unsigned c : 3; /* cache coherency attribute */ |
67 | unsigned c : 3; /* cache coherency attribute */ |
60 | unsigned pfn : 24; /* frame number */ |
68 | unsigned pfn : 24; /* frame number */ |
61 | unsigned : 2; /* zero */ |
69 | unsigned : 2; /* zero */ |
- | 70 | #endif |
|
62 | } __attribute__ ((packed)); |
71 | } __attribute__ ((packed)); |
63 | __u32 value; |
72 | __u32 value; |
64 | }; |
73 | }; |
65 | 74 | ||
66 | /** Page Table Entry. */ |
75 | /** Page Table Entry. */ |
67 | struct pte { |
76 | struct pte { |
- | 77 | #ifdef BIG_ENDIAN |
|
- | 78 | unsigned a : 1; /**< Accessed bit. */ |
|
- | 79 | unsigned w : 1; /**< Page writable bit. */ |
|
- | 80 | unsigned pfn : 24; /**< Physical frame number. */ |
|
- | 81 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
|
- | 82 | unsigned : 1; /**< Unused. */ |
|
- | 83 | unsigned cacheable : 1; /**< Cacheable bit. */ |
|
- | 84 | unsigned d : 1; /**< Dirty bit. */ |
|
- | 85 | unsigned p : 1; /**< Present bit. */ |
|
- | 86 | unsigned g : 1; /**< Global bit. */ |
|
- | 87 | #else |
|
68 | unsigned g : 1; /**< Global bit. */ |
88 | unsigned g : 1; /**< Global bit. */ |
69 | unsigned p : 1; /**< Present bit. */ |
89 | unsigned p : 1; /**< Present bit. */ |
70 | unsigned d : 1; /**< Dirty bit. */ |
90 | unsigned d : 1; /**< Dirty bit. */ |
71 | unsigned cacheable : 1; /**< Cacheable bit. */ |
91 | unsigned cacheable : 1; /**< Cacheable bit. */ |
72 | unsigned : 1; /**< Unused. */ |
92 | unsigned : 1; /**< Unused. */ |
73 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
93 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
74 | unsigned pfn : 24; /**< Physical frame number. */ |
94 | unsigned pfn : 24; /**< Physical frame number. */ |
75 | unsigned w : 1; /**< Page writable bit. */ |
95 | unsigned w : 1; /**< Page writable bit. */ |
76 | unsigned a : 1; /**< Accessed bit. */ |
96 | unsigned a : 1; /**< Accessed bit. */ |
- | 97 | #endif |
|
77 | }; |
98 | }; |
78 | 99 | ||
79 | union entry_hi { |
100 | union entry_hi { |
80 | struct { |
101 | struct { |
- | 102 | #ifdef BIG_ENDIAN |
|
- | 103 | unsigned vpn2 : 19; |
|
- | 104 | unsigned : 5; |
|
- | 105 | unsigned asid : 8; |
|
- | 106 | #else |
|
81 | unsigned asid : 8; |
107 | unsigned asid : 8; |
82 | unsigned : 5; |
108 | unsigned : 5; |
83 | unsigned vpn2 : 19; |
109 | unsigned vpn2 : 19; |
- | 110 | #endif |
|
84 | } __attribute__ ((packed)); |
111 | } __attribute__ ((packed)); |
85 | __u32 value; |
112 | __u32 value; |
86 | }; |
113 | }; |
87 | 114 | ||
88 | union page_mask { |
115 | union page_mask { |
89 | struct { |
116 | struct { |
- | 117 | #ifdef BIG_ENDIAN |
|
- | 118 | unsigned : 7; |
|
- | 119 | unsigned mask : 12; |
|
- | 120 | unsigned : 13; |
|
- | 121 | #else |
|
90 | unsigned : 13; |
122 | unsigned : 13; |
91 | unsigned mask : 12; |
123 | unsigned mask : 12; |
92 | unsigned : 7; |
124 | unsigned : 7; |
- | 125 | #endif |
|
93 | } __attribute__ ((packed)); |
126 | } __attribute__ ((packed)); |
94 | __u32 value; |
127 | __u32 value; |
95 | }; |
128 | }; |
96 | 129 | ||
97 | union index { |
130 | union index { |
98 | struct { |
131 | struct { |
- | 132 | #ifdef BIG_ENDIAN |
|
- | 133 | unsigned p : 1; |
|
- | 134 | unsigned : 27; |
|
- | 135 | unsigned index : 4; |
|
- | 136 | #else |
|
99 | unsigned index : 4; |
137 | unsigned index : 4; |
100 | unsigned : 27; |
138 | unsigned : 27; |
101 | unsigned p : 1; |
139 | unsigned p : 1; |
- | 140 | #endif |
|
102 | } __attribute__ ((packed)); |
141 | } __attribute__ ((packed)); |
103 | __u32 value; |
142 | __u32 value; |
104 | }; |
143 | }; |
105 | 144 | ||
106 | /** Probe TLB for Matching Entry |
145 | /** Probe TLB for Matching Entry |
107 | * |
146 | * |
108 | * Probe TLB for Matching Entry. |
147 | * Probe TLB for Matching Entry. |
109 | */ |
148 | */ |
110 | static inline void tlbp(void) |
149 | static inline void tlbp(void) |
111 | { |
150 | { |
112 | __asm__ volatile ("tlbp\n\t"); |
151 | __asm__ volatile ("tlbp\n\t"); |
113 | } |
152 | } |
114 | 153 | ||
115 | 154 | ||
116 | /** Read Indexed TLB Entry |
155 | /** Read Indexed TLB Entry |
117 | * |
156 | * |
118 | * Read Indexed TLB Entry. |
157 | * Read Indexed TLB Entry. |
119 | */ |
158 | */ |
120 | static inline void tlbr(void) |
159 | static inline void tlbr(void) |
121 | { |
160 | { |
122 | __asm__ volatile ("tlbr\n\t"); |
161 | __asm__ volatile ("tlbr\n\t"); |
123 | } |
162 | } |
124 | 163 | ||
125 | /** Write Indexed TLB Entry |
164 | /** Write Indexed TLB Entry |
126 | * |
165 | * |
127 | * Write Indexed TLB Entry. |
166 | * Write Indexed TLB Entry. |
128 | */ |
167 | */ |
129 | static inline void tlbwi(void) |
168 | static inline void tlbwi(void) |
130 | { |
169 | { |
131 | __asm__ volatile ("tlbwi\n\t"); |
170 | __asm__ volatile ("tlbwi\n\t"); |
132 | } |
171 | } |
133 | 172 | ||
134 | /** Write Random TLB Entry |
173 | /** Write Random TLB Entry |
135 | * |
174 | * |
136 | * Write Random TLB Entry. |
175 | * Write Random TLB Entry. |
137 | */ |
176 | */ |
138 | static inline void tlbwr(void) |
177 | static inline void tlbwr(void) |
139 | { |
178 | { |
140 | __asm__ volatile ("tlbwr\n\t"); |
179 | __asm__ volatile ("tlbwr\n\t"); |
141 | } |
180 | } |
142 | 181 | ||
143 | #define tlb_invalidate(asid) tlb_invalidate_asid(asid) |
182 | #define tlb_invalidate(asid) tlb_invalidate_asid(asid) |
144 | 183 | ||
145 | extern void tlb_invalid(struct exception_regdump *pstate); |
184 | extern void tlb_invalid(struct exception_regdump *pstate); |
146 | extern void tlb_refill(struct exception_regdump *pstate); |
185 | extern void tlb_refill(struct exception_regdump *pstate); |
147 | extern void tlb_modified(struct exception_regdump *pstate); |
186 | extern void tlb_modified(struct exception_regdump *pstate); |
148 | 187 | ||
149 | #endif |
188 | #endif |
150 | 189 |