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1 | # |
1 | # |
2 | # Copyright (C) 2005 Jakub Jermar |
2 | # Copyright (C) 2005 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 | /** |
29 | /** |
30 | * This file contains kernel trap table. |
30 | * This file contains kernel trap table. |
31 | */ |
31 | */ |
32 | 32 | ||
33 | .register %g2, #scratch |
33 | .register %g2, #scratch |
34 | .register %g3, #scratch |
34 | .register %g3, #scratch |
35 | 35 | ||
36 | .text |
36 | .text |
37 | 37 | ||
38 | #include <arch/trap/trap_table.h> |
38 | #include <arch/trap/trap_table.h> |
39 | #include <arch/trap/regwin.h> |
39 | #include <arch/trap/regwin.h> |
40 | #include <arch/trap/interrupt.h> |
40 | #include <arch/trap/interrupt.h> |
41 | #include <arch/trap/exception.h> |
41 | #include <arch/trap/exception.h> |
- | 42 | #include <arch/trap/syscall.h> |
|
42 | #include <arch/trap/mmu.h> |
43 | #include <arch/trap/mmu.h> |
43 | #include <arch/mm/mmu.h> |
44 | #include <arch/mm/mmu.h> |
44 | #include <arch/mm/page.h> |
45 | #include <arch/mm/page.h> |
45 | #include <arch/stack.h> |
46 | #include <arch/stack.h> |
46 | #include <arch/regdef.h> |
47 | #include <arch/regdef.h> |
47 | 48 | ||
48 | #define TABLE_SIZE TRAP_TABLE_SIZE |
49 | #define TABLE_SIZE TRAP_TABLE_SIZE |
49 | #define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
50 | #define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
50 | 51 | ||
51 | /* |
52 | /* |
52 | * Kernel trap table. |
53 | * Kernel trap table. |
53 | */ |
54 | */ |
54 | .align TABLE_SIZE |
55 | .align TABLE_SIZE |
55 | .global trap_table |
56 | .global trap_table |
56 | trap_table: |
57 | trap_table: |
57 | 58 | ||
58 | /* TT = 0x08, TL = 0, instruction_access_exception */ |
59 | /* TT = 0x08, TL = 0, instruction_access_exception */ |
59 | .org trap_table + TT_INSTRUCTION_ACCESS_EXCEPTION*ENTRY_SIZE |
60 | .org trap_table + TT_INSTRUCTION_ACCESS_EXCEPTION*ENTRY_SIZE |
60 | .global instruction_access_exception |
61 | .global instruction_access_exception |
61 | instruction_access_exception: |
62 | instruction_access_exception: |
62 | PREEMPTIBLE_HANDLER do_instruction_access_exc |
63 | PREEMPTIBLE_HANDLER do_instruction_access_exc |
63 | 64 | ||
64 | /* TT = 0x10, TL = 0, illegal_instruction */ |
65 | /* TT = 0x10, TL = 0, illegal_instruction */ |
65 | .org trap_table + TT_ILLEGAL_INSTRUCTION*ENTRY_SIZE |
66 | .org trap_table + TT_ILLEGAL_INSTRUCTION*ENTRY_SIZE |
66 | .global illegal_instruction |
67 | .global illegal_instruction |
67 | illegal_instruction: |
68 | illegal_instruction: |
68 | PREEMPTIBLE_HANDLER do_illegal_instruction |
69 | PREEMPTIBLE_HANDLER do_illegal_instruction |
69 | 70 | ||
70 | /* TT = 0x24, TL = 0, clean_window handler */ |
71 | /* TT = 0x24, TL = 0, clean_window handler */ |
71 | .org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
72 | .org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
72 | .global clean_window_handler |
73 | .global clean_window_handler |
73 | clean_window_handler: |
74 | clean_window_handler: |
74 | CLEAN_WINDOW_HANDLER |
75 | CLEAN_WINDOW_HANDLER |
75 | 76 | ||
76 | /* TT = 0x32, TL = 0, data_access_error */ |
77 | /* TT = 0x32, TL = 0, data_access_error */ |
77 | .org trap_table + TT_DATA_ACCESS_ERROR*ENTRY_SIZE |
78 | .org trap_table + TT_DATA_ACCESS_ERROR*ENTRY_SIZE |
78 | .global data_access_error |
79 | .global data_access_error |
79 | data_access_error: |
80 | data_access_error: |
80 | PREEMPTIBLE_HANDLER do_data_access_error |
81 | PREEMPTIBLE_HANDLER do_data_access_error |
81 | 82 | ||
82 | /* TT = 0x34, TL = 0, mem_address_not_aligned */ |
83 | /* TT = 0x34, TL = 0, mem_address_not_aligned */ |
83 | .org trap_table + TT_MEM_ADDRESS_NOT_ALIGNED*ENTRY_SIZE |
84 | .org trap_table + TT_MEM_ADDRESS_NOT_ALIGNED*ENTRY_SIZE |
84 | .global mem_address_not_aligned |
85 | .global mem_address_not_aligned |
85 | mem_address_not_aligned: |
86 | mem_address_not_aligned: |
86 | PREEMPTIBLE_HANDLER do_mem_address_not_aligned |
87 | PREEMPTIBLE_HANDLER do_mem_address_not_aligned |
87 | 88 | ||
88 | /* TT = 0x41, TL = 0, interrupt_level_1 handler */ |
89 | /* TT = 0x41, TL = 0, interrupt_level_1 handler */ |
89 | .org trap_table + TT_INTERRUPT_LEVEL_1*ENTRY_SIZE |
90 | .org trap_table + TT_INTERRUPT_LEVEL_1*ENTRY_SIZE |
90 | .global interrupt_level_1_handler |
91 | .global interrupt_level_1_handler |
91 | interrupt_level_1_handler: |
92 | interrupt_level_1_handler: |
92 | INTERRUPT_LEVEL_N_HANDLER 1 |
93 | INTERRUPT_LEVEL_N_HANDLER 1 |
93 | 94 | ||
94 | /* TT = 0x42, TL = 0, interrupt_level_2 handler */ |
95 | /* TT = 0x42, TL = 0, interrupt_level_2 handler */ |
95 | .org trap_table + TT_INTERRUPT_LEVEL_2*ENTRY_SIZE |
96 | .org trap_table + TT_INTERRUPT_LEVEL_2*ENTRY_SIZE |
96 | .global interrupt_level_2_handler |
97 | .global interrupt_level_2_handler |
97 | interrupt_level_2_handler: |
98 | interrupt_level_2_handler: |
98 | INTERRUPT_LEVEL_N_HANDLER 2 |
99 | INTERRUPT_LEVEL_N_HANDLER 2 |
99 | 100 | ||
100 | /* TT = 0x43, TL = 0, interrupt_level_3 handler */ |
101 | /* TT = 0x43, TL = 0, interrupt_level_3 handler */ |
101 | .org trap_table + TT_INTERRUPT_LEVEL_3*ENTRY_SIZE |
102 | .org trap_table + TT_INTERRUPT_LEVEL_3*ENTRY_SIZE |
102 | .global interrupt_level_3_handler |
103 | .global interrupt_level_3_handler |
103 | interrupt_level_3_handler: |
104 | interrupt_level_3_handler: |
104 | INTERRUPT_LEVEL_N_HANDLER 3 |
105 | INTERRUPT_LEVEL_N_HANDLER 3 |
105 | 106 | ||
106 | /* TT = 0x44, TL = 0, interrupt_level_4 handler */ |
107 | /* TT = 0x44, TL = 0, interrupt_level_4 handler */ |
107 | .org trap_table + TT_INTERRUPT_LEVEL_4*ENTRY_SIZE |
108 | .org trap_table + TT_INTERRUPT_LEVEL_4*ENTRY_SIZE |
108 | .global interrupt_level_4_handler |
109 | .global interrupt_level_4_handler |
109 | interrupt_level_4_handler: |
110 | interrupt_level_4_handler: |
110 | INTERRUPT_LEVEL_N_HANDLER 4 |
111 | INTERRUPT_LEVEL_N_HANDLER 4 |
111 | 112 | ||
112 | /* TT = 0x45, TL = 0, interrupt_level_5 handler */ |
113 | /* TT = 0x45, TL = 0, interrupt_level_5 handler */ |
113 | .org trap_table + TT_INTERRUPT_LEVEL_5*ENTRY_SIZE |
114 | .org trap_table + TT_INTERRUPT_LEVEL_5*ENTRY_SIZE |
114 | .global interrupt_level_5_handler |
115 | .global interrupt_level_5_handler |
115 | interrupt_level_5_handler: |
116 | interrupt_level_5_handler: |
116 | INTERRUPT_LEVEL_N_HANDLER 5 |
117 | INTERRUPT_LEVEL_N_HANDLER 5 |
117 | 118 | ||
118 | /* TT = 0x46, TL = 0, interrupt_level_6 handler */ |
119 | /* TT = 0x46, TL = 0, interrupt_level_6 handler */ |
119 | .org trap_table + TT_INTERRUPT_LEVEL_6*ENTRY_SIZE |
120 | .org trap_table + TT_INTERRUPT_LEVEL_6*ENTRY_SIZE |
120 | .global interrupt_level_6_handler |
121 | .global interrupt_level_6_handler |
121 | interrupt_level_6_handler: |
122 | interrupt_level_6_handler: |
122 | INTERRUPT_LEVEL_N_HANDLER 6 |
123 | INTERRUPT_LEVEL_N_HANDLER 6 |
123 | 124 | ||
124 | /* TT = 0x47, TL = 0, interrupt_level_7 handler */ |
125 | /* TT = 0x47, TL = 0, interrupt_level_7 handler */ |
125 | .org trap_table + TT_INTERRUPT_LEVEL_7*ENTRY_SIZE |
126 | .org trap_table + TT_INTERRUPT_LEVEL_7*ENTRY_SIZE |
126 | .global interrupt_level_7_handler |
127 | .global interrupt_level_7_handler |
127 | interrupt_level_7_handler: |
128 | interrupt_level_7_handler: |
128 | INTERRUPT_LEVEL_N_HANDLER 7 |
129 | INTERRUPT_LEVEL_N_HANDLER 7 |
129 | 130 | ||
130 | /* TT = 0x48, TL = 0, interrupt_level_8 handler */ |
131 | /* TT = 0x48, TL = 0, interrupt_level_8 handler */ |
131 | .org trap_table + TT_INTERRUPT_LEVEL_8*ENTRY_SIZE |
132 | .org trap_table + TT_INTERRUPT_LEVEL_8*ENTRY_SIZE |
132 | .global interrupt_level_8_handler |
133 | .global interrupt_level_8_handler |
133 | interrupt_level_8_handler: |
134 | interrupt_level_8_handler: |
134 | INTERRUPT_LEVEL_N_HANDLER 8 |
135 | INTERRUPT_LEVEL_N_HANDLER 8 |
135 | 136 | ||
136 | /* TT = 0x49, TL = 0, interrupt_level_9 handler */ |
137 | /* TT = 0x49, TL = 0, interrupt_level_9 handler */ |
137 | .org trap_table + TT_INTERRUPT_LEVEL_9*ENTRY_SIZE |
138 | .org trap_table + TT_INTERRUPT_LEVEL_9*ENTRY_SIZE |
138 | .global interrupt_level_9_handler |
139 | .global interrupt_level_9_handler |
139 | interrupt_level_9_handler: |
140 | interrupt_level_9_handler: |
140 | INTERRUPT_LEVEL_N_HANDLER 9 |
141 | INTERRUPT_LEVEL_N_HANDLER 9 |
141 | 142 | ||
142 | /* TT = 0x4a, TL = 0, interrupt_level_10 handler */ |
143 | /* TT = 0x4a, TL = 0, interrupt_level_10 handler */ |
143 | .org trap_table + TT_INTERRUPT_LEVEL_10*ENTRY_SIZE |
144 | .org trap_table + TT_INTERRUPT_LEVEL_10*ENTRY_SIZE |
144 | .global interrupt_level_10_handler |
145 | .global interrupt_level_10_handler |
145 | interrupt_level_10_handler: |
146 | interrupt_level_10_handler: |
146 | INTERRUPT_LEVEL_N_HANDLER 10 |
147 | INTERRUPT_LEVEL_N_HANDLER 10 |
147 | 148 | ||
148 | /* TT = 0x4b, TL = 0, interrupt_level_11 handler */ |
149 | /* TT = 0x4b, TL = 0, interrupt_level_11 handler */ |
149 | .org trap_table + TT_INTERRUPT_LEVEL_11*ENTRY_SIZE |
150 | .org trap_table + TT_INTERRUPT_LEVEL_11*ENTRY_SIZE |
150 | .global interrupt_level_11_handler |
151 | .global interrupt_level_11_handler |
151 | interrupt_level_11_handler: |
152 | interrupt_level_11_handler: |
152 | INTERRUPT_LEVEL_N_HANDLER 11 |
153 | INTERRUPT_LEVEL_N_HANDLER 11 |
153 | 154 | ||
154 | /* TT = 0x4c, TL = 0, interrupt_level_12 handler */ |
155 | /* TT = 0x4c, TL = 0, interrupt_level_12 handler */ |
155 | .org trap_table + TT_INTERRUPT_LEVEL_12*ENTRY_SIZE |
156 | .org trap_table + TT_INTERRUPT_LEVEL_12*ENTRY_SIZE |
156 | .global interrupt_level_12_handler |
157 | .global interrupt_level_12_handler |
157 | interrupt_level_12_handler: |
158 | interrupt_level_12_handler: |
158 | INTERRUPT_LEVEL_N_HANDLER 12 |
159 | INTERRUPT_LEVEL_N_HANDLER 12 |
159 | 160 | ||
160 | /* TT = 0x4d, TL = 0, interrupt_level_13 handler */ |
161 | /* TT = 0x4d, TL = 0, interrupt_level_13 handler */ |
161 | .org trap_table + TT_INTERRUPT_LEVEL_13*ENTRY_SIZE |
162 | .org trap_table + TT_INTERRUPT_LEVEL_13*ENTRY_SIZE |
162 | .global interrupt_level_13_handler |
163 | .global interrupt_level_13_handler |
163 | interrupt_level_13_handler: |
164 | interrupt_level_13_handler: |
164 | INTERRUPT_LEVEL_N_HANDLER 13 |
165 | INTERRUPT_LEVEL_N_HANDLER 13 |
165 | 166 | ||
166 | /* TT = 0x4e, TL = 0, interrupt_level_14 handler */ |
167 | /* TT = 0x4e, TL = 0, interrupt_level_14 handler */ |
167 | .org trap_table + TT_INTERRUPT_LEVEL_14*ENTRY_SIZE |
168 | .org trap_table + TT_INTERRUPT_LEVEL_14*ENTRY_SIZE |
168 | .global interrupt_level_14_handler |
169 | .global interrupt_level_14_handler |
169 | interrupt_level_14_handler: |
170 | interrupt_level_14_handler: |
170 | INTERRUPT_LEVEL_N_HANDLER 14 |
171 | INTERRUPT_LEVEL_N_HANDLER 14 |
171 | 172 | ||
172 | /* TT = 0x4f, TL = 0, interrupt_level_15 handler */ |
173 | /* TT = 0x4f, TL = 0, interrupt_level_15 handler */ |
173 | .org trap_table + TT_INTERRUPT_LEVEL_15*ENTRY_SIZE |
174 | .org trap_table + TT_INTERRUPT_LEVEL_15*ENTRY_SIZE |
174 | .global interrupt_level_15_handler |
175 | .global interrupt_level_15_handler |
175 | interrupt_level_15_handler: |
176 | interrupt_level_15_handler: |
176 | INTERRUPT_LEVEL_N_HANDLER 15 |
177 | INTERRUPT_LEVEL_N_HANDLER 15 |
177 | 178 | ||
178 | /* TT = 0x60, TL = 0, interrupt_vector_trap handler */ |
179 | /* TT = 0x60, TL = 0, interrupt_vector_trap handler */ |
179 | .org trap_table + TT_INTERRUPT_VECTOR_TRAP*ENTRY_SIZE |
180 | .org trap_table + TT_INTERRUPT_VECTOR_TRAP*ENTRY_SIZE |
180 | .global interrupt_vector_trap_handler |
181 | .global interrupt_vector_trap_handler |
181 | interrupt_vector_trap_handler: |
182 | interrupt_vector_trap_handler: |
182 | INTERRUPT_VECTOR_TRAP_HANDLER |
183 | INTERRUPT_VECTOR_TRAP_HANDLER |
183 | 184 | ||
184 | /* TT = 0x64, TL = 0, fast_instruction_access_MMU_miss */ |
185 | /* TT = 0x64, TL = 0, fast_instruction_access_MMU_miss */ |
185 | .org trap_table + TT_FAST_INSTRUCTION_ACCESS_MMU_MISS*ENTRY_SIZE |
186 | .org trap_table + TT_FAST_INSTRUCTION_ACCESS_MMU_MISS*ENTRY_SIZE |
186 | .global fast_instruction_access_mmu_miss_handler |
187 | .global fast_instruction_access_mmu_miss_handler |
187 | fast_instruction_access_mmu_miss_handler: |
188 | fast_instruction_access_mmu_miss_handler: |
188 | FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER |
189 | FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER |
189 | 190 | ||
190 | /* TT = 0x68, TL = 0, fast_data_access_MMU_miss */ |
191 | /* TT = 0x68, TL = 0, fast_data_access_MMU_miss */ |
191 | .org trap_table + TT_FAST_DATA_ACCESS_MMU_MISS*ENTRY_SIZE |
192 | .org trap_table + TT_FAST_DATA_ACCESS_MMU_MISS*ENTRY_SIZE |
192 | .global fast_data_access_mmu_miss_handler |
193 | .global fast_data_access_mmu_miss_handler |
193 | fast_data_access_mmu_miss_handler: |
194 | fast_data_access_mmu_miss_handler: |
194 | FAST_DATA_ACCESS_MMU_MISS_HANDLER |
195 | FAST_DATA_ACCESS_MMU_MISS_HANDLER |
195 | 196 | ||
196 | /* TT = 0x6c, TL = 0, fast_data_access_protection */ |
197 | /* TT = 0x6c, TL = 0, fast_data_access_protection */ |
197 | .org trap_table + TT_FAST_DATA_ACCESS_PROTECTION*ENTRY_SIZE |
198 | .org trap_table + TT_FAST_DATA_ACCESS_PROTECTION*ENTRY_SIZE |
198 | .global fast_data_access_protection_handler |
199 | .global fast_data_access_protection_handler |
199 | fast_data_access_protection_handler: |
200 | fast_data_access_protection_handler: |
200 | FAST_DATA_ACCESS_PROTECTION_HANDLER |
201 | FAST_DATA_ACCESS_PROTECTION_HANDLER |
201 | 202 | ||
202 | /* TT = 0x80, TL = 0, spill_0_normal handler */ |
203 | /* TT = 0x80, TL = 0, spill_0_normal handler */ |
203 | .org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
204 | .org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
204 | .global spill_0_normal |
205 | .global spill_0_normal |
205 | spill_0_normal: |
206 | spill_0_normal: |
206 | SPILL_NORMAL_HANDLER_KERNEL |
207 | SPILL_NORMAL_HANDLER_KERNEL |
207 | 208 | ||
208 | /* TT = 0x84, TL = 0, spill_1_normal handler */ |
209 | /* TT = 0x84, TL = 0, spill_1_normal handler */ |
209 | .org trap_table + TT_SPILL_1_NORMAL*ENTRY_SIZE |
210 | .org trap_table + TT_SPILL_1_NORMAL*ENTRY_SIZE |
210 | .global spill_1_normal |
211 | .global spill_1_normal |
211 | spill_1_normal: |
212 | spill_1_normal: |
212 | SPILL_NORMAL_HANDLER_USERSPACE |
213 | SPILL_NORMAL_HANDLER_USERSPACE |
213 | 214 | ||
214 | /* TT = 0x88, TL = 0, spill_2_normal handler */ |
215 | /* TT = 0x88, TL = 0, spill_2_normal handler */ |
215 | .org trap_table + TT_SPILL_2_NORMAL*ENTRY_SIZE |
216 | .org trap_table + TT_SPILL_2_NORMAL*ENTRY_SIZE |
216 | .global spill_2_normal |
217 | .global spill_2_normal |
217 | spill_2_normal: |
218 | spill_2_normal: |
218 | SPILL_TO_USPACE_WINDOW_BUFFER |
219 | SPILL_TO_USPACE_WINDOW_BUFFER |
219 | 220 | ||
220 | /* TT = 0xc0, TL = 0, fill_0_normal handler */ |
221 | /* TT = 0xc0, TL = 0, fill_0_normal handler */ |
221 | .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
222 | .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
222 | .global fill_0_normal |
223 | .global fill_0_normal |
223 | fill_0_normal: |
224 | fill_0_normal: |
224 | FILL_NORMAL_HANDLER_KERNEL |
225 | FILL_NORMAL_HANDLER_KERNEL |
225 | 226 | ||
226 | /* TT = 0xc4, TL = 0, fill_1_normal handler */ |
227 | /* TT = 0xc4, TL = 0, fill_1_normal handler */ |
227 | .org trap_table + TT_FILL_1_NORMAL*ENTRY_SIZE |
228 | .org trap_table + TT_FILL_1_NORMAL*ENTRY_SIZE |
228 | .global fill_1_normal |
229 | .global fill_1_normal |
229 | fill_1_normal: |
230 | fill_1_normal: |
230 | FILL_NORMAL_HANDLER_USERSPACE |
231 | FILL_NORMAL_HANDLER_USERSPACE |
231 | 232 | ||
- | 233 | /* TT = 0x100, TL = 0, trap_instruction_0 */ |
|
- | 234 | .org trap_table + TT_TRAP_INSTRUCTION(0)*ENTRY_SIZE |
|
- | 235 | .global trap_instruction_0 |
|
- | 236 | trap_instruction_0: |
|
- | 237 | TRAP_INSTRUCTION 0 |
|
- | 238 | ||
- | 239 | /* TT = 0x101, TL = 0, trap_instruction_1 */ |
|
- | 240 | .org trap_table + TT_TRAP_INSTRUCTION(1)*ENTRY_SIZE |
|
- | 241 | .global trap_instruction_1 |
|
- | 242 | trap_instruction_1: |
|
- | 243 | TRAP_INSTRUCTION 1 |
|
- | 244 | ||
- | 245 | /* TT = 0x102, TL = 0, trap_instruction_2 */ |
|
- | 246 | .org trap_table + TT_TRAP_INSTRUCTION(2)*ENTRY_SIZE |
|
- | 247 | .global trap_instruction_2 |
|
- | 248 | trap_instruction_2: |
|
- | 249 | TRAP_INSTRUCTION 2 |
|
- | 250 | ||
- | 251 | /* TT = 0x103, TL = 0, trap_instruction_3 */ |
|
- | 252 | .org trap_table + TT_TRAP_INSTRUCTION(3)*ENTRY_SIZE |
|
- | 253 | .global trap_instruction_3 |
|
- | 254 | trap_instruction_3: |
|
- | 255 | TRAP_INSTRUCTION 3 |
|
- | 256 | ||
- | 257 | /* TT = 0x104, TL = 0, trap_instruction_4 */ |
|
- | 258 | .org trap_table + TT_TRAP_INSTRUCTION(4)*ENTRY_SIZE |
|
- | 259 | .global trap_instruction_4 |
|
- | 260 | trap_instruction_4: |
|
- | 261 | TRAP_INSTRUCTION 4 |
|
- | 262 | ||
- | 263 | /* TT = 0x105, TL = 0, trap_instruction_5 */ |
|
- | 264 | .org trap_table + TT_TRAP_INSTRUCTION(5)*ENTRY_SIZE |
|
- | 265 | .global trap_instruction_5 |
|
- | 266 | trap_instruction_5: |
|
- | 267 | TRAP_INSTRUCTION 5 |
|
- | 268 | ||
- | 269 | /* TT = 0x106, TL = 0, trap_instruction_6 */ |
|
- | 270 | .org trap_table + TT_TRAP_INSTRUCTION(6)*ENTRY_SIZE |
|
- | 271 | .global trap_instruction_6 |
|
- | 272 | trap_instruction_6: |
|
- | 273 | TRAP_INSTRUCTION 6 |
|
- | 274 | ||
- | 275 | /* TT = 0x107, TL = 0, trap_instruction_7 */ |
|
- | 276 | .org trap_table + TT_TRAP_INSTRUCTION(7)*ENTRY_SIZE |
|
- | 277 | .global trap_instruction_7 |
|
- | 278 | trap_instruction_7: |
|
- | 279 | TRAP_INSTRUCTION 7 |
|
- | 280 | ||
- | 281 | /* TT = 0x108, TL = 0, trap_instruction_8 */ |
|
- | 282 | .org trap_table + TT_TRAP_INSTRUCTION(8)*ENTRY_SIZE |
|
- | 283 | .global trap_instruction_8 |
|
- | 284 | trap_instruction_8: |
|
- | 285 | TRAP_INSTRUCTION 8 |
|
- | 286 | ||
- | 287 | /* TT = 0x109, TL = 0, trap_instruction_9 */ |
|
- | 288 | .org trap_table + TT_TRAP_INSTRUCTION(9)*ENTRY_SIZE |
|
- | 289 | .global trap_instruction_9 |
|
- | 290 | trap_instruction_9: |
|
- | 291 | TRAP_INSTRUCTION 9 |
|
- | 292 | ||
- | 293 | /* TT = 0x10a, TL = 0, trap_instruction_10 */ |
|
- | 294 | .org trap_table + TT_TRAP_INSTRUCTION(10)*ENTRY_SIZE |
|
- | 295 | .global trap_instruction_10 |
|
- | 296 | trap_instruction_10: |
|
- | 297 | TRAP_INSTRUCTION 10 |
|
- | 298 | ||
- | 299 | /* TT = 0x10b, TL = 0, trap_instruction_11 */ |
|
- | 300 | .org trap_table + TT_TRAP_INSTRUCTION(11)*ENTRY_SIZE |
|
- | 301 | .global trap_instruction_11 |
|
- | 302 | trap_instruction_11: |
|
- | 303 | TRAP_INSTRUCTION 11 |
|
- | 304 | ||
- | 305 | /* TT = 0x10c, TL = 0, trap_instruction_12 */ |
|
- | 306 | .org trap_table + TT_TRAP_INSTRUCTION(12)*ENTRY_SIZE |
|
- | 307 | .global trap_instruction_12 |
|
- | 308 | trap_instruction_12: |
|
- | 309 | TRAP_INSTRUCTION 12 |
|
- | 310 | ||
- | 311 | /* TT = 0x10d, TL = 0, trap_instruction_13 */ |
|
- | 312 | .org trap_table + TT_TRAP_INSTRUCTION(13)*ENTRY_SIZE |
|
- | 313 | .global trap_instruction_13 |
|
- | 314 | trap_instruction_13: |
|
- | 315 | TRAP_INSTRUCTION 13 |
|
- | 316 | ||
- | 317 | /* TT = 0x10e, TL = 0, trap_instruction_14 */ |
|
- | 318 | .org trap_table + TT_TRAP_INSTRUCTION(14)*ENTRY_SIZE |
|
- | 319 | .global trap_instruction_14 |
|
- | 320 | trap_instruction_14: |
|
- | 321 | TRAP_INSTRUCTION 14 |
|
- | 322 | ||
- | 323 | /* TT = 0x10f, TL = 0, trap_instruction_15 */ |
|
- | 324 | .org trap_table + TT_TRAP_INSTRUCTION(15)*ENTRY_SIZE |
|
- | 325 | .global trap_instruction_15 |
|
- | 326 | trap_instruction_15: |
|
- | 327 | TRAP_INSTRUCTION 15 |
|
- | 328 | ||
- | 329 | /* TT = 0x110, TL = 0, trap_instruction_16 */ |
|
- | 330 | .org trap_table + TT_TRAP_INSTRUCTION(16)*ENTRY_SIZE |
|
- | 331 | .global trap_instruction_16 |
|
- | 332 | trap_instruction_16: |
|
- | 333 | TRAP_INSTRUCTION 16 |
|
- | 334 | ||
- | 335 | /* TT = 0x111, TL = 0, trap_instruction_17 */ |
|
- | 336 | .org trap_table + TT_TRAP_INSTRUCTION(17)*ENTRY_SIZE |
|
- | 337 | .global trap_instruction_17 |
|
- | 338 | trap_instruction_17: |
|
- | 339 | TRAP_INSTRUCTION 17 |
|
- | 340 | ||
- | 341 | /* TT = 0x112, TL = 0, trap_instruction_18 */ |
|
- | 342 | .org trap_table + TT_TRAP_INSTRUCTION(18)*ENTRY_SIZE |
|
- | 343 | .global trap_instruction_18 |
|
- | 344 | trap_instruction_18: |
|
- | 345 | TRAP_INSTRUCTION 18 |
|
- | 346 | ||
- | 347 | /* TT = 0x113, TL = 0, trap_instruction_19 */ |
|
- | 348 | .org trap_table + TT_TRAP_INSTRUCTION(19)*ENTRY_SIZE |
|
- | 349 | .global trap_instruction_19 |
|
- | 350 | trap_instruction_19: |
|
- | 351 | TRAP_INSTRUCTION 19 |
|
- | 352 | ||
- | 353 | /* TT = 0x114, TL = 0, trap_instruction_20 */ |
|
- | 354 | .org trap_table + TT_TRAP_INSTRUCTION(20)*ENTRY_SIZE |
|
- | 355 | .global trap_instruction_20 |
|
- | 356 | trap_instruction_20: |
|
- | 357 | TRAP_INSTRUCTION 20 |
|
- | 358 | ||
- | 359 | /* TT = 0x115, TL = 0, trap_instruction_21 */ |
|
- | 360 | .org trap_table + TT_TRAP_INSTRUCTION(21)*ENTRY_SIZE |
|
- | 361 | .global trap_instruction_21 |
|
- | 362 | trap_instruction_21: |
|
- | 363 | TRAP_INSTRUCTION 21 |
|
- | 364 | ||
- | 365 | /* TT = 0x116, TL = 0, trap_instruction_22 */ |
|
- | 366 | .org trap_table + TT_TRAP_INSTRUCTION(22)*ENTRY_SIZE |
|
- | 367 | .global trap_instruction_22 |
|
- | 368 | trap_instruction_22: |
|
- | 369 | TRAP_INSTRUCTION 22 |
|
- | 370 | ||
- | 371 | /* TT = 0x117, TL = 0, trap_instruction_23 */ |
|
- | 372 | .org trap_table + TT_TRAP_INSTRUCTION(23)*ENTRY_SIZE |
|
- | 373 | .global trap_instruction_23 |
|
- | 374 | trap_instruction_23: |
|
- | 375 | TRAP_INSTRUCTION 23 |
|
- | 376 | ||
- | 377 | /* TT = 0x118, TL = 0, trap_instruction_24 */ |
|
- | 378 | .org trap_table + TT_TRAP_INSTRUCTION(24)*ENTRY_SIZE |
|
- | 379 | .global trap_instruction_24 |
|
- | 380 | trap_instruction_24: |
|
- | 381 | TRAP_INSTRUCTION 24 |
|
- | 382 | ||
- | 383 | /* TT = 0x119, TL = 0, trap_instruction_25 */ |
|
- | 384 | .org trap_table + TT_TRAP_INSTRUCTION(25)*ENTRY_SIZE |
|
- | 385 | .global trap_instruction_25 |
|
- | 386 | trap_instruction_25: |
|
- | 387 | TRAP_INSTRUCTION 25 |
|
- | 388 | ||
- | 389 | /* TT = 0x11a, TL = 0, trap_instruction_26 */ |
|
- | 390 | .org trap_table + TT_TRAP_INSTRUCTION(26)*ENTRY_SIZE |
|
- | 391 | .global trap_instruction_26 |
|
- | 392 | trap_instruction_26: |
|
- | 393 | TRAP_INSTRUCTION 26 |
|
- | 394 | ||
- | 395 | /* TT = 0x11b, TL = 0, trap_instruction_27 */ |
|
- | 396 | .org trap_table + TT_TRAP_INSTRUCTION(27)*ENTRY_SIZE |
|
- | 397 | .global trap_instruction_27 |
|
- | 398 | trap_instruction_27: |
|
- | 399 | TRAP_INSTRUCTION 27 |
|
- | 400 | ||
- | 401 | /* TT = 0x11c, TL = 0, trap_instruction_28 */ |
|
- | 402 | .org trap_table + TT_TRAP_INSTRUCTION(28)*ENTRY_SIZE |
|
- | 403 | .global trap_instruction_28 |
|
- | 404 | trap_instruction_28: |
|
- | 405 | TRAP_INSTRUCTION 28 |
|
- | 406 | ||
- | 407 | /* TT = 0x11d, TL = 0, trap_instruction_29 */ |
|
- | 408 | .org trap_table + TT_TRAP_INSTRUCTION(29)*ENTRY_SIZE |
|
- | 409 | .global trap_instruction_29 |
|
- | 410 | trap_instruction_29: |
|
- | 411 | TRAP_INSTRUCTION 29 |
|
- | 412 | ||
- | 413 | /* TT = 0x11e, TL = 0, trap_instruction_30 */ |
|
- | 414 | .org trap_table + TT_TRAP_INSTRUCTION(30)*ENTRY_SIZE |
|
- | 415 | .global trap_instruction_30 |
|
- | 416 | trap_instruction_30: |
|
- | 417 | TRAP_INSTRUCTION 30 |
|
- | 418 | ||
- | 419 | /* TT = 0x11f, TL = 0, trap_instruction_31 */ |
|
- | 420 | .org trap_table + TT_TRAP_INSTRUCTION(31)*ENTRY_SIZE |
|
- | 421 | .global trap_instruction_31 |
|
- | 422 | trap_instruction_31: |
|
- | 423 | TRAP_INSTRUCTION 31 |
|
- | 424 | ||
232 | /* |
425 | /* |
233 | * Handlers for TL>0. |
426 | * Handlers for TL>0. |
234 | */ |
427 | */ |
235 | 428 | ||
236 | /* TT = 0x08, TL > 0, instruction_access_exception */ |
429 | /* TT = 0x08, TL > 0, instruction_access_exception */ |
237 | .org trap_table + (TT_INSTRUCTION_ACCESS_EXCEPTION+512)*ENTRY_SIZE |
430 | .org trap_table + (TT_INSTRUCTION_ACCESS_EXCEPTION+512)*ENTRY_SIZE |
238 | .global instruction_access_exception_high |
431 | .global instruction_access_exception_high |
239 | instruction_access_exception_high: |
432 | instruction_access_exception_high: |
240 | PREEMPTIBLE_HANDLER do_instruction_access_exc |
433 | PREEMPTIBLE_HANDLER do_instruction_access_exc |
241 | 434 | ||
242 | /* TT = 0x10, TL > 0, illegal_instruction */ |
435 | /* TT = 0x10, TL > 0, illegal_instruction */ |
243 | .org trap_table + (TT_ILLEGAL_INSTRUCTION+512)*ENTRY_SIZE |
436 | .org trap_table + (TT_ILLEGAL_INSTRUCTION+512)*ENTRY_SIZE |
244 | .global illegal_instruction_high |
437 | .global illegal_instruction_high |
245 | illegal_instruction_high: |
438 | illegal_instruction_high: |
246 | PREEMPTIBLE_HANDLER do_illegal_instruction |
439 | PREEMPTIBLE_HANDLER do_illegal_instruction |
247 | 440 | ||
248 | /* TT = 0x24, TL > 0, clean_window handler */ |
441 | /* TT = 0x24, TL > 0, clean_window handler */ |
249 | .org trap_table + (TT_CLEAN_WINDOW+512)*ENTRY_SIZE |
442 | .org trap_table + (TT_CLEAN_WINDOW+512)*ENTRY_SIZE |
250 | .global clean_window_handler_high |
443 | .global clean_window_handler_high |
251 | clean_window_handler_high: |
444 | clean_window_handler_high: |
252 | CLEAN_WINDOW_HANDLER |
445 | CLEAN_WINDOW_HANDLER |
253 | 446 | ||
254 | /* TT = 0x32, TL > 0, data_access_error */ |
447 | /* TT = 0x32, TL > 0, data_access_error */ |
255 | .org trap_table + (TT_DATA_ACCESS_ERROR+512)*ENTRY_SIZE |
448 | .org trap_table + (TT_DATA_ACCESS_ERROR+512)*ENTRY_SIZE |
256 | .global data_access_error_high |
449 | .global data_access_error_high |
257 | data_access_error_high: |
450 | data_access_error_high: |
258 | PREEMPTIBLE_HANDLER do_data_access_error |
451 | PREEMPTIBLE_HANDLER do_data_access_error |
259 | 452 | ||
260 | /* TT = 0x34, TL > 0, mem_address_not_aligned */ |
453 | /* TT = 0x34, TL > 0, mem_address_not_aligned */ |
261 | .org trap_table + (TT_MEM_ADDRESS_NOT_ALIGNED+512)*ENTRY_SIZE |
454 | .org trap_table + (TT_MEM_ADDRESS_NOT_ALIGNED+512)*ENTRY_SIZE |
262 | .global mem_address_not_aligned_high |
455 | .global mem_address_not_aligned_high |
263 | mem_address_not_aligned_high: |
456 | mem_address_not_aligned_high: |
264 | PREEMPTIBLE_HANDLER do_mem_address_not_aligned |
457 | PREEMPTIBLE_HANDLER do_mem_address_not_aligned |
265 | 458 | ||
266 | /* TT = 0x64, TL > 0, fast_instruction_access_MMU_miss */ |
459 | /* TT = 0x64, TL > 0, fast_instruction_access_MMU_miss */ |
267 | .org trap_table + (TT_FAST_INSTRUCTION_ACCESS_MMU_MISS+512)*ENTRY_SIZE |
460 | .org trap_table + (TT_FAST_INSTRUCTION_ACCESS_MMU_MISS+512)*ENTRY_SIZE |
268 | .global fast_instruction_access_mmu_miss_handler_high |
461 | .global fast_instruction_access_mmu_miss_handler_high |
269 | fast_instruction_access_mmu_miss_handler_high: |
462 | fast_instruction_access_mmu_miss_handler_high: |
270 | FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER |
463 | FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER |
271 | 464 | ||
272 | /* TT = 0x68, TL > 0, fast_data_access_MMU_miss */ |
465 | /* TT = 0x68, TL > 0, fast_data_access_MMU_miss */ |
273 | .org trap_table + (TT_FAST_DATA_ACCESS_MMU_MISS+512)*ENTRY_SIZE |
466 | .org trap_table + (TT_FAST_DATA_ACCESS_MMU_MISS+512)*ENTRY_SIZE |
274 | .global fast_data_access_mmu_miss_handler_high |
467 | .global fast_data_access_mmu_miss_handler_high |
275 | fast_data_access_mmu_miss_handler_high: |
468 | fast_data_access_mmu_miss_handler_high: |
276 | FAST_DATA_ACCESS_MMU_MISS_HANDLER |
469 | FAST_DATA_ACCESS_MMU_MISS_HANDLER |
277 | 470 | ||
278 | /* TT = 0x6c, TL > 0, fast_data_access_protection */ |
471 | /* TT = 0x6c, TL > 0, fast_data_access_protection */ |
279 | .org trap_table + (TT_FAST_DATA_ACCESS_PROTECTION+512)*ENTRY_SIZE |
472 | .org trap_table + (TT_FAST_DATA_ACCESS_PROTECTION+512)*ENTRY_SIZE |
280 | .global fast_data_access_protection_handler_high |
473 | .global fast_data_access_protection_handler_high |
281 | fast_data_access_protection_handler_high: |
474 | fast_data_access_protection_handler_high: |
282 | FAST_DATA_ACCESS_PROTECTION_HANDLER |
475 | FAST_DATA_ACCESS_PROTECTION_HANDLER |
283 | 476 | ||
284 | /* TT = 0x80, TL > 0, spill_0_normal handler */ |
477 | /* TT = 0x80, TL > 0, spill_0_normal handler */ |
285 | .org trap_table + (TT_SPILL_0_NORMAL+512)*ENTRY_SIZE |
478 | .org trap_table + (TT_SPILL_0_NORMAL+512)*ENTRY_SIZE |
286 | .global spill_0_normal_high |
479 | .global spill_0_normal_high |
287 | spill_0_normal_high: |
480 | spill_0_normal_high: |
288 | SPILL_NORMAL_HANDLER_KERNEL |
481 | SPILL_NORMAL_HANDLER_KERNEL |
289 | 482 | ||
290 | /* TT = 0x88, TL > 0, spill_2_normal handler */ |
483 | /* TT = 0x88, TL > 0, spill_2_normal handler */ |
291 | .org trap_table + (TT_SPILL_2_NORMAL+512)*ENTRY_SIZE |
484 | .org trap_table + (TT_SPILL_2_NORMAL+512)*ENTRY_SIZE |
292 | .global spill_2_normal_high |
485 | .global spill_2_normal_high |
293 | spill_2_normal_high: |
486 | spill_2_normal_high: |
294 | SPILL_TO_USPACE_WINDOW_BUFFER |
487 | SPILL_TO_USPACE_WINDOW_BUFFER |
295 | 488 | ||
296 | /* TT = 0xa0, TL > 0, spill_0_other handler */ |
489 | /* TT = 0xa0, TL > 0, spill_0_other handler */ |
297 | .org trap_table + (TT_SPILL_0_OTHER+512)*ENTRY_SIZE |
490 | .org trap_table + (TT_SPILL_0_OTHER+512)*ENTRY_SIZE |
298 | .global spill_0_other_high |
491 | .global spill_0_other_high |
299 | spill_0_other_high: |
492 | spill_0_other_high: |
300 | SPILL_TO_USPACE_WINDOW_BUFFER |
493 | SPILL_TO_USPACE_WINDOW_BUFFER |
301 | 494 | ||
302 | /* TT = 0xc0, TL > 0, fill_0_normal handler */ |
495 | /* TT = 0xc0, TL > 0, fill_0_normal handler */ |
303 | .org trap_table + (TT_FILL_0_NORMAL+512)*ENTRY_SIZE |
496 | .org trap_table + (TT_FILL_0_NORMAL+512)*ENTRY_SIZE |
304 | .global fill_0_normal_high |
497 | .global fill_0_normal_high |
305 | fill_0_normal_high: |
498 | fill_0_normal_high: |
306 | FILL_NORMAL_HANDLER_KERNEL |
499 | FILL_NORMAL_HANDLER_KERNEL |
307 | 500 | ||
- | 501 | #define NOT(x) ((x) == 0) |
|
308 | 502 | ||
309 | /* Preemptible trap handler for TL=1. |
503 | /* Preemptible trap handler for TL=1. |
310 | * |
504 | * |
311 | * This trap handler makes arrangements to make calling of scheduler() from |
505 | * This trap handler makes arrangements to make calling of scheduler() from |
312 | * within a trap context possible. It is called from several other trap |
506 | * within a trap context possible. It is called from several other trap |
313 | * handlers. |
507 | * handlers. |
314 | * |
508 | * |
315 | * This function can be entered either with interrupt globals or alternate globals. |
509 | * This function can be entered either with interrupt globals or alternate globals. |
316 | * Memory management trap handlers are obliged to switch to one of those global sets |
510 | * Memory management trap handlers are obliged to switch to one of those global sets |
317 | * prior to calling this function. Register window management functions are not |
511 | * prior to calling this function. Register window management functions are not |
318 | * allowed to modify the alternate global registers. |
512 | * allowed to modify the alternate global registers. |
319 | * |
513 | * |
320 | * Input registers: |
514 | * Input registers: |
321 | * %g1 Address of function to call. |
515 | * %g1 Address of function to call. |
322 | * %g2 Argument for the function. |
516 | * %g2 Argument for the function. |
323 | * %g6 Pre-set as kernel stack base if trap from userspace. |
517 | * %g6 Pre-set as kernel stack base if trap from userspace. |
324 | * %g7 Pre-set as address of the userspace window buffer. |
518 | * %g7 Pre-set as address of the userspace window buffer. |
325 | */ |
519 | */ |
326 | .global preemptible_handler |
520 | .macro PREEMPTIBLE_HANDLER_TEMPLATE is_syscall |
327 | preemptible_handler: |
521 | .if NOT(\is_syscall) |
328 | rdpr %tstate, %g3 |
522 | rdpr %tstate, %g3 |
329 | andcc %g3, TSTATE_PRIV_BIT, %g0 ! if this trap came from the privileged mode... |
523 | andcc %g3, TSTATE_PRIV_BIT, %g0 ! if this trap came from the privileged mode... |
330 | bnz 0f ! ...skip setting of kernel stack and primary context |
524 | bnz 0f ! ...skip setting of kernel stack and primary context |
331 | nop |
525 | nop |
332 | 526 | .endif |
|
333 | /* |
527 | /* |
334 | * Normal window spills will go to the userspace window buffer. |
528 | * Normal window spills will go to the userspace window buffer. |
335 | */ |
529 | */ |
336 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(2), %wstate |
530 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(2), %wstate |
337 | 531 | ||
338 | /* |
532 | /* |
339 | * Switch to kernel stack. The old stack is |
533 | * Switch to kernel stack. The old stack is |
340 | * automatically saved in the old window's %sp |
534 | * automatically saved in the old window's %sp |
341 | * and the new window's %fp. |
535 | * and the new window's %fp. |
342 | */ |
536 | */ |
343 | save %g6, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
537 | save %g6, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
344 | 538 | ||
- | 539 | .if \is_syscall |
|
- | 540 | /* |
|
- | 541 | * Copy arguments for the syscall to the new window. |
|
- | 542 | */ |
|
- | 543 | mov %i0, %o2 |
|
- | 544 | mov %i1, %o3 |
|
- | 545 | mov %i2, %o4 |
|
- | 546 | mov %i3, %o5 |
|
- | 547 | .endif |
|
- | 548 | ||
345 | /* |
549 | /* |
346 | * Mark the CANSAVE windows as OTHER windows. |
550 | * Mark the CANSAVE windows as OTHER windows. |
347 | * Set CLEANWIN to NWINDOW-1 so that clean_window traps do not occur. |
551 | * Set CLEANWIN to NWINDOW-1 so that clean_window traps do not occur. |
348 | */ |
552 | */ |
349 | rdpr %cansave, %l0 |
553 | rdpr %cansave, %l0 |
350 | wrpr %l0, %otherwin |
554 | wrpr %l0, %otherwin |
351 | wrpr %g0, %cansave |
555 | wrpr %g0, %cansave |
352 | wrpr %g0, NWINDOW - 1, %cleanwin |
556 | wrpr %g0, NWINDOW - 1, %cleanwin |
353 | 557 | ||
354 | /* |
558 | /* |
355 | * Switch to primary context 0. |
559 | * Switch to primary context 0. |
356 | */ |
560 | */ |
357 | mov VA_PRIMARY_CONTEXT_REG, %l0 |
561 | mov VA_PRIMARY_CONTEXT_REG, %l0 |
358 | stxa %g0, [%l0] ASI_DMMU |
562 | stxa %g0, [%l0] ASI_DMMU |
359 | rd %pc, %l0 |
563 | rd %pc, %l0 |
360 | flush %l0 |
564 | flush %l0 |
361 | 565 | ||
- | 566 | .if NOT(\is_syscall) |
|
362 | ba 1f |
567 | ba 1f |
363 | nop |
568 | nop |
364 | 569 | ||
365 | 0: |
570 | 0: |
366 | save %sp, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
571 | save %sp, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
367 | 572 | ||
368 | /* |
573 | /* |
369 | * At this moment, we are using the kernel stack |
574 | * At this moment, we are using the kernel stack |
370 | * and have successfully allocated a register window. |
575 | * and have successfully allocated a register window. |
371 | */ |
576 | */ |
372 | 1: |
577 | 1: |
373 | 578 | .endif |
|
374 | /* |
579 | /* |
375 | * Other window spills will go to the userspace window buffer |
580 | * Other window spills will go to the userspace window buffer |
376 | * and normal spills will go to the kernel stack. |
581 | * and normal spills will go to the kernel stack. |
377 | */ |
582 | */ |
378 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(0), %wstate |
583 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(0), %wstate |
379 | 584 | ||
380 | /* |
585 | /* |
381 | * Copy arguments. |
586 | * Copy arguments. |
382 | */ |
587 | */ |
383 | mov %g1, %l0 |
588 | mov %g1, %l0 |
384 | mov %g2, %o0 |
589 | mov %g2, %o0 |
385 | 590 | ||
386 | /* |
591 | /* |
387 | * Save TSTATE, TPC and TNPC aside. |
592 | * Save TSTATE, TPC and TNPC aside. |
388 | */ |
593 | */ |
389 | rdpr %tstate, %g1 |
594 | rdpr %tstate, %g1 |
390 | rdpr %tpc, %g2 |
595 | rdpr %tpc, %g2 |
391 | rdpr %tnpc, %g3 |
596 | rdpr %tnpc, %g3 |
392 | 597 | ||
393 | /* |
598 | /* |
394 | * The following memory accesses will not fault |
599 | * The following memory accesses will not fault |
395 | * because special provisions are made to have |
600 | * because special provisions are made to have |
396 | * the kernel stack of THREAD locked in DTLB. |
601 | * the kernel stack of THREAD locked in DTLB. |
397 | */ |
602 | */ |
398 | stx %g1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE] |
603 | stx %g1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE] |
399 | stx %g2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC] |
604 | stx %g2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC] |
400 | stx %g3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC] |
605 | stx %g3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC] |
401 | 606 | ||
402 | wrpr %g0, 0, %tl |
607 | wrpr %g0, 0, %tl |
403 | wrpr %g0, PSTATE_PRIV_BIT, %pstate |
608 | wrpr %g0, PSTATE_PRIV_BIT, %pstate |
404 | SAVE_GLOBALS |
609 | SAVE_GLOBALS |
405 | 610 | ||
406 | /* |
611 | /* |
407 | * Call the higher-level handler and pass istate as second parameter. |
612 | * Call the higher-level handler and pass istate as second parameter. |
408 | */ |
613 | */ |
409 | call %l0 |
614 | call %l0 |
410 | add %sp, PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC, %o1 |
615 | add %sp, PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC, %o1 |
411 | 616 | ||
- | 617 | .if \is_syscall |
|
- | 618 | /* |
|
- | 619 | * Copy the value returned by the syscall. |
|
- | 620 | */ |
|
- | 621 | mov %o0, %i0 |
|
- | 622 | .endif |
|
- | 623 | ||
412 | RESTORE_GLOBALS |
624 | RESTORE_GLOBALS |
413 | wrpr %g0, PSTATE_AG_BIT | PSTATE_PRIV_BIT, %pstate |
625 | wrpr %g0, PSTATE_AG_BIT | PSTATE_PRIV_BIT, %pstate |
414 | wrpr %g0, 1, %tl |
626 | wrpr %g0, 1, %tl |
415 | 627 | ||
416 | /* |
628 | /* |
417 | * Read TSTATE, TPC and TNPC from saved copy. |
629 | * Read TSTATE, TPC and TNPC from saved copy. |
418 | */ |
630 | */ |
419 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE], %g1 |
631 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TSTATE], %g1 |
420 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC], %g2 |
632 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TPC], %g2 |
421 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC], %g3 |
633 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_TNPC], %g3 |
422 | 634 | ||
423 | /* |
635 | /* |
424 | * Restore TSTATE, TPC and TNPC from saved copies. |
636 | * Restore TSTATE, TPC and TNPC from saved copies. |
425 | */ |
637 | */ |
426 | wrpr %g1, 0, %tstate |
638 | wrpr %g1, 0, %tstate |
427 | wrpr %g2, 0, %tpc |
639 | wrpr %g2, 0, %tpc |
428 | wrpr %g3, 0, %tnpc |
640 | wrpr %g3, 0, %tnpc |
429 | 641 | ||
430 | /* |
642 | /* |
431 | * If OTHERWIN is zero, then all the userspace windows have been |
643 | * If OTHERWIN is zero, then all the userspace windows have been |
432 | * spilled to kernel memory (i.e. register window buffer). If |
644 | * spilled to kernel memory (i.e. register window buffer). If |
433 | * OTHERWIN is non-zero, then some userspace windows are still |
645 | * OTHERWIN is non-zero, then some userspace windows are still |
434 | * valid. Others might have been spilled. However, the CWP pointer |
646 | * valid. Others might have been spilled. However, the CWP pointer |
435 | * needs no fixing because the scheduler had not been called. |
647 | * needs no fixing because the scheduler had not been called. |
436 | */ |
648 | */ |
437 | rdpr %otherwin, %l0 |
649 | rdpr %otherwin, %l0 |
438 | brnz %l0, 0f |
650 | brnz %l0, 0f |
439 | nop |
651 | nop |
440 | 652 | ||
441 | /* |
653 | /* |
442 | * OTHERWIN == 0 |
654 | * OTHERWIN == 0 |
443 | */ |
655 | */ |
444 | 656 | ||
445 | /* |
657 | /* |
446 | * If TSTATE.CWP + 1 == CWP, then we still do not have to fix CWP. |
658 | * If TSTATE.CWP + 1 == CWP, then we still do not have to fix CWP. |
447 | */ |
659 | */ |
448 | and %g1, TSTATE_CWP_MASK, %l0 |
660 | and %g1, TSTATE_CWP_MASK, %l0 |
449 | inc %l0 |
661 | inc %l0 |
450 | and %l0, TSTATE_CWP_MASK, %l0 ! %l0 mod NWINDOW |
662 | and %l0, TSTATE_CWP_MASK, %l0 ! %l0 mod NWINDOW |
451 | rdpr %cwp, %l1 |
663 | rdpr %cwp, %l1 |
452 | cmp %l0, %l1 |
664 | cmp %l0, %l1 |
453 | bz 0f ! CWP is ok |
665 | bz 0f ! CWP is ok |
454 | nop |
666 | nop |
455 | 667 | ||
456 | /* |
668 | /* |
457 | * Fix CWP. |
669 | * Fix CWP. |
458 | * Just for reminder, the input registers in the current window |
670 | * Just for reminder, the input registers in the current window |
459 | * are the output registers of the window to which we want to |
671 | * are the output registers of the window to which we want to |
460 | * restore. Because the fill trap fills only input and local |
672 | * restore. Because the fill trap fills only input and local |
461 | * registers of a window, we need to preserve those output |
673 | * registers of a window, we need to preserve those output |
462 | * registers manually. |
674 | * registers manually. |
463 | */ |
675 | */ |
464 | flushw |
676 | flushw |
465 | mov %sp, %g2 |
677 | mov %sp, %g2 |
466 | stx %i0, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0] |
678 | stx %i0, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0] |
467 | stx %i1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1] |
679 | stx %i1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1] |
468 | stx %i2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2] |
680 | stx %i2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2] |
469 | stx %i3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3] |
681 | stx %i3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3] |
470 | stx %i4, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I4] |
682 | stx %i4, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I4] |
471 | stx %i5, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I5] |
683 | stx %i5, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I5] |
472 | stx %i6, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I6] |
684 | stx %i6, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I6] |
473 | stx %i7, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I7] |
685 | stx %i7, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I7] |
474 | wrpr %l0, 0, %cwp |
686 | wrpr %l0, 0, %cwp |
475 | mov %g2, %sp |
687 | mov %g2, %sp |
476 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0], %i0 |
688 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0], %i0 |
477 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1], %i1 |
689 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1], %i1 |
478 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2], %i2 |
690 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2], %i2 |
479 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3], %i3 |
691 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3], %i3 |
480 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I4], %i4 |
692 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I4], %i4 |
481 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I5], %i5 |
693 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I5], %i5 |
482 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I6], %i6 |
694 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I6], %i6 |
483 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I7], %i7 |
695 | ldx [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I7], %i7 |
484 | 696 | ||
485 | /* |
697 | /* |
486 | * OTHERWIN != 0 or fall-through from the OTHERWIN == 0 case. |
698 | * OTHERWIN != 0 or fall-through from the OTHERWIN == 0 case. |
487 | * The CWP has already been restored to the value it had prior to the SAVE |
699 | * The CWP has already been restored to the value it had prior to the SAVE |
488 | * at the beginning of this function. |
700 | * at the beginning of this function. |
489 | */ |
701 | */ |
490 | 0: |
702 | 0: |
- | 703 | .if NOT(\is_syscall) |
|
491 | rdpr %tstate, %g1 |
704 | rdpr %tstate, %g1 |
492 | andcc %g1, TSTATE_PRIV_BIT, %g0 ! if we are not returning to userspace..., |
705 | andcc %g1, TSTATE_PRIV_BIT, %g0 ! if we are not returning to userspace..., |
493 | bnz 1f ! ...skip restoring userspace windows |
706 | bnz 1f ! ...skip restoring userspace windows |
494 | nop |
707 | nop |
- | 708 | .endif |
|
495 | 709 | ||
496 | /* |
710 | /* |
497 | * Spills and fills will be processed by the {spill,fill}_1_normal |
711 | * Spills and fills will be processed by the {spill,fill}_1_normal |
498 | * handlers. |
712 | * handlers. |
499 | */ |
713 | */ |
500 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
714 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
501 | 715 | ||
502 | /* |
716 | /* |
503 | * Set primary context according to secondary context. |
717 | * Set primary context according to secondary context. |
504 | */ |
718 | */ |
505 | wr %g0, ASI_DMMU, %asi |
719 | wr %g0, ASI_DMMU, %asi |
506 | ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1 |
720 | ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1 |
507 | stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi |
721 | stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi |
508 | flush %o7 |
722 | flush %o7 |
509 | 723 | ||
510 | rdpr %cwp, %g1 |
724 | rdpr %cwp, %g1 |
511 | rdpr %otherwin, %g2 |
725 | rdpr %otherwin, %g2 |
512 | 726 | ||
513 | /* |
727 | /* |
514 | * Skip all OTHERWIN windows and descend to the first window |
728 | * Skip all OTHERWIN windows and descend to the first window |
515 | * in the userspace window buffer. |
729 | * in the userspace window buffer. |
516 | */ |
730 | */ |
517 | sub %g1, %g2, %g3 |
731 | sub %g1, %g2, %g3 |
518 | dec %g3 |
732 | dec %g3 |
519 | and %g3, NWINDOW - 1, %g3 |
733 | and %g3, NWINDOW - 1, %g3 |
520 | wrpr %g3, 0, %cwp |
734 | wrpr %g3, 0, %cwp |
521 | 735 | ||
522 | /* |
736 | /* |
523 | * CWP is now in the window last saved in the userspace window buffer. |
737 | * CWP is now in the window last saved in the userspace window buffer. |
524 | * Fill all windows stored in the buffer. |
738 | * Fill all windows stored in the buffer. |
525 | */ |
739 | */ |
526 | clr %g4 |
740 | clr %g4 |
527 | 0: andcc %g7, PAGE_WIDTH - 1, %g0 ! PAGE_SIZE alignment check |
741 | 0: andcc %g7, PAGE_WIDTH - 1, %g0 ! PAGE_SIZE alignment check |
528 | bz 0f ! %g7 is page-aligned, no more windows to refill |
742 | bz 0f ! %g7 is page-aligned, no more windows to refill |
529 | nop |
743 | nop |
530 | 744 | ||
531 | add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7 |
745 | add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7 |
532 | ldx [%g7 + L0_OFFSET], %l0 |
746 | ldx [%g7 + L0_OFFSET], %l0 |
533 | ldx [%g7 + L1_OFFSET], %l1 |
747 | ldx [%g7 + L1_OFFSET], %l1 |
534 | ldx [%g7 + L2_OFFSET], %l2 |
748 | ldx [%g7 + L2_OFFSET], %l2 |
535 | ldx [%g7 + L3_OFFSET], %l3 |
749 | ldx [%g7 + L3_OFFSET], %l3 |
536 | ldx [%g7 + L4_OFFSET], %l4 |
750 | ldx [%g7 + L4_OFFSET], %l4 |
537 | ldx [%g7 + L5_OFFSET], %l5 |
751 | ldx [%g7 + L5_OFFSET], %l5 |
538 | ldx [%g7 + L6_OFFSET], %l6 |
752 | ldx [%g7 + L6_OFFSET], %l6 |
539 | ldx [%g7 + L7_OFFSET], %l7 |
753 | ldx [%g7 + L7_OFFSET], %l7 |
540 | ldx [%g7 + I0_OFFSET], %i0 |
754 | ldx [%g7 + I0_OFFSET], %i0 |
541 | ldx [%g7 + I1_OFFSET], %i1 |
755 | ldx [%g7 + I1_OFFSET], %i1 |
542 | ldx [%g7 + I2_OFFSET], %i2 |
756 | ldx [%g7 + I2_OFFSET], %i2 |
543 | ldx [%g7 + I3_OFFSET], %i3 |
757 | ldx [%g7 + I3_OFFSET], %i3 |
544 | ldx [%g7 + I4_OFFSET], %i4 |
758 | ldx [%g7 + I4_OFFSET], %i4 |
545 | ldx [%g7 + I5_OFFSET], %i5 |
759 | ldx [%g7 + I5_OFFSET], %i5 |
546 | ldx [%g7 + I6_OFFSET], %i6 |
760 | ldx [%g7 + I6_OFFSET], %i6 |
547 | ldx [%g7 + I7_OFFSET], %i7 |
761 | ldx [%g7 + I7_OFFSET], %i7 |
548 | 762 | ||
549 | dec %g3 |
763 | dec %g3 |
550 | and %g3, NWINDOW - 1, %g3 |
764 | and %g3, NWINDOW - 1, %g3 |
551 | wrpr %g3, 0, %cwp ! switch to the preceeding window |
765 | wrpr %g3, 0, %cwp ! switch to the preceeding window |
552 | 766 | ||
553 | ba 0b |
767 | ba 0b |
554 | inc %g4 |
768 | inc %g4 |
555 | 769 | ||
556 | 0: |
770 | 0: |
557 | /* |
771 | /* |
558 | * Switch back to the proper current window and adjust |
772 | * Switch back to the proper current window and adjust |
559 | * OTHERWIN, CANRESTORE, CANSAVE and CLEANWIN. |
773 | * OTHERWIN, CANRESTORE, CANSAVE and CLEANWIN. |
560 | */ |
774 | */ |
561 | wrpr %g1, 0, %cwp |
775 | wrpr %g1, 0, %cwp |
562 | add %g4, %g2, %g2 |
776 | add %g4, %g2, %g2 |
563 | cmp %g2, NWINDOW - 2 |
777 | cmp %g2, NWINDOW - 2 |
564 | bg 2f ! fix the CANRESTORE=NWINDOW-1 anomaly |
778 | bg 2f ! fix the CANRESTORE=NWINDOW-1 anomaly |
565 | mov NWINDOW - 2, %g1 ! use dealy slot for both cases |
779 | mov NWINDOW - 2, %g1 ! use dealy slot for both cases |
566 | sub %g1, %g2, %g1 |
780 | sub %g1, %g2, %g1 |
567 | 781 | ||
568 | wrpr %g0, 0, %otherwin |
782 | wrpr %g0, 0, %otherwin |
569 | wrpr %g1, 0, %cansave ! NWINDOW - 2 - CANRESTORE |
783 | wrpr %g1, 0, %cansave ! NWINDOW - 2 - CANRESTORE |
570 | wrpr %g2, 0, %canrestore ! OTHERWIN + windows in the buffer |
784 | wrpr %g2, 0, %canrestore ! OTHERWIN + windows in the buffer |
571 | wrpr %g2, 0, %cleanwin ! avoid information leak |
785 | wrpr %g2, 0, %cleanwin ! avoid information leak |
572 | 786 | ||
573 | 1: |
787 | 1: |
574 | restore |
788 | restore |
- | 789 | ||
- | 790 | .if \is_syscall |
|
- | 791 | done |
|
- | 792 | .else |
|
575 | retry |
793 | retry |
- | 794 | .endif |
|
576 | 795 | ||
577 | /* |
796 | /* |
578 | * We got here in order to avoid inconsistency of the window state registers. |
797 | * We got here in order to avoid inconsistency of the window state registers. |
579 | * If the: |
798 | * If the: |
580 | * |
799 | * |
581 | * save %g6, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
800 | * save %g6, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp |
582 | * |
801 | * |
583 | * instruction trapped and spilled a register window into the userspace |
802 | * instruction trapped and spilled a register window into the userspace |
584 | * window buffer, we have just restored NWINDOW - 1 register windows. |
803 | * window buffer, we have just restored NWINDOW - 1 register windows. |
585 | * However, CANRESTORE can be only NWINDOW - 2 at most. |
804 | * However, CANRESTORE can be only NWINDOW - 2 at most. |
586 | * |
805 | * |
587 | * The solution is to manually switch to (CWP - 1) mod NWINDOW |
806 | * The solution is to manually switch to (CWP - 1) mod NWINDOW |
588 | * and set the window state registers so that: |
807 | * and set the window state registers so that: |
589 | * |
808 | * |
590 | * CANRESTORE = NWINDOW - 2 |
809 | * CANRESTORE = NWINDOW - 2 |
591 | * CLEANWIN = NWINDOW - 2 |
810 | * CLEANWIN = NWINDOW - 2 |
592 | * CANSAVE = 0 |
811 | * CANSAVE = 0 |
593 | * OTHERWIN = 0 |
812 | * OTHERWIN = 0 |
594 | * |
813 | * |
595 | * The RESTORE isntruction is therfore to be skipped. |
814 | * The RESTORE isntruction is therfore to be skipped. |
596 | */ |
815 | */ |
597 | 2: |
816 | 2: |
598 | wrpr %g0, 0, %otherwin |
817 | wrpr %g0, 0, %otherwin |
599 | wrpr %g0, 0, %cansave |
818 | wrpr %g0, 0, %cansave |
600 | wrpr %g1, 0, %canrestore |
819 | wrpr %g1, 0, %canrestore |
601 | wrpr %g1, 0, %cleanwin |
820 | wrpr %g1, 0, %cleanwin |
602 | 821 | ||
603 | rdpr %cwp, %g1 |
822 | rdpr %cwp, %g1 |
604 | dec %g1 |
823 | dec %g1 |
605 | and %g1, NWINDOW - 1, %g1 |
824 | and %g1, NWINDOW - 1, %g1 |
606 | wrpr %g1, 0, %cwp ! CWP-- |
825 | wrpr %g1, 0, %cwp ! CWP-- |
607 | 826 | ||
- | 827 | .if \is_syscall |
|
- | 828 | done |
|
- | 829 | .else |
|
608 | retry |
830 | retry |
- | 831 | .endif |
|
- | 832 | ||
- | 833 | .endm |
|
- | 834 | ||
- | 835 | .global preemptible_handler |
|
- | 836 | preemptible_handler: |
|
- | 837 | PREEMPTIBLE_HANDLER_TEMPLATE 0 |
|
- | 838 | ||
- | 839 | .global trap_instruction_handler |
|
- | 840 | trap_instruction_handler: |
|
- | 841 | PREEMPTIBLE_HANDLER_TEMPLATE 1 |
|
609 | 842 | ||
610 | - | ||
611 |
|
- | |
612 | - | ||
613 | - | ||
614 | - |