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b34f6357 | 1 | /* frv exception and interrupt support |
c5a57081 | 2 | Copyright (C) 1999-2001, 2007-2012 Free Software Foundation, Inc. |
b34f6357 DB |
3 | Contributed by Red Hat. |
4 | ||
5 | This file is part of the GNU simulators. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
4744ac1b JB |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
b34f6357 DB |
11 | |
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
4744ac1b JB |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
b34f6357 DB |
19 | |
20 | #define WANT_CPU frvbf | |
21 | #define WANT_CPU_FRVBF | |
22 | ||
23 | #include "sim-main.h" | |
24 | #include "bfd.h" | |
25 | ||
26 | /* FR-V Interrupt table. | |
27 | Describes the interrupts supported by the FR-V. | |
28 | This table *must* be maintained in order of interrupt priority as defined by | |
29 | frv_interrupt_kind. */ | |
30 | #define DEFERRED 1 | |
31 | #define PRECISE 1 | |
32 | #define ITABLE_ENTRY(name, class, deferral, precision, offset) \ | |
33 | {FRV_##name, FRV_EC_##name, class, deferral, precision, offset} | |
34 | ||
35 | struct frv_interrupt frv_interrupt_table[NUM_FRV_INTERRUPT_KINDS] = | |
36 | { | |
37 | /* External interrupts */ | |
38 | ITABLE_ENTRY(INTERRUPT_LEVEL_1, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x21), | |
39 | ITABLE_ENTRY(INTERRUPT_LEVEL_2, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x22), | |
40 | ITABLE_ENTRY(INTERRUPT_LEVEL_3, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x23), | |
41 | ITABLE_ENTRY(INTERRUPT_LEVEL_4, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x24), | |
42 | ITABLE_ENTRY(INTERRUPT_LEVEL_5, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x25), | |
43 | ITABLE_ENTRY(INTERRUPT_LEVEL_6, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x26), | |
44 | ITABLE_ENTRY(INTERRUPT_LEVEL_7, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x27), | |
45 | ITABLE_ENTRY(INTERRUPT_LEVEL_8, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x28), | |
46 | ITABLE_ENTRY(INTERRUPT_LEVEL_9, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x29), | |
47 | ITABLE_ENTRY(INTERRUPT_LEVEL_10, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2a), | |
48 | ITABLE_ENTRY(INTERRUPT_LEVEL_11, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2b), | |
49 | ITABLE_ENTRY(INTERRUPT_LEVEL_12, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2c), | |
50 | ITABLE_ENTRY(INTERRUPT_LEVEL_13, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2d), | |
51 | ITABLE_ENTRY(INTERRUPT_LEVEL_14, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2e), | |
52 | ITABLE_ENTRY(INTERRUPT_LEVEL_15, FRV_EXTERNAL_INTERRUPT, !DEFERRED, !PRECISE, 0x2f), | |
53 | /* Software interrupt */ | |
54 | ITABLE_ENTRY(TRAP_INSTRUCTION, FRV_SOFTWARE_INTERRUPT, !DEFERRED, !PRECISE, 0x80), | |
55 | /* Program interrupts */ | |
56 | ITABLE_ENTRY(COMMIT_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x19), | |
57 | ITABLE_ENTRY(DIVISION_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x17), | |
58 | ITABLE_ENTRY(DATA_STORE_ERROR, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x14), | |
59 | ITABLE_ENTRY(DATA_ACCESS_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x13), | |
60 | ITABLE_ENTRY(DATA_ACCESS_MMU_MISS, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x12), | |
61 | ITABLE_ENTRY(DATA_ACCESS_ERROR, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x11), | |
62 | ITABLE_ENTRY(MP_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x0e), | |
63 | ITABLE_ENTRY(FP_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x0d), | |
64 | ITABLE_ENTRY(MEM_ADDRESS_NOT_ALIGNED, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x10), | |
65 | ITABLE_ENTRY(REGISTER_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x08), | |
66 | ITABLE_ENTRY(MP_DISABLED, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x0b), | |
67 | ITABLE_ENTRY(FP_DISABLED, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x0a), | |
68 | ITABLE_ENTRY(PRIVILEGED_INSTRUCTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x06), | |
69 | ITABLE_ENTRY(ILLEGAL_INSTRUCTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x07), | |
70 | ITABLE_ENTRY(INSTRUCTION_ACCESS_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x03), | |
71 | ITABLE_ENTRY(INSTRUCTION_ACCESS_ERROR, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x02), | |
72 | ITABLE_ENTRY(INSTRUCTION_ACCESS_MMU_MISS, FRV_PROGRAM_INTERRUPT, !DEFERRED, PRECISE, 0x01), | |
73 | ITABLE_ENTRY(COMPOUND_EXCEPTION, FRV_PROGRAM_INTERRUPT, !DEFERRED, !PRECISE, 0x20), | |
74 | /* Break interrupt */ | |
75 | ITABLE_ENTRY(BREAK_EXCEPTION, FRV_BREAK_INTERRUPT, !DEFERRED, !PRECISE, 0xff), | |
76 | /* Reset interrupt */ | |
77 | ITABLE_ENTRY(RESET, FRV_RESET_INTERRUPT, !DEFERRED, !PRECISE, 0x00) | |
78 | }; | |
79 | ||
80 | /* The current interrupt state. */ | |
81 | struct frv_interrupt_state frv_interrupt_state; | |
82 | ||
83 | /* maintain the address of the start of the previous VLIW insn sequence. */ | |
84 | IADDR previous_vliw_pc; | |
85 | ||
86 | /* Add a break interrupt to the interrupt queue. */ | |
87 | struct frv_interrupt_queue_element * | |
88 | frv_queue_break_interrupt (SIM_CPU *current_cpu) | |
89 | { | |
90 | return frv_queue_interrupt (current_cpu, FRV_BREAK_EXCEPTION); | |
91 | } | |
92 | ||
93 | /* Add a software interrupt to the interrupt queue. */ | |
94 | struct frv_interrupt_queue_element * | |
95 | frv_queue_software_interrupt (SIM_CPU *current_cpu, SI offset) | |
96 | { | |
97 | struct frv_interrupt_queue_element *new_element | |
98 | = frv_queue_interrupt (current_cpu, FRV_TRAP_INSTRUCTION); | |
99 | ||
100 | struct frv_interrupt *interrupt = & frv_interrupt_table[new_element->kind]; | |
101 | interrupt->handler_offset = offset; | |
102 | ||
103 | return new_element; | |
104 | } | |
105 | ||
106 | /* Add a program interrupt to the interrupt queue. */ | |
107 | struct frv_interrupt_queue_element * | |
108 | frv_queue_program_interrupt ( | |
109 | SIM_CPU *current_cpu, enum frv_interrupt_kind kind | |
110 | ) | |
111 | { | |
112 | return frv_queue_interrupt (current_cpu, kind); | |
113 | } | |
114 | ||
115 | /* Add an external interrupt to the interrupt queue. */ | |
116 | struct frv_interrupt_queue_element * | |
117 | frv_queue_external_interrupt ( | |
118 | SIM_CPU *current_cpu, enum frv_interrupt_kind kind | |
119 | ) | |
120 | { | |
121 | if (! GET_H_PSR_ET () | |
122 | || (kind != FRV_INTERRUPT_LEVEL_15 && kind < GET_H_PSR_PIL ())) | |
123 | return NULL; /* Leave it for later. */ | |
124 | ||
125 | return frv_queue_interrupt (current_cpu, kind); | |
126 | } | |
127 | ||
128 | /* Add any interrupt to the interrupt queue. It will be added in reverse | |
129 | priority order. This makes it easy to find the highest priority interrupt | |
130 | at the end of the queue and to remove it after processing. */ | |
131 | struct frv_interrupt_queue_element * | |
132 | frv_queue_interrupt (SIM_CPU *current_cpu, enum frv_interrupt_kind kind) | |
133 | { | |
134 | int i; | |
135 | int j; | |
136 | int limit = frv_interrupt_state.queue_index; | |
137 | struct frv_interrupt_queue_element *new_element; | |
138 | enum frv_interrupt_class iclass; | |
139 | ||
140 | if (limit >= FRV_INTERRUPT_QUEUE_SIZE) | |
141 | abort (); /* TODO: Make the queue dynamic */ | |
142 | ||
143 | /* Find the right place in the queue. */ | |
144 | for (i = 0; i < limit; ++i) | |
145 | { | |
146 | if (frv_interrupt_state.queue[i].kind >= kind) | |
147 | break; | |
148 | } | |
149 | ||
150 | /* Don't queue two external interrupts of the same priority. */ | |
151 | iclass = frv_interrupt_table[kind].iclass; | |
152 | if (i < limit && iclass == FRV_EXTERNAL_INTERRUPT) | |
153 | { | |
154 | if (frv_interrupt_state.queue[i].kind == kind) | |
155 | return & frv_interrupt_state.queue[i]; | |
156 | } | |
157 | ||
158 | /* Make room for the new interrupt in this spot. */ | |
159 | for (j = limit - 1; j >= i; --j) | |
160 | frv_interrupt_state.queue[j + 1] = frv_interrupt_state.queue[j]; | |
161 | ||
162 | /* Add the new interrupt. */ | |
163 | frv_interrupt_state.queue_index++; | |
164 | new_element = & frv_interrupt_state.queue[i]; | |
165 | new_element->kind = kind; | |
166 | new_element->vpc = CPU_PC_GET (current_cpu); | |
167 | new_element->u.data_written.length = 0; | |
168 | frv_set_interrupt_queue_slot (current_cpu, new_element); | |
169 | ||
170 | return new_element; | |
171 | } | |
172 | ||
173 | struct frv_interrupt_queue_element * | |
174 | frv_queue_register_exception_interrupt (SIM_CPU *current_cpu, enum frv_rec rec) | |
175 | { | |
176 | struct frv_interrupt_queue_element *new_element = | |
177 | frv_queue_program_interrupt (current_cpu, FRV_REGISTER_EXCEPTION); | |
178 | ||
179 | new_element->u.rec = rec; | |
180 | ||
181 | return new_element; | |
182 | } | |
183 | ||
184 | struct frv_interrupt_queue_element * | |
185 | frv_queue_mem_address_not_aligned_interrupt (SIM_CPU *current_cpu, USI addr) | |
186 | { | |
187 | struct frv_interrupt_queue_element *new_element; | |
188 | USI isr = GET_ISR (); | |
189 | ||
190 | /* Make sure that this exception is not masked. */ | |
191 | if (GET_ISR_EMAM (isr)) | |
192 | return NULL; | |
193 | ||
194 | /* Queue the interrupt. */ | |
195 | new_element = frv_queue_program_interrupt (current_cpu, | |
196 | FRV_MEM_ADDRESS_NOT_ALIGNED); | |
197 | new_element->eaddress = addr; | |
198 | new_element->u.data_written = frv_interrupt_state.data_written; | |
199 | frv_interrupt_state.data_written.length = 0; | |
200 | ||
201 | return new_element; | |
202 | } | |
203 | ||
204 | struct frv_interrupt_queue_element * | |
205 | frv_queue_data_access_error_interrupt (SIM_CPU *current_cpu, USI addr) | |
206 | { | |
207 | struct frv_interrupt_queue_element *new_element; | |
208 | new_element = frv_queue_program_interrupt (current_cpu, | |
209 | FRV_DATA_ACCESS_ERROR); | |
210 | new_element->eaddress = addr; | |
211 | return new_element; | |
212 | } | |
213 | ||
214 | struct frv_interrupt_queue_element * | |
215 | frv_queue_data_access_exception_interrupt (SIM_CPU *current_cpu) | |
216 | { | |
217 | return frv_queue_program_interrupt (current_cpu, FRV_DATA_ACCESS_EXCEPTION); | |
218 | } | |
219 | ||
220 | struct frv_interrupt_queue_element * | |
221 | frv_queue_instruction_access_error_interrupt (SIM_CPU *current_cpu) | |
222 | { | |
223 | return frv_queue_program_interrupt (current_cpu, FRV_INSTRUCTION_ACCESS_ERROR); | |
224 | } | |
225 | ||
226 | struct frv_interrupt_queue_element * | |
227 | frv_queue_instruction_access_exception_interrupt (SIM_CPU *current_cpu) | |
228 | { | |
229 | return frv_queue_program_interrupt (current_cpu, FRV_INSTRUCTION_ACCESS_EXCEPTION); | |
230 | } | |
231 | ||
232 | struct frv_interrupt_queue_element * | |
233 | frv_queue_illegal_instruction_interrupt ( | |
234 | SIM_CPU *current_cpu, const CGEN_INSN *insn | |
235 | ) | |
236 | { | |
b34f6357 | 237 | SIM_DESC sd = CPU_STATE (current_cpu); |
e930b1f5 | 238 | switch (STATE_ARCHITECTURE (sd)->mach) |
b34f6357 | 239 | { |
e930b1f5 | 240 | case bfd_mach_fr400: |
676a64f4 | 241 | case bfd_mach_fr450: |
e930b1f5 DB |
242 | case bfd_mach_fr550: |
243 | break; | |
244 | default: | |
245 | /* Some machines generate fp_exception for this case. */ | |
b34f6357 DB |
246 | if (frv_is_float_insn (insn) || frv_is_media_insn (insn)) |
247 | { | |
248 | struct frv_fp_exception_info fp_info = { | |
249 | FSR_NO_EXCEPTION, FTT_SEQUENCE_ERROR | |
250 | }; | |
251 | return frv_queue_fp_exception_interrupt (current_cpu, & fp_info); | |
252 | } | |
e930b1f5 | 253 | break; |
b34f6357 DB |
254 | } |
255 | ||
256 | return frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION); | |
257 | } | |
258 | ||
e930b1f5 DB |
259 | struct frv_interrupt_queue_element * |
260 | frv_queue_privileged_instruction_interrupt (SIM_CPU *current_cpu, const CGEN_INSN *insn) | |
261 | { | |
262 | /* The fr550 has no privileged instruction interrupt. It uses | |
263 | illegal_instruction. */ | |
264 | SIM_DESC sd = CPU_STATE (current_cpu); | |
265 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
266 | return frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION); | |
267 | ||
268 | return frv_queue_program_interrupt (current_cpu, FRV_PRIVILEGED_INSTRUCTION); | |
269 | } | |
270 | ||
271 | struct frv_interrupt_queue_element * | |
272 | frv_queue_float_disabled_interrupt (SIM_CPU *current_cpu) | |
273 | { | |
274 | /* The fr550 has no fp_disabled interrupt. It uses illegal_instruction. */ | |
275 | SIM_DESC sd = CPU_STATE (current_cpu); | |
276 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
277 | return frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION); | |
278 | ||
279 | return frv_queue_program_interrupt (current_cpu, FRV_FP_DISABLED); | |
280 | } | |
281 | ||
282 | struct frv_interrupt_queue_element * | |
283 | frv_queue_media_disabled_interrupt (SIM_CPU *current_cpu) | |
284 | { | |
285 | /* The fr550 has no mp_disabled interrupt. It uses illegal_instruction. */ | |
286 | SIM_DESC sd = CPU_STATE (current_cpu); | |
287 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
288 | return frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION); | |
289 | ||
290 | return frv_queue_program_interrupt (current_cpu, FRV_MP_DISABLED); | |
291 | } | |
292 | ||
b34f6357 DB |
293 | struct frv_interrupt_queue_element * |
294 | frv_queue_non_implemented_instruction_interrupt ( | |
295 | SIM_CPU *current_cpu, const CGEN_INSN *insn | |
296 | ) | |
297 | { | |
b34f6357 | 298 | SIM_DESC sd = CPU_STATE (current_cpu); |
e930b1f5 | 299 | switch (STATE_ARCHITECTURE (sd)->mach) |
b34f6357 | 300 | { |
e930b1f5 | 301 | case bfd_mach_fr400: |
676a64f4 | 302 | case bfd_mach_fr450: |
e930b1f5 DB |
303 | case bfd_mach_fr550: |
304 | break; | |
305 | default: | |
306 | /* Some machines generate fp_exception or mp_exception for this case. */ | |
b34f6357 DB |
307 | if (frv_is_float_insn (insn)) |
308 | { | |
309 | struct frv_fp_exception_info fp_info = { | |
310 | FSR_NO_EXCEPTION, FTT_UNIMPLEMENTED_FPOP | |
311 | }; | |
312 | return frv_queue_fp_exception_interrupt (current_cpu, & fp_info); | |
313 | } | |
b34f6357 DB |
314 | if (frv_is_media_insn (insn)) |
315 | { | |
316 | frv_set_mp_exception_registers (current_cpu, MTT_UNIMPLEMENTED_MPOP, | |
317 | 0); | |
318 | return NULL; /* no interrupt queued at this time. */ | |
319 | } | |
e930b1f5 | 320 | break; |
b34f6357 DB |
321 | } |
322 | ||
323 | return frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION); | |
324 | } | |
325 | ||
326 | /* Queue the given fp_exception interrupt. Also update fp_info by removing | |
327 | masked interrupts and updating the 'slot' flield. */ | |
328 | struct frv_interrupt_queue_element * | |
329 | frv_queue_fp_exception_interrupt ( | |
330 | SIM_CPU *current_cpu, struct frv_fp_exception_info *fp_info | |
331 | ) | |
332 | { | |
333 | SI fsr0 = GET_FSR (0); | |
334 | int tem = GET_FSR_TEM (fsr0); | |
335 | int aexc = GET_FSR_AEXC (fsr0); | |
336 | struct frv_interrupt_queue_element *new_element = NULL; | |
337 | ||
338 | /* Update AEXC with the interrupts that are masked. */ | |
339 | aexc |= fp_info->fsr_mask & ~tem; | |
340 | SET_FSR_AEXC (fsr0, aexc); | |
341 | SET_FSR (0, fsr0); | |
342 | ||
343 | /* update fsr_mask with the exceptions that are enabled. */ | |
344 | fp_info->fsr_mask &= tem; | |
345 | ||
346 | /* If there is an unmasked interrupt then queue it, unless | |
347 | this was a non-excepting insn, in which case simply set the NE | |
348 | status registers. */ | |
349 | if (frv_interrupt_state.ne_index != NE_NOFLAG | |
350 | && fp_info->fsr_mask != FSR_NO_EXCEPTION) | |
351 | { | |
352 | SET_NE_FLAG (frv_interrupt_state.f_ne_flags, | |
353 | frv_interrupt_state.ne_index); | |
354 | /* TODO -- Set NESR for chips which support it. */ | |
355 | new_element = NULL; | |
356 | } | |
357 | else if (fp_info->fsr_mask != FSR_NO_EXCEPTION | |
358 | || fp_info->ftt == FTT_UNIMPLEMENTED_FPOP | |
359 | || fp_info->ftt == FTT_SEQUENCE_ERROR | |
360 | || fp_info->ftt == FTT_INVALID_FR) | |
361 | { | |
362 | new_element = frv_queue_program_interrupt (current_cpu, FRV_FP_EXCEPTION); | |
363 | new_element->u.fp_info = *fp_info; | |
364 | } | |
365 | ||
366 | return new_element; | |
367 | } | |
368 | ||
369 | struct frv_interrupt_queue_element * | |
370 | frv_queue_division_exception_interrupt (SIM_CPU *current_cpu, enum frv_dtt dtt) | |
371 | { | |
372 | struct frv_interrupt_queue_element *new_element = | |
373 | frv_queue_program_interrupt (current_cpu, FRV_DIVISION_EXCEPTION); | |
374 | ||
375 | new_element->u.dtt = dtt; | |
376 | ||
377 | return new_element; | |
378 | } | |
379 | ||
380 | /* Check for interrupts caused by illegal insn access. These conditions are | |
381 | checked in the order specified by the fr400 and fr500 LSI specs. */ | |
382 | void | |
383 | frv_detect_insn_access_interrupts (SIM_CPU *current_cpu, SCACHE *sc) | |
384 | { | |
385 | ||
386 | const CGEN_INSN *insn = sc->argbuf.idesc->idata; | |
387 | SIM_DESC sd = CPU_STATE (current_cpu); | |
388 | FRV_VLIW *vliw = CPU_VLIW (current_cpu); | |
389 | ||
390 | /* Check for vliw constraints. */ | |
391 | if (vliw->constraint_violation) | |
392 | frv_queue_illegal_instruction_interrupt (current_cpu, insn); | |
393 | /* Check for non-excepting insns. */ | |
394 | else if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_NON_EXCEPTING) | |
395 | && ! GET_H_PSR_NEM ()) | |
396 | frv_queue_non_implemented_instruction_interrupt (current_cpu, insn); | |
397 | /* Check for conditional insns. */ | |
398 | else if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_CONDITIONAL) | |
399 | && ! GET_H_PSR_CM ()) | |
400 | frv_queue_non_implemented_instruction_interrupt (current_cpu, insn); | |
401 | /* Make sure floating point support is enabled. */ | |
402 | else if (! GET_H_PSR_EF ()) | |
403 | { | |
404 | /* Generate fp_disabled if it is a floating point insn or if PSR.EM is | |
405 | off and the insns accesses a fp register. */ | |
406 | if (frv_is_float_insn (insn) | |
407 | || (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_FR_ACCESS) | |
408 | && ! GET_H_PSR_EM ())) | |
e930b1f5 | 409 | frv_queue_float_disabled_interrupt (current_cpu); |
b34f6357 DB |
410 | } |
411 | /* Make sure media support is enabled. */ | |
412 | else if (! GET_H_PSR_EM ()) | |
413 | { | |
414 | /* Generate mp_disabled if it is a media insn. */ | |
415 | if (frv_is_media_insn (insn) || CGEN_INSN_NUM (insn) == FRV_INSN_MTRAP) | |
e930b1f5 | 416 | frv_queue_media_disabled_interrupt (current_cpu); |
b34f6357 DB |
417 | } |
418 | /* Check for privileged insns. */ | |
419 | else if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_PRIVILEGED) && | |
420 | ! GET_H_PSR_S ()) | |
e930b1f5 | 421 | frv_queue_privileged_instruction_interrupt (current_cpu, insn); |
b34f6357 DB |
422 | #if 0 /* disable for now until we find out how FSR0.QNE gets reset. */ |
423 | else | |
424 | { | |
425 | /* Enter the halt state if FSR0.QNE is set and we are executing a | |
426 | floating point insn, a media insn or an insn which access a FR | |
427 | register. */ | |
428 | SI fsr0 = GET_FSR (0); | |
429 | if (GET_FSR_QNE (fsr0) | |
430 | && (frv_is_float_insn (insn) || frv_is_media_insn (insn) | |
431 | || CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_FR_ACCESS))) | |
432 | { | |
433 | sim_engine_halt (sd, current_cpu, NULL, GET_H_PC (), sim_stopped, | |
434 | SIM_SIGINT); | |
435 | } | |
436 | } | |
437 | #endif | |
438 | } | |
439 | ||
440 | /* Record the current VLIW slot in the given interrupt queue element. */ | |
441 | void | |
442 | frv_set_interrupt_queue_slot ( | |
443 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
444 | ) | |
445 | { | |
446 | FRV_VLIW *vliw = CPU_VLIW (current_cpu); | |
447 | int slot = vliw->next_slot - 1; | |
448 | item->slot = (*vliw->current_vliw)[slot]; | |
449 | } | |
450 | ||
451 | /* Handle an individual interrupt. */ | |
452 | static void | |
453 | handle_interrupt (SIM_CPU *current_cpu, IADDR pc) | |
454 | { | |
455 | struct frv_interrupt *interrupt; | |
456 | int writeback_done = 0; | |
457 | while (1) | |
458 | { | |
459 | /* Interrupts are queued in priority order with the highest priority | |
460 | last. */ | |
461 | int index = frv_interrupt_state.queue_index - 1; | |
462 | struct frv_interrupt_queue_element *item | |
463 | = & frv_interrupt_state.queue[index]; | |
464 | interrupt = & frv_interrupt_table[item->kind]; | |
465 | ||
466 | switch (interrupt->iclass) | |
467 | { | |
468 | case FRV_EXTERNAL_INTERRUPT: | |
469 | /* Perform writeback first. This may cause a higher priority | |
470 | interrupt. */ | |
471 | if (! writeback_done) | |
472 | { | |
473 | frvbf_perform_writeback (current_cpu); | |
474 | writeback_done = 1; | |
475 | continue; | |
476 | } | |
477 | frv_external_interrupt (current_cpu, item, pc); | |
478 | return; | |
479 | case FRV_SOFTWARE_INTERRUPT: | |
480 | frv_interrupt_state.queue_index = index; | |
481 | frv_software_interrupt (current_cpu, item, pc); | |
482 | return; | |
483 | case FRV_PROGRAM_INTERRUPT: | |
484 | /* If the program interrupt is not strict (imprecise), then perform | |
485 | writeback first. This may, in turn, cause a higher priority | |
486 | interrupt. */ | |
487 | if (! interrupt->precise && ! writeback_done) | |
488 | { | |
489 | frv_interrupt_state.imprecise_interrupt = item; | |
490 | frvbf_perform_writeback (current_cpu); | |
491 | writeback_done = 1; | |
492 | continue; | |
493 | } | |
494 | frv_interrupt_state.queue_index = index; | |
495 | frv_program_interrupt (current_cpu, item, pc); | |
496 | return; | |
497 | case FRV_BREAK_INTERRUPT: | |
498 | frv_interrupt_state.queue_index = index; | |
499 | frv_break_interrupt (current_cpu, interrupt, pc); | |
500 | return; | |
501 | case FRV_RESET_INTERRUPT: | |
502 | break; | |
503 | default: | |
504 | break; | |
505 | } | |
506 | frv_interrupt_state.queue_index = index; | |
507 | break; /* out of loop. */ | |
508 | } | |
509 | ||
510 | /* We should never get here. */ | |
511 | { | |
512 | SIM_DESC sd = CPU_STATE (current_cpu); | |
513 | sim_engine_abort (sd, current_cpu, pc, | |
514 | "interrupt class not supported %d\n", | |
515 | interrupt->iclass); | |
516 | } | |
517 | } | |
518 | ||
519 | /* Check to see the if the RSTR.HR or RSTR.SR bits have been set. If so, handle | |
520 | the appropriate reset interrupt. */ | |
521 | static int | |
522 | check_reset (SIM_CPU *current_cpu, IADDR pc) | |
523 | { | |
524 | int hsr0; | |
525 | int hr; | |
526 | int sr; | |
527 | SI rstr; | |
528 | FRV_CACHE *cache = CPU_DATA_CACHE (current_cpu); | |
529 | IADDR address = RSTR_ADDRESS; | |
530 | ||
531 | /* We don't want this to show up in the cache statistics, so read the | |
532 | cache passively. */ | |
533 | if (! frv_cache_read_passive_SI (cache, address, & rstr)) | |
534 | rstr = sim_core_read_unaligned_4 (current_cpu, pc, read_map, address); | |
535 | ||
536 | hr = GET_RSTR_HR (rstr); | |
537 | sr = GET_RSTR_SR (rstr); | |
538 | ||
539 | if (! hr && ! sr) | |
540 | return 0; /* no reset. */ | |
541 | ||
542 | /* Reinitialize the machine state. */ | |
543 | if (hr) | |
544 | frv_hardware_reset (current_cpu); | |
545 | else | |
546 | frv_software_reset (current_cpu); | |
547 | ||
548 | /* Branch to the reset address. */ | |
549 | hsr0 = GET_HSR0 (); | |
550 | if (GET_HSR0_SA (hsr0)) | |
551 | SET_H_PC (0xff000000); | |
552 | else | |
553 | SET_H_PC (0); | |
554 | ||
555 | return 1; /* reset */ | |
556 | } | |
557 | ||
558 | /* Process any pending interrupt(s) after a group of parallel insns. */ | |
559 | void | |
560 | frv_process_interrupts (SIM_CPU *current_cpu) | |
561 | { | |
562 | SI NE_flags[2]; | |
563 | /* Need to save the pc here because writeback may change it (due to a | |
564 | branch). */ | |
565 | IADDR pc = CPU_PC_GET (current_cpu); | |
566 | ||
567 | /* Check for a reset before anything else. */ | |
568 | if (check_reset (current_cpu, pc)) | |
569 | return; | |
570 | ||
571 | /* First queue the writes for any accumulated NE flags. */ | |
572 | if (frv_interrupt_state.f_ne_flags[0] != 0 | |
573 | || frv_interrupt_state.f_ne_flags[1] != 0) | |
574 | { | |
575 | GET_NE_FLAGS (NE_flags, H_SPR_FNER0); | |
576 | NE_flags[0] |= frv_interrupt_state.f_ne_flags[0]; | |
577 | NE_flags[1] |= frv_interrupt_state.f_ne_flags[1]; | |
578 | SET_NE_FLAGS (H_SPR_FNER0, NE_flags); | |
579 | } | |
580 | ||
581 | /* If there is no interrupt pending, then perform parallel writeback. This | |
582 | may cause an interrupt. */ | |
583 | if (frv_interrupt_state.queue_index <= 0) | |
584 | frvbf_perform_writeback (current_cpu); | |
585 | ||
586 | /* If there is an interrupt pending, then process it. */ | |
587 | if (frv_interrupt_state.queue_index > 0) | |
588 | handle_interrupt (current_cpu, pc); | |
589 | } | |
590 | ||
591 | /* Find the next available ESR and return its index */ | |
592 | static int | |
593 | esr_for_data_access_exception ( | |
594 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
595 | ) | |
596 | { | |
e930b1f5 DB |
597 | SIM_DESC sd = CPU_STATE (current_cpu); |
598 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
599 | return 8; /* Use ESR8, EPCR8. */ | |
600 | ||
b34f6357 DB |
601 | if (item->slot == UNIT_I0) |
602 | return 8; /* Use ESR8, EPCR8, EAR8, EDR8. */ | |
603 | ||
604 | return 9; /* Use ESR9, EPCR9, EAR9. */ | |
605 | } | |
606 | ||
607 | /* Set the next available EDR register with the data which was to be stored | |
608 | and return the index of the register. */ | |
609 | static int | |
610 | set_edr_register ( | |
611 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item, int edr_index | |
612 | ) | |
613 | { | |
614 | /* EDR0, EDR4 and EDR8 are available as blocks of 4. | |
615 | SI data uses EDR3, EDR7 and EDR11 | |
616 | DI data uses EDR2, EDR6 and EDR10 | |
617 | XI data uses EDR0, EDR4 and EDR8. */ | |
618 | int i; | |
619 | edr_index += 4 - item->u.data_written.length; | |
620 | for (i = 0; i < item->u.data_written.length; ++i) | |
621 | SET_EDR (edr_index + i, item->u.data_written.words[i]); | |
622 | ||
623 | return edr_index; | |
624 | }; | |
625 | ||
626 | /* Clear ESFR0, EPCRx, ESRx, EARx and EDRx. */ | |
627 | static void | |
628 | clear_exception_status_registers (SIM_CPU *current_cpu) | |
629 | { | |
630 | int i; | |
631 | /* It is only necessary to clear the flag bits indicating which registers | |
632 | are valid. */ | |
633 | SET_ESFR (0, 0); | |
634 | SET_ESFR (1, 0); | |
635 | ||
636 | for (i = 0; i <= 2; ++i) | |
637 | { | |
638 | SI esr = GET_ESR (i); | |
639 | CLEAR_ESR_VALID (esr); | |
640 | SET_ESR (i, esr); | |
641 | } | |
e930b1f5 | 642 | for (i = 8; i <= 15; ++i) |
b34f6357 DB |
643 | { |
644 | SI esr = GET_ESR (i); | |
645 | CLEAR_ESR_VALID (esr); | |
646 | SET_ESR (i, esr); | |
647 | } | |
648 | } | |
649 | ||
650 | /* Record state for media exception. */ | |
651 | void | |
652 | frv_set_mp_exception_registers ( | |
653 | SIM_CPU *current_cpu, enum frv_msr_mtt mtt, int sie | |
654 | ) | |
655 | { | |
656 | /* Record the interrupt factor in MSR0. */ | |
657 | SI msr0 = GET_MSR (0); | |
658 | if (GET_MSR_MTT (msr0) == MTT_NONE) | |
659 | SET_MSR_MTT (msr0, mtt); | |
660 | ||
661 | /* Also set the OVF bit in the appropriate MSR as well as MSR0.AOVF. */ | |
662 | if (mtt == MTT_OVERFLOW) | |
663 | { | |
664 | FRV_VLIW *vliw = CPU_VLIW (current_cpu); | |
665 | int slot = vliw->next_slot - 1; | |
e930b1f5 | 666 | SIM_DESC sd = CPU_STATE (current_cpu); |
b34f6357 DB |
667 | |
668 | /* If this insn is in the M2 slot, then set MSR1.OVF and MSR1.SIE, | |
669 | otherwise set MSR0.OVF and MSR0.SIE. */ | |
e930b1f5 | 670 | if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550 && (*vliw->current_vliw)[slot] == UNIT_FM1) |
b34f6357 DB |
671 | { |
672 | SI msr = GET_MSR (1); | |
673 | OR_MSR_SIE (msr, sie); | |
674 | SET_MSR_OVF (msr); | |
675 | SET_MSR (1, msr); | |
676 | } | |
677 | else | |
678 | { | |
679 | OR_MSR_SIE (msr0, sie); | |
680 | SET_MSR_OVF (msr0); | |
681 | } | |
682 | ||
e930b1f5 DB |
683 | /* Generate the interrupt now if MSR0.MPEM is set on fr550 */ |
684 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550 && GET_MSR_MPEM (msr0)) | |
685 | frv_queue_program_interrupt (current_cpu, FRV_MP_EXCEPTION); | |
686 | else | |
687 | { | |
688 | /* Regardless of the slot, set MSR0.AOVF. */ | |
689 | SET_MSR_AOVF (msr0); | |
690 | } | |
b34f6357 DB |
691 | } |
692 | ||
693 | SET_MSR (0, msr0); | |
694 | } | |
695 | ||
696 | /* Determine the correct FQ register to use for the given exception. | |
697 | Return -1 if a register is not available. */ | |
698 | static int | |
699 | fq_for_exception ( | |
700 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
701 | ) | |
702 | { | |
703 | SI fq; | |
704 | struct frv_fp_exception_info *fp_info = & item->u.fp_info; | |
705 | ||
706 | /* For fp_exception overflow, underflow or inexact, use FQ0 or FQ1. */ | |
707 | if (fp_info->ftt == FTT_IEEE_754_EXCEPTION | |
708 | && (fp_info->fsr_mask & (FSR_OVERFLOW | FSR_UNDERFLOW | FSR_INEXACT))) | |
709 | { | |
710 | fq = GET_FQ (0); | |
711 | if (! GET_FQ_VALID (fq)) | |
712 | return 0; /* FQ0 is available. */ | |
713 | fq = GET_FQ (1); | |
714 | if (! GET_FQ_VALID (fq)) | |
715 | return 1; /* FQ1 is available. */ | |
716 | ||
717 | /* No FQ register is available */ | |
718 | { | |
719 | SIM_DESC sd = CPU_STATE (current_cpu); | |
720 | IADDR pc = CPU_PC_GET (current_cpu); | |
721 | sim_engine_abort (sd, current_cpu, pc, "No FQ register available\n"); | |
722 | } | |
723 | return -1; | |
724 | } | |
725 | /* For other exceptions, use FQ2 if the insn was in slot F0/I0 and FQ3 | |
726 | otherwise. */ | |
727 | if (item->slot == UNIT_FM0 || item->slot == UNIT_I0) | |
728 | return 2; | |
729 | ||
730 | return 3; | |
731 | } | |
732 | ||
733 | /* Set FSR0, FQ0-FQ9, depending on the interrupt. */ | |
734 | static void | |
735 | set_fp_exception_registers ( | |
736 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
737 | ) | |
738 | { | |
739 | int fq_index; | |
740 | SI fq; | |
741 | SI insn; | |
742 | SI fsr0; | |
743 | IADDR pc; | |
744 | struct frv_fp_exception_info *fp_info; | |
e930b1f5 DB |
745 | SIM_DESC sd = CPU_STATE (current_cpu); |
746 | ||
747 | /* No FQ registers on fr550 */ | |
748 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
749 | { | |
750 | /* Update the fsr. */ | |
751 | fp_info = & item->u.fp_info; | |
752 | fsr0 = GET_FSR (0); | |
753 | SET_FSR_FTT (fsr0, fp_info->ftt); | |
754 | SET_FSR (0, fsr0); | |
755 | return; | |
756 | } | |
b34f6357 DB |
757 | |
758 | /* Select an FQ and update it with the exception information. */ | |
759 | fq_index = fq_for_exception (current_cpu, item); | |
760 | if (fq_index == -1) | |
761 | return; | |
762 | ||
763 | fp_info = & item->u.fp_info; | |
764 | fq = GET_FQ (fq_index); | |
765 | SET_FQ_MIV (fq, MIV_FLOAT); | |
766 | SET_FQ_SIE (fq, SIE_NIL); | |
767 | SET_FQ_FTT (fq, fp_info->ftt); | |
768 | SET_FQ_CEXC (fq, fp_info->fsr_mask); | |
769 | SET_FQ_VALID (fq); | |
770 | SET_FQ (fq_index, fq); | |
771 | ||
772 | /* Write the failing insn into FQx.OPC. */ | |
773 | pc = item->vpc; | |
774 | insn = GETMEMSI (current_cpu, pc, pc); | |
775 | SET_FQ_OPC (fq_index, insn); | |
776 | ||
777 | /* Update the fsr. */ | |
778 | fsr0 = GET_FSR (0); | |
779 | SET_FSR_QNE (fsr0); /* FQ not empty */ | |
780 | SET_FSR_FTT (fsr0, fp_info->ftt); | |
781 | SET_FSR (0, fsr0); | |
782 | } | |
783 | ||
784 | /* Record the state of a division exception in the ISR. */ | |
785 | static void | |
786 | set_isr_exception_fields ( | |
787 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
788 | ) | |
789 | { | |
790 | USI isr = GET_ISR (); | |
791 | int dtt = GET_ISR_DTT (isr); | |
792 | dtt |= item->u.dtt; | |
793 | SET_ISR_DTT (isr, dtt); | |
794 | SET_ISR (isr); | |
795 | } | |
796 | ||
797 | /* Set ESFR0, EPCRx, ESRx, EARx and EDRx, according to the given program | |
798 | interrupt. */ | |
799 | static void | |
800 | set_exception_status_registers ( | |
801 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
802 | ) | |
803 | { | |
804 | struct frv_interrupt *interrupt = & frv_interrupt_table[item->kind]; | |
805 | int slot = (item->vpc - previous_vliw_pc) / 4; | |
806 | int reg_index = -1; | |
807 | int set_ear = 0; | |
808 | int set_edr = 0; | |
809 | int set_daec = 0; | |
810 | int set_epcr = 0; | |
811 | SI esr = 0; | |
812 | SIM_DESC sd = CPU_STATE (current_cpu); | |
813 | ||
814 | /* If the interrupt is strict (precise) or the interrupt is on the insns | |
815 | in the I0 pipe, then set the 0 registers. */ | |
816 | if (interrupt->precise) | |
817 | { | |
818 | reg_index = 0; | |
819 | if (interrupt->kind == FRV_REGISTER_EXCEPTION) | |
820 | SET_ESR_REC (esr, item->u.rec); | |
821 | else if (interrupt->kind == FRV_INSTRUCTION_ACCESS_EXCEPTION) | |
822 | SET_ESR_IAEC (esr, item->u.iaec); | |
e930b1f5 DB |
823 | /* For fr550, don't set epcr for precise interrupts. */ |
824 | if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550) | |
825 | set_epcr = 1; | |
b34f6357 DB |
826 | } |
827 | else | |
828 | { | |
829 | switch (interrupt->kind) | |
830 | { | |
831 | case FRV_DIVISION_EXCEPTION: | |
832 | set_isr_exception_fields (current_cpu, item); | |
833 | /* fall thru to set reg_index. */ | |
834 | case FRV_COMMIT_EXCEPTION: | |
e930b1f5 DB |
835 | /* For fr550, always use ESR0. */ |
836 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
837 | reg_index = 0; | |
838 | else if (item->slot == UNIT_I0) | |
b34f6357 DB |
839 | reg_index = 0; |
840 | else if (item->slot == UNIT_I1) | |
841 | reg_index = 1; | |
842 | set_epcr = 1; | |
843 | break; | |
844 | case FRV_DATA_STORE_ERROR: | |
e930b1f5 | 845 | reg_index = 14; /* Use ESR14. */ |
b34f6357 DB |
846 | break; |
847 | case FRV_DATA_ACCESS_ERROR: | |
848 | reg_index = 15; /* Use ESR15, EPCR15. */ | |
c7a48b9a | 849 | set_ear = 1; |
b34f6357 DB |
850 | break; |
851 | case FRV_DATA_ACCESS_EXCEPTION: | |
852 | set_daec = 1; | |
853 | /* fall through */ | |
854 | case FRV_DATA_ACCESS_MMU_MISS: | |
855 | case FRV_MEM_ADDRESS_NOT_ALIGNED: | |
856 | /* Get the appropriate ESR, EPCR, EAR and EDR. | |
857 | EAR will be set. EDR will not be set if this is a store insn. */ | |
858 | set_ear = 1; | |
e930b1f5 DB |
859 | /* For fr550, never use EDRx. */ |
860 | if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550) | |
861 | if (item->u.data_written.length != 0) | |
862 | set_edr = 1; | |
b34f6357 DB |
863 | reg_index = esr_for_data_access_exception (current_cpu, item); |
864 | set_epcr = 1; | |
865 | break; | |
866 | case FRV_MP_EXCEPTION: | |
e930b1f5 DB |
867 | /* For fr550, use EPCR2 and ESR2. */ |
868 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
869 | { | |
870 | reg_index = 2; | |
871 | set_epcr = 1; | |
872 | } | |
b34f6357 DB |
873 | break; /* MSR0-1, FQ0-9 are already set. */ |
874 | case FRV_FP_EXCEPTION: | |
875 | set_fp_exception_registers (current_cpu, item); | |
e930b1f5 DB |
876 | /* For fr550, use EPCR2 and ESR2. */ |
877 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr550) | |
878 | { | |
879 | reg_index = 2; | |
880 | set_epcr = 1; | |
881 | } | |
b34f6357 DB |
882 | break; |
883 | default: | |
884 | { | |
885 | SIM_DESC sd = CPU_STATE (current_cpu); | |
886 | IADDR pc = CPU_PC_GET (current_cpu); | |
887 | sim_engine_abort (sd, current_cpu, pc, | |
888 | "invalid non-strict program interrupt kind: %d\n", | |
889 | interrupt->kind); | |
890 | break; | |
891 | } | |
892 | } | |
893 | } /* non-strict (imprecise) interrupt */ | |
894 | ||
895 | /* Now fill in the selected exception status registers. */ | |
896 | if (reg_index != -1) | |
897 | { | |
898 | /* Now set the exception status registers. */ | |
899 | SET_ESFR_FLAG (reg_index); | |
900 | SET_ESR_EC (esr, interrupt->ec); | |
901 | ||
902 | if (set_epcr) | |
903 | { | |
904 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400) | |
905 | SET_EPCR (reg_index, previous_vliw_pc); | |
906 | else | |
907 | SET_EPCR (reg_index, item->vpc); | |
908 | } | |
909 | ||
910 | if (set_ear) | |
911 | { | |
912 | SET_EAR (reg_index, item->eaddress); | |
913 | SET_ESR_EAV (esr); | |
914 | } | |
915 | else | |
916 | CLEAR_ESR_EAV (esr); | |
917 | ||
918 | if (set_edr) | |
919 | { | |
920 | int edn = set_edr_register (current_cpu, item, 0/* EDR0-3 */); | |
921 | SET_ESR_EDN (esr, edn); | |
922 | SET_ESR_EDV (esr); | |
923 | } | |
924 | else | |
925 | CLEAR_ESR_EDV (esr); | |
926 | ||
927 | if (set_daec) | |
928 | SET_ESR_DAEC (esr, item->u.daec); | |
929 | ||
930 | SET_ESR_VALID (esr); | |
931 | SET_ESR (reg_index, esr); | |
932 | } | |
933 | } | |
934 | ||
935 | /* Check for compound interrupts. | |
936 | Returns NULL if no interrupt is to be processed. */ | |
937 | static struct frv_interrupt * | |
938 | check_for_compound_interrupt ( | |
939 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item | |
940 | ) | |
941 | { | |
942 | struct frv_interrupt *interrupt; | |
943 | ||
944 | /* Set the exception status registers for the original interrupt. */ | |
945 | set_exception_status_registers (current_cpu, item); | |
946 | interrupt = & frv_interrupt_table[item->kind]; | |
947 | ||
948 | if (! interrupt->precise) | |
949 | { | |
950 | IADDR vpc = 0; | |
951 | int mask = 0; | |
952 | ||
953 | vpc = item->vpc; | |
954 | mask = (1 << item->kind); | |
955 | ||
956 | /* Look for more queued program interrupts which are non-deferred | |
957 | (pending inhibit), imprecise (non-strict) different than an interrupt | |
958 | already found and caused by a different insn. A bit mask is used | |
959 | to keep track of interrupts which have already been detected. */ | |
960 | while (item != frv_interrupt_state.queue) | |
961 | { | |
962 | enum frv_interrupt_kind kind; | |
963 | struct frv_interrupt *next_interrupt; | |
964 | --item; | |
965 | kind = item->kind; | |
966 | next_interrupt = & frv_interrupt_table[kind]; | |
967 | ||
968 | if (next_interrupt->iclass != FRV_PROGRAM_INTERRUPT) | |
969 | break; /* no program interrupts left. */ | |
970 | ||
971 | if (item->vpc == vpc) | |
972 | continue; /* caused by the same insn. */ | |
973 | ||
974 | vpc = item->vpc; | |
975 | if (! next_interrupt->precise && ! next_interrupt->deferred) | |
976 | { | |
977 | if (! (mask & (1 << kind))) | |
978 | { | |
979 | /* Set the exception status registers for the additional | |
980 | interrupt. */ | |
981 | set_exception_status_registers (current_cpu, item); | |
982 | mask |= (1 << kind); | |
983 | interrupt = & frv_interrupt_table[FRV_COMPOUND_EXCEPTION]; | |
984 | } | |
985 | } | |
986 | } | |
987 | } | |
988 | ||
989 | /* Return with either the original interrupt, a compound_exception, | |
990 | or no exception. */ | |
991 | return interrupt; | |
992 | } | |
993 | ||
994 | /* Handle a program interrupt. */ | |
995 | void | |
996 | frv_program_interrupt ( | |
997 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item, IADDR pc | |
998 | ) | |
999 | { | |
1000 | struct frv_interrupt *interrupt; | |
1001 | ||
1002 | clear_exception_status_registers (current_cpu); | |
1003 | /* If two or more non-deferred imprecise (non-strict) interrupts occur | |
1004 | on two or more insns, then generate a compound_exception. */ | |
1005 | interrupt = check_for_compound_interrupt (current_cpu, item); | |
1006 | if (interrupt != NULL) | |
1007 | { | |
1008 | frv_program_or_software_interrupt (current_cpu, interrupt, pc); | |
1009 | frv_clear_interrupt_classes (FRV_SOFTWARE_INTERRUPT, | |
1010 | FRV_PROGRAM_INTERRUPT); | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | /* Handle a software interrupt. */ | |
1015 | void | |
1016 | frv_software_interrupt ( | |
1017 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item, IADDR pc | |
1018 | ) | |
1019 | { | |
1020 | struct frv_interrupt *interrupt = & frv_interrupt_table[item->kind]; | |
1021 | frv_program_or_software_interrupt (current_cpu, interrupt, pc); | |
1022 | } | |
1023 | ||
1024 | /* Handle a program interrupt or a software interrupt in non-operating mode. */ | |
1025 | void | |
1026 | frv_non_operating_interrupt ( | |
1027 | SIM_CPU *current_cpu, enum frv_interrupt_kind kind, IADDR pc | |
1028 | ) | |
1029 | { | |
1030 | SIM_DESC sd = CPU_STATE (current_cpu); | |
1031 | switch (kind) | |
1032 | { | |
1033 | case FRV_INTERRUPT_LEVEL_1: | |
1034 | case FRV_INTERRUPT_LEVEL_2: | |
1035 | case FRV_INTERRUPT_LEVEL_3: | |
1036 | case FRV_INTERRUPT_LEVEL_4: | |
1037 | case FRV_INTERRUPT_LEVEL_5: | |
1038 | case FRV_INTERRUPT_LEVEL_6: | |
1039 | case FRV_INTERRUPT_LEVEL_7: | |
1040 | case FRV_INTERRUPT_LEVEL_8: | |
1041 | case FRV_INTERRUPT_LEVEL_9: | |
1042 | case FRV_INTERRUPT_LEVEL_10: | |
1043 | case FRV_INTERRUPT_LEVEL_11: | |
1044 | case FRV_INTERRUPT_LEVEL_12: | |
1045 | case FRV_INTERRUPT_LEVEL_13: | |
1046 | case FRV_INTERRUPT_LEVEL_14: | |
1047 | case FRV_INTERRUPT_LEVEL_15: | |
1048 | sim_engine_abort (sd, current_cpu, pc, | |
1049 | "interrupt: external %d\n", kind + 1); | |
1050 | break; | |
1051 | case FRV_TRAP_INSTRUCTION: | |
1052 | break; /* handle as in operating mode. */ | |
1053 | case FRV_COMMIT_EXCEPTION: | |
1054 | sim_engine_abort (sd, current_cpu, pc, | |
1055 | "interrupt: commit_exception\n"); | |
1056 | break; | |
1057 | case FRV_DIVISION_EXCEPTION: | |
1058 | sim_engine_abort (sd, current_cpu, pc, | |
1059 | "interrupt: division_exception\n"); | |
1060 | break; | |
1061 | case FRV_DATA_STORE_ERROR: | |
1062 | sim_engine_abort (sd, current_cpu, pc, | |
1063 | "interrupt: data_store_error\n"); | |
1064 | break; | |
1065 | case FRV_DATA_ACCESS_EXCEPTION: | |
1066 | sim_engine_abort (sd, current_cpu, pc, | |
1067 | "interrupt: data_access_exception\n"); | |
1068 | break; | |
1069 | case FRV_DATA_ACCESS_MMU_MISS: | |
1070 | sim_engine_abort (sd, current_cpu, pc, | |
1071 | "interrupt: data_access_mmu_miss\n"); | |
1072 | break; | |
1073 | case FRV_DATA_ACCESS_ERROR: | |
1074 | sim_engine_abort (sd, current_cpu, pc, | |
1075 | "interrupt: data_access_error\n"); | |
1076 | break; | |
1077 | case FRV_MP_EXCEPTION: | |
1078 | sim_engine_abort (sd, current_cpu, pc, | |
1079 | "interrupt: mp_exception\n"); | |
1080 | break; | |
1081 | case FRV_FP_EXCEPTION: | |
1082 | sim_engine_abort (sd, current_cpu, pc, | |
1083 | "interrupt: fp_exception\n"); | |
1084 | break; | |
1085 | case FRV_MEM_ADDRESS_NOT_ALIGNED: | |
1086 | sim_engine_abort (sd, current_cpu, pc, | |
1087 | "interrupt: mem_address_not_aligned\n"); | |
1088 | break; | |
1089 | case FRV_REGISTER_EXCEPTION: | |
1090 | sim_engine_abort (sd, current_cpu, pc, | |
1091 | "interrupt: register_exception\n"); | |
1092 | break; | |
1093 | case FRV_MP_DISABLED: | |
1094 | sim_engine_abort (sd, current_cpu, pc, | |
1095 | "interrupt: mp_disabled\n"); | |
1096 | break; | |
1097 | case FRV_FP_DISABLED: | |
1098 | sim_engine_abort (sd, current_cpu, pc, | |
1099 | "interrupt: fp_disabled\n"); | |
1100 | break; | |
1101 | case FRV_PRIVILEGED_INSTRUCTION: | |
1102 | sim_engine_abort (sd, current_cpu, pc, | |
1103 | "interrupt: privileged_instruction\n"); | |
1104 | break; | |
1105 | case FRV_ILLEGAL_INSTRUCTION: | |
1106 | sim_engine_abort (sd, current_cpu, pc, | |
1107 | "interrupt: illegal_instruction\n"); | |
1108 | break; | |
1109 | case FRV_INSTRUCTION_ACCESS_EXCEPTION: | |
1110 | sim_engine_abort (sd, current_cpu, pc, | |
1111 | "interrupt: instruction_access_exception\n"); | |
1112 | break; | |
1113 | case FRV_INSTRUCTION_ACCESS_MMU_MISS: | |
1114 | sim_engine_abort (sd, current_cpu, pc, | |
1115 | "interrupt: instruction_access_mmu_miss\n"); | |
1116 | break; | |
1117 | case FRV_INSTRUCTION_ACCESS_ERROR: | |
1118 | sim_engine_abort (sd, current_cpu, pc, | |
1119 | "interrupt: insn_access_error\n"); | |
1120 | break; | |
1121 | case FRV_COMPOUND_EXCEPTION: | |
1122 | sim_engine_abort (sd, current_cpu, pc, | |
1123 | "interrupt: compound_exception\n"); | |
1124 | break; | |
1125 | case FRV_BREAK_EXCEPTION: | |
1126 | sim_engine_abort (sd, current_cpu, pc, | |
1127 | "interrupt: break_exception\n"); | |
1128 | break; | |
1129 | case FRV_RESET: | |
1130 | sim_engine_abort (sd, current_cpu, pc, | |
1131 | "interrupt: reset\n"); | |
1132 | break; | |
1133 | default: | |
1134 | sim_engine_abort (sd, current_cpu, pc, | |
1135 | "unhandled interrupt kind: %d\n", kind); | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* Handle a break interrupt. */ | |
1141 | void | |
1142 | frv_break_interrupt ( | |
1143 | SIM_CPU *current_cpu, struct frv_interrupt *interrupt, IADDR current_pc | |
1144 | ) | |
1145 | { | |
1146 | IADDR new_pc; | |
1147 | ||
1148 | /* BPCSR=PC | |
1149 | BPSR.BS=PSR.S | |
1150 | BPSR.BET=PSR.ET | |
1151 | PSR.S=1 | |
1152 | PSR.ET=0 | |
1153 | TBR.TT=0xff | |
1154 | PC=TBR | |
1155 | */ | |
1156 | /* Must set PSR.S first to allow access to supervisor-only spr registers. */ | |
1157 | SET_H_BPSR_BS (GET_H_PSR_S ()); | |
1158 | SET_H_BPSR_BET (GET_H_PSR_ET ()); | |
1159 | SET_H_PSR_S (1); | |
1160 | SET_H_PSR_ET (0); | |
1161 | /* Must set PSR.S first to allow access to supervisor-only spr registers. */ | |
1162 | SET_H_SPR (H_SPR_BPCSR, current_pc); | |
1163 | ||
1164 | /* Set the new PC in the TBR. */ | |
1165 | SET_H_TBR_TT (interrupt->handler_offset); | |
1166 | new_pc = GET_H_SPR (H_SPR_TBR); | |
1167 | SET_H_PC (new_pc); | |
1168 | ||
1169 | CPU_DEBUG_STATE (current_cpu) = 1; | |
1170 | } | |
1171 | ||
1172 | /* Handle a program interrupt or a software interrupt. */ | |
1173 | void | |
1174 | frv_program_or_software_interrupt ( | |
1175 | SIM_CPU *current_cpu, struct frv_interrupt *interrupt, IADDR current_pc | |
1176 | ) | |
1177 | { | |
1178 | USI new_pc; | |
1179 | int original_psr_et; | |
1180 | ||
1181 | /* PCSR=PC | |
1182 | PSR.PS=PSR.S | |
1183 | PSR.ET=0 | |
1184 | PSR.S=1 | |
1185 | if PSR.ESR==1 | |
1186 | SR0 through SR3=GR4 through GR7 | |
1187 | TBR.TT=interrupt handler offset | |
1188 | PC=TBR | |
1189 | */ | |
1190 | original_psr_et = GET_H_PSR_ET (); | |
1191 | ||
1192 | SET_H_PSR_PS (GET_H_PSR_S ()); | |
1193 | SET_H_PSR_ET (0); | |
1194 | SET_H_PSR_S (1); | |
1195 | ||
1196 | /* Must set PSR.S first to allow access to supervisor-only spr registers. */ | |
1197 | /* The PCSR depends on the precision of the interrupt. */ | |
1198 | if (interrupt->precise) | |
1199 | SET_H_SPR (H_SPR_PCSR, previous_vliw_pc); | |
1200 | else | |
1201 | SET_H_SPR (H_SPR_PCSR, current_pc); | |
1202 | ||
1203 | /* Set the new PC in the TBR. */ | |
1204 | SET_H_TBR_TT (interrupt->handler_offset); | |
1205 | new_pc = GET_H_SPR (H_SPR_TBR); | |
1206 | SET_H_PC (new_pc); | |
1207 | ||
1208 | /* If PSR.ET was not originally set, then enter the stopped state. */ | |
1209 | if (! original_psr_et) | |
1210 | { | |
1211 | SIM_DESC sd = CPU_STATE (current_cpu); | |
1212 | frv_non_operating_interrupt (current_cpu, interrupt->kind, current_pc); | |
1213 | sim_engine_halt (sd, current_cpu, NULL, new_pc, sim_stopped, SIM_SIGINT); | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /* Handle a program interrupt or a software interrupt. */ | |
1218 | void | |
1219 | frv_external_interrupt ( | |
1220 | SIM_CPU *current_cpu, struct frv_interrupt_queue_element *item, IADDR pc | |
1221 | ) | |
1222 | { | |
1223 | USI new_pc; | |
1224 | struct frv_interrupt *interrupt = & frv_interrupt_table[item->kind]; | |
1225 | ||
1226 | /* Don't process the interrupt if PSR.ET is not set or if it is masked. | |
1227 | Interrupt 15 is processed even if it appears to be masked. */ | |
1228 | if (! GET_H_PSR_ET () | |
1229 | || (interrupt->kind != FRV_INTERRUPT_LEVEL_15 | |
1230 | && interrupt->kind < GET_H_PSR_PIL ())) | |
1231 | return; /* Leave it for later. */ | |
1232 | ||
1233 | /* Remove the interrupt from the queue. */ | |
1234 | --frv_interrupt_state.queue_index; | |
1235 | ||
1236 | /* PCSR=PC | |
1237 | PSR.PS=PSR.S | |
1238 | PSR.ET=0 | |
1239 | PSR.S=1 | |
1240 | if PSR.ESR==1 | |
1241 | SR0 through SR3=GR4 through GR7 | |
1242 | TBR.TT=interrupt handler offset | |
1243 | PC=TBR | |
1244 | */ | |
1245 | SET_H_PSR_PS (GET_H_PSR_S ()); | |
1246 | SET_H_PSR_ET (0); | |
1247 | SET_H_PSR_S (1); | |
1248 | /* Must set PSR.S first to allow access to supervisor-only spr registers. */ | |
1249 | SET_H_SPR (H_SPR_PCSR, GET_H_PC ()); | |
1250 | ||
1251 | /* Set the new PC in the TBR. */ | |
1252 | SET_H_TBR_TT (interrupt->handler_offset); | |
1253 | new_pc = GET_H_SPR (H_SPR_TBR); | |
1254 | SET_H_PC (new_pc); | |
1255 | } | |
1256 | ||
1257 | /* Clear interrupts which fall within the range of classes given. */ | |
1258 | void | |
1259 | frv_clear_interrupt_classes ( | |
1260 | enum frv_interrupt_class low_class, enum frv_interrupt_class high_class | |
1261 | ) | |
1262 | { | |
1263 | int i; | |
1264 | int j; | |
1265 | int limit = frv_interrupt_state.queue_index; | |
1266 | ||
1267 | /* Find the lowest priority interrupt to be removed. */ | |
1268 | for (i = 0; i < limit; ++i) | |
1269 | { | |
1270 | enum frv_interrupt_kind kind = frv_interrupt_state.queue[i].kind; | |
1271 | struct frv_interrupt* interrupt = & frv_interrupt_table[kind]; | |
1272 | if (interrupt->iclass >= low_class) | |
1273 | break; | |
1274 | } | |
1275 | ||
1276 | /* Find the highest priority interrupt to be removed. */ | |
1277 | for (j = limit - 1; j >= i; --j) | |
1278 | { | |
1279 | enum frv_interrupt_kind kind = frv_interrupt_state.queue[j].kind; | |
1280 | struct frv_interrupt* interrupt = & frv_interrupt_table[kind]; | |
1281 | if (interrupt->iclass <= high_class) | |
1282 | break; | |
1283 | } | |
1284 | ||
1285 | /* Shuffle the remaining high priority interrupts down into the empty space | |
1286 | left by the deleted interrupts. */ | |
1287 | if (j >= i) | |
1288 | { | |
1289 | for (++j; j < limit; ++j) | |
1290 | frv_interrupt_state.queue[i++] = frv_interrupt_state.queue[j]; | |
1291 | frv_interrupt_state.queue_index -= (j - i); | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | /* Save data written to memory into the interrupt state so that it can be | |
1296 | copied to the appropriate EDR register, if necessary, in the event of an | |
1297 | interrupt. */ | |
1298 | void | |
1299 | frv_save_data_written_for_interrupts ( | |
1300 | SIM_CPU *current_cpu, CGEN_WRITE_QUEUE_ELEMENT *item | |
1301 | ) | |
1302 | { | |
1303 | /* Record the slot containing the insn doing the write in the | |
1304 | interrupt state. */ | |
1305 | frv_interrupt_state.slot = CGEN_WRITE_QUEUE_ELEMENT_PIPE (item); | |
1306 | ||
1307 | /* Now record any data written to memory in the interrupt state. */ | |
1308 | switch (CGEN_WRITE_QUEUE_ELEMENT_KIND (item)) | |
1309 | { | |
1310 | case CGEN_BI_WRITE: | |
1311 | case CGEN_QI_WRITE: | |
1312 | case CGEN_SI_WRITE: | |
1313 | case CGEN_SF_WRITE: | |
1314 | case CGEN_PC_WRITE: | |
1315 | case CGEN_FN_HI_WRITE: | |
1316 | case CGEN_FN_SI_WRITE: | |
1317 | case CGEN_FN_SF_WRITE: | |
1318 | case CGEN_FN_DI_WRITE: | |
1319 | case CGEN_FN_DF_WRITE: | |
1320 | case CGEN_FN_XI_WRITE: | |
1321 | case CGEN_FN_PC_WRITE: | |
1322 | break; /* Ignore writes to registers. */ | |
1323 | case CGEN_MEM_QI_WRITE: | |
1324 | frv_interrupt_state.data_written.length = 1; | |
1325 | frv_interrupt_state.data_written.words[0] | |
1326 | = item->kinds.mem_qi_write.value; | |
1327 | break; | |
1328 | case CGEN_MEM_HI_WRITE: | |
1329 | frv_interrupt_state.data_written.length = 1; | |
1330 | frv_interrupt_state.data_written.words[0] | |
1331 | = item->kinds.mem_hi_write.value; | |
1332 | break; | |
1333 | case CGEN_MEM_SI_WRITE: | |
1334 | frv_interrupt_state.data_written.length = 1; | |
1335 | frv_interrupt_state.data_written.words[0] | |
1336 | = item->kinds.mem_si_write.value; | |
1337 | break; | |
1338 | case CGEN_MEM_DI_WRITE: | |
1339 | frv_interrupt_state.data_written.length = 2; | |
1340 | frv_interrupt_state.data_written.words[0] | |
1341 | = item->kinds.mem_di_write.value >> 32; | |
1342 | frv_interrupt_state.data_written.words[1] | |
1343 | = item->kinds.mem_di_write.value; | |
1344 | break; | |
1345 | case CGEN_MEM_DF_WRITE: | |
1346 | frv_interrupt_state.data_written.length = 2; | |
1347 | frv_interrupt_state.data_written.words[0] | |
1348 | = item->kinds.mem_df_write.value >> 32; | |
1349 | frv_interrupt_state.data_written.words[1] | |
1350 | = item->kinds.mem_df_write.value; | |
1351 | break; | |
1352 | case CGEN_MEM_XI_WRITE: | |
1353 | frv_interrupt_state.data_written.length = 4; | |
1354 | frv_interrupt_state.data_written.words[0] | |
1355 | = item->kinds.mem_xi_write.value[0]; | |
1356 | frv_interrupt_state.data_written.words[1] | |
1357 | = item->kinds.mem_xi_write.value[1]; | |
1358 | frv_interrupt_state.data_written.words[2] | |
1359 | = item->kinds.mem_xi_write.value[2]; | |
1360 | frv_interrupt_state.data_written.words[3] | |
1361 | = item->kinds.mem_xi_write.value[3]; | |
1362 | break; | |
1363 | case CGEN_FN_MEM_QI_WRITE: | |
1364 | frv_interrupt_state.data_written.length = 1; | |
1365 | frv_interrupt_state.data_written.words[0] | |
1366 | = item->kinds.fn_mem_qi_write.value; | |
1367 | break; | |
1368 | case CGEN_FN_MEM_HI_WRITE: | |
1369 | frv_interrupt_state.data_written.length = 1; | |
1370 | frv_interrupt_state.data_written.words[0] | |
1371 | = item->kinds.fn_mem_hi_write.value; | |
1372 | break; | |
1373 | case CGEN_FN_MEM_SI_WRITE: | |
1374 | frv_interrupt_state.data_written.length = 1; | |
1375 | frv_interrupt_state.data_written.words[0] | |
1376 | = item->kinds.fn_mem_si_write.value; | |
1377 | break; | |
1378 | case CGEN_FN_MEM_DI_WRITE: | |
1379 | frv_interrupt_state.data_written.length = 2; | |
1380 | frv_interrupt_state.data_written.words[0] | |
1381 | = item->kinds.fn_mem_di_write.value >> 32; | |
1382 | frv_interrupt_state.data_written.words[1] | |
1383 | = item->kinds.fn_mem_di_write.value; | |
1384 | break; | |
1385 | case CGEN_FN_MEM_DF_WRITE: | |
1386 | frv_interrupt_state.data_written.length = 2; | |
1387 | frv_interrupt_state.data_written.words[0] | |
1388 | = item->kinds.fn_mem_df_write.value >> 32; | |
1389 | frv_interrupt_state.data_written.words[1] | |
1390 | = item->kinds.fn_mem_df_write.value; | |
1391 | break; | |
1392 | case CGEN_FN_MEM_XI_WRITE: | |
1393 | frv_interrupt_state.data_written.length = 4; | |
1394 | frv_interrupt_state.data_written.words[0] | |
1395 | = item->kinds.fn_mem_xi_write.value[0]; | |
1396 | frv_interrupt_state.data_written.words[1] | |
1397 | = item->kinds.fn_mem_xi_write.value[1]; | |
1398 | frv_interrupt_state.data_written.words[2] | |
1399 | = item->kinds.fn_mem_xi_write.value[2]; | |
1400 | frv_interrupt_state.data_written.words[3] | |
1401 | = item->kinds.fn_mem_xi_write.value[3]; | |
1402 | break; | |
1403 | default: | |
1404 | { | |
1405 | SIM_DESC sd = CPU_STATE (current_cpu); | |
1406 | IADDR pc = CPU_PC_GET (current_cpu); | |
1407 | sim_engine_abort (sd, current_cpu, pc, | |
1408 | "unknown write kind during save for interrupt\n"); | |
1409 | } | |
1410 | break; | |
1411 | } | |
1412 | } |