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/>.
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 "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(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(tcg_const_tl(sr), cpu_R[dc->ra]);
508 gen_helper_mmu_read(cpu_R[dc->rd], 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], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
709 gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
711 tcg_gen_movi_tl(cpu_R[dc->rd], 0);
714 static void dec_barrel(DisasContext *dc)
719 if ((dc->tb_flags & MSR_EE_FLAG)
720 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
721 && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
722 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
723 t_gen_raise_exception(dc, EXCP_HW_EXCP);
727 s = dc->imm & (1 << 10);
728 t = dc->imm & (1 << 9);
730 LOG_DIS("bs%s%s r%d r%d r%d\n",
731 s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
735 tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
736 tcg_gen_andi_tl(t0, t0, 31);
739 tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
742 tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
744 tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
748 static void dec_bit(DisasContext *dc)
752 int mem_index = cpu_mmu_index(dc->env);
754 op = dc->ir & ((1 << 9) - 1);
760 LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
761 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
765 tcg_gen_shli_tl(t1, t1, 31);
767 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
768 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
781 LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
784 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
789 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
791 tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
795 LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
796 tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
799 LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
800 tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
807 LOG_DIS("wdc r%d\n", dc->ra);
808 if ((dc->tb_flags & MSR_EE_FLAG)
809 && mem_index == MMU_USER_IDX) {
810 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
811 t_gen_raise_exception(dc, EXCP_HW_EXCP);
817 LOG_DIS("wic r%d\n", dc->ra);
818 if ((dc->tb_flags & MSR_EE_FLAG)
819 && mem_index == MMU_USER_IDX) {
820 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
821 t_gen_raise_exception(dc, EXCP_HW_EXCP);
826 if ((dc->tb_flags & MSR_EE_FLAG)
827 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
828 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
829 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
830 t_gen_raise_exception(dc, EXCP_HW_EXCP);
832 if (dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR) {
833 gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]);
838 LOG_DIS("swapb r%d r%d\n", dc->rd, dc->ra);
839 tcg_gen_bswap32_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
843 LOG_DIS("swaph r%d r%d\n", dc->rd, dc->ra);
844 tcg_gen_rotri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 16);
847 cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
848 dc->pc, op, dc->rd, dc->ra, dc->rb);
853 static inline void sync_jmpstate(DisasContext *dc)
855 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
856 if (dc->jmp == JMP_DIRECT) {
857 tcg_gen_movi_tl(env_btaken, 1);
859 dc->jmp = JMP_INDIRECT;
860 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
864 static void dec_imm(DisasContext *dc)
866 LOG_DIS("imm %x\n", dc->imm << 16);
867 tcg_gen_movi_tl(env_imm, (dc->imm << 16));
868 dc->tb_flags |= IMM_FLAG;
872 static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
875 int mem_index = cpu_mmu_index(dc->env);
878 tcg_gen_qemu_ld8u(dst, addr, mem_index);
879 } else if (size == 2) {
880 tcg_gen_qemu_ld16u(dst, addr, mem_index);
881 } else if (size == 4) {
882 tcg_gen_qemu_ld32u(dst, addr, mem_index);
884 cpu_abort(dc->env, "Incorrect load size %d\n", size);
887 static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
889 unsigned int extimm = dc->tb_flags & IMM_FLAG;
890 /* Should be set to one if r1 is used by loadstores. */
893 /* All load/stores use ra. */
898 /* Treat the common cases first. */
900 /* If any of the regs is r0, return a ptr to the other. */
902 return &cpu_R[dc->rb];
903 } else if (dc->rb == 0) {
904 return &cpu_R[dc->ra];
912 tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
915 gen_helper_stackprot(*t);
922 return &cpu_R[dc->ra];
925 tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
926 tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
929 tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
933 gen_helper_stackprot(*t);
938 static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size)
941 tcg_gen_bswap32_tl(dst, src);
942 } else if (size == 2) {
943 TCGv t = tcg_temp_new();
945 /* bswap16 assumes the high bits are zero. */
946 tcg_gen_andi_tl(t, src, 0xffff);
947 tcg_gen_bswap16_tl(dst, t);
951 cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
956 static void dec_load(DisasContext *dc)
959 unsigned int size, rev = 0, ex = 0;
961 size = 1 << (dc->opcode & 3);
964 rev = (dc->ir >> 9) & 1;
965 ex = (dc->ir >> 10) & 1;
968 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
969 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
970 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
971 t_gen_raise_exception(dc, EXCP_HW_EXCP);
975 LOG_DIS("l%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
979 addr = compute_ldst_addr(dc, &t);
982 * When doing reverse accesses we need to do two things.
984 * 1. Reverse the address wrt endianness.
985 * 2. Byteswap the data lanes on the way back into the CPU core.
987 if (rev && size != 4) {
988 /* Endian reverse the address. t is addr. */
996 TCGv low = tcg_temp_new();
998 /* Force addr into the temp. */
1001 tcg_gen_mov_tl(t, *addr);
1005 tcg_gen_andi_tl(low, t, 3);
1006 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1007 tcg_gen_andi_tl(t, t, ~3);
1008 tcg_gen_or_tl(t, t, low);
1009 tcg_gen_mov_tl(env_imm, t);
1017 /* Force addr into the temp. */
1020 tcg_gen_xori_tl(t, *addr, 2);
1023 tcg_gen_xori_tl(t, t, 2);
1027 cpu_abort(dc->env, "Invalid reverse size\n");
1032 /* lwx does not throw unaligned access errors, so force alignment */
1034 /* Force addr into the temp. */
1037 tcg_gen_mov_tl(t, *addr);
1040 tcg_gen_andi_tl(t, t, ~3);
1043 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1046 /* Verify alignment if needed. */
1047 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1048 TCGv v = tcg_temp_new();
1051 * Microblaze gives MMU faults priority over faults due to
1052 * unaligned addresses. That's why we speculatively do the load
1053 * into v. If the load succeeds, we verify alignment of the
1054 * address and if that succeeds we write into the destination reg.
1056 gen_load(dc, v, *addr, size);
1058 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1059 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1060 tcg_const_tl(0), tcg_const_tl(size - 1));
1063 dec_byteswap(dc, cpu_R[dc->rd], v, size);
1065 tcg_gen_mov_tl(cpu_R[dc->rd], v);
1071 gen_load(dc, cpu_R[dc->rd], *addr, size);
1073 dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size);
1076 /* We are loading into r0, no need to reverse. */
1077 gen_load(dc, env_imm, *addr, size);
1082 /* no support for for AXI exclusive so always clear C */
1083 write_carryi(dc, 0);
1084 tcg_gen_st_tl(*addr, cpu_env, offsetof(CPUMBState, res_addr));
1091 static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
1094 int mem_index = cpu_mmu_index(dc->env);
1097 tcg_gen_qemu_st8(val, addr, mem_index);
1098 else if (size == 2) {
1099 tcg_gen_qemu_st16(val, addr, mem_index);
1100 } else if (size == 4) {
1101 tcg_gen_qemu_st32(val, addr, mem_index);
1103 cpu_abort(dc->env, "Incorrect store size %d\n", size);
1106 static void dec_store(DisasContext *dc)
1108 TCGv t, *addr, swx_addr, r_check;
1110 unsigned int size, rev = 0, ex = 0;
1112 size = 1 << (dc->opcode & 3);
1114 rev = (dc->ir >> 9) & 1;
1115 ex = (dc->ir >> 10) & 1;
1118 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
1119 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1120 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1121 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1125 LOG_DIS("s%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
1128 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1130 addr = compute_ldst_addr(dc, &t);
1132 r_check = tcg_temp_new();
1133 swx_addr = tcg_temp_local_new();
1136 /* Force addr into the swx_addr. */
1137 tcg_gen_mov_tl(swx_addr, *addr);
1139 /* swx does not throw unaligned access errors, so force alignment */
1140 tcg_gen_andi_tl(swx_addr, swx_addr, ~3);
1142 tcg_gen_ld_tl(r_check, cpu_env, offsetof(CPUMBState, res_addr));
1143 write_carryi(dc, 1);
1144 swx_skip = gen_new_label();
1145 tcg_gen_brcond_tl(TCG_COND_NE, r_check, swx_addr, swx_skip);
1146 write_carryi(dc, 0);
1149 if (rev && size != 4) {
1150 /* Endian reverse the address. t is addr. */
1158 TCGv low = tcg_temp_new();
1160 /* Force addr into the temp. */
1163 tcg_gen_mov_tl(t, *addr);
1167 tcg_gen_andi_tl(low, t, 3);
1168 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1169 tcg_gen_andi_tl(t, t, ~3);
1170 tcg_gen_or_tl(t, t, low);
1171 tcg_gen_mov_tl(env_imm, t);
1179 /* Force addr into the temp. */
1182 tcg_gen_xori_tl(t, *addr, 2);
1185 tcg_gen_xori_tl(t, t, 2);
1189 cpu_abort(dc->env, "Invalid reverse size\n");
1194 TCGv bs_data = tcg_temp_new();
1195 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1196 gen_store(dc, *addr, bs_data, size);
1197 tcg_temp_free(bs_data);
1199 gen_store(dc, *addr, cpu_R[dc->rd], size);
1203 TCGv bs_data = tcg_temp_new();
1204 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1205 gen_store(dc, *addr, bs_data, size);
1206 tcg_temp_free(bs_data);
1208 gen_store(dc, *addr, cpu_R[dc->rd], size);
1212 /* Verify alignment if needed. */
1213 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1214 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1215 /* FIXME: if the alignment is wrong, we should restore the value
1216 * in memory. One possible way to achieve this is to probe
1217 * the MMU prior to the memaccess, thay way we could put
1218 * the alignment checks in between the probe and the mem
1221 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1222 tcg_const_tl(1), tcg_const_tl(size - 1));
1226 gen_set_label(swx_skip);
1228 tcg_temp_free(r_check);
1229 tcg_temp_free(swx_addr);
1235 static inline void eval_cc(DisasContext *dc, unsigned int cc,
1236 TCGv d, TCGv a, TCGv b)
1240 tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
1243 tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
1246 tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
1249 tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
1252 tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
1255 tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
1258 cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
1263 static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
1267 l1 = gen_new_label();
1268 /* Conditional jmp. */
1269 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
1270 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
1271 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
1275 static void dec_bcc(DisasContext *dc)
1280 cc = EXTRACT_FIELD(dc->ir, 21, 23);
1281 dslot = dc->ir & (1 << 25);
1282 LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
1284 dc->delayed_branch = 1;
1286 dc->delayed_branch = 2;
1287 dc->tb_flags |= D_FLAG;
1288 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1289 cpu_env, offsetof(CPUMBState, bimm));
1292 if (dec_alu_op_b_is_small_imm(dc)) {
1293 int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
1295 tcg_gen_movi_tl(env_btarget, dc->pc + offset);
1296 dc->jmp = JMP_DIRECT_CC;
1297 dc->jmp_pc = dc->pc + offset;
1299 dc->jmp = JMP_INDIRECT;
1300 tcg_gen_movi_tl(env_btarget, dc->pc);
1301 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1303 eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
1306 static void dec_br(DisasContext *dc)
1308 unsigned int dslot, link, abs, mbar;
1309 int mem_index = cpu_mmu_index(dc->env);
1311 dslot = dc->ir & (1 << 20);
1312 abs = dc->ir & (1 << 19);
1313 link = dc->ir & (1 << 18);
1315 /* Memory barrier. */
1316 mbar = (dc->ir >> 16) & 31;
1317 if (mbar == 2 && dc->imm == 4) {
1318 LOG_DIS("mbar %d\n", dc->rd);
1320 dc->cpustate_changed = 1;
1324 LOG_DIS("br%s%s%s%s imm=%x\n",
1325 abs ? "a" : "", link ? "l" : "",
1326 dc->type_b ? "i" : "", dslot ? "d" : "",
1329 dc->delayed_branch = 1;
1331 dc->delayed_branch = 2;
1332 dc->tb_flags |= D_FLAG;
1333 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1334 cpu_env, offsetof(CPUMBState, bimm));
1337 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1339 dc->jmp = JMP_INDIRECT;
1341 tcg_gen_movi_tl(env_btaken, 1);
1342 tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1343 if (link && !dslot) {
1344 if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1345 t_gen_raise_exception(dc, EXCP_BREAK);
1347 if ((dc->tb_flags & MSR_EE_FLAG) && 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);
1353 t_gen_raise_exception(dc, EXCP_DEBUG);
1357 if (dec_alu_op_b_is_small_imm(dc)) {
1358 dc->jmp = JMP_DIRECT;
1359 dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1361 tcg_gen_movi_tl(env_btaken, 1);
1362 tcg_gen_movi_tl(env_btarget, dc->pc);
1363 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1368 static inline void do_rti(DisasContext *dc)
1371 t0 = tcg_temp_new();
1372 t1 = tcg_temp_new();
1373 tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1374 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1375 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1377 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1378 tcg_gen_or_tl(t1, t1, t0);
1382 dc->tb_flags &= ~DRTI_FLAG;
1385 static inline void do_rtb(DisasContext *dc)
1388 t0 = tcg_temp_new();
1389 t1 = tcg_temp_new();
1390 tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1391 tcg_gen_shri_tl(t0, t1, 1);
1392 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1394 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1395 tcg_gen_or_tl(t1, t1, t0);
1399 dc->tb_flags &= ~DRTB_FLAG;
1402 static inline void do_rte(DisasContext *dc)
1405 t0 = tcg_temp_new();
1406 t1 = tcg_temp_new();
1408 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1409 tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1410 tcg_gen_shri_tl(t0, t1, 1);
1411 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1413 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1414 tcg_gen_or_tl(t1, t1, t0);
1418 dc->tb_flags &= ~DRTE_FLAG;
1421 static void dec_rts(DisasContext *dc)
1423 unsigned int b_bit, i_bit, e_bit;
1424 int mem_index = cpu_mmu_index(dc->env);
1426 i_bit = dc->ir & (1 << 21);
1427 b_bit = dc->ir & (1 << 22);
1428 e_bit = dc->ir & (1 << 23);
1430 dc->delayed_branch = 2;
1431 dc->tb_flags |= D_FLAG;
1432 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1433 cpu_env, offsetof(CPUMBState, bimm));
1436 LOG_DIS("rtid ir=%x\n", dc->ir);
1437 if ((dc->tb_flags & MSR_EE_FLAG)
1438 && mem_index == MMU_USER_IDX) {
1439 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1440 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1442 dc->tb_flags |= DRTI_FLAG;
1444 LOG_DIS("rtbd ir=%x\n", dc->ir);
1445 if ((dc->tb_flags & MSR_EE_FLAG)
1446 && mem_index == MMU_USER_IDX) {
1447 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1448 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1450 dc->tb_flags |= DRTB_FLAG;
1452 LOG_DIS("rted ir=%x\n", dc->ir);
1453 if ((dc->tb_flags & MSR_EE_FLAG)
1454 && mem_index == MMU_USER_IDX) {
1455 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1456 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1458 dc->tb_flags |= DRTE_FLAG;
1460 LOG_DIS("rts ir=%x\n", dc->ir);
1462 dc->jmp = JMP_INDIRECT;
1463 tcg_gen_movi_tl(env_btaken, 1);
1464 tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1467 static int dec_check_fpuv2(DisasContext *dc)
1471 r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1473 if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1474 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1475 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1480 static void dec_fpu(DisasContext *dc)
1482 unsigned int fpu_insn;
1484 if ((dc->tb_flags & MSR_EE_FLAG)
1485 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1486 && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1487 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1488 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1492 fpu_insn = (dc->ir >> 7) & 7;
1496 gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1500 gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1504 gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1508 gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1512 switch ((dc->ir >> 4) & 7) {
1514 gen_helper_fcmp_un(cpu_R[dc->rd],
1515 cpu_R[dc->ra], cpu_R[dc->rb]);
1518 gen_helper_fcmp_lt(cpu_R[dc->rd],
1519 cpu_R[dc->ra], cpu_R[dc->rb]);
1522 gen_helper_fcmp_eq(cpu_R[dc->rd],
1523 cpu_R[dc->ra], cpu_R[dc->rb]);
1526 gen_helper_fcmp_le(cpu_R[dc->rd],
1527 cpu_R[dc->ra], cpu_R[dc->rb]);
1530 gen_helper_fcmp_gt(cpu_R[dc->rd],
1531 cpu_R[dc->ra], cpu_R[dc->rb]);
1534 gen_helper_fcmp_ne(cpu_R[dc->rd],
1535 cpu_R[dc->ra], cpu_R[dc->rb]);
1538 gen_helper_fcmp_ge(cpu_R[dc->rd],
1539 cpu_R[dc->ra], cpu_R[dc->rb]);
1542 qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
1543 fpu_insn, dc->pc, dc->opcode);
1544 dc->abort_at_next_insn = 1;
1550 if (!dec_check_fpuv2(dc)) {
1553 gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]);
1557 if (!dec_check_fpuv2(dc)) {
1560 gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]);
1564 if (!dec_check_fpuv2(dc)) {
1567 gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]);
1571 qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
1572 fpu_insn, dc->pc, dc->opcode);
1573 dc->abort_at_next_insn = 1;
1578 static void dec_null(DisasContext *dc)
1580 if ((dc->tb_flags & MSR_EE_FLAG)
1581 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1582 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1583 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1586 qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1587 dc->abort_at_next_insn = 1;
1590 /* Insns connected to FSL or AXI stream attached devices. */
1591 static void dec_stream(DisasContext *dc)
1593 int mem_index = cpu_mmu_index(dc->env);
1594 TCGv_i32 t_id, t_ctrl;
1597 LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put",
1598 dc->type_b ? "" : "d", dc->imm);
1600 if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
1601 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1602 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1606 t_id = tcg_temp_new();
1608 tcg_gen_movi_tl(t_id, dc->imm & 0xf);
1609 ctrl = dc->imm >> 10;
1611 tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
1612 ctrl = dc->imm >> 5;
1615 t_ctrl = tcg_const_tl(ctrl);
1618 gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
1620 gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
1622 tcg_temp_free(t_id);
1623 tcg_temp_free(t_ctrl);
1626 static struct decoder_info {
1631 void (*dec)(DisasContext *dc);
1639 {DEC_BARREL, dec_barrel},
1641 {DEC_ST, dec_store},
1650 {DEC_STREAM, dec_stream},
1654 static inline void decode(DisasContext *dc)
1659 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
1660 tcg_gen_debug_insn_start(dc->pc);
1662 dc->ir = ir = ldl_code(dc->pc);
1663 LOG_DIS("%8.8x\t", dc->ir);
1668 if ((dc->tb_flags & MSR_EE_FLAG)
1669 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1670 && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1671 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1672 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1676 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1678 if (dc->nr_nops > 4)
1679 cpu_abort(dc->env, "fetching nop sequence\n");
1681 /* bit 2 seems to indicate insn type. */
1682 dc->type_b = ir & (1 << 29);
1684 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1685 dc->rd = EXTRACT_FIELD(ir, 21, 25);
1686 dc->ra = EXTRACT_FIELD(ir, 16, 20);
1687 dc->rb = EXTRACT_FIELD(ir, 11, 15);
1688 dc->imm = EXTRACT_FIELD(ir, 0, 15);
1690 /* Large switch for all insns. */
1691 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1692 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1699 static void check_breakpoint(CPUMBState *env, DisasContext *dc)
1703 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1704 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1705 if (bp->pc == dc->pc) {
1706 t_gen_raise_exception(dc, EXCP_DEBUG);
1707 dc->is_jmp = DISAS_UPDATE;
1713 /* generate intermediate code for basic block 'tb'. */
1715 gen_intermediate_code_internal(CPUMBState *env, TranslationBlock *tb,
1718 uint16_t *gen_opc_end;
1721 struct DisasContext ctx;
1722 struct DisasContext *dc = &ctx;
1723 uint32_t next_page_start, org_flags;
1728 qemu_log_try_set_file(stderr);
1733 org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1735 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
1737 dc->is_jmp = DISAS_NEXT;
1739 dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1740 if (dc->delayed_branch) {
1741 dc->jmp = JMP_INDIRECT;
1744 dc->singlestep_enabled = env->singlestep_enabled;
1745 dc->cpustate_changed = 0;
1746 dc->abort_at_next_insn = 0;
1750 cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1752 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1754 qemu_log("--------------\n");
1755 log_cpu_state(env, 0);
1759 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1762 max_insns = tb->cflags & CF_COUNT_MASK;
1764 max_insns = CF_COUNT_MASK;
1770 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1771 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1775 check_breakpoint(env, dc);
1778 j = gen_opc_ptr - gen_opc_buf;
1782 gen_opc_instr_start[lj++] = 0;
1784 gen_opc_pc[lj] = dc->pc;
1785 gen_opc_instr_start[lj] = 1;
1786 gen_opc_icount[lj] = num_insns;
1790 LOG_DIS("%8.8x:\t", dc->pc);
1792 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1798 dc->tb_flags &= ~IMM_FLAG;
1802 if (dc->delayed_branch) {
1803 dc->delayed_branch--;
1804 if (!dc->delayed_branch) {
1805 if (dc->tb_flags & DRTI_FLAG)
1807 if (dc->tb_flags & DRTB_FLAG)
1809 if (dc->tb_flags & DRTE_FLAG)
1811 /* Clear the delay slot flag. */
1812 dc->tb_flags &= ~D_FLAG;
1813 /* If it is a direct jump, try direct chaining. */
1814 if (dc->jmp == JMP_INDIRECT) {
1815 eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1816 dc->is_jmp = DISAS_JUMP;
1817 } else if (dc->jmp == JMP_DIRECT) {
1819 gen_goto_tb(dc, 0, dc->jmp_pc);
1820 dc->is_jmp = DISAS_TB_JUMP;
1821 } else if (dc->jmp == JMP_DIRECT_CC) {
1825 l1 = gen_new_label();
1826 /* Conditional jmp. */
1827 tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1828 gen_goto_tb(dc, 1, dc->pc);
1830 gen_goto_tb(dc, 0, dc->jmp_pc);
1832 dc->is_jmp = DISAS_TB_JUMP;
1837 if (env->singlestep_enabled)
1839 } while (!dc->is_jmp && !dc->cpustate_changed
1840 && gen_opc_ptr < gen_opc_end
1842 && (dc->pc < next_page_start)
1843 && num_insns < max_insns);
1846 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1847 if (dc->tb_flags & D_FLAG) {
1848 dc->is_jmp = DISAS_UPDATE;
1849 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1855 if (tb->cflags & CF_LAST_IO)
1857 /* Force an update if the per-tb cpu state has changed. */
1858 if (dc->is_jmp == DISAS_NEXT
1859 && (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1860 dc->is_jmp = DISAS_UPDATE;
1861 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1865 if (unlikely(env->singlestep_enabled)) {
1866 TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
1868 if (dc->is_jmp != DISAS_JUMP) {
1869 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1871 gen_helper_raise_exception(tmp);
1872 tcg_temp_free_i32(tmp);
1874 switch(dc->is_jmp) {
1876 gen_goto_tb(dc, 1, npc);
1881 /* indicate that the hash table must be used
1882 to find the next TB */
1886 /* nothing more to generate */
1890 gen_icount_end(tb, num_insns);
1891 *gen_opc_ptr = INDEX_op_end;
1893 j = gen_opc_ptr - gen_opc_buf;
1896 gen_opc_instr_start[lj++] = 0;
1898 tb->size = dc->pc - pc_start;
1899 tb->icount = num_insns;
1904 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1907 log_target_disas(pc_start, dc->pc - pc_start, 0);
1909 qemu_log("\nisize=%d osize=%td\n",
1910 dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
1914 assert(!dc->abort_at_next_insn);
1917 void gen_intermediate_code (CPUMBState *env, struct TranslationBlock *tb)
1919 gen_intermediate_code_internal(env, tb, 0);
1922 void gen_intermediate_code_pc (CPUMBState *env, struct TranslationBlock *tb)
1924 gen_intermediate_code_internal(env, tb, 1);
1927 void cpu_dump_state (CPUMBState *env, FILE *f, fprintf_function cpu_fprintf,
1935 cpu_fprintf(f, "IN: PC=%x %s\n",
1936 env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1937 cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1938 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1939 env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1940 cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1941 env->btaken, env->btarget,
1942 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1943 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1944 (env->sregs[SR_MSR] & MSR_EIP),
1945 (env->sregs[SR_MSR] & MSR_IE));
1947 for (i = 0; i < 32; i++) {
1948 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1949 if ((i + 1) % 4 == 0)
1950 cpu_fprintf(f, "\n");
1952 cpu_fprintf(f, "\n\n");
1955 MicroBlazeCPU *cpu_mb_init(const char *cpu_model)
1958 static int tcg_initialized = 0;
1961 cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
1963 cpu_reset(CPU(cpu));
1964 qemu_init_vcpu(&cpu->env);
1966 if (tcg_initialized) {
1970 tcg_initialized = 1;
1972 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1974 env_debug = tcg_global_mem_new(TCG_AREG0,
1975 offsetof(CPUMBState, debug),
1977 env_iflags = tcg_global_mem_new(TCG_AREG0,
1978 offsetof(CPUMBState, iflags),
1980 env_imm = tcg_global_mem_new(TCG_AREG0,
1981 offsetof(CPUMBState, imm),
1983 env_btarget = tcg_global_mem_new(TCG_AREG0,
1984 offsetof(CPUMBState, btarget),
1986 env_btaken = tcg_global_mem_new(TCG_AREG0,
1987 offsetof(CPUMBState, btaken),
1989 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1990 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1991 offsetof(CPUMBState, regs[i]),
1994 for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
1995 cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
1996 offsetof(CPUMBState, sregs[i]),
1997 special_regnames[i]);
1999 #define GEN_HELPER 2
2005 void restore_state_to_opc(CPUMBState *env, TranslationBlock *tb, int pc_pos)
2007 env->sregs[SR_PC] = gen_opc_pc[pc_pos];