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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 | /** @addtogroup mips32mm |
29 | /** @addtogroup mips32mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef __mips32_TLB_H__ |
35 | #ifndef __mips32_TLB_H__ |
36 | #define __mips32_TLB_H__ |
36 | #define __mips32_TLB_H__ |
37 | 37 | ||
38 | #include <arch/exception.h> |
38 | #include <arch/exception.h> |
39 | #include <typedefs.h> |
39 | #include <typedefs.h> |
40 | 40 | ||
41 | #ifdef TLBCNT |
41 | #ifdef TLBCNT |
42 | # define TLB_ENTRY_COUNT TLBCNT |
42 | # define TLB_ENTRY_COUNT TLBCNT |
43 | #else |
43 | #else |
44 | # define TLB_ENTRY_COUNT 48 |
44 | # define TLB_ENTRY_COUNT 48 |
45 | #endif |
45 | #endif |
46 | 46 | ||
47 | #define TLB_WIRED 1 |
47 | #define TLB_WIRED 1 |
48 | #define TLB_KSTACK_WIRED_INDEX 0 |
48 | #define TLB_KSTACK_WIRED_INDEX 0 |
49 | 49 | ||
50 | #define TLB_PAGE_MASK_16K (0x3<<13) |
50 | #define TLB_PAGE_MASK_16K (0x3<<13) |
51 | 51 | ||
52 | #define PAGE_UNCACHED 2 |
52 | #define PAGE_UNCACHED 2 |
53 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
53 | #define PAGE_CACHEABLE_EXC_WRITE 5 |
54 | 54 | ||
55 | typedef union entry_lo entry_lo_t; |
55 | typedef union entry_lo entry_lo_t; |
56 | typedef union entry_hi entry_hi_t; |
56 | typedef union entry_hi entry_hi_t; |
57 | typedef union page_mask page_mask_t; |
57 | typedef union page_mask page_mask_t; |
58 | typedef union index tlb_index_t; |
58 | typedef union index tlb_index_t; |
59 | 59 | ||
60 | union entry_lo { |
60 | union entry_lo { |
61 | struct { |
61 | struct { |
62 | #ifdef BIG_ENDIAN |
62 | #ifdef BIG_ENDIAN |
63 | unsigned : 2; /* zero */ |
63 | unsigned : 2; /* zero */ |
64 | unsigned pfn : 24; /* frame number */ |
64 | unsigned pfn : 24; /* frame number */ |
65 | unsigned c : 3; /* cache coherency attribute */ |
65 | unsigned c : 3; /* cache coherency attribute */ |
66 | unsigned d : 1; /* dirty/write-protect bit */ |
66 | unsigned d : 1; /* dirty/write-protect bit */ |
67 | unsigned v : 1; /* valid bit */ |
67 | unsigned v : 1; /* valid bit */ |
68 | unsigned g : 1; /* global bit */ |
68 | unsigned g : 1; /* global bit */ |
69 | #else |
69 | #else |
70 | unsigned g : 1; /* global bit */ |
70 | unsigned g : 1; /* global bit */ |
71 | unsigned v : 1; /* valid bit */ |
71 | unsigned v : 1; /* valid bit */ |
72 | unsigned d : 1; /* dirty/write-protect bit */ |
72 | unsigned d : 1; /* dirty/write-protect bit */ |
73 | unsigned c : 3; /* cache coherency attribute */ |
73 | unsigned c : 3; /* cache coherency attribute */ |
74 | unsigned pfn : 24; /* frame number */ |
74 | unsigned pfn : 24; /* frame number */ |
75 | unsigned : 2; /* zero */ |
75 | unsigned : 2; /* zero */ |
76 | #endif |
76 | #endif |
77 | } __attribute__ ((packed)); |
77 | } __attribute__ ((packed)); |
78 | __u32 value; |
78 | uint32_t value; |
79 | }; |
79 | }; |
80 | 80 | ||
81 | /** Page Table Entry. */ |
81 | /** Page Table Entry. */ |
82 | struct pte { |
82 | struct pte { |
83 | unsigned g : 1; /**< Global bit. */ |
83 | unsigned g : 1; /**< Global bit. */ |
84 | unsigned p : 1; /**< Present bit. */ |
84 | unsigned p : 1; /**< Present bit. */ |
85 | unsigned d : 1; /**< Dirty bit. */ |
85 | unsigned d : 1; /**< Dirty bit. */ |
86 | unsigned cacheable : 1; /**< Cacheable bit. */ |
86 | unsigned cacheable : 1; /**< Cacheable bit. */ |
87 | unsigned : 1; /**< Unused. */ |
87 | unsigned : 1; /**< Unused. */ |
88 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
88 | unsigned soft_valid : 1; /**< Valid content even if not present. */ |
89 | unsigned pfn : 24; /**< Physical frame number. */ |
89 | unsigned pfn : 24; /**< Physical frame number. */ |
90 | unsigned w : 1; /**< Page writable bit. */ |
90 | unsigned w : 1; /**< Page writable bit. */ |
91 | unsigned a : 1; /**< Accessed bit. */ |
91 | unsigned a : 1; /**< Accessed bit. */ |
92 | }; |
92 | }; |
93 | 93 | ||
94 | union entry_hi { |
94 | union entry_hi { |
95 | struct { |
95 | struct { |
96 | #ifdef BIG_ENDIAN |
96 | #ifdef BIG_ENDIAN |
97 | unsigned vpn2 : 19; |
97 | unsigned vpn2 : 19; |
98 | unsigned : 5; |
98 | unsigned : 5; |
99 | unsigned asid : 8; |
99 | unsigned asid : 8; |
100 | #else |
100 | #else |
101 | unsigned asid : 8; |
101 | unsigned asid : 8; |
102 | unsigned : 5; |
102 | unsigned : 5; |
103 | unsigned vpn2 : 19; |
103 | unsigned vpn2 : 19; |
104 | #endif |
104 | #endif |
105 | } __attribute__ ((packed)); |
105 | } __attribute__ ((packed)); |
106 | __u32 value; |
106 | uint32_t value; |
107 | }; |
107 | }; |
108 | 108 | ||
109 | union page_mask { |
109 | union page_mask { |
110 | struct { |
110 | struct { |
111 | #ifdef BIG_ENDIAN |
111 | #ifdef BIG_ENDIAN |
112 | unsigned : 7; |
112 | unsigned : 7; |
113 | unsigned mask : 12; |
113 | unsigned mask : 12; |
114 | unsigned : 13; |
114 | unsigned : 13; |
115 | #else |
115 | #else |
116 | unsigned : 13; |
116 | unsigned : 13; |
117 | unsigned mask : 12; |
117 | unsigned mask : 12; |
118 | unsigned : 7; |
118 | unsigned : 7; |
119 | #endif |
119 | #endif |
120 | } __attribute__ ((packed)); |
120 | } __attribute__ ((packed)); |
121 | __u32 value; |
121 | uint32_t value; |
122 | }; |
122 | }; |
123 | 123 | ||
124 | union index { |
124 | union index { |
125 | struct { |
125 | struct { |
126 | #ifdef BIG_ENDIAN |
126 | #ifdef BIG_ENDIAN |
127 | unsigned p : 1; |
127 | unsigned p : 1; |
128 | unsigned : 27; |
128 | unsigned : 27; |
129 | unsigned index : 4; |
129 | unsigned index : 4; |
130 | #else |
130 | #else |
131 | unsigned index : 4; |
131 | unsigned index : 4; |
132 | unsigned : 27; |
132 | unsigned : 27; |
133 | unsigned p : 1; |
133 | unsigned p : 1; |
134 | #endif |
134 | #endif |
135 | } __attribute__ ((packed)); |
135 | } __attribute__ ((packed)); |
136 | __u32 value; |
136 | uint32_t value; |
137 | }; |
137 | }; |
138 | 138 | ||
139 | /** Probe TLB for Matching Entry |
139 | /** Probe TLB for Matching Entry |
140 | * |
140 | * |
141 | * Probe TLB for Matching Entry. |
141 | * Probe TLB for Matching Entry. |
142 | */ |
142 | */ |
143 | static inline void tlbp(void) |
143 | static inline void tlbp(void) |
144 | { |
144 | { |
145 | __asm__ volatile ("tlbp\n\t"); |
145 | __asm__ volatile ("tlbp\n\t"); |
146 | } |
146 | } |
147 | 147 | ||
148 | 148 | ||
149 | /** Read Indexed TLB Entry |
149 | /** Read Indexed TLB Entry |
150 | * |
150 | * |
151 | * Read Indexed TLB Entry. |
151 | * Read Indexed TLB Entry. |
152 | */ |
152 | */ |
153 | static inline void tlbr(void) |
153 | static inline void tlbr(void) |
154 | { |
154 | { |
155 | __asm__ volatile ("tlbr\n\t"); |
155 | __asm__ volatile ("tlbr\n\t"); |
156 | } |
156 | } |
157 | 157 | ||
158 | /** Write Indexed TLB Entry |
158 | /** Write Indexed TLB Entry |
159 | * |
159 | * |
160 | * Write Indexed TLB Entry. |
160 | * Write Indexed TLB Entry. |
161 | */ |
161 | */ |
162 | static inline void tlbwi(void) |
162 | static inline void tlbwi(void) |
163 | { |
163 | { |
164 | __asm__ volatile ("tlbwi\n\t"); |
164 | __asm__ volatile ("tlbwi\n\t"); |
165 | } |
165 | } |
166 | 166 | ||
167 | /** Write Random TLB Entry |
167 | /** Write Random TLB Entry |
168 | * |
168 | * |
169 | * Write Random TLB Entry. |
169 | * Write Random TLB Entry. |
170 | */ |
170 | */ |
171 | static inline void tlbwr(void) |
171 | static inline void tlbwr(void) |
172 | { |
172 | { |
173 | __asm__ volatile ("tlbwr\n\t"); |
173 | __asm__ volatile ("tlbwr\n\t"); |
174 | } |
174 | } |
175 | 175 | ||
176 | #define tlb_invalidate(asid) tlb_invalidate_asid(asid) |
176 | #define tlb_invalidate(asid) tlb_invalidate_asid(asid) |
177 | 177 | ||
178 | extern void tlb_invalid(istate_t *istate); |
178 | extern void tlb_invalid(istate_t *istate); |
179 | extern void tlb_refill(istate_t *istate); |
179 | extern void tlb_refill(istate_t *istate); |
180 | extern void tlb_modified(istate_t *istate); |
180 | extern void tlb_modified(istate_t *istate); |
181 | 181 | ||
182 | #endif |
182 | #endif |
183 | 183 | ||
184 | /** @} |
184 | /** @} |
185 | */ |
185 | */ |
186 | 186 |