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[qemu.git] / target-microblaze / translate.c
blobc018c99826bc56f85608264a1c15b768c067c9b1
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 "exec-all.h"
29 #include "disas.h"
30 #include "tcg-op.h"
31 #include "helper.h"
32 #include "microblaze-decode.h"
33 #include "qemu-common.h"
34
35 #define GEN_HELPER 1
36 #include "helper.h"
37
38 #define SIM_COMPAT 0
39 #define DISAS_GNU 1
40 #define DISAS_MB 1
41 #if DISAS_MB && !SIM_COMPAT
42 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
43 #else
44 # define LOG_DIS(...) do { } while (0)
45 #endif
46
47 #define D(x)
48
49 #define EXTRACT_FIELD(src, start, end) \
50 (((src) >> start) & ((1 << (end - start + 1)) - 1))
51
52 static TCGv env_debug;
53 static TCGv_ptr cpu_env;
54 static TCGv cpu_R[32];
55 static TCGv cpu_SR[18];
56 static TCGv env_imm;
57 static TCGv env_btaken;
58 static TCGv env_btarget;
59 static TCGv env_iflags;
60
61 #include "gen-icount.h"
62
63 /* This is the state at translation time. */
64 typedef struct DisasContext {
65 CPUState *env;
66 target_ulong pc;
67
68 /* Decoder. */
69 int type_b;
70 uint32_t ir;
71 uint8_t opcode;
72 uint8_t rd, ra, rb;
73 uint16_t imm;
74
75 unsigned int cpustate_changed;
76 unsigned int delayed_branch;
77 unsigned int tb_flags, synced_flags; /* tb dependent flags. */
78 unsigned int clear_imm;
79 int is_jmp;
80
81 #define JMP_NOJMP 0
82 #define JMP_DIRECT 1
83 #define JMP_INDIRECT 2
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((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 /* True if ALU operand b is a small immediate that may deserve
156 faster treatment. */
157 static inline int dec_alu_op_b_is_small_imm(DisasContext *dc)
158 {
159 /* Immediate insn without the imm prefix ? */
160 return dc->type_b && !(dc->tb_flags & IMM_FLAG);
161 }
162
163 static inline TCGv *dec_alu_op_b(DisasContext *dc)
164 {
165 if (dc->type_b) {
166 if (dc->tb_flags & IMM_FLAG)
167 tcg_gen_ori_tl(env_imm, env_imm, dc->imm);
168 else
169 tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm));
170 return &env_imm;
171 } else
172 return &cpu_R[dc->rb];
173 }
174
175 static void dec_add(DisasContext *dc)
176 {
177 unsigned int k, c;
178
179 k = dc->opcode & 4;
180 c = dc->opcode & 2;
181
182 LOG_DIS("add%s%s%s r%d r%d r%d\n",
183 dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "",
184 dc->rd, dc->ra, dc->rb);
185
186 if (k && !c && dc->rd)
187 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
188 else if (dc->rd)
189 gen_helper_addkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)),
190 tcg_const_tl(k), tcg_const_tl(c));
191 else {
192 TCGv d = tcg_temp_new();
193 gen_helper_addkc(d, cpu_R[dc->ra], *(dec_alu_op_b(dc)),
194 tcg_const_tl(k), tcg_const_tl(c));
195 tcg_temp_free(d);
196 }
197 }
198
199 static void dec_sub(DisasContext *dc)
200 {
201 unsigned int u, cmp, k, c;
202
203 u = dc->imm & 2;
204 k = dc->opcode & 4;
205 c = dc->opcode & 2;
206 cmp = (dc->imm & 1) && (!dc->type_b) && k;
207
208 if (cmp) {
209 LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir);
210 if (dc->rd) {
211 if (u)
212 gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
213 else
214 gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
215 }
216 } else {
217 LOG_DIS("sub%s%s r%d, r%d r%d\n",
218 k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb);
219
220 if (!k || c) {
221 TCGv t;
222 t = tcg_temp_new();
223 if (dc->rd)
224 gen_helper_subkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)),
225 tcg_const_tl(k), tcg_const_tl(c));
226 else
227 gen_helper_subkc(t, cpu_R[dc->ra], *(dec_alu_op_b(dc)),
228 tcg_const_tl(k), tcg_const_tl(c));
229 tcg_temp_free(t);
230 }
231 else if (dc->rd)
232 tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
233 }
234 }
235
236 static void dec_pattern(DisasContext *dc)
237 {
238 unsigned int mode;
239 int l1;
240
241 if ((dc->tb_flags & MSR_EE_FLAG)
242 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
243 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
244 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
245 t_gen_raise_exception(dc, EXCP_HW_EXCP);
246 }
247
248 mode = dc->opcode & 3;
249 switch (mode) {
250 case 0:
251 /* pcmpbf. */
252 LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
253 if (dc->rd)
254 gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
255 break;
256 case 2:
257 LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
258 if (dc->rd) {
259 TCGv t0 = tcg_temp_local_new();
260 l1 = gen_new_label();
261 tcg_gen_movi_tl(t0, 1);
262 tcg_gen_brcond_tl(TCG_COND_EQ,
263 cpu_R[dc->ra], cpu_R[dc->rb], l1);
264 tcg_gen_movi_tl(t0, 0);
265 gen_set_label(l1);
266 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
267 tcg_temp_free(t0);
268 }
269 break;
270 case 3:
271 LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
272 l1 = gen_new_label();
273 if (dc->rd) {
274 TCGv t0 = tcg_temp_local_new();
275 tcg_gen_movi_tl(t0, 1);
276 tcg_gen_brcond_tl(TCG_COND_NE,
277 cpu_R[dc->ra], cpu_R[dc->rb], l1);
278 tcg_gen_movi_tl(t0, 0);
279 gen_set_label(l1);
280 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
281 tcg_temp_free(t0);
282 }
283 break;
284 default:
285 cpu_abort(dc->env,
286 "unsupported pattern insn opcode=%x\n", dc->opcode);
287 break;
288 }
289 }
290
291 static void dec_and(DisasContext *dc)
292 {
293 unsigned int not;
294
295 if (!dc->type_b && (dc->imm & (1 << 10))) {
296 dec_pattern(dc);
297 return;
298 }
299
300 not = dc->opcode & (1 << 1);
301 LOG_DIS("and%s\n", not ? "n" : "");
302
303 if (!dc->rd)
304 return;
305
306 if (not) {
307 TCGv t = tcg_temp_new();
308 tcg_gen_not_tl(t, *(dec_alu_op_b(dc)));
309 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t);
310 tcg_temp_free(t);
311 } else
312 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
313 }
314
315 static void dec_or(DisasContext *dc)
316 {
317 if (!dc->type_b && (dc->imm & (1 << 10))) {
318 dec_pattern(dc);
319 return;
320 }
321
322 LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
323 if (dc->rd)
324 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
325 }
326
327 static void dec_xor(DisasContext *dc)
328 {
329 if (!dc->type_b && (dc->imm & (1 << 10))) {
330 dec_pattern(dc);
331 return;
332 }
333
334 LOG_DIS("xor r%d\n", dc->rd);
335 if (dc->rd)
336 tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
337 }
338
339 static void read_carry(DisasContext *dc, TCGv d)
340 {
341 tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
342 }
343
344 static void write_carry(DisasContext *dc, TCGv v)
345 {
346 TCGv t0 = tcg_temp_new();
347 tcg_gen_shli_tl(t0, v, 31);
348 tcg_gen_sari_tl(t0, t0, 31);
349 tcg_gen_mov_tl(env_debug, t0);
350 tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC));
351 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
352 ~(MSR_C | MSR_CC));
353 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
354 tcg_temp_free(t0);
355 }
356
357
358 static inline void msr_read(DisasContext *dc, TCGv d)
359 {
360 tcg_gen_mov_tl(d, cpu_SR[SR_MSR]);
361 }
362
363 static inline void msr_write(DisasContext *dc, TCGv v)
364 {
365 dc->cpustate_changed = 1;
366 tcg_gen_mov_tl(cpu_SR[SR_MSR], v);
367 /* PVR, we have a processor version register. */
368 tcg_gen_ori_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], (1 << 10));
369 }
370
371 static void dec_msr(DisasContext *dc)
372 {
373 TCGv t0, t1;
374 unsigned int sr, to, rn;
375 int mem_index = cpu_mmu_index(dc->env);
376
377 sr = dc->imm & ((1 << 14) - 1);
378 to = dc->imm & (1 << 14);
379 dc->type_b = 1;
380 if (to)
381 dc->cpustate_changed = 1;
382
383 /* msrclr and msrset. */
384 if (!(dc->imm & (1 << 15))) {
385 unsigned int clr = dc->ir & (1 << 16);
386
387 LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set",
388 dc->rd, dc->imm);
389
390 if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) {
391 /* nop??? */
392 return;
393 }
394
395 if ((dc->tb_flags & MSR_EE_FLAG)
396 && mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) {
397 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
398 t_gen_raise_exception(dc, EXCP_HW_EXCP);
399 return;
400 }
401
402 if (dc->rd)
403 msr_read(dc, cpu_R[dc->rd]);
404
405 t0 = tcg_temp_new();
406 t1 = tcg_temp_new();
407 msr_read(dc, t0);
408 tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc)));
409
410 if (clr) {
411 tcg_gen_not_tl(t1, t1);
412 tcg_gen_and_tl(t0, t0, t1);
413 } else
414 tcg_gen_or_tl(t0, t0, t1);
415 msr_write(dc, t0);
416 tcg_temp_free(t0);
417 tcg_temp_free(t1);
418 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
419 dc->is_jmp = DISAS_UPDATE;
420 return;
421 }
422
423 if (to) {
424 if ((dc->tb_flags & MSR_EE_FLAG)
425 && mem_index == MMU_USER_IDX) {
426 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
427 t_gen_raise_exception(dc, EXCP_HW_EXCP);
428 return;
429 }
430 }
431
432 #if !defined(CONFIG_USER_ONLY)
433 /* Catch read/writes to the mmu block. */
434 if ((sr & ~0xff) == 0x1000) {
435 sr &= 7;
436 LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
437 if (to)
438 gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]);
439 else
440 gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr));
441 return;
442 }
443 #endif
444
445 if (to) {
446 LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
447 switch (sr) {
448 case 0:
449 break;
450 case 1:
451 msr_write(dc, cpu_R[dc->ra]);
452 break;
453 case 0x3:
454 tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]);
455 break;
456 case 0x5:
457 tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]);
458 break;
459 case 0x7:
460 tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
461 break;
462 default:
463 cpu_abort(dc->env, "unknown mts reg %x\n", sr);
464 break;
465 }
466 } else {
467 LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm);
468
469 switch (sr) {
470 case 0:
471 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
472 break;
473 case 1:
474 msr_read(dc, cpu_R[dc->rd]);
475 break;
476 case 0x3:
477 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]);
478 break;
479 case 0x5:
480 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]);
481 break;
482 case 0x7:
483 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]);
484 break;
485 case 0xb:
486 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]);
487 break;
488 case 0x2000:
489 case 0x2001:
490 case 0x2002:
491 case 0x2003:
492 case 0x2004:
493 case 0x2005:
494 case 0x2006:
495 case 0x2007:
496 case 0x2008:
497 case 0x2009:
498 case 0x200a:
499 case 0x200b:
500 case 0x200c:
501 rn = sr & 0xf;
502 tcg_gen_ld_tl(cpu_R[dc->rd],
503 cpu_env, offsetof(CPUState, pvr.regs[rn]));
504 break;
505 default:
506 cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
507 break;
508 }
509 }
510
511 if (dc->rd == 0) {
512 tcg_gen_movi_tl(cpu_R[0], 0);
513 }
514 }
515
516 /* 64-bit signed mul, lower result in d and upper in d2. */
517 static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
518 {
519 TCGv_i64 t0, t1;
520
521 t0 = tcg_temp_new_i64();
522 t1 = tcg_temp_new_i64();
523
524 tcg_gen_ext_i32_i64(t0, a);
525 tcg_gen_ext_i32_i64(t1, b);
526 tcg_gen_mul_i64(t0, t0, t1);
527
528 tcg_gen_trunc_i64_i32(d, t0);
529 tcg_gen_shri_i64(t0, t0, 32);
530 tcg_gen_trunc_i64_i32(d2, t0);
531
532 tcg_temp_free_i64(t0);
533 tcg_temp_free_i64(t1);
534 }
535
536 /* 64-bit unsigned muls, lower result in d and upper in d2. */
537 static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
538 {
539 TCGv_i64 t0, t1;
540
541 t0 = tcg_temp_new_i64();
542 t1 = tcg_temp_new_i64();
543
544 tcg_gen_extu_i32_i64(t0, a);
545 tcg_gen_extu_i32_i64(t1, b);
546 tcg_gen_mul_i64(t0, t0, t1);
547
548 tcg_gen_trunc_i64_i32(d, t0);
549 tcg_gen_shri_i64(t0, t0, 32);
550 tcg_gen_trunc_i64_i32(d2, t0);
551
552 tcg_temp_free_i64(t0);
553 tcg_temp_free_i64(t1);
554 }
555
556 /* Multiplier unit. */
557 static void dec_mul(DisasContext *dc)
558 {
559 TCGv d[2];
560 unsigned int subcode;
561
562 if ((dc->tb_flags & MSR_EE_FLAG)
563 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
564 && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
565 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
566 t_gen_raise_exception(dc, EXCP_HW_EXCP);
567 return;
568 }
569
570 subcode = dc->imm & 3;
571 d[0] = tcg_temp_new();
572 d[1] = tcg_temp_new();
573
574 if (dc->type_b) {
575 LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
576 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
577 goto done;
578 }
579
580 /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
581 if (subcode >= 1 && subcode <= 3
582 && !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
583 /* nop??? */
584 }
585
586 switch (subcode) {
587 case 0:
588 LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
589 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
590 break;
591 case 1:
592 LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
593 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
594 break;
595 case 2:
596 LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
597 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
598 break;
599 case 3:
600 LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
601 t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
602 break;
603 default:
604 cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
605 break;
606 }
607 done:
608 tcg_temp_free(d[0]);
609 tcg_temp_free(d[1]);
610 }
611
612 /* Div unit. */
613 static void dec_div(DisasContext *dc)
614 {
615 unsigned int u;
616
617 u = dc->imm & 2;
618 LOG_DIS("div\n");
619
620 if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
621 && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
622 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
623 t_gen_raise_exception(dc, EXCP_HW_EXCP);
624 }
625
626 if (u)
627 gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
628 else
629 gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
630 if (!dc->rd)
631 tcg_gen_movi_tl(cpu_R[dc->rd], 0);
632 }
633
634 static void dec_barrel(DisasContext *dc)
635 {
636 TCGv t0;
637 unsigned int s, t;
638
639 if ((dc->tb_flags & MSR_EE_FLAG)
640 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
641 && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
642 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
643 t_gen_raise_exception(dc, EXCP_HW_EXCP);
644 return;
645 }
646
647 s = dc->imm & (1 << 10);
648 t = dc->imm & (1 << 9);
649
650 LOG_DIS("bs%s%s r%d r%d r%d\n",
651 s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
652
653 t0 = tcg_temp_new();
654
655 tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
656 tcg_gen_andi_tl(t0, t0, 31);
657
658 if (s)
659 tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
660 else {
661 if (t)
662 tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
663 else
664 tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
665 }
666 }
667
668 static void dec_bit(DisasContext *dc)
669 {
670 TCGv t0, t1;
671 unsigned int op;
672 int mem_index = cpu_mmu_index(dc->env);
673
674 op = dc->ir & ((1 << 8) - 1);
675 switch (op) {
676 case 0x21:
677 /* src. */
678 t0 = tcg_temp_new();
679
680 LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
681 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
682 if (dc->rd) {
683 t1 = tcg_temp_new();
684 read_carry(dc, t1);
685 tcg_gen_shli_tl(t1, t1, 31);
686
687 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
688 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
689 tcg_temp_free(t1);
690 }
691
692 /* Update carry. */
693 write_carry(dc, t0);
694 tcg_temp_free(t0);
695 break;
696
697 case 0x1:
698 case 0x41:
699 /* srl. */
700 t0 = tcg_temp_new();
701 LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
702
703 /* Update carry. */
704 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
705 write_carry(dc, t0);
706 tcg_temp_free(t0);
707 if (dc->rd) {
708 if (op == 0x41)
709 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
710 else
711 tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
712 }
713 break;
714 case 0x60:
715 LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
716 tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
717 break;
718 case 0x61:
719 LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
720 tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
721 break;
722 case 0x64:
723 case 0x66:
724 case 0x74:
725 case 0x76:
726 /* wdc. */
727 LOG_DIS("wdc r%d\n", dc->ra);
728 if ((dc->tb_flags & MSR_EE_FLAG)
729 && mem_index == MMU_USER_IDX) {
730 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
731 t_gen_raise_exception(dc, EXCP_HW_EXCP);
732 return;
733 }
734 break;
735 case 0x68:
736 /* wic. */
737 LOG_DIS("wic r%d\n", dc->ra);
738 if ((dc->tb_flags & MSR_EE_FLAG)
739 && mem_index == MMU_USER_IDX) {
740 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
741 t_gen_raise_exception(dc, EXCP_HW_EXCP);
742 return;
743 }
744 break;
745 default:
746 cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
747 dc->pc, op, dc->rd, dc->ra, dc->rb);
748 break;
749 }
750 }
751
752 static inline void sync_jmpstate(DisasContext *dc)
753 {
754 if (dc->jmp == JMP_DIRECT) {
755 dc->jmp = JMP_INDIRECT;
756 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
757 }
758 }
759
760 static void dec_imm(DisasContext *dc)
761 {
762 LOG_DIS("imm %x\n", dc->imm << 16);
763 tcg_gen_movi_tl(env_imm, (dc->imm << 16));
764 dc->tb_flags |= IMM_FLAG;
765 dc->clear_imm = 0;
766 }
767
768 static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
769 unsigned int size)
770 {
771 int mem_index = cpu_mmu_index(dc->env);
772
773 if (size == 1) {
774 tcg_gen_qemu_ld8u(dst, addr, mem_index);
775 } else if (size == 2) {
776 tcg_gen_qemu_ld16u(dst, addr, mem_index);
777 } else if (size == 4) {
778 tcg_gen_qemu_ld32u(dst, addr, mem_index);
779 } else
780 cpu_abort(dc->env, "Incorrect load size %d\n", size);
781 }
782
783 static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
784 {
785 unsigned int extimm = dc->tb_flags & IMM_FLAG;
786
787 /* Treat the fast cases first. */
788 if (!dc->type_b) {
789 /* If any of the regs is r0, return a ptr to the other. */
790 if (dc->ra == 0) {
791 return &cpu_R[dc->rb];
792 } else if (dc->rb == 0) {
793 return &cpu_R[dc->ra];
794 }
795
796 *t = tcg_temp_new();
797 tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
798 return t;
799 }
800 /* Immediate. */
801 if (!extimm) {
802 if (dc->imm == 0) {
803 return &cpu_R[dc->ra];
804 }
805 *t = tcg_temp_new();
806 tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
807 tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
808 } else {
809 *t = tcg_temp_new();
810 tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
811 }
812
813 return t;
814 }
815
816 static void dec_load(DisasContext *dc)
817 {
818 TCGv t, *addr;
819 unsigned int size;
820
821 size = 1 << (dc->opcode & 3);
822 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
823 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
824 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
825 t_gen_raise_exception(dc, EXCP_HW_EXCP);
826 return;
827 }
828
829 LOG_DIS("l %x %d\n", dc->opcode, size);
830 t_sync_flags(dc);
831 addr = compute_ldst_addr(dc, &t);
832
833 /* If we get a fault on a dslot, the jmpstate better be in sync. */
834 sync_jmpstate(dc);
835
836 /* Verify alignment if needed. */
837 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
838 TCGv v = tcg_temp_new();
839
840 /*
841 * Microblaze gives MMU faults priority over faults due to
842 * unaligned addresses. That's why we speculatively do the load
843 * into v. If the load succeeds, we verify alignment of the
844 * address and if that succeeds we write into the destination reg.
845 */
846 gen_load(dc, v, *addr, size);
847
848 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
849 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
850 tcg_const_tl(0), tcg_const_tl(size - 1));
851 if (dc->rd)
852 tcg_gen_mov_tl(cpu_R[dc->rd], v);
853 tcg_temp_free(v);
854 } else {
855 if (dc->rd) {
856 gen_load(dc, cpu_R[dc->rd], *addr, size);
857 } else {
858 gen_load(dc, env_imm, *addr, size);
859 }
860 }
861
862 if (addr == &t)
863 tcg_temp_free(t);
864 }
865
866 static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
867 unsigned int size)
868 {
869 int mem_index = cpu_mmu_index(dc->env);
870
871 if (size == 1)
872 tcg_gen_qemu_st8(val, addr, mem_index);
873 else if (size == 2) {
874 tcg_gen_qemu_st16(val, addr, mem_index);
875 } else if (size == 4) {
876 tcg_gen_qemu_st32(val, addr, mem_index);
877 } else
878 cpu_abort(dc->env, "Incorrect store size %d\n", size);
879 }
880
881 static void dec_store(DisasContext *dc)
882 {
883 TCGv t, *addr;
884 unsigned int size;
885
886 size = 1 << (dc->opcode & 3);
887
888 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
889 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
890 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
891 t_gen_raise_exception(dc, EXCP_HW_EXCP);
892 return;
893 }
894
895 LOG_DIS("s%d%s\n", size, dc->type_b ? "i" : "");
896 t_sync_flags(dc);
897 /* If we get a fault on a dslot, the jmpstate better be in sync. */
898 sync_jmpstate(dc);
899 addr = compute_ldst_addr(dc, &t);
900
901 gen_store(dc, *addr, cpu_R[dc->rd], size);
902
903 /* Verify alignment if needed. */
904 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
905 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
906 /* FIXME: if the alignment is wrong, we should restore the value
907 * in memory.
908 */
909 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
910 tcg_const_tl(1), tcg_const_tl(size - 1));
911 }
912
913 if (addr == &t)
914 tcg_temp_free(t);
915 }
916
917 static inline void eval_cc(DisasContext *dc, unsigned int cc,
918 TCGv d, TCGv a, TCGv b)
919 {
920 switch (cc) {
921 case CC_EQ:
922 tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
923 break;
924 case CC_NE:
925 tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
926 break;
927 case CC_LT:
928 tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
929 break;
930 case CC_LE:
931 tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
932 break;
933 case CC_GE:
934 tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
935 break;
936 case CC_GT:
937 tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
938 break;
939 default:
940 cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
941 break;
942 }
943 }
944
945 static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
946 {
947 int l1;
948
949 l1 = gen_new_label();
950 /* Conditional jmp. */
951 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
952 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
953 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
954 gen_set_label(l1);
955 }
956
957 static void dec_bcc(DisasContext *dc)
958 {
959 unsigned int cc;
960 unsigned int dslot;
961
962 cc = EXTRACT_FIELD(dc->ir, 21, 23);
963 dslot = dc->ir & (1 << 25);
964 LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
965
966 dc->delayed_branch = 1;
967 if (dslot) {
968 dc->delayed_branch = 2;
969 dc->tb_flags |= D_FLAG;
970 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
971 cpu_env, offsetof(CPUState, bimm));
972 }
973
974 if (dec_alu_op_b_is_small_imm(dc)) {
975 int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
976
977 tcg_gen_movi_tl(env_btarget, dc->pc + offset);
978 dc->jmp = JMP_DIRECT;
979 dc->jmp_pc = dc->pc + offset;
980 } else {
981 dc->jmp = JMP_INDIRECT;
982 tcg_gen_movi_tl(env_btarget, dc->pc);
983 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
984 }
985 eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
986 }
987
988 static void dec_br(DisasContext *dc)
989 {
990 unsigned int dslot, link, abs;
991 int mem_index = cpu_mmu_index(dc->env);
992
993 dslot = dc->ir & (1 << 20);
994 abs = dc->ir & (1 << 19);
995 link = dc->ir & (1 << 18);
996 LOG_DIS("br%s%s%s%s imm=%x\n",
997 abs ? "a" : "", link ? "l" : "",
998 dc->type_b ? "i" : "", dslot ? "d" : "",
999 dc->imm);
1000
1001 dc->delayed_branch = 1;
1002 if (dslot) {
1003 dc->delayed_branch = 2;
1004 dc->tb_flags |= D_FLAG;
1005 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1006 cpu_env, offsetof(CPUState, bimm));
1007 }
1008 if (link && dc->rd)
1009 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1010
1011 dc->jmp = JMP_INDIRECT;
1012 if (abs) {
1013 tcg_gen_movi_tl(env_btaken, 1);
1014 tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1015 if (link && !dslot) {
1016 if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1017 t_gen_raise_exception(dc, EXCP_BREAK);
1018 if (dc->imm == 0) {
1019 if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
1020 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1021 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1022 return;
1023 }
1024
1025 t_gen_raise_exception(dc, EXCP_DEBUG);
1026 }
1027 }
1028 } else {
1029 if (dec_alu_op_b_is_small_imm(dc)) {
1030 dc->jmp = JMP_DIRECT;
1031 dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1032 tcg_gen_movi_tl(env_btaken, 1);
1033 } else {
1034 tcg_gen_movi_tl(env_btaken, 1);
1035 tcg_gen_movi_tl(env_btarget, dc->pc);
1036 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1037 }
1038 }
1039 }
1040
1041 static inline void do_rti(DisasContext *dc)
1042 {
1043 TCGv t0, t1;
1044 t0 = tcg_temp_new();
1045 t1 = tcg_temp_new();
1046 tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1047 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1048 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1049
1050 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1051 tcg_gen_or_tl(t1, t1, t0);
1052 msr_write(dc, t1);
1053 tcg_temp_free(t1);
1054 tcg_temp_free(t0);
1055 dc->tb_flags &= ~DRTI_FLAG;
1056 }
1057
1058 static inline void do_rtb(DisasContext *dc)
1059 {
1060 TCGv t0, t1;
1061 t0 = tcg_temp_new();
1062 t1 = tcg_temp_new();
1063 tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1064 tcg_gen_shri_tl(t0, t1, 1);
1065 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1066
1067 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1068 tcg_gen_or_tl(t1, t1, t0);
1069 msr_write(dc, t1);
1070 tcg_temp_free(t1);
1071 tcg_temp_free(t0);
1072 dc->tb_flags &= ~DRTB_FLAG;
1073 }
1074
1075 static inline void do_rte(DisasContext *dc)
1076 {
1077 TCGv t0, t1;
1078 t0 = tcg_temp_new();
1079 t1 = tcg_temp_new();
1080
1081 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1082 tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1083 tcg_gen_shri_tl(t0, t1, 1);
1084 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1085
1086 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1087 tcg_gen_or_tl(t1, t1, t0);
1088 msr_write(dc, t1);
1089 tcg_temp_free(t1);
1090 tcg_temp_free(t0);
1091 dc->tb_flags &= ~DRTE_FLAG;
1092 }
1093
1094 static void dec_rts(DisasContext *dc)
1095 {
1096 unsigned int b_bit, i_bit, e_bit;
1097 int mem_index = cpu_mmu_index(dc->env);
1098
1099 i_bit = dc->ir & (1 << 21);
1100 b_bit = dc->ir & (1 << 22);
1101 e_bit = dc->ir & (1 << 23);
1102
1103 dc->delayed_branch = 2;
1104 dc->tb_flags |= D_FLAG;
1105 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1106 cpu_env, offsetof(CPUState, bimm));
1107
1108 if (i_bit) {
1109 LOG_DIS("rtid ir=%x\n", dc->ir);
1110 if ((dc->tb_flags & MSR_EE_FLAG)
1111 && mem_index == MMU_USER_IDX) {
1112 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1113 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1114 }
1115 dc->tb_flags |= DRTI_FLAG;
1116 } else if (b_bit) {
1117 LOG_DIS("rtbd ir=%x\n", dc->ir);
1118 if ((dc->tb_flags & MSR_EE_FLAG)
1119 && mem_index == MMU_USER_IDX) {
1120 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1121 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1122 }
1123 dc->tb_flags |= DRTB_FLAG;
1124 } else if (e_bit) {
1125 LOG_DIS("rted ir=%x\n", dc->ir);
1126 if ((dc->tb_flags & MSR_EE_FLAG)
1127 && mem_index == MMU_USER_IDX) {
1128 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1129 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1130 }
1131 dc->tb_flags |= DRTE_FLAG;
1132 } else
1133 LOG_DIS("rts ir=%x\n", dc->ir);
1134
1135 dc->jmp = JMP_INDIRECT;
1136 tcg_gen_movi_tl(env_btaken, 1);
1137 tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1138 }
1139
1140 static int dec_check_fpuv2(DisasContext *dc)
1141 {
1142 int r;
1143
1144 r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1145
1146 if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1147 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1148 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1149 }
1150 return r;
1151 }
1152
1153 static void dec_fpu(DisasContext *dc)
1154 {
1155 unsigned int fpu_insn;
1156
1157 if ((dc->tb_flags & MSR_EE_FLAG)
1158 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1159 && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1160 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1161 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1162 return;
1163 }
1164
1165 fpu_insn = (dc->ir >> 7) & 7;
1166
1167 switch (fpu_insn) {
1168 case 0:
1169 gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1170 break;
1171
1172 case 1:
1173 gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1174 break;
1175
1176 case 2:
1177 gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1178 break;
1179
1180 case 3:
1181 gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1182 break;
1183
1184 case 4:
1185 switch ((dc->ir >> 4) & 7) {
1186 case 0:
1187 gen_helper_fcmp_un(cpu_R[dc->rd],
1188 cpu_R[dc->ra], cpu_R[dc->rb]);
1189 break;
1190 case 1:
1191 gen_helper_fcmp_lt(cpu_R[dc->rd],
1192 cpu_R[dc->ra], cpu_R[dc->rb]);
1193 break;
1194 case 2:
1195 gen_helper_fcmp_eq(cpu_R[dc->rd],
1196 cpu_R[dc->ra], cpu_R[dc->rb]);
1197 break;
1198 case 3:
1199 gen_helper_fcmp_le(cpu_R[dc->rd],
1200 cpu_R[dc->ra], cpu_R[dc->rb]);
1201 break;
1202 case 4:
1203 gen_helper_fcmp_gt(cpu_R[dc->rd],
1204 cpu_R[dc->ra], cpu_R[dc->rb]);
1205 break;
1206 case 5:
1207 gen_helper_fcmp_ne(cpu_R[dc->rd],
1208 cpu_R[dc->ra], cpu_R[dc->rb]);
1209 break;
1210 case 6:
1211 gen_helper_fcmp_ge(cpu_R[dc->rd],
1212 cpu_R[dc->ra], cpu_R[dc->rb]);
1213 break;
1214 default:
1215 qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
1216 fpu_insn, dc->pc, dc->opcode);
1217 dc->abort_at_next_insn = 1;
1218 break;
1219 }
1220 break;
1221
1222 case 5:
1223 if (!dec_check_fpuv2(dc)) {
1224 return;
1225 }
1226 gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]);
1227 break;
1228
1229 case 6:
1230 if (!dec_check_fpuv2(dc)) {
1231 return;
1232 }
1233 gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]);
1234 break;
1235
1236 case 7:
1237 if (!dec_check_fpuv2(dc)) {
1238 return;
1239 }
1240 gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]);
1241 break;
1242
1243 default:
1244 qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
1245 fpu_insn, dc->pc, dc->opcode);
1246 dc->abort_at_next_insn = 1;
1247 break;
1248 }
1249 }
1250
1251 static void dec_null(DisasContext *dc)
1252 {
1253 if ((dc->tb_flags & MSR_EE_FLAG)
1254 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1255 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1256 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1257 return;
1258 }
1259 qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1260 dc->abort_at_next_insn = 1;
1261 }
1262
1263 static struct decoder_info {
1264 struct {
1265 uint32_t bits;
1266 uint32_t mask;
1267 };
1268 void (*dec)(DisasContext *dc);
1269 } decinfo[] = {
1270 {DEC_ADD, dec_add},
1271 {DEC_SUB, dec_sub},
1272 {DEC_AND, dec_and},
1273 {DEC_XOR, dec_xor},
1274 {DEC_OR, dec_or},
1275 {DEC_BIT, dec_bit},
1276 {DEC_BARREL, dec_barrel},
1277 {DEC_LD, dec_load},
1278 {DEC_ST, dec_store},
1279 {DEC_IMM, dec_imm},
1280 {DEC_BR, dec_br},
1281 {DEC_BCC, dec_bcc},
1282 {DEC_RTS, dec_rts},
1283 {DEC_FPU, dec_fpu},
1284 {DEC_MUL, dec_mul},
1285 {DEC_DIV, dec_div},
1286 {DEC_MSR, dec_msr},
1287 {{0, 0}, dec_null}
1288 };
1289
1290 static inline void decode(DisasContext *dc)
1291 {
1292 uint32_t ir;
1293 int i;
1294
1295 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
1296 tcg_gen_debug_insn_start(dc->pc);
1297
1298 dc->ir = ir = ldl_code(dc->pc);
1299 LOG_DIS("%8.8x\t", dc->ir);
1300
1301 if (dc->ir)
1302 dc->nr_nops = 0;
1303 else {
1304 if ((dc->tb_flags & MSR_EE_FLAG)
1305 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1306 && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1307 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1308 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1309 return;
1310 }
1311
1312 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1313 dc->nr_nops++;
1314 if (dc->nr_nops > 4)
1315 cpu_abort(dc->env, "fetching nop sequence\n");
1316 }
1317 /* bit 2 seems to indicate insn type. */
1318 dc->type_b = ir & (1 << 29);
1319
1320 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1321 dc->rd = EXTRACT_FIELD(ir, 21, 25);
1322 dc->ra = EXTRACT_FIELD(ir, 16, 20);
1323 dc->rb = EXTRACT_FIELD(ir, 11, 15);
1324 dc->imm = EXTRACT_FIELD(ir, 0, 15);
1325
1326 /* Large switch for all insns. */
1327 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1328 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1329 decinfo[i].dec(dc);
1330 break;
1331 }
1332 }
1333 }
1334
1335 static void check_breakpoint(CPUState *env, DisasContext *dc)
1336 {
1337 CPUBreakpoint *bp;
1338
1339 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1340 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1341 if (bp->pc == dc->pc) {
1342 t_gen_raise_exception(dc, EXCP_DEBUG);
1343 dc->is_jmp = DISAS_UPDATE;
1344 }
1345 }
1346 }
1347 }
1348
1349 /* generate intermediate code for basic block 'tb'. */
1350 static void
1351 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
1352 int search_pc)
1353 {
1354 uint16_t *gen_opc_end;
1355 uint32_t pc_start;
1356 int j, lj;
1357 struct DisasContext ctx;
1358 struct DisasContext *dc = &ctx;
1359 uint32_t next_page_start, org_flags;
1360 target_ulong npc;
1361 int num_insns;
1362 int max_insns;
1363
1364 qemu_log_try_set_file(stderr);
1365
1366 pc_start = tb->pc;
1367 dc->env = env;
1368 dc->tb = tb;
1369 org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1370
1371 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
1372
1373 dc->is_jmp = DISAS_NEXT;
1374 dc->jmp = 0;
1375 dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1376 if (dc->delayed_branch) {
1377 dc->jmp = JMP_INDIRECT;
1378 }
1379 dc->pc = pc_start;
1380 dc->singlestep_enabled = env->singlestep_enabled;
1381 dc->cpustate_changed = 0;
1382 dc->abort_at_next_insn = 0;
1383 dc->nr_nops = 0;
1384
1385 if (pc_start & 3)
1386 cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1387
1388 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1389 #if !SIM_COMPAT
1390 qemu_log("--------------\n");
1391 log_cpu_state(env, 0);
1392 #endif
1393 }
1394
1395 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1396 lj = -1;
1397 num_insns = 0;
1398 max_insns = tb->cflags & CF_COUNT_MASK;
1399 if (max_insns == 0)
1400 max_insns = CF_COUNT_MASK;
1401
1402 gen_icount_start();
1403 do
1404 {
1405 #if SIM_COMPAT
1406 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1407 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1408 gen_helper_debug();
1409 }
1410 #endif
1411 check_breakpoint(env, dc);
1412
1413 if (search_pc) {
1414 j = gen_opc_ptr - gen_opc_buf;
1415 if (lj < j) {
1416 lj++;
1417 while (lj < j)
1418 gen_opc_instr_start[lj++] = 0;
1419 }
1420 gen_opc_pc[lj] = dc->pc;
1421 gen_opc_instr_start[lj] = 1;
1422 gen_opc_icount[lj] = num_insns;
1423 }
1424
1425 /* Pretty disas. */
1426 LOG_DIS("%8.8x:\t", dc->pc);
1427
1428 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1429 gen_io_start();
1430
1431 dc->clear_imm = 1;
1432 decode(dc);
1433 if (dc->clear_imm)
1434 dc->tb_flags &= ~IMM_FLAG;
1435 dc->pc += 4;
1436 num_insns++;
1437
1438 if (dc->delayed_branch) {
1439 dc->delayed_branch--;
1440 if (!dc->delayed_branch) {
1441 if (dc->tb_flags & DRTI_FLAG)
1442 do_rti(dc);
1443 if (dc->tb_flags & DRTB_FLAG)
1444 do_rtb(dc);
1445 if (dc->tb_flags & DRTE_FLAG)
1446 do_rte(dc);
1447 /* Clear the delay slot flag. */
1448 dc->tb_flags &= ~D_FLAG;
1449 /* If it is a direct jump, try direct chaining. */
1450 if (dc->jmp == JMP_INDIRECT) {
1451 eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1452 dc->is_jmp = DISAS_JUMP;
1453 } else if (dc->jmp == JMP_DIRECT) {
1454 int l1;
1455
1456 t_sync_flags(dc);
1457 l1 = gen_new_label();
1458 /* Conditional jmp. */
1459 tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1460 gen_goto_tb(dc, 1, dc->pc);
1461 gen_set_label(l1);
1462 gen_goto_tb(dc, 0, dc->jmp_pc);
1463
1464 dc->is_jmp = DISAS_TB_JUMP;
1465 }
1466 break;
1467 }
1468 }
1469 if (env->singlestep_enabled)
1470 break;
1471 } while (!dc->is_jmp && !dc->cpustate_changed
1472 && gen_opc_ptr < gen_opc_end
1473 && !singlestep
1474 && (dc->pc < next_page_start)
1475 && num_insns < max_insns);
1476
1477 npc = dc->pc;
1478 if (dc->jmp == JMP_DIRECT) {
1479 if (dc->tb_flags & D_FLAG) {
1480 dc->is_jmp = DISAS_UPDATE;
1481 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1482 sync_jmpstate(dc);
1483 } else
1484 npc = dc->jmp_pc;
1485 }
1486
1487 if (tb->cflags & CF_LAST_IO)
1488 gen_io_end();
1489 /* Force an update if the per-tb cpu state has changed. */
1490 if (dc->is_jmp == DISAS_NEXT
1491 && (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1492 dc->is_jmp = DISAS_UPDATE;
1493 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1494 }
1495 t_sync_flags(dc);
1496
1497 if (unlikely(env->singlestep_enabled)) {
1498 t_gen_raise_exception(dc, EXCP_DEBUG);
1499 if (dc->is_jmp == DISAS_NEXT)
1500 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1501 } else {
1502 switch(dc->is_jmp) {
1503 case DISAS_NEXT:
1504 gen_goto_tb(dc, 1, npc);
1505 break;
1506 default:
1507 case DISAS_JUMP:
1508 case DISAS_UPDATE:
1509 /* indicate that the hash table must be used
1510 to find the next TB */
1511 tcg_gen_exit_tb(0);
1512 break;
1513 case DISAS_TB_JUMP:
1514 /* nothing more to generate */
1515 break;
1516 }
1517 }
1518 gen_icount_end(tb, num_insns);
1519 *gen_opc_ptr = INDEX_op_end;
1520 if (search_pc) {
1521 j = gen_opc_ptr - gen_opc_buf;
1522 lj++;
1523 while (lj <= j)
1524 gen_opc_instr_start[lj++] = 0;
1525 } else {
1526 tb->size = dc->pc - pc_start;
1527 tb->icount = num_insns;
1528 }
1529
1530 #ifdef DEBUG_DISAS
1531 #if !SIM_COMPAT
1532 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1533 qemu_log("\n");
1534 #if DISAS_GNU
1535 log_target_disas(pc_start, dc->pc - pc_start, 0);
1536 #endif
1537 qemu_log("\nisize=%d osize=%td\n",
1538 dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
1539 }
1540 #endif
1541 #endif
1542 assert(!dc->abort_at_next_insn);
1543 }
1544
1545 void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
1546 {
1547 gen_intermediate_code_internal(env, tb, 0);
1548 }
1549
1550 void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
1551 {
1552 gen_intermediate_code_internal(env, tb, 1);
1553 }
1554
1555 void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
1556 int flags)
1557 {
1558 int i;
1559
1560 if (!env || !f)
1561 return;
1562
1563 cpu_fprintf(f, "IN: PC=%x %s\n",
1564 env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1565 cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1566 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1567 env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1568 cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1569 env->btaken, env->btarget,
1570 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1571 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1572 (env->sregs[SR_MSR] & MSR_EIP),
1573 (env->sregs[SR_MSR] & MSR_IE));
1574
1575 for (i = 0; i < 32; i++) {
1576 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1577 if ((i + 1) % 4 == 0)
1578 cpu_fprintf(f, "\n");
1579 }
1580 cpu_fprintf(f, "\n\n");
1581 }
1582
1583 CPUState *cpu_mb_init (const char *cpu_model)
1584 {
1585 CPUState *env;
1586 static int tcg_initialized = 0;
1587 int i;
1588
1589 env = qemu_mallocz(sizeof(CPUState));
1590
1591 cpu_exec_init(env);
1592 cpu_reset(env);
1593 set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
1594
1595 if (tcg_initialized)
1596 return env;
1597
1598 tcg_initialized = 1;
1599
1600 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1601
1602 env_debug = tcg_global_mem_new(TCG_AREG0,
1603 offsetof(CPUState, debug),
1604 "debug0");
1605 env_iflags = tcg_global_mem_new(TCG_AREG0,
1606 offsetof(CPUState, iflags),
1607 "iflags");
1608 env_imm = tcg_global_mem_new(TCG_AREG0,
1609 offsetof(CPUState, imm),
1610 "imm");
1611 env_btarget = tcg_global_mem_new(TCG_AREG0,
1612 offsetof(CPUState, btarget),
1613 "btarget");
1614 env_btaken = tcg_global_mem_new(TCG_AREG0,
1615 offsetof(CPUState, btaken),
1616 "btaken");
1617 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1618 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1619 offsetof(CPUState, regs[i]),
1620 regnames[i]);
1621 }
1622 for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
1623 cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
1624 offsetof(CPUState, sregs[i]),
1625 special_regnames[i]);
1626 }
1627 #define GEN_HELPER 2
1628 #include "helper.h"
1629
1630 return env;
1631 }
1632
1633 void cpu_reset (CPUState *env)
1634 {
1635 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
1636 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
1637 log_cpu_state(env, 0);
1638 }
1639
1640 memset(env, 0, offsetof(CPUMBState, breakpoints));
1641 tlb_flush(env, 1);
1642
1643 env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
1644 | PVR0_USE_BARREL_MASK \
1645 | PVR0_USE_DIV_MASK \
1646 | PVR0_USE_HW_MUL_MASK \
1647 | PVR0_USE_EXC_MASK \
1648 | PVR0_USE_ICACHE_MASK \
1649 | PVR0_USE_DCACHE_MASK \
1650 | PVR0_USE_MMU \
1651 | (0xb << 8);
1652 env->pvr.regs[2] = PVR2_D_OPB_MASK \
1653 | PVR2_D_LMB_MASK \
1654 | PVR2_I_OPB_MASK \
1655 | PVR2_I_LMB_MASK \
1656 | PVR2_USE_MSR_INSTR \
1657 | PVR2_USE_PCMP_INSTR \
1658 | PVR2_USE_BARREL_MASK \
1659 | PVR2_USE_DIV_MASK \
1660 | PVR2_USE_HW_MUL_MASK \
1661 | PVR2_USE_MUL64_MASK \
1662 | PVR2_USE_FPU_MASK \
1663 | PVR2_USE_FPU2_MASK \
1664 | PVR2_FPU_EXC_MASK \
1665 | 0;
1666 env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */
1667 env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
1668
1669 #if defined(CONFIG_USER_ONLY)
1670 /* start in user mode with interrupts enabled. */
1671 env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
1672 env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */
1673 #else
1674 env->sregs[SR_MSR] = 0;
1675 mmu_init(&env->mmu);
1676 env->mmu.c_mmu = 3;
1677 env->mmu.c_mmu_tlb_access = 3;
1678 env->mmu.c_mmu_zones = 16;
1679 #endif
1680 }
1681
1682 void gen_pc_load(CPUState *env, struct TranslationBlock *tb,
1683 unsigned long searched_pc, int pc_pos, void *puc)
1684 {
1685 env->sregs[SR_PC] = gen_opc_pc[pc_pos];
1686 }
QEmu