2 * Xilinx MicroBlaze emulation for qemu: main translation routines.
4 * Copyright (c) 2009 Edgar E. Iglesias.
5 * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 #include "disas/disas.h"
25 #include "microblaze-decode.h"
33 #if DISAS_MB && !SIM_COMPAT
34 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
36 # define LOG_DIS(...) do { } while (0)
41 #define EXTRACT_FIELD(src, start, end) \
42 (((src) >> start) & ((1 << (end - start + 1)) - 1))
44 static TCGv env_debug;
45 static TCGv_ptr cpu_env;
46 static TCGv cpu_R[32];
47 static TCGv cpu_SR[18];
49 static TCGv env_btaken;
50 static TCGv env_btarget;
51 static TCGv env_iflags;
53 #include "exec/gen-icount.h"
55 /* This is the state at translation time. */
56 typedef struct DisasContext {
67 unsigned int cpustate_changed;
68 unsigned int delayed_branch;
69 unsigned int tb_flags, synced_flags; /* tb dependent flags. */
70 unsigned int clear_imm;
75 #define JMP_DIRECT_CC 2
76 #define JMP_INDIRECT 3
80 int abort_at_next_insn;
82 struct TranslationBlock *tb;
83 int singlestep_enabled;
86 static const char *regnames[] =
88 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
89 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
90 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
91 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
94 static const char *special_regnames[] =
96 "rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7",
97 "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
98 "sr16", "sr17", "sr18"
101 /* Sign extend at translation time. */
102 static inline int sign_extend(unsigned int val, unsigned int width)
114 static inline void t_sync_flags(DisasContext *dc)
116 /* Synch the tb dependent flags between translator and runtime. */
117 if (dc->tb_flags != dc->synced_flags) {
118 tcg_gen_movi_tl(env_iflags, dc->tb_flags);
119 dc->synced_flags = dc->tb_flags;
123 static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
125 TCGv_i32 tmp = tcg_const_i32(index);
128 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
129 gen_helper_raise_exception(cpu_env, tmp);
130 tcg_temp_free_i32(tmp);
131 dc->is_jmp = DISAS_UPDATE;
134 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
136 TranslationBlock *tb;
138 if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
140 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
141 tcg_gen_exit_tb((tcg_target_long)tb + n);
143 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
148 static void read_carry(DisasContext *dc, TCGv d)
150 tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
153 static void write_carry(DisasContext *dc, TCGv v)
155 TCGv t0 = tcg_temp_new();
156 tcg_gen_shli_tl(t0, v, 31);
157 tcg_gen_sari_tl(t0, t0, 31);
158 tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC));
159 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
161 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
165 static void write_carryi(DisasContext *dc, int carry)
167 TCGv t0 = tcg_temp_new();
168 tcg_gen_movi_tl(t0, carry ? 1 : 0);
173 /* True if ALU operand b is a small immediate that may deserve
175 static inline int dec_alu_op_b_is_small_imm(DisasContext *dc)
177 /* Immediate insn without the imm prefix ? */
178 return dc->type_b && !(dc->tb_flags & IMM_FLAG);
181 static inline TCGv *dec_alu_op_b(DisasContext *dc)
184 if (dc->tb_flags & IMM_FLAG)
185 tcg_gen_ori_tl(env_imm, env_imm, dc->imm);
187 tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm));
190 return &cpu_R[dc->rb];
193 static void dec_add(DisasContext *dc)
201 LOG_DIS("add%s%s%s r%d r%d r%d\n",
202 dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "",
203 dc->rd, dc->ra, dc->rb);
205 /* Take care of the easy cases first. */
207 /* k - keep carry, no need to update MSR. */
208 /* If rd == r0, it's a nop. */
210 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
213 /* c - Add carry into the result. */
217 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
224 /* From now on, we can assume k is zero. So we need to update MSR. */
230 tcg_gen_movi_tl(cf, 0);
234 TCGv ncf = tcg_temp_new();
235 gen_helper_carry(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
236 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
237 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
238 write_carry(dc, ncf);
241 gen_helper_carry(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
247 static void dec_sub(DisasContext *dc)
249 unsigned int u, cmp, k, c;
255 cmp = (dc->imm & 1) && (!dc->type_b) && k;
258 LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir);
261 gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
263 gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
268 LOG_DIS("sub%s%s r%d, r%d r%d\n",
269 k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb);
271 /* Take care of the easy cases first. */
273 /* k - keep carry, no need to update MSR. */
274 /* If rd == r0, it's a nop. */
276 tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
279 /* c - Add carry into the result. */
283 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
290 /* From now on, we can assume k is zero. So we need to update MSR. */
291 /* Extract carry. And complement a into na. */
297 tcg_gen_movi_tl(cf, 1);
300 /* d = b + ~a + c. carry defaults to 1. */
301 tcg_gen_not_tl(na, cpu_R[dc->ra]);
304 TCGv ncf = tcg_temp_new();
305 gen_helper_carry(ncf, na, *(dec_alu_op_b(dc)), cf);
306 tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc)));
307 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
308 write_carry(dc, ncf);
311 gen_helper_carry(cf, na, *(dec_alu_op_b(dc)), cf);
318 static void dec_pattern(DisasContext *dc)
323 if ((dc->tb_flags & MSR_EE_FLAG)
324 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
325 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
326 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
327 t_gen_raise_exception(dc, EXCP_HW_EXCP);
330 mode = dc->opcode & 3;
334 LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
336 gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
339 LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
341 TCGv t0 = tcg_temp_local_new();
342 l1 = gen_new_label();
343 tcg_gen_movi_tl(t0, 1);
344 tcg_gen_brcond_tl(TCG_COND_EQ,
345 cpu_R[dc->ra], cpu_R[dc->rb], l1);
346 tcg_gen_movi_tl(t0, 0);
348 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
353 LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
354 l1 = gen_new_label();
356 TCGv t0 = tcg_temp_local_new();
357 tcg_gen_movi_tl(t0, 1);
358 tcg_gen_brcond_tl(TCG_COND_NE,
359 cpu_R[dc->ra], cpu_R[dc->rb], l1);
360 tcg_gen_movi_tl(t0, 0);
362 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
368 "unsupported pattern insn opcode=%x\n", dc->opcode);
373 static void dec_and(DisasContext *dc)
377 if (!dc->type_b && (dc->imm & (1 << 10))) {
382 not = dc->opcode & (1 << 1);
383 LOG_DIS("and%s\n", not ? "n" : "");
389 TCGv t = tcg_temp_new();
390 tcg_gen_not_tl(t, *(dec_alu_op_b(dc)));
391 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t);
394 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
397 static void dec_or(DisasContext *dc)
399 if (!dc->type_b && (dc->imm & (1 << 10))) {
404 LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
406 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
409 static void dec_xor(DisasContext *dc)
411 if (!dc->type_b && (dc->imm & (1 << 10))) {
416 LOG_DIS("xor r%d\n", dc->rd);
418 tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
421 static inline void msr_read(DisasContext *dc, TCGv d)
423 tcg_gen_mov_tl(d, cpu_SR[SR_MSR]);
426 static inline void msr_write(DisasContext *dc, TCGv v)
431 dc->cpustate_changed = 1;
432 /* PVR bit is not writable. */
433 tcg_gen_andi_tl(t, v, ~MSR_PVR);
434 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
435 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v);
439 static void dec_msr(DisasContext *dc)
442 unsigned int sr, to, rn;
443 int mem_index = cpu_mmu_index(dc->env);
445 sr = dc->imm & ((1 << 14) - 1);
446 to = dc->imm & (1 << 14);
449 dc->cpustate_changed = 1;
451 /* msrclr and msrset. */
452 if (!(dc->imm & (1 << 15))) {
453 unsigned int clr = dc->ir & (1 << 16);
455 LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set",
458 if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) {
463 if ((dc->tb_flags & MSR_EE_FLAG)
464 && mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) {
465 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
466 t_gen_raise_exception(dc, EXCP_HW_EXCP);
471 msr_read(dc, cpu_R[dc->rd]);
476 tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc)));
479 tcg_gen_not_tl(t1, t1);
480 tcg_gen_and_tl(t0, t0, t1);
482 tcg_gen_or_tl(t0, t0, t1);
486 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
487 dc->is_jmp = DISAS_UPDATE;
492 if ((dc->tb_flags & MSR_EE_FLAG)
493 && mem_index == MMU_USER_IDX) {
494 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
495 t_gen_raise_exception(dc, EXCP_HW_EXCP);
500 #if !defined(CONFIG_USER_ONLY)
501 /* Catch read/writes to the mmu block. */
502 if ((sr & ~0xff) == 0x1000) {
504 LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
506 gen_helper_mmu_write(cpu_env, tcg_const_tl(sr), cpu_R[dc->ra]);
508 gen_helper_mmu_read(cpu_R[dc->rd], cpu_env, tcg_const_tl(sr));
514 LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
519 msr_write(dc, cpu_R[dc->ra]);
522 tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]);
525 tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]);
528 tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
531 tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUMBState, slr));
534 tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUMBState, shr));
537 cpu_abort(dc->env, "unknown mts reg %x\n", sr);
541 LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm);
545 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
548 msr_read(dc, cpu_R[dc->rd]);
551 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]);
554 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]);
557 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]);
560 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]);
563 tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUMBState, slr));
566 tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUMBState, shr));
582 tcg_gen_ld_tl(cpu_R[dc->rd],
583 cpu_env, offsetof(CPUMBState, pvr.regs[rn]));
586 cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
592 tcg_gen_movi_tl(cpu_R[0], 0);
596 /* 64-bit signed mul, lower result in d and upper in d2. */
597 static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
601 t0 = tcg_temp_new_i64();
602 t1 = tcg_temp_new_i64();
604 tcg_gen_ext_i32_i64(t0, a);
605 tcg_gen_ext_i32_i64(t1, b);
606 tcg_gen_mul_i64(t0, t0, t1);
608 tcg_gen_trunc_i64_i32(d, t0);
609 tcg_gen_shri_i64(t0, t0, 32);
610 tcg_gen_trunc_i64_i32(d2, t0);
612 tcg_temp_free_i64(t0);
613 tcg_temp_free_i64(t1);
616 /* 64-bit unsigned muls, lower result in d and upper in d2. */
617 static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
621 t0 = tcg_temp_new_i64();
622 t1 = tcg_temp_new_i64();
624 tcg_gen_extu_i32_i64(t0, a);
625 tcg_gen_extu_i32_i64(t1, b);
626 tcg_gen_mul_i64(t0, t0, t1);
628 tcg_gen_trunc_i64_i32(d, t0);
629 tcg_gen_shri_i64(t0, t0, 32);
630 tcg_gen_trunc_i64_i32(d2, t0);
632 tcg_temp_free_i64(t0);
633 tcg_temp_free_i64(t1);
636 /* Multiplier unit. */
637 static void dec_mul(DisasContext *dc)
640 unsigned int subcode;
642 if ((dc->tb_flags & MSR_EE_FLAG)
643 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
644 && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
645 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
646 t_gen_raise_exception(dc, EXCP_HW_EXCP);
650 subcode = dc->imm & 3;
651 d[0] = tcg_temp_new();
652 d[1] = tcg_temp_new();
655 LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
656 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
660 /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
661 if (subcode >= 1 && subcode <= 3
662 && !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
668 LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
669 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
672 LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
673 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
676 LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
677 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
680 LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
681 t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
684 cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
693 static void dec_div(DisasContext *dc)
700 if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
701 && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
702 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
703 t_gen_raise_exception(dc, EXCP_HW_EXCP);
707 gen_helper_divu(cpu_R[dc->rd], cpu_env, *(dec_alu_op_b(dc)),
710 gen_helper_divs(cpu_R[dc->rd], cpu_env, *(dec_alu_op_b(dc)),
713 tcg_gen_movi_tl(cpu_R[dc->rd], 0);
716 static void dec_barrel(DisasContext *dc)
721 if ((dc->tb_flags & MSR_EE_FLAG)
722 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
723 && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
724 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
725 t_gen_raise_exception(dc, EXCP_HW_EXCP);
729 s = dc->imm & (1 << 10);
730 t = dc->imm & (1 << 9);
732 LOG_DIS("bs%s%s r%d r%d r%d\n",
733 s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
737 tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
738 tcg_gen_andi_tl(t0, t0, 31);
741 tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
744 tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
746 tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
750 static void dec_bit(DisasContext *dc)
754 int mem_index = cpu_mmu_index(dc->env);
756 op = dc->ir & ((1 << 9) - 1);
762 LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
763 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
767 tcg_gen_shli_tl(t1, t1, 31);
769 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
770 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
783 LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
786 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
791 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
793 tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
797 LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
798 tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
801 LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
802 tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
809 LOG_DIS("wdc r%d\n", dc->ra);
810 if ((dc->tb_flags & MSR_EE_FLAG)
811 && mem_index == MMU_USER_IDX) {
812 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
813 t_gen_raise_exception(dc, EXCP_HW_EXCP);
819 LOG_DIS("wic r%d\n", dc->ra);
820 if ((dc->tb_flags & MSR_EE_FLAG)
821 && mem_index == MMU_USER_IDX) {
822 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
823 t_gen_raise_exception(dc, EXCP_HW_EXCP);
828 if ((dc->tb_flags & MSR_EE_FLAG)
829 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
830 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
831 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
832 t_gen_raise_exception(dc, EXCP_HW_EXCP);
834 if (dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR) {
835 gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]);
840 LOG_DIS("swapb r%d r%d\n", dc->rd, dc->ra);
841 tcg_gen_bswap32_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
845 LOG_DIS("swaph r%d r%d\n", dc->rd, dc->ra);
846 tcg_gen_rotri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 16);
849 cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
850 dc->pc, op, dc->rd, dc->ra, dc->rb);
855 static inline void sync_jmpstate(DisasContext *dc)
857 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
858 if (dc->jmp == JMP_DIRECT) {
859 tcg_gen_movi_tl(env_btaken, 1);
861 dc->jmp = JMP_INDIRECT;
862 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
866 static void dec_imm(DisasContext *dc)
868 LOG_DIS("imm %x\n", dc->imm << 16);
869 tcg_gen_movi_tl(env_imm, (dc->imm << 16));
870 dc->tb_flags |= IMM_FLAG;
874 static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
877 int mem_index = cpu_mmu_index(dc->env);
880 tcg_gen_qemu_ld8u(dst, addr, mem_index);
881 } else if (size == 2) {
882 tcg_gen_qemu_ld16u(dst, addr, mem_index);
883 } else if (size == 4) {
884 tcg_gen_qemu_ld32u(dst, addr, mem_index);
886 cpu_abort(dc->env, "Incorrect load size %d\n", size);
889 static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
891 unsigned int extimm = dc->tb_flags & IMM_FLAG;
892 /* Should be set to one if r1 is used by loadstores. */
895 /* All load/stores use ra. */
900 /* Treat the common cases first. */
902 /* If any of the regs is r0, return a ptr to the other. */
904 return &cpu_R[dc->rb];
905 } else if (dc->rb == 0) {
906 return &cpu_R[dc->ra];
914 tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
917 gen_helper_stackprot(cpu_env, *t);
924 return &cpu_R[dc->ra];
927 tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
928 tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
931 tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
935 gen_helper_stackprot(cpu_env, *t);
940 static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size)
943 tcg_gen_bswap32_tl(dst, src);
944 } else if (size == 2) {
945 TCGv t = tcg_temp_new();
947 /* bswap16 assumes the high bits are zero. */
948 tcg_gen_andi_tl(t, src, 0xffff);
949 tcg_gen_bswap16_tl(dst, t);
953 cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
958 static void dec_load(DisasContext *dc)
961 unsigned int size, rev = 0, ex = 0;
963 size = 1 << (dc->opcode & 3);
966 rev = (dc->ir >> 9) & 1;
967 ex = (dc->ir >> 10) & 1;
970 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
971 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
972 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
973 t_gen_raise_exception(dc, EXCP_HW_EXCP);
977 LOG_DIS("l%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
981 addr = compute_ldst_addr(dc, &t);
984 * When doing reverse accesses we need to do two things.
986 * 1. Reverse the address wrt endianness.
987 * 2. Byteswap the data lanes on the way back into the CPU core.
989 if (rev && size != 4) {
990 /* Endian reverse the address. t is addr. */
998 TCGv low = tcg_temp_new();
1000 /* Force addr into the temp. */
1003 tcg_gen_mov_tl(t, *addr);
1007 tcg_gen_andi_tl(low, t, 3);
1008 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1009 tcg_gen_andi_tl(t, t, ~3);
1010 tcg_gen_or_tl(t, t, low);
1011 tcg_gen_mov_tl(env_imm, t);
1019 /* Force addr into the temp. */
1022 tcg_gen_xori_tl(t, *addr, 2);
1025 tcg_gen_xori_tl(t, t, 2);
1029 cpu_abort(dc->env, "Invalid reverse size\n");
1034 /* lwx does not throw unaligned access errors, so force alignment */
1036 /* Force addr into the temp. */
1039 tcg_gen_mov_tl(t, *addr);
1042 tcg_gen_andi_tl(t, t, ~3);
1045 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1048 /* Verify alignment if needed. */
1049 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1050 TCGv v = tcg_temp_new();
1053 * Microblaze gives MMU faults priority over faults due to
1054 * unaligned addresses. That's why we speculatively do the load
1055 * into v. If the load succeeds, we verify alignment of the
1056 * address and if that succeeds we write into the destination reg.
1058 gen_load(dc, v, *addr, size);
1060 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1061 gen_helper_memalign(cpu_env, *addr, tcg_const_tl(dc->rd),
1062 tcg_const_tl(0), tcg_const_tl(size - 1));
1065 dec_byteswap(dc, cpu_R[dc->rd], v, size);
1067 tcg_gen_mov_tl(cpu_R[dc->rd], v);
1073 gen_load(dc, cpu_R[dc->rd], *addr, size);
1075 dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size);
1078 /* We are loading into r0, no need to reverse. */
1079 gen_load(dc, env_imm, *addr, size);
1084 /* no support for for AXI exclusive so always clear C */
1085 write_carryi(dc, 0);
1086 tcg_gen_st_tl(*addr, cpu_env, offsetof(CPUMBState, res_addr));
1093 static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
1096 int mem_index = cpu_mmu_index(dc->env);
1099 tcg_gen_qemu_st8(val, addr, mem_index);
1100 else if (size == 2) {
1101 tcg_gen_qemu_st16(val, addr, mem_index);
1102 } else if (size == 4) {
1103 tcg_gen_qemu_st32(val, addr, mem_index);
1105 cpu_abort(dc->env, "Incorrect store size %d\n", size);
1108 static void dec_store(DisasContext *dc)
1110 TCGv t, *addr, swx_addr, r_check;
1112 unsigned int size, rev = 0, ex = 0;
1114 size = 1 << (dc->opcode & 3);
1116 rev = (dc->ir >> 9) & 1;
1117 ex = (dc->ir >> 10) & 1;
1120 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
1121 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1122 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1123 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1127 LOG_DIS("s%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
1130 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1132 addr = compute_ldst_addr(dc, &t);
1134 r_check = tcg_temp_new();
1135 swx_addr = tcg_temp_local_new();
1138 /* Force addr into the swx_addr. */
1139 tcg_gen_mov_tl(swx_addr, *addr);
1141 /* swx does not throw unaligned access errors, so force alignment */
1142 tcg_gen_andi_tl(swx_addr, swx_addr, ~3);
1144 tcg_gen_ld_tl(r_check, cpu_env, offsetof(CPUMBState, res_addr));
1145 write_carryi(dc, 1);
1146 swx_skip = gen_new_label();
1147 tcg_gen_brcond_tl(TCG_COND_NE, r_check, swx_addr, swx_skip);
1148 write_carryi(dc, 0);
1151 if (rev && size != 4) {
1152 /* Endian reverse the address. t is addr. */
1160 TCGv low = tcg_temp_new();
1162 /* Force addr into the temp. */
1165 tcg_gen_mov_tl(t, *addr);
1169 tcg_gen_andi_tl(low, t, 3);
1170 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1171 tcg_gen_andi_tl(t, t, ~3);
1172 tcg_gen_or_tl(t, t, low);
1173 tcg_gen_mov_tl(env_imm, t);
1181 /* Force addr into the temp. */
1184 tcg_gen_xori_tl(t, *addr, 2);
1187 tcg_gen_xori_tl(t, t, 2);
1191 cpu_abort(dc->env, "Invalid reverse size\n");
1196 TCGv bs_data = tcg_temp_new();
1197 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1198 gen_store(dc, *addr, bs_data, size);
1199 tcg_temp_free(bs_data);
1201 gen_store(dc, *addr, cpu_R[dc->rd], size);
1205 TCGv bs_data = tcg_temp_new();
1206 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1207 gen_store(dc, *addr, bs_data, size);
1208 tcg_temp_free(bs_data);
1210 gen_store(dc, *addr, cpu_R[dc->rd], size);
1214 /* Verify alignment if needed. */
1215 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1216 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1217 /* FIXME: if the alignment is wrong, we should restore the value
1218 * in memory. One possible way to achieve this is to probe
1219 * the MMU prior to the memaccess, thay way we could put
1220 * the alignment checks in between the probe and the mem
1223 gen_helper_memalign(cpu_env, *addr, tcg_const_tl(dc->rd),
1224 tcg_const_tl(1), tcg_const_tl(size - 1));
1228 gen_set_label(swx_skip);
1230 tcg_temp_free(r_check);
1231 tcg_temp_free(swx_addr);
1237 static inline void eval_cc(DisasContext *dc, unsigned int cc,
1238 TCGv d, TCGv a, TCGv b)
1242 tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
1245 tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
1248 tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
1251 tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
1254 tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
1257 tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
1260 cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
1265 static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
1269 l1 = gen_new_label();
1270 /* Conditional jmp. */
1271 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
1272 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
1273 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
1277 static void dec_bcc(DisasContext *dc)
1282 cc = EXTRACT_FIELD(dc->ir, 21, 23);
1283 dslot = dc->ir & (1 << 25);
1284 LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
1286 dc->delayed_branch = 1;
1288 dc->delayed_branch = 2;
1289 dc->tb_flags |= D_FLAG;
1290 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1291 cpu_env, offsetof(CPUMBState, bimm));
1294 if (dec_alu_op_b_is_small_imm(dc)) {
1295 int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
1297 tcg_gen_movi_tl(env_btarget, dc->pc + offset);
1298 dc->jmp = JMP_DIRECT_CC;
1299 dc->jmp_pc = dc->pc + offset;
1301 dc->jmp = JMP_INDIRECT;
1302 tcg_gen_movi_tl(env_btarget, dc->pc);
1303 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1305 eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
1308 static void dec_br(DisasContext *dc)
1310 unsigned int dslot, link, abs, mbar;
1311 int mem_index = cpu_mmu_index(dc->env);
1313 dslot = dc->ir & (1 << 20);
1314 abs = dc->ir & (1 << 19);
1315 link = dc->ir & (1 << 18);
1317 /* Memory barrier. */
1318 mbar = (dc->ir >> 16) & 31;
1319 if (mbar == 2 && dc->imm == 4) {
1320 LOG_DIS("mbar %d\n", dc->rd);
1322 dc->cpustate_changed = 1;
1326 LOG_DIS("br%s%s%s%s imm=%x\n",
1327 abs ? "a" : "", link ? "l" : "",
1328 dc->type_b ? "i" : "", dslot ? "d" : "",
1331 dc->delayed_branch = 1;
1333 dc->delayed_branch = 2;
1334 dc->tb_flags |= D_FLAG;
1335 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1336 cpu_env, offsetof(CPUMBState, bimm));
1339 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1341 dc->jmp = JMP_INDIRECT;
1343 tcg_gen_movi_tl(env_btaken, 1);
1344 tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1345 if (link && !dslot) {
1346 if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1347 t_gen_raise_exception(dc, EXCP_BREAK);
1349 if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
1350 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1351 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1355 t_gen_raise_exception(dc, EXCP_DEBUG);
1359 if (dec_alu_op_b_is_small_imm(dc)) {
1360 dc->jmp = JMP_DIRECT;
1361 dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1363 tcg_gen_movi_tl(env_btaken, 1);
1364 tcg_gen_movi_tl(env_btarget, dc->pc);
1365 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1370 static inline void do_rti(DisasContext *dc)
1373 t0 = tcg_temp_new();
1374 t1 = tcg_temp_new();
1375 tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1376 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1377 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1379 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1380 tcg_gen_or_tl(t1, t1, t0);
1384 dc->tb_flags &= ~DRTI_FLAG;
1387 static inline void do_rtb(DisasContext *dc)
1390 t0 = tcg_temp_new();
1391 t1 = tcg_temp_new();
1392 tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1393 tcg_gen_shri_tl(t0, t1, 1);
1394 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1396 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1397 tcg_gen_or_tl(t1, t1, t0);
1401 dc->tb_flags &= ~DRTB_FLAG;
1404 static inline void do_rte(DisasContext *dc)
1407 t0 = tcg_temp_new();
1408 t1 = tcg_temp_new();
1410 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1411 tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1412 tcg_gen_shri_tl(t0, t1, 1);
1413 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1415 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1416 tcg_gen_or_tl(t1, t1, t0);
1420 dc->tb_flags &= ~DRTE_FLAG;
1423 static void dec_rts(DisasContext *dc)
1425 unsigned int b_bit, i_bit, e_bit;
1426 int mem_index = cpu_mmu_index(dc->env);
1428 i_bit = dc->ir & (1 << 21);
1429 b_bit = dc->ir & (1 << 22);
1430 e_bit = dc->ir & (1 << 23);
1432 dc->delayed_branch = 2;
1433 dc->tb_flags |= D_FLAG;
1434 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1435 cpu_env, offsetof(CPUMBState, bimm));
1438 LOG_DIS("rtid ir=%x\n", dc->ir);
1439 if ((dc->tb_flags & MSR_EE_FLAG)
1440 && mem_index == MMU_USER_IDX) {
1441 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1442 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1444 dc->tb_flags |= DRTI_FLAG;
1446 LOG_DIS("rtbd ir=%x\n", dc->ir);
1447 if ((dc->tb_flags & MSR_EE_FLAG)
1448 && mem_index == MMU_USER_IDX) {
1449 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1450 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1452 dc->tb_flags |= DRTB_FLAG;
1454 LOG_DIS("rted ir=%x\n", dc->ir);
1455 if ((dc->tb_flags & MSR_EE_FLAG)
1456 && mem_index == MMU_USER_IDX) {
1457 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1458 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1460 dc->tb_flags |= DRTE_FLAG;
1462 LOG_DIS("rts ir=%x\n", dc->ir);
1464 dc->jmp = JMP_INDIRECT;
1465 tcg_gen_movi_tl(env_btaken, 1);
1466 tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1469 static int dec_check_fpuv2(DisasContext *dc)
1473 r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1475 if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1476 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1477 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1482 static void dec_fpu(DisasContext *dc)
1484 unsigned int fpu_insn;
1486 if ((dc->tb_flags & MSR_EE_FLAG)
1487 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1488 && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1489 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1490 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1494 fpu_insn = (dc->ir >> 7) & 7;
1498 gen_helper_fadd(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
1503 gen_helper_frsub(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
1508 gen_helper_fmul(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
1513 gen_helper_fdiv(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
1518 switch ((dc->ir >> 4) & 7) {
1520 gen_helper_fcmp_un(cpu_R[dc->rd], cpu_env,
1521 cpu_R[dc->ra], cpu_R[dc->rb]);
1524 gen_helper_fcmp_lt(cpu_R[dc->rd], cpu_env,
1525 cpu_R[dc->ra], cpu_R[dc->rb]);
1528 gen_helper_fcmp_eq(cpu_R[dc->rd], cpu_env,
1529 cpu_R[dc->ra], cpu_R[dc->rb]);
1532 gen_helper_fcmp_le(cpu_R[dc->rd], cpu_env,
1533 cpu_R[dc->ra], cpu_R[dc->rb]);
1536 gen_helper_fcmp_gt(cpu_R[dc->rd], cpu_env,
1537 cpu_R[dc->ra], cpu_R[dc->rb]);
1540 gen_helper_fcmp_ne(cpu_R[dc->rd], cpu_env,
1541 cpu_R[dc->ra], cpu_R[dc->rb]);
1544 gen_helper_fcmp_ge(cpu_R[dc->rd], cpu_env,
1545 cpu_R[dc->ra], cpu_R[dc->rb]);
1548 qemu_log_mask(LOG_UNIMP,
1549 "unimplemented fcmp fpu_insn=%x pc=%x"
1551 fpu_insn, dc->pc, dc->opcode);
1552 dc->abort_at_next_insn = 1;
1558 if (!dec_check_fpuv2(dc)) {
1561 gen_helper_flt(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
1565 if (!dec_check_fpuv2(dc)) {
1568 gen_helper_fint(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
1572 if (!dec_check_fpuv2(dc)) {
1575 gen_helper_fsqrt(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
1579 qemu_log_mask(LOG_UNIMP, "unimplemented FPU insn fpu_insn=%x pc=%x"
1581 fpu_insn, dc->pc, dc->opcode);
1582 dc->abort_at_next_insn = 1;
1587 static void dec_null(DisasContext *dc)
1589 if ((dc->tb_flags & MSR_EE_FLAG)
1590 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1591 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1592 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1595 qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1596 dc->abort_at_next_insn = 1;
1599 /* Insns connected to FSL or AXI stream attached devices. */
1600 static void dec_stream(DisasContext *dc)
1602 int mem_index = cpu_mmu_index(dc->env);
1603 TCGv_i32 t_id, t_ctrl;
1606 LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put",
1607 dc->type_b ? "" : "d", dc->imm);
1609 if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
1610 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1611 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1615 t_id = tcg_temp_new();
1617 tcg_gen_movi_tl(t_id, dc->imm & 0xf);
1618 ctrl = dc->imm >> 10;
1620 tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
1621 ctrl = dc->imm >> 5;
1624 t_ctrl = tcg_const_tl(ctrl);
1627 gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
1629 gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
1631 tcg_temp_free(t_id);
1632 tcg_temp_free(t_ctrl);
1635 static struct decoder_info {
1640 void (*dec)(DisasContext *dc);
1648 {DEC_BARREL, dec_barrel},
1650 {DEC_ST, dec_store},
1659 {DEC_STREAM, dec_stream},
1663 static inline void decode(DisasContext *dc, uint32_t ir)
1667 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
1668 tcg_gen_debug_insn_start(dc->pc);
1672 LOG_DIS("%8.8x\t", dc->ir);
1677 if ((dc->tb_flags & MSR_EE_FLAG)
1678 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1679 && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1680 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1681 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1685 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1687 if (dc->nr_nops > 4)
1688 cpu_abort(dc->env, "fetching nop sequence\n");
1690 /* bit 2 seems to indicate insn type. */
1691 dc->type_b = ir & (1 << 29);
1693 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1694 dc->rd = EXTRACT_FIELD(ir, 21, 25);
1695 dc->ra = EXTRACT_FIELD(ir, 16, 20);
1696 dc->rb = EXTRACT_FIELD(ir, 11, 15);
1697 dc->imm = EXTRACT_FIELD(ir, 0, 15);
1699 /* Large switch for all insns. */
1700 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1701 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1708 static void check_breakpoint(CPUMBState *env, DisasContext *dc)
1712 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1713 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1714 if (bp->pc == dc->pc) {
1715 t_gen_raise_exception(dc, EXCP_DEBUG);
1716 dc->is_jmp = DISAS_UPDATE;
1722 /* generate intermediate code for basic block 'tb'. */
1724 gen_intermediate_code_internal(CPUMBState *env, TranslationBlock *tb,
1727 uint16_t *gen_opc_end;
1730 struct DisasContext ctx;
1731 struct DisasContext *dc = &ctx;
1732 uint32_t next_page_start, org_flags;
1737 qemu_log_try_set_file(stderr);
1742 org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1744 gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
1746 dc->is_jmp = DISAS_NEXT;
1748 dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1749 if (dc->delayed_branch) {
1750 dc->jmp = JMP_INDIRECT;
1753 dc->singlestep_enabled = env->singlestep_enabled;
1754 dc->cpustate_changed = 0;
1755 dc->abort_at_next_insn = 0;
1759 cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1761 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1763 qemu_log("--------------\n");
1764 log_cpu_state(env, 0);
1768 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1771 max_insns = tb->cflags & CF_COUNT_MASK;
1773 max_insns = CF_COUNT_MASK;
1779 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1780 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1784 check_breakpoint(env, dc);
1787 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
1791 tcg_ctx.gen_opc_instr_start[lj++] = 0;
1793 tcg_ctx.gen_opc_pc[lj] = dc->pc;
1794 tcg_ctx.gen_opc_instr_start[lj] = 1;
1795 tcg_ctx.gen_opc_icount[lj] = num_insns;
1799 LOG_DIS("%8.8x:\t", dc->pc);
1801 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1805 decode(dc, cpu_ldl_code(env, dc->pc));
1807 dc->tb_flags &= ~IMM_FLAG;
1811 if (dc->delayed_branch) {
1812 dc->delayed_branch--;
1813 if (!dc->delayed_branch) {
1814 if (dc->tb_flags & DRTI_FLAG)
1816 if (dc->tb_flags & DRTB_FLAG)
1818 if (dc->tb_flags & DRTE_FLAG)
1820 /* Clear the delay slot flag. */
1821 dc->tb_flags &= ~D_FLAG;
1822 /* If it is a direct jump, try direct chaining. */
1823 if (dc->jmp == JMP_INDIRECT) {
1824 eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1825 dc->is_jmp = DISAS_JUMP;
1826 } else if (dc->jmp == JMP_DIRECT) {
1828 gen_goto_tb(dc, 0, dc->jmp_pc);
1829 dc->is_jmp = DISAS_TB_JUMP;
1830 } else if (dc->jmp == JMP_DIRECT_CC) {
1834 l1 = gen_new_label();
1835 /* Conditional jmp. */
1836 tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1837 gen_goto_tb(dc, 1, dc->pc);
1839 gen_goto_tb(dc, 0, dc->jmp_pc);
1841 dc->is_jmp = DISAS_TB_JUMP;
1846 if (env->singlestep_enabled)
1848 } while (!dc->is_jmp && !dc->cpustate_changed
1849 && tcg_ctx.gen_opc_ptr < gen_opc_end
1851 && (dc->pc < next_page_start)
1852 && num_insns < max_insns);
1855 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1856 if (dc->tb_flags & D_FLAG) {
1857 dc->is_jmp = DISAS_UPDATE;
1858 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1864 if (tb->cflags & CF_LAST_IO)
1866 /* Force an update if the per-tb cpu state has changed. */
1867 if (dc->is_jmp == DISAS_NEXT
1868 && (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1869 dc->is_jmp = DISAS_UPDATE;
1870 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1874 if (unlikely(env->singlestep_enabled)) {
1875 TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
1877 if (dc->is_jmp != DISAS_JUMP) {
1878 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1880 gen_helper_raise_exception(cpu_env, tmp);
1881 tcg_temp_free_i32(tmp);
1883 switch(dc->is_jmp) {
1885 gen_goto_tb(dc, 1, npc);
1890 /* indicate that the hash table must be used
1891 to find the next TB */
1895 /* nothing more to generate */
1899 gen_icount_end(tb, num_insns);
1900 *tcg_ctx.gen_opc_ptr = INDEX_op_end;
1902 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
1905 tcg_ctx.gen_opc_instr_start[lj++] = 0;
1907 tb->size = dc->pc - pc_start;
1908 tb->icount = num_insns;
1913 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1916 log_target_disas(env, pc_start, dc->pc - pc_start, 0);
1918 qemu_log("\nisize=%d osize=%td\n",
1919 dc->pc - pc_start, tcg_ctx.gen_opc_ptr -
1920 tcg_ctx.gen_opc_buf);
1924 assert(!dc->abort_at_next_insn);
1927 void gen_intermediate_code (CPUMBState *env, struct TranslationBlock *tb)
1929 gen_intermediate_code_internal(env, tb, 0);
1932 void gen_intermediate_code_pc (CPUMBState *env, struct TranslationBlock *tb)
1934 gen_intermediate_code_internal(env, tb, 1);
1937 void cpu_dump_state (CPUMBState *env, FILE *f, fprintf_function cpu_fprintf,
1945 cpu_fprintf(f, "IN: PC=%x %s\n",
1946 env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1947 cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1948 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1949 env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1950 cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1951 env->btaken, env->btarget,
1952 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1953 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1954 (env->sregs[SR_MSR] & MSR_EIP),
1955 (env->sregs[SR_MSR] & MSR_IE));
1957 for (i = 0; i < 32; i++) {
1958 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1959 if ((i + 1) % 4 == 0)
1960 cpu_fprintf(f, "\n");
1962 cpu_fprintf(f, "\n\n");
1965 MicroBlazeCPU *cpu_mb_init(const char *cpu_model)
1968 static int tcg_initialized = 0;
1971 cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
1973 cpu_reset(CPU(cpu));
1974 qemu_init_vcpu(&cpu->env);
1976 if (tcg_initialized) {
1980 tcg_initialized = 1;
1982 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1984 env_debug = tcg_global_mem_new(TCG_AREG0,
1985 offsetof(CPUMBState, debug),
1987 env_iflags = tcg_global_mem_new(TCG_AREG0,
1988 offsetof(CPUMBState, iflags),
1990 env_imm = tcg_global_mem_new(TCG_AREG0,
1991 offsetof(CPUMBState, imm),
1993 env_btarget = tcg_global_mem_new(TCG_AREG0,
1994 offsetof(CPUMBState, btarget),
1996 env_btaken = tcg_global_mem_new(TCG_AREG0,
1997 offsetof(CPUMBState, btaken),
1999 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
2000 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
2001 offsetof(CPUMBState, regs[i]),
2004 for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
2005 cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
2006 offsetof(CPUMBState, sregs[i]),
2007 special_regnames[i]);
2009 #define GEN_HELPER 2
2015 void restore_state_to_opc(CPUMBState *env, TranslationBlock *tb, int pc_pos)
2017 env->sregs[SR_PC] = tcg_ctx.gen_opc_pc[pc_pos];