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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 | ||