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main: switch qemu_set_fd_handler to g_io_add_watch
[qemu.git] / target-microblaze / translate.c
blob366fd3e607859ef3740fc097e434345db34c2586
1 /*
2 * Xilinx MicroBlaze emulation for qemu: main translation routines.
3 *
4 * Copyright (c) 2009 Edgar E. Iglesias.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include <stdarg.h>
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <inttypes.h>
25 #include <assert.h>
26
27 #include "cpu.h"
28 #include "disas.h"
29 #include "tcg-op.h"
30 #include "helper.h"
31 #include "microblaze-decode.h"
32 #include "qemu-common.h"
33
34 #define GEN_HELPER 1
35 #include "helper.h"
36
37 #define SIM_COMPAT 0
38 #define DISAS_GNU 1
39 #define DISAS_MB 1
40 #if DISAS_MB && !SIM_COMPAT
41 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
42 #else
43 # define LOG_DIS(...) do { } while (0)
44 #endif
45
46 #define D(x)
47
48 #define EXTRACT_FIELD(src, start, end) \
49 (((src) >> start) & ((1 << (end - start + 1)) - 1))
50
51 static TCGv env_debug;
52 static TCGv_ptr cpu_env;
53 static TCGv cpu_R[32];
54 static TCGv cpu_SR[18];
55 static TCGv env_imm;
56 static TCGv env_btaken;
57 static TCGv env_btarget;
58 static TCGv env_iflags;
59
60 #include "gen-icount.h"
61
62 /* This is the state at translation time. */
63 typedef struct DisasContext {
64 CPUState *env;
65 target_ulong pc;
66
67 /* Decoder. */
68 int type_b;
69 uint32_t ir;
70 uint8_t opcode;
71 uint8_t rd, ra, rb;
72 uint16_t imm;
73
74 unsigned int cpustate_changed;
75 unsigned int delayed_branch;
76 unsigned int tb_flags, synced_flags; /* tb dependent flags. */
77 unsigned int clear_imm;
78 int is_jmp;
79
80 #define JMP_NOJMP 0
81 #define JMP_DIRECT 1
82 #define JMP_DIRECT_CC 2
83 #define JMP_INDIRECT 3
84 unsigned int jmp;
85 uint32_t jmp_pc;
86
87 int abort_at_next_insn;
88 int nr_nops;
89 struct TranslationBlock *tb;
90 int singlestep_enabled;
91 } DisasContext;
92
93 static const char *regnames[] =
94 {
95 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
96 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
97 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
98 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
99 };
100
101 static const char *special_regnames[] =
102 {
103 "rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7",
104 "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
105 "sr16", "sr17", "sr18"
106 };
107
108 /* Sign extend at translation time. */
109 static inline int sign_extend(unsigned int val, unsigned int width)
110 {
111 int sval;
112
113 /* LSL. */
114 val <<= 31 - width;
115 sval = val;
116 /* ASR. */
117 sval >>= 31 - width;
118 return sval;
119 }
120
121 static inline void t_sync_flags(DisasContext *dc)
122 {
123 /* Synch the tb dependant flags between translator and runtime. */
124 if (dc->tb_flags != dc->synced_flags) {
125 tcg_gen_movi_tl(env_iflags, dc->tb_flags);
126 dc->synced_flags = dc->tb_flags;
127 }
128 }
129
130 static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
131 {
132 TCGv_i32 tmp = tcg_const_i32(index);
133
134 t_sync_flags(dc);
135 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
136 gen_helper_raise_exception(tmp);
137 tcg_temp_free_i32(tmp);
138 dc->is_jmp = DISAS_UPDATE;
139 }
140
141 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
142 {
143 TranslationBlock *tb;
144 tb = dc->tb;
145 if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
146 tcg_gen_goto_tb(n);
147 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
148 tcg_gen_exit_tb((tcg_target_long)tb + n);
149 } else {
150 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
151 tcg_gen_exit_tb(0);
152 }
153 }
154
155 static void read_carry(DisasContext *dc, TCGv d)
156 {
157 tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
158 }
159
160 static void write_carry(DisasContext *dc, TCGv v)
161 {
162 TCGv t0 = tcg_temp_new();
163 tcg_gen_shli_tl(t0, v, 31);
164 tcg_gen_sari_tl(t0, t0, 31);
165 tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC));
166 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
167 ~(MSR_C | MSR_CC));
168 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
169 tcg_temp_free(t0);
170 }
171
172 /* True if ALU operand b is a small immediate that may deserve
173 faster treatment. */
174 static inline int dec_alu_op_b_is_small_imm(DisasContext *dc)
175 {
176 /* Immediate insn without the imm prefix ? */
177 return dc->type_b && !(dc->tb_flags & IMM_FLAG);
178 }
179
180 static inline TCGv *dec_alu_op_b(DisasContext *dc)
181 {
182 if (dc->type_b) {
183 if (dc->tb_flags & IMM_FLAG)
184 tcg_gen_ori_tl(env_imm, env_imm, dc->imm);
185 else
186 tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm));
187 return &env_imm;
188 } else
189 return &cpu_R[dc->rb];
190 }
191
192 static void dec_add(DisasContext *dc)
193 {
194 unsigned int k, c;
195 TCGv cf;
196
197 k = dc->opcode & 4;
198 c = dc->opcode & 2;
199
200 LOG_DIS("add%s%s%s r%d r%d r%d\n",
201 dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "",
202 dc->rd, dc->ra, dc->rb);
203
204 /* Take care of the easy cases first. */
205 if (k) {
206 /* k - keep carry, no need to update MSR. */
207 /* If rd == r0, it's a nop. */
208 if (dc->rd) {
209 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
210
211 if (c) {
212 /* c - Add carry into the result. */
213 cf = tcg_temp_new();
214
215 read_carry(dc, cf);
216 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
217 tcg_temp_free(cf);
218 }
219 }
220 return;
221 }
222
223 /* From now on, we can assume k is zero. So we need to update MSR. */
224 /* Extract carry. */
225 cf = tcg_temp_new();
226 if (c) {
227 read_carry(dc, cf);
228 } else {
229 tcg_gen_movi_tl(cf, 0);
230 }
231
232 if (dc->rd) {
233 TCGv ncf = tcg_temp_new();
234 gen_helper_carry(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
235 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
236 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
237 write_carry(dc, ncf);
238 tcg_temp_free(ncf);
239 } else {
240 gen_helper_carry(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
241 write_carry(dc, cf);
242 }
243 tcg_temp_free(cf);
244 }
245
246 static void dec_sub(DisasContext *dc)
247 {
248 unsigned int u, cmp, k, c;
249 TCGv cf, na;
250
251 u = dc->imm & 2;
252 k = dc->opcode & 4;
253 c = dc->opcode & 2;
254 cmp = (dc->imm & 1) && (!dc->type_b) && k;
255
256 if (cmp) {
257 LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir);
258 if (dc->rd) {
259 if (u)
260 gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
261 else
262 gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
263 }
264 return;
265 }
266
267 LOG_DIS("sub%s%s r%d, r%d r%d\n",
268 k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb);
269
270 /* Take care of the easy cases first. */
271 if (k) {
272 /* k - keep carry, no need to update MSR. */
273 /* If rd == r0, it's a nop. */
274 if (dc->rd) {
275 tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
276
277 if (c) {
278 /* c - Add carry into the result. */
279 cf = tcg_temp_new();
280
281 read_carry(dc, cf);
282 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
283 tcg_temp_free(cf);
284 }
285 }
286 return;
287 }
288
289 /* From now on, we can assume k is zero. So we need to update MSR. */
290 /* Extract carry. And complement a into na. */
291 cf = tcg_temp_new();
292 na = tcg_temp_new();
293 if (c) {
294 read_carry(dc, cf);
295 } else {
296 tcg_gen_movi_tl(cf, 1);
297 }
298
299 /* d = b + ~a + c. carry defaults to 1. */
300 tcg_gen_not_tl(na, cpu_R[dc->ra]);
301
302 if (dc->rd) {
303 TCGv ncf = tcg_temp_new();
304 gen_helper_carry(ncf, na, *(dec_alu_op_b(dc)), cf);
305 tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc)));
306 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
307 write_carry(dc, ncf);
308 tcg_temp_free(ncf);
309 } else {
310 gen_helper_carry(cf, na, *(dec_alu_op_b(dc)), cf);
311 write_carry(dc, cf);
312 }
313 tcg_temp_free(cf);
314 tcg_temp_free(na);
315 }
316
317 static void dec_pattern(DisasContext *dc)
318 {
319 unsigned int mode;
320 int l1;
321
322 if ((dc->tb_flags & MSR_EE_FLAG)
323 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
324 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
325 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
326 t_gen_raise_exception(dc, EXCP_HW_EXCP);
327 }
328
329 mode = dc->opcode & 3;
330 switch (mode) {
331 case 0:
332 /* pcmpbf. */
333 LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
334 if (dc->rd)
335 gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
336 break;
337 case 2:
338 LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
339 if (dc->rd) {
340 TCGv t0 = tcg_temp_local_new();
341 l1 = gen_new_label();
342 tcg_gen_movi_tl(t0, 1);
343 tcg_gen_brcond_tl(TCG_COND_EQ,
344 cpu_R[dc->ra], cpu_R[dc->rb], l1);
345 tcg_gen_movi_tl(t0, 0);
346 gen_set_label(l1);
347 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
348 tcg_temp_free(t0);
349 }
350 break;
351 case 3:
352 LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
353 l1 = gen_new_label();
354 if (dc->rd) {
355 TCGv t0 = tcg_temp_local_new();
356 tcg_gen_movi_tl(t0, 1);
357 tcg_gen_brcond_tl(TCG_COND_NE,
358 cpu_R[dc->ra], cpu_R[dc->rb], l1);
359 tcg_gen_movi_tl(t0, 0);
360 gen_set_label(l1);
361 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
362 tcg_temp_free(t0);
363 }
364 break;
365 default:
366 cpu_abort(dc->env,
367 "unsupported pattern insn opcode=%x\n", dc->opcode);
368 break;
369 }
370 }
371
372 static void dec_and(DisasContext *dc)
373 {
374 unsigned int not;
375
376 if (!dc->type_b && (dc->imm & (1 << 10))) {
377 dec_pattern(dc);
378 return;
379 }
380
381 not = dc->opcode & (1 << 1);
382 LOG_DIS("and%s\n", not ? "n" : "");
383
384 if (!dc->rd)
385 return;
386
387 if (not) {
388 TCGv t = tcg_temp_new();
389 tcg_gen_not_tl(t, *(dec_alu_op_b(dc)));
390 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t);
391 tcg_temp_free(t);
392 } else
393 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
394 }
395
396 static void dec_or(DisasContext *dc)
397 {
398 if (!dc->type_b && (dc->imm & (1 << 10))) {
399 dec_pattern(dc);
400 return;
401 }
402
403 LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
404 if (dc->rd)
405 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
406 }
407
408 static void dec_xor(DisasContext *dc)
409 {
410 if (!dc->type_b && (dc->imm & (1 << 10))) {
411 dec_pattern(dc);
412 return;
413 }
414
415 LOG_DIS("xor r%d\n", dc->rd);
416 if (dc->rd)
417 tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
418 }
419
420 static inline void msr_read(DisasContext *dc, TCGv d)
421 {
422 tcg_gen_mov_tl(d, cpu_SR[SR_MSR]);
423 }
424
425 static inline void msr_write(DisasContext *dc, TCGv v)
426 {
427 TCGv t;
428
429 t = tcg_temp_new();
430 dc->cpustate_changed = 1;
431 /* PVR bit is not writable. */
432 tcg_gen_andi_tl(t, v, ~MSR_PVR);
433 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
434 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v);
435 tcg_temp_free(t);
436 }
437
438 static void dec_msr(DisasContext *dc)
439 {
440 TCGv t0, t1;
441 unsigned int sr, to, rn;
442 int mem_index = cpu_mmu_index(dc->env);
443
444 sr = dc->imm & ((1 << 14) - 1);
445 to = dc->imm & (1 << 14);
446 dc->type_b = 1;
447 if (to)
448 dc->cpustate_changed = 1;
449
450 /* msrclr and msrset. */
451 if (!(dc->imm & (1 << 15))) {
452 unsigned int clr = dc->ir & (1 << 16);
453
454 LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set",
455 dc->rd, dc->imm);
456
457 if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) {
458 /* nop??? */
459 return;
460 }
461
462 if ((dc->tb_flags & MSR_EE_FLAG)
463 && mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) {
464 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
465 t_gen_raise_exception(dc, EXCP_HW_EXCP);
466 return;
467 }
468
469 if (dc->rd)
470 msr_read(dc, cpu_R[dc->rd]);
471
472 t0 = tcg_temp_new();
473 t1 = tcg_temp_new();
474 msr_read(dc, t0);
475 tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc)));
476
477 if (clr) {
478 tcg_gen_not_tl(t1, t1);
479 tcg_gen_and_tl(t0, t0, t1);
480 } else
481 tcg_gen_or_tl(t0, t0, t1);
482 msr_write(dc, t0);
483 tcg_temp_free(t0);
484 tcg_temp_free(t1);
485 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
486 dc->is_jmp = DISAS_UPDATE;
487 return;
488 }
489
490 if (to) {
491 if ((dc->tb_flags & MSR_EE_FLAG)
492 && mem_index == MMU_USER_IDX) {
493 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
494 t_gen_raise_exception(dc, EXCP_HW_EXCP);
495 return;
496 }
497 }
498
499 #if !defined(CONFIG_USER_ONLY)
500 /* Catch read/writes to the mmu block. */
501 if ((sr & ~0xff) == 0x1000) {
502 sr &= 7;
503 LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
504 if (to)
505 gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]);
506 else
507 gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr));
508 return;
509 }
510 #endif
511
512 if (to) {
513 LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
514 switch (sr) {
515 case 0:
516 break;
517 case 1:
518 msr_write(dc, cpu_R[dc->ra]);
519 break;
520 case 0x3:
521 tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]);
522 break;
523 case 0x5:
524 tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]);
525 break;
526 case 0x7:
527 tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
528 break;
529 default:
530 cpu_abort(dc->env, "unknown mts reg %x\n", sr);
531 break;
532 }
533 } else {
534 LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm);
535
536 switch (sr) {
537 case 0:
538 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
539 break;
540 case 1:
541 msr_read(dc, cpu_R[dc->rd]);
542 break;
543 case 0x3:
544 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]);
545 break;
546 case 0x5:
547 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]);
548 break;
549 case 0x7:
550 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]);
551 break;
552 case 0xb:
553 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]);
554 break;
555 case 0x2000:
556 case 0x2001:
557 case 0x2002:
558 case 0x2003:
559 case 0x2004:
560 case 0x2005:
561 case 0x2006:
562 case 0x2007:
563 case 0x2008:
564 case 0x2009:
565 case 0x200a:
566 case 0x200b:
567 case 0x200c:
568 rn = sr & 0xf;
569 tcg_gen_ld_tl(cpu_R[dc->rd],
570 cpu_env, offsetof(CPUState, pvr.regs[rn]));
571 break;
572 default:
573 cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
574 break;
575 }
576 }
577
578 if (dc->rd == 0) {
579 tcg_gen_movi_tl(cpu_R[0], 0);
580 }
581 }
582
583 /* 64-bit signed mul, lower result in d and upper in d2. */
584 static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
585 {
586 TCGv_i64 t0, t1;
587
588 t0 = tcg_temp_new_i64();
589 t1 = tcg_temp_new_i64();
590
591 tcg_gen_ext_i32_i64(t0, a);
592 tcg_gen_ext_i32_i64(t1, b);
593 tcg_gen_mul_i64(t0, t0, t1);
594
595 tcg_gen_trunc_i64_i32(d, t0);
596 tcg_gen_shri_i64(t0, t0, 32);
597 tcg_gen_trunc_i64_i32(d2, t0);
598
599 tcg_temp_free_i64(t0);
600 tcg_temp_free_i64(t1);
601 }
602
603 /* 64-bit unsigned muls, lower result in d and upper in d2. */
604 static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
605 {
606 TCGv_i64 t0, t1;
607
608 t0 = tcg_temp_new_i64();
609 t1 = tcg_temp_new_i64();
610
611 tcg_gen_extu_i32_i64(t0, a);
612 tcg_gen_extu_i32_i64(t1, b);
613 tcg_gen_mul_i64(t0, t0, t1);
614
615 tcg_gen_trunc_i64_i32(d, t0);
616 tcg_gen_shri_i64(t0, t0, 32);
617 tcg_gen_trunc_i64_i32(d2, t0);
618
619 tcg_temp_free_i64(t0);
620 tcg_temp_free_i64(t1);
621 }
622
623 /* Multiplier unit. */
624 static void dec_mul(DisasContext *dc)
625 {
626 TCGv d[2];
627 unsigned int subcode;
628
629 if ((dc->tb_flags & MSR_EE_FLAG)
630 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
631 && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
632 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
633 t_gen_raise_exception(dc, EXCP_HW_EXCP);
634 return;
635 }
636
637 subcode = dc->imm & 3;
638 d[0] = tcg_temp_new();
639 d[1] = tcg_temp_new();
640
641 if (dc->type_b) {
642 LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
643 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
644 goto done;
645 }
646
647 /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
648 if (subcode >= 1 && subcode <= 3
649 && !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
650 /* nop??? */
651 }
652
653 switch (subcode) {
654 case 0:
655 LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
656 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
657 break;
658 case 1:
659 LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
660 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
661 break;
662 case 2:
663 LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
664 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
665 break;
666 case 3:
667 LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
668 t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
669 break;
670 default:
671 cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
672 break;
673 }
674 done:
675 tcg_temp_free(d[0]);
676 tcg_temp_free(d[1]);
677 }
678
679 /* Div unit. */
680 static void dec_div(DisasContext *dc)
681 {
682 unsigned int u;
683
684 u = dc->imm & 2;
685 LOG_DIS("div\n");
686
687 if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
688 && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
689 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
690 t_gen_raise_exception(dc, EXCP_HW_EXCP);
691 }
692
693 if (u)
694 gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
695 else
696 gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
697 if (!dc->rd)
698 tcg_gen_movi_tl(cpu_R[dc->rd], 0);
699 }
700
701 static void dec_barrel(DisasContext *dc)
702 {
703 TCGv t0;
704 unsigned int s, t;
705
706 if ((dc->tb_flags & MSR_EE_FLAG)
707 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
708 && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
709 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
710 t_gen_raise_exception(dc, EXCP_HW_EXCP);
711 return;
712 }
713
714 s = dc->imm & (1 << 10);
715 t = dc->imm & (1 << 9);
716
717 LOG_DIS("bs%s%s r%d r%d r%d\n",
718 s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
719
720 t0 = tcg_temp_new();
721
722 tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
723 tcg_gen_andi_tl(t0, t0, 31);
724
725 if (s)
726 tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
727 else {
728 if (t)
729 tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
730 else
731 tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
732 }
733 }
734
735 static void dec_bit(DisasContext *dc)
736 {
737 TCGv t0, t1;
738 unsigned int op;
739 int mem_index = cpu_mmu_index(dc->env);
740
741 op = dc->ir & ((1 << 8) - 1);
742 switch (op) {
743 case 0x21:
744 /* src. */
745 t0 = tcg_temp_new();
746
747 LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
748 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
749 if (dc->rd) {
750 t1 = tcg_temp_new();
751 read_carry(dc, t1);
752 tcg_gen_shli_tl(t1, t1, 31);
753
754 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
755 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
756 tcg_temp_free(t1);
757 }
758
759 /* Update carry. */
760 write_carry(dc, t0);
761 tcg_temp_free(t0);
762 break;
763
764 case 0x1:
765 case 0x41:
766 /* srl. */
767 t0 = tcg_temp_new();
768 LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
769
770 /* Update carry. */
771 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
772 write_carry(dc, t0);
773 tcg_temp_free(t0);
774 if (dc->rd) {
775 if (op == 0x41)
776 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
777 else
778 tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
779 }
780 break;
781 case 0x60:
782 LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
783 tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
784 break;
785 case 0x61:
786 LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
787 tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
788 break;
789 case 0x64:
790 case 0x66:
791 case 0x74:
792 case 0x76:
793 /* wdc. */
794 LOG_DIS("wdc r%d\n", dc->ra);
795 if ((dc->tb_flags & MSR_EE_FLAG)
796 && mem_index == MMU_USER_IDX) {
797 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
798 t_gen_raise_exception(dc, EXCP_HW_EXCP);
799 return;
800 }
801 break;
802 case 0x68:
803 /* wic. */
804 LOG_DIS("wic r%d\n", dc->ra);
805 if ((dc->tb_flags & MSR_EE_FLAG)
806 && mem_index == MMU_USER_IDX) {
807 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
808 t_gen_raise_exception(dc, EXCP_HW_EXCP);
809 return;
810 }
811 break;
812 default:
813 cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
814 dc->pc, op, dc->rd, dc->ra, dc->rb);
815 break;
816 }
817 }
818
819 static inline void sync_jmpstate(DisasContext *dc)
820 {
821 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
822 if (dc->jmp == JMP_DIRECT) {
823 tcg_gen_movi_tl(env_btaken, 1);
824 }
825 dc->jmp = JMP_INDIRECT;
826 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
827 }
828 }
829
830 static void dec_imm(DisasContext *dc)
831 {
832 LOG_DIS("imm %x\n", dc->imm << 16);
833 tcg_gen_movi_tl(env_imm, (dc->imm << 16));
834 dc->tb_flags |= IMM_FLAG;
835 dc->clear_imm = 0;
836 }
837
838 static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
839 unsigned int size)
840 {
841 int mem_index = cpu_mmu_index(dc->env);
842
843 if (size == 1) {
844 tcg_gen_qemu_ld8u(dst, addr, mem_index);
845 } else if (size == 2) {
846 tcg_gen_qemu_ld16u(dst, addr, mem_index);
847 } else if (size == 4) {
848 tcg_gen_qemu_ld32u(dst, addr, mem_index);
849 } else
850 cpu_abort(dc->env, "Incorrect load size %d\n", size);
851 }
852
853 static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
854 {
855 unsigned int extimm = dc->tb_flags & IMM_FLAG;
856
857 /* Treat the common cases first. */
858 if (!dc->type_b) {
859 /* If any of the regs is r0, return a ptr to the other. */
860 if (dc->ra == 0) {
861 return &cpu_R[dc->rb];
862 } else if (dc->rb == 0) {
863 return &cpu_R[dc->ra];
864 }
865
866 *t = tcg_temp_new();
867 tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
868 return t;
869 }
870 /* Immediate. */
871 if (!extimm) {
872 if (dc->imm == 0) {
873 return &cpu_R[dc->ra];
874 }
875 *t = tcg_temp_new();
876 tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
877 tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
878 } else {
879 *t = tcg_temp_new();
880 tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
881 }
882
883 return t;
884 }
885
886 static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size)
887 {
888 if (size == 4) {
889 tcg_gen_bswap32_tl(dst, src);
890 } else if (size == 2) {
891 TCGv t = tcg_temp_new();
892
893 /* bswap16 assumes the high bits are zero. */
894 tcg_gen_andi_tl(t, src, 0xffff);
895 tcg_gen_bswap16_tl(dst, t);
896 tcg_temp_free(t);
897 } else {
898 /* Ignore.
899 cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
900 */
901 }
902 }
903
904 static void dec_load(DisasContext *dc)
905 {
906 TCGv t, *addr;
907 unsigned int size, rev = 0;
908
909 size = 1 << (dc->opcode & 3);
910
911 if (!dc->type_b) {
912 rev = (dc->ir >> 9) & 1;
913 }
914
915 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
916 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
917 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
918 t_gen_raise_exception(dc, EXCP_HW_EXCP);
919 return;
920 }
921
922 LOG_DIS("l%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "");
923
924 t_sync_flags(dc);
925 addr = compute_ldst_addr(dc, &t);
926
927 /*
928 * When doing reverse accesses we need to do two things.
929 *
930 * 1. Reverse the address wrt endianness.
931 * 2. Byteswap the data lanes on the way back into the CPU core.
932 */
933 if (rev && size != 4) {
934 /* Endian reverse the address. t is addr. */
935 switch (size) {
936 case 1:
937 {
938 /* 00 -> 11
939 01 -> 10
940 10 -> 10
941 11 -> 00 */
942 TCGv low = tcg_temp_new();
943
944 /* Force addr into the temp. */
945 if (addr != &t) {
946 t = tcg_temp_new();
947 tcg_gen_mov_tl(t, *addr);
948 addr = &t;
949 }
950
951 tcg_gen_andi_tl(low, t, 3);
952 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
953 tcg_gen_andi_tl(t, t, ~3);
954 tcg_gen_or_tl(t, t, low);
955 tcg_gen_mov_tl(env_imm, t);
956 tcg_temp_free(low);
957 break;
958 }
959
960 case 2:
961 /* 00 -> 10
962 10 -> 00. */
963 /* Force addr into the temp. */
964 if (addr != &t) {
965 t = tcg_temp_new();
966 tcg_gen_xori_tl(t, *addr, 2);
967 addr = &t;
968 } else {
969 tcg_gen_xori_tl(t, t, 2);
970 }
971 break;
972 default:
973 cpu_abort(dc->env, "Invalid reverse size\n");
974 break;
975 }
976 }
977
978 /* If we get a fault on a dslot, the jmpstate better be in sync. */
979 sync_jmpstate(dc);
980
981 /* Verify alignment if needed. */
982 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
983 TCGv v = tcg_temp_new();
984
985 /*
986 * Microblaze gives MMU faults priority over faults due to
987 * unaligned addresses. That's why we speculatively do the load
988 * into v. If the load succeeds, we verify alignment of the
989 * address and if that succeeds we write into the destination reg.
990 */
991 gen_load(dc, v, *addr, size);
992
993 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
994 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
995 tcg_const_tl(0), tcg_const_tl(size - 1));
996 if (dc->rd) {
997 if (rev) {
998 dec_byteswap(dc, cpu_R[dc->rd], v, size);
999 } else {
1000 tcg_gen_mov_tl(cpu_R[dc->rd], v);
1001 }
1002 }
1003 tcg_temp_free(v);
1004 } else {
1005 if (dc->rd) {
1006 gen_load(dc, cpu_R[dc->rd], *addr, size);
1007 if (rev) {
1008 dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size);
1009 }
1010 } else {
1011 /* We are loading into r0, no need to reverse. */
1012 gen_load(dc, env_imm, *addr, size);
1013 }
1014 }
1015
1016 if (addr == &t)
1017 tcg_temp_free(t);
1018 }
1019
1020 static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
1021 unsigned int size)
1022 {
1023 int mem_index = cpu_mmu_index(dc->env);
1024
1025 if (size == 1)
1026 tcg_gen_qemu_st8(val, addr, mem_index);
1027 else if (size == 2) {
1028 tcg_gen_qemu_st16(val, addr, mem_index);
1029 } else if (size == 4) {
1030 tcg_gen_qemu_st32(val, addr, mem_index);
1031 } else
1032 cpu_abort(dc->env, "Incorrect store size %d\n", size);
1033 }
1034
1035 static void dec_store(DisasContext *dc)
1036 {
1037 TCGv t, *addr;
1038 unsigned int size, rev = 0;
1039
1040 size = 1 << (dc->opcode & 3);
1041 if (!dc->type_b) {
1042 rev = (dc->ir >> 9) & 1;
1043 }
1044
1045 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
1046 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1047 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1048 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1049 return;
1050 }
1051
1052 LOG_DIS("s%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "");
1053 t_sync_flags(dc);
1054 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1055 sync_jmpstate(dc);
1056 addr = compute_ldst_addr(dc, &t);
1057
1058 if (rev && size != 4) {
1059 /* Endian reverse the address. t is addr. */
1060 switch (size) {
1061 case 1:
1062 {
1063 /* 00 -> 11
1064 01 -> 10
1065 10 -> 10
1066 11 -> 00 */
1067 TCGv low = tcg_temp_new();
1068
1069 /* Force addr into the temp. */
1070 if (addr != &t) {
1071 t = tcg_temp_new();
1072 tcg_gen_mov_tl(t, *addr);
1073 addr = &t;
1074 }
1075
1076 tcg_gen_andi_tl(low, t, 3);
1077 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1078 tcg_gen_andi_tl(t, t, ~3);
1079 tcg_gen_or_tl(t, t, low);
1080 tcg_gen_mov_tl(env_imm, t);
1081 tcg_temp_free(low);
1082 break;
1083 }
1084
1085 case 2:
1086 /* 00 -> 10
1087 10 -> 00. */
1088 /* Force addr into the temp. */
1089 if (addr != &t) {
1090 t = tcg_temp_new();
1091 tcg_gen_xori_tl(t, *addr, 2);
1092 addr = &t;
1093 } else {
1094 tcg_gen_xori_tl(t, t, 2);
1095 }
1096 break;
1097 default:
1098 cpu_abort(dc->env, "Invalid reverse size\n");
1099 break;
1100 }
1101
1102 if (size != 1) {
1103 TCGv bs_data = tcg_temp_new();
1104 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1105 gen_store(dc, *addr, bs_data, size);
1106 tcg_temp_free(bs_data);
1107 } else {
1108 gen_store(dc, *addr, cpu_R[dc->rd], size);
1109 }
1110 } else {
1111 if (rev) {
1112 TCGv bs_data = tcg_temp_new();
1113 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1114 gen_store(dc, *addr, bs_data, size);
1115 tcg_temp_free(bs_data);
1116 } else {
1117 gen_store(dc, *addr, cpu_R[dc->rd], size);
1118 }
1119 }
1120
1121 /* Verify alignment if needed. */
1122 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1123 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1124 /* FIXME: if the alignment is wrong, we should restore the value
1125 * in memory. One possible way to acheive this is to probe
1126 * the MMU prior to the memaccess, thay way we could put
1127 * the alignment checks in between the probe and the mem
1128 * access.
1129 */
1130 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1131 tcg_const_tl(1), tcg_const_tl(size - 1));
1132 }
1133
1134 if (addr == &t)
1135 tcg_temp_free(t);
1136 }
1137
1138 static inline void eval_cc(DisasContext *dc, unsigned int cc,
1139 TCGv d, TCGv a, TCGv b)
1140 {
1141 switch (cc) {
1142 case CC_EQ:
1143 tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
1144 break;
1145 case CC_NE:
1146 tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
1147 break;
1148 case CC_LT:
1149 tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
1150 break;
1151 case CC_LE:
1152 tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
1153 break;
1154 case CC_GE:
1155 tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
1156 break;
1157 case CC_GT:
1158 tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
1159 break;
1160 default:
1161 cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
1162 break;
1163 }
1164 }
1165
1166 static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
1167 {
1168 int l1;
1169
1170 l1 = gen_new_label();
1171 /* Conditional jmp. */
1172 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
1173 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
1174 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
1175 gen_set_label(l1);
1176 }
1177
1178 static void dec_bcc(DisasContext *dc)
1179 {
1180 unsigned int cc;
1181 unsigned int dslot;
1182
1183 cc = EXTRACT_FIELD(dc->ir, 21, 23);
1184 dslot = dc->ir & (1 << 25);
1185 LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
1186
1187 dc->delayed_branch = 1;
1188 if (dslot) {
1189 dc->delayed_branch = 2;
1190 dc->tb_flags |= D_FLAG;
1191 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1192 cpu_env, offsetof(CPUState, bimm));
1193 }
1194
1195 if (dec_alu_op_b_is_small_imm(dc)) {
1196 int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
1197
1198 tcg_gen_movi_tl(env_btarget, dc->pc + offset);
1199 dc->jmp = JMP_DIRECT_CC;
1200 dc->jmp_pc = dc->pc + offset;
1201 } else {
1202 dc->jmp = JMP_INDIRECT;
1203 tcg_gen_movi_tl(env_btarget, dc->pc);
1204 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1205 }
1206 eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
1207 }
1208
1209 static void dec_br(DisasContext *dc)
1210 {
1211 unsigned int dslot, link, abs;
1212 int mem_index = cpu_mmu_index(dc->env);
1213
1214 dslot = dc->ir & (1 << 20);
1215 abs = dc->ir & (1 << 19);
1216 link = dc->ir & (1 << 18);
1217 LOG_DIS("br%s%s%s%s imm=%x\n",
1218 abs ? "a" : "", link ? "l" : "",
1219 dc->type_b ? "i" : "", dslot ? "d" : "",
1220 dc->imm);
1221
1222 dc->delayed_branch = 1;
1223 if (dslot) {
1224 dc->delayed_branch = 2;
1225 dc->tb_flags |= D_FLAG;
1226 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1227 cpu_env, offsetof(CPUState, bimm));
1228 }
1229 if (link && dc->rd)
1230 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1231
1232 dc->jmp = JMP_INDIRECT;
1233 if (abs) {
1234 tcg_gen_movi_tl(env_btaken, 1);
1235 tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1236 if (link && !dslot) {
1237 if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1238 t_gen_raise_exception(dc, EXCP_BREAK);
1239 if (dc->imm == 0) {
1240 if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
1241 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1242 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1243 return;
1244 }
1245
1246 t_gen_raise_exception(dc, EXCP_DEBUG);
1247 }
1248 }
1249 } else {
1250 if (dec_alu_op_b_is_small_imm(dc)) {
1251 dc->jmp = JMP_DIRECT;
1252 dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1253 } else {
1254 tcg_gen_movi_tl(env_btaken, 1);
1255 tcg_gen_movi_tl(env_btarget, dc->pc);
1256 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1257 }
1258 }
1259 }
1260
1261 static inline void do_rti(DisasContext *dc)
1262 {
1263 TCGv t0, t1;
1264 t0 = tcg_temp_new();
1265 t1 = tcg_temp_new();
1266 tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1267 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1268 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1269
1270 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1271 tcg_gen_or_tl(t1, t1, t0);
1272 msr_write(dc, t1);
1273 tcg_temp_free(t1);
1274 tcg_temp_free(t0);
1275 dc->tb_flags &= ~DRTI_FLAG;
1276 }
1277
1278 static inline void do_rtb(DisasContext *dc)
1279 {
1280 TCGv t0, t1;
1281 t0 = tcg_temp_new();
1282 t1 = tcg_temp_new();
1283 tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1284 tcg_gen_shri_tl(t0, t1, 1);
1285 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1286
1287 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1288 tcg_gen_or_tl(t1, t1, t0);
1289 msr_write(dc, t1);
1290 tcg_temp_free(t1);
1291 tcg_temp_free(t0);
1292 dc->tb_flags &= ~DRTB_FLAG;
1293 }
1294
1295 static inline void do_rte(DisasContext *dc)
1296 {
1297 TCGv t0, t1;
1298 t0 = tcg_temp_new();
1299 t1 = tcg_temp_new();
1300
1301 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1302 tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1303 tcg_gen_shri_tl(t0, t1, 1);
1304 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1305
1306 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1307 tcg_gen_or_tl(t1, t1, t0);
1308 msr_write(dc, t1);
1309 tcg_temp_free(t1);
1310 tcg_temp_free(t0);
1311 dc->tb_flags &= ~DRTE_FLAG;
1312 }
1313
1314 static void dec_rts(DisasContext *dc)
1315 {
1316 unsigned int b_bit, i_bit, e_bit;
1317 int mem_index = cpu_mmu_index(dc->env);
1318
1319 i_bit = dc->ir & (1 << 21);
1320 b_bit = dc->ir & (1 << 22);
1321 e_bit = dc->ir & (1 << 23);
1322
1323 dc->delayed_branch = 2;
1324 dc->tb_flags |= D_FLAG;
1325 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1326 cpu_env, offsetof(CPUState, bimm));
1327
1328 if (i_bit) {
1329 LOG_DIS("rtid ir=%x\n", dc->ir);
1330 if ((dc->tb_flags & MSR_EE_FLAG)
1331 && mem_index == MMU_USER_IDX) {
1332 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1333 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1334 }
1335 dc->tb_flags |= DRTI_FLAG;
1336 } else if (b_bit) {
1337 LOG_DIS("rtbd ir=%x\n", dc->ir);
1338 if ((dc->tb_flags & MSR_EE_FLAG)
1339 && mem_index == MMU_USER_IDX) {
1340 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1341 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1342 }
1343 dc->tb_flags |= DRTB_FLAG;
1344 } else if (e_bit) {
1345 LOG_DIS("rted ir=%x\n", dc->ir);
1346 if ((dc->tb_flags & MSR_EE_FLAG)
1347 && mem_index == MMU_USER_IDX) {
1348 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1349 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1350 }
1351 dc->tb_flags |= DRTE_FLAG;
1352 } else
1353 LOG_DIS("rts ir=%x\n", dc->ir);
1354
1355 dc->jmp = JMP_INDIRECT;
1356 tcg_gen_movi_tl(env_btaken, 1);
1357 tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1358 }
1359
1360 static int dec_check_fpuv2(DisasContext *dc)
1361 {
1362 int r;
1363
1364 r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1365
1366 if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1367 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1368 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1369 }
1370 return r;
1371 }
1372
1373 static void dec_fpu(DisasContext *dc)
1374 {
1375 unsigned int fpu_insn;
1376
1377 if ((dc->tb_flags & MSR_EE_FLAG)
1378 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1379 && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1380 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1381 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1382 return;
1383 }
1384
1385 fpu_insn = (dc->ir >> 7) & 7;
1386
1387 switch (fpu_insn) {
1388 case 0:
1389 gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1390 break;
1391
1392 case 1:
1393 gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1394 break;
1395
1396 case 2:
1397 gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1398 break;
1399
1400 case 3:
1401 gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1402 break;
1403
1404 case 4:
1405 switch ((dc->ir >> 4) & 7) {
1406 case 0:
1407 gen_helper_fcmp_un(cpu_R[dc->rd],
1408 cpu_R[dc->ra], cpu_R[dc->rb]);
1409 break;
1410 case 1:
1411 gen_helper_fcmp_lt(cpu_R[dc->rd],
1412 cpu_R[dc->ra], cpu_R[dc->rb]);
1413 break;
1414 case 2:
1415 gen_helper_fcmp_eq(cpu_R[dc->rd],
1416 cpu_R[dc->ra], cpu_R[dc->rb]);
1417 break;
1418 case 3:
1419 gen_helper_fcmp_le(cpu_R[dc->rd],
1420 cpu_R[dc->ra], cpu_R[dc->rb]);
1421 break;
1422 case 4:
1423 gen_helper_fcmp_gt(cpu_R[dc->rd],
1424 cpu_R[dc->ra], cpu_R[dc->rb]);
1425 break;
1426 case 5:
1427 gen_helper_fcmp_ne(cpu_R[dc->rd],
1428 cpu_R[dc->ra], cpu_R[dc->rb]);
1429 break;
1430 case 6:
1431 gen_helper_fcmp_ge(cpu_R[dc->rd],
1432 cpu_R[dc->ra], cpu_R[dc->rb]);
1433 break;
1434 default:
1435 qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
1436 fpu_insn, dc->pc, dc->opcode);
1437 dc->abort_at_next_insn = 1;
1438 break;
1439 }
1440 break;
1441
1442 case 5:
1443 if (!dec_check_fpuv2(dc)) {
1444 return;
1445 }
1446 gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]);
1447 break;
1448
1449 case 6:
1450 if (!dec_check_fpuv2(dc)) {
1451 return;
1452 }
1453 gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]);
1454 break;
1455
1456 case 7:
1457 if (!dec_check_fpuv2(dc)) {
1458 return;
1459 }
1460 gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]);
1461 break;
1462
1463 default:
1464 qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
1465 fpu_insn, dc->pc, dc->opcode);
1466 dc->abort_at_next_insn = 1;
1467 break;
1468 }
1469 }
1470
1471 static void dec_null(DisasContext *dc)
1472 {
1473 if ((dc->tb_flags & MSR_EE_FLAG)
1474 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1475 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1476 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1477 return;
1478 }
1479 qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1480 dc->abort_at_next_insn = 1;
1481 }
1482
1483 /* Insns connected to FSL or AXI stream attached devices. */
1484 static void dec_stream(DisasContext *dc)
1485 {
1486 int mem_index = cpu_mmu_index(dc->env);
1487 TCGv_i32 t_id, t_ctrl;
1488 int ctrl;
1489
1490 LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put",
1491 dc->type_b ? "" : "d", dc->imm);
1492
1493 if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
1494 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1495 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1496 return;
1497 }
1498
1499 t_id = tcg_temp_new();
1500 if (dc->type_b) {
1501 tcg_gen_movi_tl(t_id, dc->imm & 0xf);
1502 ctrl = dc->imm >> 10;
1503 } else {
1504 tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
1505 ctrl = dc->imm >> 5;
1506 }
1507
1508 t_ctrl = tcg_const_tl(ctrl);
1509
1510 if (dc->rd == 0) {
1511 gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
1512 } else {
1513 gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
1514 }
1515 tcg_temp_free(t_id);
1516 tcg_temp_free(t_ctrl);
1517 }
1518
1519 static struct decoder_info {
1520 struct {
1521 uint32_t bits;
1522 uint32_t mask;
1523 };
1524 void (*dec)(DisasContext *dc);
1525 } decinfo[] = {
1526 {DEC_ADD, dec_add},
1527 {DEC_SUB, dec_sub},
1528 {DEC_AND, dec_and},
1529 {DEC_XOR, dec_xor},
1530 {DEC_OR, dec_or},
1531 {DEC_BIT, dec_bit},
1532 {DEC_BARREL, dec_barrel},
1533 {DEC_LD, dec_load},
1534 {DEC_ST, dec_store},
1535 {DEC_IMM, dec_imm},
1536 {DEC_BR, dec_br},
1537 {DEC_BCC, dec_bcc},
1538 {DEC_RTS, dec_rts},
1539 {DEC_FPU, dec_fpu},
1540 {DEC_MUL, dec_mul},
1541 {DEC_DIV, dec_div},
1542 {DEC_MSR, dec_msr},
1543 {DEC_STREAM, dec_stream},
1544 {{0, 0}, dec_null}
1545 };
1546
1547 static inline void decode(DisasContext *dc)
1548 {
1549 uint32_t ir;
1550 int i;
1551
1552 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
1553 tcg_gen_debug_insn_start(dc->pc);
1554
1555 dc->ir = ir = ldl_code(dc->pc);
1556 LOG_DIS("%8.8x\t", dc->ir);
1557
1558 if (dc->ir)
1559 dc->nr_nops = 0;
1560 else {
1561 if ((dc->tb_flags & MSR_EE_FLAG)
1562 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1563 && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1564 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1565 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1566 return;
1567 }
1568
1569 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1570 dc->nr_nops++;
1571 if (dc->nr_nops > 4)
1572 cpu_abort(dc->env, "fetching nop sequence\n");
1573 }
1574 /* bit 2 seems to indicate insn type. */
1575 dc->type_b = ir & (1 << 29);
1576
1577 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1578 dc->rd = EXTRACT_FIELD(ir, 21, 25);
1579 dc->ra = EXTRACT_FIELD(ir, 16, 20);
1580 dc->rb = EXTRACT_FIELD(ir, 11, 15);
1581 dc->imm = EXTRACT_FIELD(ir, 0, 15);
1582
1583 /* Large switch for all insns. */
1584 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1585 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1586 decinfo[i].dec(dc);
1587 break;
1588 }
1589 }
1590 }
1591
1592 static void check_breakpoint(CPUState *env, DisasContext *dc)
1593 {
1594 CPUBreakpoint *bp;
1595
1596 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1597 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1598 if (bp->pc == dc->pc) {
1599 t_gen_raise_exception(dc, EXCP_DEBUG);
1600 dc->is_jmp = DISAS_UPDATE;
1601 }
1602 }
1603 }
1604 }
1605
1606 /* generate intermediate code for basic block 'tb'. */
1607 static void
1608 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
1609 int search_pc)
1610 {
1611 uint16_t *gen_opc_end;
1612 uint32_t pc_start;
1613 int j, lj;
1614 struct DisasContext ctx;
1615 struct DisasContext *dc = &ctx;
1616 uint32_t next_page_start, org_flags;
1617 target_ulong npc;
1618 int num_insns;
1619 int max_insns;
1620
1621 qemu_log_try_set_file(stderr);
1622
1623 pc_start = tb->pc;
1624 dc->env = env;
1625 dc->tb = tb;
1626 org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1627
1628 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
1629
1630 dc->is_jmp = DISAS_NEXT;
1631 dc->jmp = 0;
1632 dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1633 if (dc->delayed_branch) {
1634 dc->jmp = JMP_INDIRECT;
1635 }
1636 dc->pc = pc_start;
1637 dc->singlestep_enabled = env->singlestep_enabled;
1638 dc->cpustate_changed = 0;
1639 dc->abort_at_next_insn = 0;
1640 dc->nr_nops = 0;
1641
1642 if (pc_start & 3)
1643 cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1644
1645 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1646 #if !SIM_COMPAT
1647 qemu_log("--------------\n");
1648 log_cpu_state(env, 0);
1649 #endif
1650 }
1651
1652 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1653 lj = -1;
1654 num_insns = 0;
1655 max_insns = tb->cflags & CF_COUNT_MASK;
1656 if (max_insns == 0)
1657 max_insns = CF_COUNT_MASK;
1658
1659 gen_icount_start();
1660 do
1661 {
1662 #if SIM_COMPAT
1663 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1664 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1665 gen_helper_debug();
1666 }
1667 #endif
1668 check_breakpoint(env, dc);
1669
1670 if (search_pc) {
1671 j = gen_opc_ptr - gen_opc_buf;
1672 if (lj < j) {
1673 lj++;
1674 while (lj < j)
1675 gen_opc_instr_start[lj++] = 0;
1676 }
1677 gen_opc_pc[lj] = dc->pc;
1678 gen_opc_instr_start[lj] = 1;
1679 gen_opc_icount[lj] = num_insns;
1680 }
1681
1682 /* Pretty disas. */
1683 LOG_DIS("%8.8x:\t", dc->pc);
1684
1685 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1686 gen_io_start();
1687
1688 dc->clear_imm = 1;
1689 decode(dc);
1690 if (dc->clear_imm)
1691 dc->tb_flags &= ~IMM_FLAG;
1692 dc->pc += 4;
1693 num_insns++;
1694
1695 if (dc->delayed_branch) {
1696 dc->delayed_branch--;
1697 if (!dc->delayed_branch) {
1698 if (dc->tb_flags & DRTI_FLAG)
1699 do_rti(dc);
1700 if (dc->tb_flags & DRTB_FLAG)
1701 do_rtb(dc);
1702 if (dc->tb_flags & DRTE_FLAG)
1703 do_rte(dc);
1704 /* Clear the delay slot flag. */
1705 dc->tb_flags &= ~D_FLAG;
1706 /* If it is a direct jump, try direct chaining. */
1707 if (dc->jmp == JMP_INDIRECT) {
1708 eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1709 dc->is_jmp = DISAS_JUMP;
1710 } else if (dc->jmp == JMP_DIRECT) {
1711 t_sync_flags(dc);
1712 gen_goto_tb(dc, 0, dc->jmp_pc);
1713 dc->is_jmp = DISAS_TB_JUMP;
1714 } else if (dc->jmp == JMP_DIRECT_CC) {
1715 int l1;
1716
1717 t_sync_flags(dc);
1718 l1 = gen_new_label();
1719 /* Conditional jmp. */
1720 tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1721 gen_goto_tb(dc, 1, dc->pc);
1722 gen_set_label(l1);
1723 gen_goto_tb(dc, 0, dc->jmp_pc);
1724
1725 dc->is_jmp = DISAS_TB_JUMP;
1726 }
1727 break;
1728 }
1729 }
1730 if (env->singlestep_enabled)
1731 break;
1732 } while (!dc->is_jmp && !dc->cpustate_changed
1733 && gen_opc_ptr < gen_opc_end
1734 && !singlestep
1735 && (dc->pc < next_page_start)
1736 && num_insns < max_insns);
1737
1738 npc = dc->pc;
1739 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1740 if (dc->tb_flags & D_FLAG) {
1741 dc->is_jmp = DISAS_UPDATE;
1742 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1743 sync_jmpstate(dc);
1744 } else
1745 npc = dc->jmp_pc;
1746 }
1747
1748 if (tb->cflags & CF_LAST_IO)
1749 gen_io_end();
1750 /* Force an update if the per-tb cpu state has changed. */
1751 if (dc->is_jmp == DISAS_NEXT
1752 && (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1753 dc->is_jmp = DISAS_UPDATE;
1754 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1755 }
1756 t_sync_flags(dc);
1757
1758 if (unlikely(env->singlestep_enabled)) {
1759 TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
1760
1761 if (dc->is_jmp != DISAS_JUMP) {
1762 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1763 }
1764 gen_helper_raise_exception(tmp);
1765 tcg_temp_free_i32(tmp);
1766 } else {
1767 switch(dc->is_jmp) {
1768 case DISAS_NEXT:
1769 gen_goto_tb(dc, 1, npc);
1770 break;
1771 default:
1772 case DISAS_JUMP:
1773 case DISAS_UPDATE:
1774 /* indicate that the hash table must be used
1775 to find the next TB */
1776 tcg_gen_exit_tb(0);
1777 break;
1778 case DISAS_TB_JUMP:
1779 /* nothing more to generate */
1780 break;
1781 }
1782 }
1783 gen_icount_end(tb, num_insns);
1784 *gen_opc_ptr = INDEX_op_end;
1785 if (search_pc) {
1786 j = gen_opc_ptr - gen_opc_buf;
1787 lj++;
1788 while (lj <= j)
1789 gen_opc_instr_start[lj++] = 0;
1790 } else {
1791 tb->size = dc->pc - pc_start;
1792 tb->icount = num_insns;
1793 }
1794
1795 #ifdef DEBUG_DISAS
1796 #if !SIM_COMPAT
1797 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1798 qemu_log("\n");
1799 #if DISAS_GNU
1800 log_target_disas(pc_start, dc->pc - pc_start, 0);
1801 #endif
1802 qemu_log("\nisize=%d osize=%td\n",
1803 dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
1804 }
1805 #endif
1806 #endif
1807 assert(!dc->abort_at_next_insn);
1808 }
1809
1810 void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
1811 {
1812 gen_intermediate_code_internal(env, tb, 0);
1813 }
1814
1815 void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
1816 {
1817 gen_intermediate_code_internal(env, tb, 1);
1818 }
1819
1820 void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
1821 int flags)
1822 {
1823 int i;
1824
1825 if (!env || !f)
1826 return;
1827
1828 cpu_fprintf(f, "IN: PC=%x %s\n",
1829 env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1830 cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1831 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1832 env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1833 cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1834 env->btaken, env->btarget,
1835 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1836 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1837 (env->sregs[SR_MSR] & MSR_EIP),
1838 (env->sregs[SR_MSR] & MSR_IE));
1839
1840 for (i = 0; i < 32; i++) {
1841 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1842 if ((i + 1) % 4 == 0)
1843 cpu_fprintf(f, "\n");
1844 }
1845 cpu_fprintf(f, "\n\n");
1846 }
1847
1848 CPUState *cpu_mb_init (const char *cpu_model)
1849 {
1850 CPUState *env;
1851 static int tcg_initialized = 0;
1852 int i;
1853
1854 env = g_malloc0(sizeof(CPUState));
1855
1856 cpu_exec_init(env);
1857 cpu_reset(env);
1858 qemu_init_vcpu(env);
1859 set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
1860
1861 if (tcg_initialized)
1862 return env;
1863
1864 tcg_initialized = 1;
1865
1866 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1867
1868 env_debug = tcg_global_mem_new(TCG_AREG0,
1869 offsetof(CPUState, debug),
1870 "debug0");
1871 env_iflags = tcg_global_mem_new(TCG_AREG0,
1872 offsetof(CPUState, iflags),
1873 "iflags");
1874 env_imm = tcg_global_mem_new(TCG_AREG0,
1875 offsetof(CPUState, imm),
1876 "imm");
1877 env_btarget = tcg_global_mem_new(TCG_AREG0,
1878 offsetof(CPUState, btarget),
1879 "btarget");
1880 env_btaken = tcg_global_mem_new(TCG_AREG0,
1881 offsetof(CPUState, btaken),
1882 "btaken");
1883 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1884 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1885 offsetof(CPUState, regs[i]),
1886 regnames[i]);
1887 }
1888 for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
1889 cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
1890 offsetof(CPUState, sregs[i]),
1891 special_regnames[i]);
1892 }
1893 #define GEN_HELPER 2
1894 #include "helper.h"
1895
1896 return env;
1897 }
1898
1899 void cpu_reset (CPUState *env)
1900 {
1901 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
1902 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
1903 log_cpu_state(env, 0);
1904 }
1905
1906 memset(env, 0, offsetof(CPUMBState, breakpoints));
1907 tlb_flush(env, 1);
1908
1909 env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
1910 | PVR0_USE_BARREL_MASK \
1911 | PVR0_USE_DIV_MASK \
1912 | PVR0_USE_HW_MUL_MASK \
1913 | PVR0_USE_EXC_MASK \
1914 | PVR0_USE_ICACHE_MASK \
1915 | PVR0_USE_DCACHE_MASK \
1916 | PVR0_USE_MMU \
1917 | (0xb << 8);
1918 env->pvr.regs[2] = PVR2_D_OPB_MASK \
1919 | PVR2_D_LMB_MASK \
1920 | PVR2_I_OPB_MASK \
1921 | PVR2_I_LMB_MASK \
1922 | PVR2_USE_MSR_INSTR \
1923 | PVR2_USE_PCMP_INSTR \
1924 | PVR2_USE_BARREL_MASK \
1925 | PVR2_USE_DIV_MASK \
1926 | PVR2_USE_HW_MUL_MASK \
1927 | PVR2_USE_MUL64_MASK \
1928 | PVR2_USE_FPU_MASK \
1929 | PVR2_USE_FPU2_MASK \
1930 | PVR2_FPU_EXC_MASK \
1931 | 0;
1932 env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */
1933 env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
1934
1935 #if defined(CONFIG_USER_ONLY)
1936 /* start in user mode with interrupts enabled. */
1937 env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
1938 env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */
1939 #else
1940 env->sregs[SR_MSR] = 0;
1941 mmu_init(&env->mmu);
1942 env->mmu.c_mmu = 3;
1943 env->mmu.c_mmu_tlb_access = 3;
1944 env->mmu.c_mmu_zones = 16;
1945 #endif
1946 }
1947
1948 void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos)
1949 {
1950 env->sregs[SR_PC] = gen_opc_pc[pc_pos];
1951 }
QEmu