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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 two trap tables. |
30 | * This file contains two trap tables. |
31 | * First, trap_table, is the one wich contains handlers implemented by |
31 | * First, trap_table, is the one wich contains handlers implemented by |
32 | * kernel. During initialization, these handlers are copied out to |
32 | * kernel. During initialization, these handlers are copied out to |
33 | * the second trap table, trap_table_save, and the first table is |
33 | * the second trap table, trap_table_save, and the first table is |
34 | * overwritten with copy of OFW's own trap table. The copy is then patched |
34 | * overwritten with copy of OFW's own trap table. The copy is then patched |
35 | * from the trap_table_save. |
35 | * from the trap_table_save. |
36 | * |
36 | * |
37 | * This arrangement is beneficial because kernel handlers stay on their |
37 | * This arrangement is beneficial because kernel handlers stay on their |
38 | * link-time addresses which is good for debugging. |
38 | * link-time addresses which is good for debugging. |
39 | */ |
39 | */ |
40 | 40 | ||
41 | .register %g2, #scratch |
41 | .register %g2, #scratch |
42 | .register %g3, #scratch |
42 | .register %g3, #scratch |
43 | .register %g6, #scratch |
43 | .register %g6, #scratch |
44 | .register %g7, #scratch |
44 | .register %g7, #scratch |
45 | 45 | ||
46 | .text |
46 | .text |
47 | 47 | ||
48 | #include <arch/trap/trap_table.h> |
48 | #include <arch/trap/trap_table.h> |
49 | #include <arch/trap/regwin.h> |
49 | #include <arch/trap/regwin.h> |
50 | #include <arch/trap/interrupt.h> |
50 | #include <arch/trap/interrupt.h> |
- | 51 | #include <arch/trap/exception.h> |
|
- | 52 | #include <arch/stack.h> |
|
51 | 53 | ||
52 | #define TABLE_SIZE TRAP_TABLE_SIZE |
54 | #define TABLE_SIZE TRAP_TABLE_SIZE |
53 | #define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
55 | #define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
54 | 56 | ||
55 | /* |
57 | /* |
56 | * Kernel trap table. |
58 | * Kernel trap table. |
57 | */ |
59 | */ |
58 | .align TABLE_SIZE |
60 | .align TABLE_SIZE |
59 | .global trap_table |
61 | .global trap_table |
60 | trap_table: |
62 | trap_table: |
61 | 63 | ||
- | 64 | /* TT = 0x08, TL = 0, instruction_access_exception */ |
|
- | 65 | .org trap_table + TT_INSTRUCTION_ACCESS_EXCEPTION*ENTRY_SIZE |
|
- | 66 | .global instruction_access_exception |
|
- | 67 | instruction_access_exception: |
|
- | 68 | SIMPLE_HANDLER do_instruction_access_exc |
|
- | 69 | ||
62 | /* TT = 0x24, TL = 0, clean_window handler */ |
70 | /* TT = 0x24, TL = 0, clean_window handler */ |
63 | .org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
71 | .org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
64 | .global clean_window_handler |
72 | .global clean_window_handler |
65 | clean_window_handler: |
73 | clean_window_handler: |
66 | CLEAN_WINDOW_HANDLER |
74 | CLEAN_WINDOW_HANDLER |
67 | 75 | ||
- | 76 | /* TT = 0x34, TL = 0, mem_address_not_aligned */ |
|
- | 77 | .org trap_table + TT_MEM_ADDRESS_NOT_ALIGNED*ENTRY_SIZE |
|
- | 78 | .global mem_address_not_aligned |
|
- | 79 | mem_address_not_aligned: |
|
- | 80 | SIMPLE_HANDLER do_mem_address_not_aligned |
|
- | 81 | ||
68 | /* TT = 0x41, TL = 0, interrupt_level_1 handler */ |
82 | /* TT = 0x41, TL = 0, interrupt_level_1 handler */ |
69 | .org trap_table + TT_INTERRUPT_LEVEL_1*ENTRY_SIZE |
83 | .org trap_table + TT_INTERRUPT_LEVEL_1*ENTRY_SIZE |
70 | .global interrupt_level_1_handler |
84 | .global interrupt_level_1_handler |
71 | interrupt_level_1_handler: |
85 | interrupt_level_1_handler: |
72 | INTERRUPT_LEVEL_N_HANDLER 1 |
86 | INTERRUPT_LEVEL_N_HANDLER 1 |
73 | 87 | ||
74 | /* TT = 0x42, TL = 0, interrupt_level_2 handler */ |
88 | /* TT = 0x42, TL = 0, interrupt_level_2 handler */ |
75 | .org trap_table + TT_INTERRUPT_LEVEL_2*ENTRY_SIZE |
89 | .org trap_table + TT_INTERRUPT_LEVEL_2*ENTRY_SIZE |
76 | .global interrupt_level_2_handler |
90 | .global interrupt_level_2_handler |
77 | interrupt_level_2_handler: |
91 | interrupt_level_2_handler: |
78 | INTERRUPT_LEVEL_N_HANDLER 2 |
92 | INTERRUPT_LEVEL_N_HANDLER 2 |
79 | 93 | ||
80 | /* TT = 0x43, TL = 0, interrupt_level_3 handler */ |
94 | /* TT = 0x43, TL = 0, interrupt_level_3 handler */ |
81 | .org trap_table + TT_INTERRUPT_LEVEL_3*ENTRY_SIZE |
95 | .org trap_table + TT_INTERRUPT_LEVEL_3*ENTRY_SIZE |
82 | .global interrupt_level_3_handler |
96 | .global interrupt_level_3_handler |
83 | interrupt_level_3_handler: |
97 | interrupt_level_3_handler: |
84 | INTERRUPT_LEVEL_N_HANDLER 3 |
98 | INTERRUPT_LEVEL_N_HANDLER 3 |
85 | 99 | ||
86 | /* TT = 0x44, TL = 0, interrupt_level_4 handler */ |
100 | /* TT = 0x44, TL = 0, interrupt_level_4 handler */ |
87 | .org trap_table + TT_INTERRUPT_LEVEL_4*ENTRY_SIZE |
101 | .org trap_table + TT_INTERRUPT_LEVEL_4*ENTRY_SIZE |
88 | .global interrupt_level_4_handler |
102 | .global interrupt_level_4_handler |
89 | interrupt_level_4_handler: |
103 | interrupt_level_4_handler: |
90 | INTERRUPT_LEVEL_N_HANDLER 4 |
104 | INTERRUPT_LEVEL_N_HANDLER 4 |
91 | 105 | ||
92 | /* TT = 0x45, TL = 0, interrupt_level_5 handler */ |
106 | /* TT = 0x45, TL = 0, interrupt_level_5 handler */ |
93 | .org trap_table + TT_INTERRUPT_LEVEL_5*ENTRY_SIZE |
107 | .org trap_table + TT_INTERRUPT_LEVEL_5*ENTRY_SIZE |
94 | .global interrupt_level_5_handler |
108 | .global interrupt_level_5_handler |
95 | interrupt_level_5_handler: |
109 | interrupt_level_5_handler: |
96 | INTERRUPT_LEVEL_N_HANDLER 5 |
110 | INTERRUPT_LEVEL_N_HANDLER 5 |
97 | 111 | ||
98 | /* TT = 0x46, TL = 0, interrupt_level_6 handler */ |
112 | /* TT = 0x46, TL = 0, interrupt_level_6 handler */ |
99 | .org trap_table + TT_INTERRUPT_LEVEL_6*ENTRY_SIZE |
113 | .org trap_table + TT_INTERRUPT_LEVEL_6*ENTRY_SIZE |
100 | .global interrupt_level_6_handler |
114 | .global interrupt_level_6_handler |
101 | interrupt_level_6_handler: |
115 | interrupt_level_6_handler: |
102 | INTERRUPT_LEVEL_N_HANDLER 6 |
116 | INTERRUPT_LEVEL_N_HANDLER 6 |
103 | 117 | ||
104 | /* TT = 0x47, TL = 0, interrupt_level_7 handler */ |
118 | /* TT = 0x47, TL = 0, interrupt_level_7 handler */ |
105 | .org trap_table + TT_INTERRUPT_LEVEL_7*ENTRY_SIZE |
119 | .org trap_table + TT_INTERRUPT_LEVEL_7*ENTRY_SIZE |
106 | .global interrupt_level_7_handler |
120 | .global interrupt_level_7_handler |
107 | interrupt_level_7_handler: |
121 | interrupt_level_7_handler: |
108 | INTERRUPT_LEVEL_N_HANDLER 7 |
122 | INTERRUPT_LEVEL_N_HANDLER 7 |
109 | 123 | ||
110 | /* TT = 0x48, TL = 0, interrupt_level_8 handler */ |
124 | /* TT = 0x48, TL = 0, interrupt_level_8 handler */ |
111 | .org trap_table + TT_INTERRUPT_LEVEL_8*ENTRY_SIZE |
125 | .org trap_table + TT_INTERRUPT_LEVEL_8*ENTRY_SIZE |
112 | .global interrupt_level_8_handler |
126 | .global interrupt_level_8_handler |
113 | interrupt_level_8_handler: |
127 | interrupt_level_8_handler: |
114 | INTERRUPT_LEVEL_N_HANDLER 8 |
128 | INTERRUPT_LEVEL_N_HANDLER 8 |
115 | 129 | ||
116 | /* TT = 0x49, TL = 0, interrupt_level_9 handler */ |
130 | /* TT = 0x49, TL = 0, interrupt_level_9 handler */ |
117 | .org trap_table + TT_INTERRUPT_LEVEL_9*ENTRY_SIZE |
131 | .org trap_table + TT_INTERRUPT_LEVEL_9*ENTRY_SIZE |
118 | .global interrupt_level_9_handler |
132 | .global interrupt_level_9_handler |
119 | interrupt_level_9_handler: |
133 | interrupt_level_9_handler: |
120 | INTERRUPT_LEVEL_N_HANDLER 9 |
134 | INTERRUPT_LEVEL_N_HANDLER 9 |
121 | 135 | ||
122 | /* TT = 0x4a, TL = 0, interrupt_level_10 handler */ |
136 | /* TT = 0x4a, TL = 0, interrupt_level_10 handler */ |
123 | .org trap_table + TT_INTERRUPT_LEVEL_10*ENTRY_SIZE |
137 | .org trap_table + TT_INTERRUPT_LEVEL_10*ENTRY_SIZE |
124 | .global interrupt_level_10_handler |
138 | .global interrupt_level_10_handler |
125 | interrupt_level_10_handler: |
139 | interrupt_level_10_handler: |
126 | INTERRUPT_LEVEL_N_HANDLER 10 |
140 | INTERRUPT_LEVEL_N_HANDLER 10 |
127 | 141 | ||
128 | /* TT = 0x4b, TL = 0, interrupt_level_11 handler */ |
142 | /* TT = 0x4b, TL = 0, interrupt_level_11 handler */ |
129 | .org trap_table + TT_INTERRUPT_LEVEL_11*ENTRY_SIZE |
143 | .org trap_table + TT_INTERRUPT_LEVEL_11*ENTRY_SIZE |
130 | .global interrupt_level_11_handler |
144 | .global interrupt_level_11_handler |
131 | interrupt_level_11_handler: |
145 | interrupt_level_11_handler: |
132 | INTERRUPT_LEVEL_N_HANDLER 11 |
146 | INTERRUPT_LEVEL_N_HANDLER 11 |
133 | 147 | ||
134 | /* TT = 0x4c, TL = 0, interrupt_level_12 handler */ |
148 | /* TT = 0x4c, TL = 0, interrupt_level_12 handler */ |
135 | .org trap_table + TT_INTERRUPT_LEVEL_12*ENTRY_SIZE |
149 | .org trap_table + TT_INTERRUPT_LEVEL_12*ENTRY_SIZE |
136 | .global interrupt_level_12_handler |
150 | .global interrupt_level_12_handler |
137 | interrupt_level_12_handler: |
151 | interrupt_level_12_handler: |
138 | INTERRUPT_LEVEL_N_HANDLER 12 |
152 | INTERRUPT_LEVEL_N_HANDLER 12 |
139 | 153 | ||
140 | /* TT = 0x4d, TL = 0, interrupt_level_13 handler */ |
154 | /* TT = 0x4d, TL = 0, interrupt_level_13 handler */ |
141 | .org trap_table + TT_INTERRUPT_LEVEL_13*ENTRY_SIZE |
155 | .org trap_table + TT_INTERRUPT_LEVEL_13*ENTRY_SIZE |
142 | .global interrupt_level_13_handler |
156 | .global interrupt_level_13_handler |
143 | interrupt_level_13_handler: |
157 | interrupt_level_13_handler: |
144 | INTERRUPT_LEVEL_N_HANDLER 13 |
158 | INTERRUPT_LEVEL_N_HANDLER 13 |
145 | 159 | ||
146 | /* TT = 0x4e, TL = 0, interrupt_level_14 handler */ |
160 | /* TT = 0x4e, TL = 0, interrupt_level_14 handler */ |
147 | .org trap_table + TT_INTERRUPT_LEVEL_14*ENTRY_SIZE |
161 | .org trap_table + TT_INTERRUPT_LEVEL_14*ENTRY_SIZE |
148 | .global interrupt_level_14_handler |
162 | .global interrupt_level_14_handler |
149 | interrupt_level_14_handler: |
163 | interrupt_level_14_handler: |
150 | INTERRUPT_LEVEL_N_HANDLER 14 |
164 | INTERRUPT_LEVEL_N_HANDLER 14 |
151 | 165 | ||
152 | /* TT = 0x4f, TL = 0, interrupt_level_15 handler */ |
166 | /* TT = 0x4f, TL = 0, interrupt_level_15 handler */ |
153 | .org trap_table + TT_INTERRUPT_LEVEL_15*ENTRY_SIZE |
167 | .org trap_table + TT_INTERRUPT_LEVEL_15*ENTRY_SIZE |
154 | .global interrupt_level_15_handler |
168 | .global interrupt_level_15_handler |
155 | interrupt_level_15_handler: |
169 | interrupt_level_15_handler: |
156 | INTERRUPT_LEVEL_N_HANDLER 15 |
170 | INTERRUPT_LEVEL_N_HANDLER 15 |
157 | 171 | ||
158 | /* TT = 0x60, TL = 0, interrupt_vector_trap handler */ |
172 | /* TT = 0x60, TL = 0, interrupt_vector_trap handler */ |
159 | .org trap_table + TT_INTERRUPT_VECTOR_TRAP*ENTRY_SIZE |
173 | .org trap_table + TT_INTERRUPT_VECTOR_TRAP*ENTRY_SIZE |
160 | .global interrupt_vector_trap_handler |
174 | .global interrupt_vector_trap_handler |
161 | interrupt_vector_trap_handler: |
175 | interrupt_vector_trap_handler: |
162 | INTERRUPT_VECTOR_TRAP_HANDLER |
176 | INTERRUPT_VECTOR_TRAP_HANDLER |
163 | 177 | ||
164 | /* TT = 0x80, TL = 0, spill_0_normal handler */ |
178 | /* TT = 0x80, TL = 0, spill_0_normal handler */ |
165 | .org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
179 | .org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
166 | .global spill_0_normal |
180 | .global spill_0_normal |
167 | spill_0_normal: |
181 | spill_0_normal: |
168 | SPILL_NORMAL_HANDLER |
182 | SPILL_NORMAL_HANDLER |
169 | 183 | ||
170 | /* TT = 0xc0, TL = 0, fill_0_normal handler */ |
184 | /* TT = 0xc0, TL = 0, fill_0_normal handler */ |
171 | .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
185 | .org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
172 | .global fill_0_normal |
186 | .global fill_0_normal |
173 | fill_0_normal: |
187 | fill_0_normal: |
174 | FILL_NORMAL_HANDLER |
188 | FILL_NORMAL_HANDLER |
175 | 189 | ||
176 | /* |
190 | /* |
177 | * Handlers for TL>0. |
191 | * Handlers for TL>0. |
178 | */ |
192 | */ |
179 | 193 | ||
- | 194 | /* TT = 0x08, TL > 0, instruction_access_exception */ |
|
- | 195 | .org trap_table + (TT_INSTRUCTION_ACCESS_EXCEPTION+512)*ENTRY_SIZE |
|
- | 196 | .global instruction_access_exception_high |
|
- | 197 | instruction_access_exception_high: |
|
- | 198 | SIMPLE_HANDLER do_instruction_access_exc |
|
- | 199 | ||
180 | /* TT = 0x24, TL > 0, clean_window handler */ |
200 | /* TT = 0x24, TL > 0, clean_window handler */ |
181 | .org trap_table + (TT_CLEAN_WINDOW+512)*ENTRY_SIZE |
201 | .org trap_table + (TT_CLEAN_WINDOW+512)*ENTRY_SIZE |
182 | .global clean_window_handler_high |
202 | .global clean_window_handler_high |
183 | clean_window_handler_high: |
203 | clean_window_handler_high: |
184 | CLEAN_WINDOW_HANDLER |
204 | CLEAN_WINDOW_HANDLER |
185 | 205 | ||
- | 206 | /* TT = 0x34, TL > 0, mem_address_not_aligned */ |
|
- | 207 | .org trap_table + (TT_MEM_ADDRESS_NOT_ALIGNED+512)*ENTRY_SIZE |
|
- | 208 | .global mem_address_not_aligned_high |
|
- | 209 | mem_address_not_aligned_high: |
|
- | 210 | SIMPLE_HANDLER do_mem_address_not_aligned |
|
186 | 211 | ||
187 | /* TT = 0x80, TL > 0, spill_0_normal handler */ |
212 | /* TT = 0x80, TL > 0, spill_0_normal handler */ |
188 | - | ||
189 | .org trap_table + (TT_SPILL_0_NORMAL+512)*ENTRY_SIZE |
213 | .org trap_table + (TT_SPILL_0_NORMAL+512)*ENTRY_SIZE |
190 | .global spill_0_normal_high |
214 | .global spill_0_normal_high |
191 | spill_0_normal_high: |
215 | spill_0_normal_high: |
192 | SPILL_NORMAL_HANDLER |
216 | SPILL_NORMAL_HANDLER |
193 | 217 | ||
194 | - | ||
195 | /* TT = 0xc0, TL > 0, fill_0_normal handler */ |
218 | /* TT = 0xc0, TL > 0, fill_0_normal handler */ |
196 | .org trap_table + (TT_FILL_0_NORMAL+512)*ENTRY_SIZE |
219 | .org trap_table + (TT_FILL_0_NORMAL+512)*ENTRY_SIZE |
197 | .global fill_0_normal_high |
220 | .global fill_0_normal_high |
198 | fill_0_normal_high: |
221 | fill_0_normal_high: |
199 | FILL_NORMAL_HANDLER |
222 | FILL_NORMAL_HANDLER |
200 | 223 | ||
201 | 224 | ||
202 | 225 | ||
203 | /* |
226 | /* |
204 | * Save trap table. |
227 | * Save trap table. |
205 | */ |
228 | */ |
206 | .align TABLE_SIZE |
229 | .align TABLE_SIZE |
207 | .global trap_table_save |
230 | .global trap_table_save |
208 | trap_table_save: |
231 | trap_table_save: |
209 | .space TABLE_SIZE, 0 |
232 | .space TABLE_SIZE, 0 |
210 | 233 | ||
211 | 234 | ||
- | 235 | /* Preemptible trap handler. |
|
- | 236 | * |
|
- | 237 | * This trap handler makes arrangements to |
|
- | 238 | * make calling scheduler() possible. |
|
- | 239 | * |
|
212 | /* Trap handler that explicitly saves global registers. |
240 | * The caller is responsible for doing save |
- | 241 | * and allocating PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE |
|
- | 242 | * bytes on stack. |
|
213 | * |
243 | * |
214 | * Input registers: |
244 | * Input registers: |
215 | * %l0 Address of function to call. |
245 | * %l0 Address of function to call. |
216 | * Output registers: |
246 | * Output registers: |
217 | * %l1 - %l7 Copy of %g1 - %g7 |
247 | * %l1 - %l7 Copy of %g1 - %g7 |
218 | */ |
248 | */ |
219 | .global saving_handler |
249 | .global preemptible_handler |
220 | saving_handler: |
250 | preemptible_handler: |
- | 251 | /* |
|
- | 252 | * Save TSTATE, TPC, TNPC and PSTATE aside. |
|
- | 253 | */ |
|
- | 254 | rdpr %tstate, %g1 |
|
- | 255 | rdpr %tpc, %g2 |
|
- | 256 | rdpr %tnpc, %g3 |
|
- | 257 | rdpr %pstate, %g4 |
|
- | 258 | ||
- | 259 | stx %g1, [%fp + STACK_BIAS + SAVED_TSTATE] |
|
- | 260 | stx %g2, [%fp + STACK_BIAS + SAVED_TPC] |
|
- | 261 | stx %g3, [%fp + STACK_BIAS + SAVED_TNPC] |
|
- | 262 | stx %g4, [%fp + STACK_BIAS + SAVED_PSTATE] |
|
- | 263 | ||
- | 264 | /* |
|
- | 265 | * Write 0 to TL. |
|
- | 266 | */ |
|
- | 267 | wrpr %g0, 0, %tl |
|
- | 268 | ||
- | 269 | /* |
|
- | 270 | * Alter PSTATE. |
|
- | 271 | * - switch to normal globals. |
|
- | 272 | */ |
|
- | 273 | and %g4, ~1, %g4 ! mask alternate globals |
|
- | 274 | wrpr %g4, 0, %pstate |
|
- | 275 | ||
- | 276 | /* |
|
- | 277 | * Save the normal globals. |
|
- | 278 | */ |
|
221 | SAVE_GLOBALS |
279 | SAVE_GLOBALS |
- | 280 | ||
- | 281 | /* |
|
- | 282 | * Call the higher-level handler. |
|
- | 283 | */ |
|
222 | call %l0 |
284 | call %l0 |
223 | nop |
285 | nop |
- | 286 | ||
- | 287 | /* |
|
- | 288 | * Restore the normal global register set. |
|
- | 289 | */ |
|
224 | RESTORE_GLOBALS |
290 | RESTORE_GLOBALS |
- | 291 | ||
- | 292 | /* |
|
- | 293 | * Restore PSTATE from saved copy. |
|
- | 294 | * Alternate globals become active. |
|
- | 295 | */ |
|
- | 296 | ldx [%fp + STACK_BIAS + SAVED_PSTATE], %l4 |
|
- | 297 | wrpr %l4, 0, %pstate |
|
- | 298 | ||
- | 299 | /* |
|
- | 300 | * Write 1 to TL. |
|
- | 301 | */ |
|
- | 302 | wrpr %g0, 1, %tl |
|
- | 303 | ||
- | 304 | /* |
|
- | 305 | * Read TSTATE, TPC and TNPC from saved copy. |
|
- | 306 | */ |
|
- | 307 | ldx [%fp + STACK_BIAS + SAVED_TSTATE], %g1 |
|
- | 308 | ldx [%fp + STACK_BIAS + SAVED_TPC], %g2 |
|
- | 309 | ldx [%fp + STACK_BIAS + SAVED_TNPC], %g3 |
|
- | 310 | ||
- | 311 | /* |
|
225 | restore /* matches the save instruction from the top-level handler */ |
312 | * Do restore to match the save instruction from the top-level handler. |
- | 313 | */ |
|
- | 314 | restore |
|
- | 315 | ||
- | 316 | /* |
|
- | 317 | * On execution of retry instruction, CWP will be restored from TSTATE register. |
|
- | 318 | * However, because of scheduling, it is possible that CWP in saved TSTATE |
|
- | 319 | * is different from current CWP. The following chunk of code fixes CWP |
|
- | 320 | * in the saved copy of TSTATE. |
|
- | 321 | */ |
|
- | 322 | rdpr %cwp, %g4 ! read current CWP |
|
- | 323 | and %g1, ~0x1f, %g1 ! clear CWP field in saved TSTATE |
|
- | 324 | or %g1, %g4, %g1 ! write current CWP to TSTATE |
|
- | 325 | ||
- | 326 | /* |
|
- | 327 | * Restore TSTATE, TPC and TNPC from saved copies. |
|
- | 328 | */ |
|
- | 329 | wrpr %g1, 0, %tstate |
|
- | 330 | wrpr %g2, 0, %tpc |
|
- | 331 | wrpr %g3, 0, %tnpc |
|
- | 332 | ||
- | 333 | /* |
|
- | 334 | * Return from interrupt. |
|
- | 335 | */ |
|
226 | retry |
336 | retry |
227 | 337 | ||
228 | 338 | ||
229 |
|
339 |
|
230 | 340 | ||
231 | 341 | ||
232 | 342 |