2
* Xilinx MicroBlaze emulation for qemu: main translation routines.
4
* Copyright (c) 2009 Edgar E. Iglesias.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* 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
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
31
#include "microblaze-decode.h"
32
#include "qemu-common.h"
40
#if DISAS_MB && !SIM_COMPAT
41
# define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
43
# define LOG_DIS(...) do { } while (0)
48
#define EXTRACT_FIELD(src, start, end) \
49
(((src) >> start) & ((1 << (end - start + 1)) - 1))
51
static TCGv env_debug;
52
static TCGv_ptr cpu_env;
53
static TCGv cpu_R[32];
54
static TCGv cpu_SR[18];
56
static TCGv env_btaken;
57
static TCGv env_btarget;
58
static TCGv env_iflags;
60
#include "gen-icount.h"
62
/* This is the state at translation time. */
63
typedef struct DisasContext {
74
unsigned int cpustate_changed;
75
unsigned int delayed_branch;
76
unsigned int tb_flags, synced_flags; /* tb dependent flags. */
77
unsigned int clear_imm;
82
#define JMP_DIRECT_CC 2
83
#define JMP_INDIRECT 3
87
int abort_at_next_insn;
89
struct TranslationBlock *tb;
90
int singlestep_enabled;
93
static const char *regnames[] =
95
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
101
static const char *special_regnames[] =
103
"rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7",
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
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"sr16", "sr17", "sr18"
108
/* Sign extend at translation time. */
109
static inline int sign_extend(unsigned int val, unsigned int width)
121
static inline void t_sync_flags(DisasContext *dc)
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;
130
static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
132
TCGv_i32 tmp = tcg_const_i32(index);
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;
141
static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
143
TranslationBlock *tb;
145
if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
147
tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
148
tcg_gen_exit_tb((tcg_target_long)tb + n);
150
tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
155
static void read_carry(DisasContext *dc, TCGv d)
157
tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
160
static void write_carry(DisasContext *dc, TCGv v)
162
TCGv t0 = tcg_temp_new();
163
tcg_gen_shli_tl(t0, v, 31);
164
tcg_gen_sari_tl(t0, t0, 31);
165
tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC));
166
tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
168
tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
172
/* True if ALU operand b is a small immediate that may deserve
174
static inline int dec_alu_op_b_is_small_imm(DisasContext *dc)
176
/* Immediate insn without the imm prefix ? */
177
return dc->type_b && !(dc->tb_flags & IMM_FLAG);
180
static inline TCGv *dec_alu_op_b(DisasContext *dc)
183
if (dc->tb_flags & IMM_FLAG)
184
tcg_gen_ori_tl(env_imm, env_imm, dc->imm);
186
tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm));
189
return &cpu_R[dc->rb];
192
static void dec_add(DisasContext *dc)
200
LOG_DIS("add%s%s%s r%d r%d r%d\n",
201
dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "",
202
dc->rd, dc->ra, dc->rb);
204
/* Take care of the easy cases first. */
206
/* k - keep carry, no need to update MSR. */
207
/* If rd == r0, it's a nop. */
209
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
212
/* c - Add carry into the result. */
216
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
223
/* From now on, we can assume k is zero. So we need to update MSR. */
229
tcg_gen_movi_tl(cf, 0);
233
TCGv ncf = tcg_temp_new();
234
gen_helper_carry(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
235
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
236
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
237
write_carry(dc, ncf);
240
gen_helper_carry(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
246
static void dec_sub(DisasContext *dc)
248
unsigned int u, cmp, k, c;
254
cmp = (dc->imm & 1) && (!dc->type_b) && k;
257
LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir);
260
gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
262
gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
267
LOG_DIS("sub%s%s r%d, r%d r%d\n",
268
k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb);
270
/* Take care of the easy cases first. */
272
/* k - keep carry, no need to update MSR. */
273
/* If rd == r0, it's a nop. */
275
tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
278
/* c - Add carry into the result. */
282
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
289
/* From now on, we can assume k is zero. So we need to update MSR. */
290
/* Extract carry. And complement a into na. */
296
tcg_gen_movi_tl(cf, 1);
299
/* d = b + ~a + c. carry defaults to 1. */
300
tcg_gen_not_tl(na, cpu_R[dc->ra]);
303
TCGv ncf = tcg_temp_new();
304
gen_helper_carry(ncf, na, *(dec_alu_op_b(dc)), cf);
305
tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc)));
306
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
307
write_carry(dc, ncf);
310
gen_helper_carry(cf, na, *(dec_alu_op_b(dc)), cf);
317
static void dec_pattern(DisasContext *dc)
322
if ((dc->tb_flags & MSR_EE_FLAG)
323
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
324
&& !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
325
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
326
t_gen_raise_exception(dc, EXCP_HW_EXCP);
329
mode = dc->opcode & 3;
333
LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
335
gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
338
LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
340
TCGv t0 = tcg_temp_local_new();
341
l1 = gen_new_label();
342
tcg_gen_movi_tl(t0, 1);
343
tcg_gen_brcond_tl(TCG_COND_EQ,
344
cpu_R[dc->ra], cpu_R[dc->rb], l1);
345
tcg_gen_movi_tl(t0, 0);
347
tcg_gen_mov_tl(cpu_R[dc->rd], t0);
352
LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
353
l1 = gen_new_label();
355
TCGv t0 = tcg_temp_local_new();
356
tcg_gen_movi_tl(t0, 1);
357
tcg_gen_brcond_tl(TCG_COND_NE,
358
cpu_R[dc->ra], cpu_R[dc->rb], l1);
359
tcg_gen_movi_tl(t0, 0);
361
tcg_gen_mov_tl(cpu_R[dc->rd], t0);
367
"unsupported pattern insn opcode=%x\n", dc->opcode);
372
static void dec_and(DisasContext *dc)
376
if (!dc->type_b && (dc->imm & (1 << 10))) {
381
not = dc->opcode & (1 << 1);
382
LOG_DIS("and%s\n", not ? "n" : "");
388
TCGv t = tcg_temp_new();
389
tcg_gen_not_tl(t, *(dec_alu_op_b(dc)));
390
tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t);
393
tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
396
static void dec_or(DisasContext *dc)
398
if (!dc->type_b && (dc->imm & (1 << 10))) {
403
LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
405
tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
408
static void dec_xor(DisasContext *dc)
410
if (!dc->type_b && (dc->imm & (1 << 10))) {
415
LOG_DIS("xor r%d\n", dc->rd);
417
tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
420
static inline void msr_read(DisasContext *dc, TCGv d)
422
tcg_gen_mov_tl(d, cpu_SR[SR_MSR]);
425
static inline void msr_write(DisasContext *dc, TCGv v)
430
dc->cpustate_changed = 1;
431
/* PVR bit is not writable. */
432
tcg_gen_andi_tl(t, v, ~MSR_PVR);
433
tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
434
tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v);
438
static void dec_msr(DisasContext *dc)
441
unsigned int sr, to, rn;
442
int mem_index = cpu_mmu_index(dc->env);
444
sr = dc->imm & ((1 << 14) - 1);
445
to = dc->imm & (1 << 14);
448
dc->cpustate_changed = 1;
450
/* msrclr and msrset. */
451
if (!(dc->imm & (1 << 15))) {
452
unsigned int clr = dc->ir & (1 << 16);
454
LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set",
457
if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) {
462
if ((dc->tb_flags & MSR_EE_FLAG)
463
&& mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) {
464
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
465
t_gen_raise_exception(dc, EXCP_HW_EXCP);
470
msr_read(dc, cpu_R[dc->rd]);
475
tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc)));
478
tcg_gen_not_tl(t1, t1);
479
tcg_gen_and_tl(t0, t0, t1);
481
tcg_gen_or_tl(t0, t0, t1);
485
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
486
dc->is_jmp = DISAS_UPDATE;
491
if ((dc->tb_flags & MSR_EE_FLAG)
492
&& mem_index == MMU_USER_IDX) {
493
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
494
t_gen_raise_exception(dc, EXCP_HW_EXCP);
499
#if !defined(CONFIG_USER_ONLY)
500
/* Catch read/writes to the mmu block. */
501
if ((sr & ~0xff) == 0x1000) {
503
LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
505
gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]);
507
gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr));
513
LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
518
msr_write(dc, cpu_R[dc->ra]);
521
tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]);
524
tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]);
527
tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
530
cpu_abort(dc->env, "unknown mts reg %x\n", sr);
534
LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm);
538
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
541
msr_read(dc, cpu_R[dc->rd]);
544
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]);
547
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]);
550
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]);
553
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]);
569
tcg_gen_ld_tl(cpu_R[dc->rd],
570
cpu_env, offsetof(CPUState, pvr.regs[rn]));
573
cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
579
tcg_gen_movi_tl(cpu_R[0], 0);
583
/* 64-bit signed mul, lower result in d and upper in d2. */
584
static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
588
t0 = tcg_temp_new_i64();
589
t1 = tcg_temp_new_i64();
591
tcg_gen_ext_i32_i64(t0, a);
592
tcg_gen_ext_i32_i64(t1, b);
593
tcg_gen_mul_i64(t0, t0, t1);
595
tcg_gen_trunc_i64_i32(d, t0);
596
tcg_gen_shri_i64(t0, t0, 32);
597
tcg_gen_trunc_i64_i32(d2, t0);
599
tcg_temp_free_i64(t0);
600
tcg_temp_free_i64(t1);
603
/* 64-bit unsigned muls, lower result in d and upper in d2. */
604
static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
608
t0 = tcg_temp_new_i64();
609
t1 = tcg_temp_new_i64();
611
tcg_gen_extu_i32_i64(t0, a);
612
tcg_gen_extu_i32_i64(t1, b);
613
tcg_gen_mul_i64(t0, t0, t1);
615
tcg_gen_trunc_i64_i32(d, t0);
616
tcg_gen_shri_i64(t0, t0, 32);
617
tcg_gen_trunc_i64_i32(d2, t0);
619
tcg_temp_free_i64(t0);
620
tcg_temp_free_i64(t1);
623
/* Multiplier unit. */
624
static void dec_mul(DisasContext *dc)
627
unsigned int subcode;
629
if ((dc->tb_flags & MSR_EE_FLAG)
630
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
631
&& !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
632
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
633
t_gen_raise_exception(dc, EXCP_HW_EXCP);
637
subcode = dc->imm & 3;
638
d[0] = tcg_temp_new();
639
d[1] = tcg_temp_new();
642
LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
643
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
647
/* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
648
if (subcode >= 1 && subcode <= 3
649
&& !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
655
LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
656
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
659
LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
660
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
663
LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
664
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
667
LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
668
t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
671
cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
680
static void dec_div(DisasContext *dc)
687
if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
688
&& !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
689
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
690
t_gen_raise_exception(dc, EXCP_HW_EXCP);
694
gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
696
gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
698
tcg_gen_movi_tl(cpu_R[dc->rd], 0);
701
static void dec_barrel(DisasContext *dc)
706
if ((dc->tb_flags & MSR_EE_FLAG)
707
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
708
&& !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
709
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
710
t_gen_raise_exception(dc, EXCP_HW_EXCP);
714
s = dc->imm & (1 << 10);
715
t = dc->imm & (1 << 9);
717
LOG_DIS("bs%s%s r%d r%d r%d\n",
718
s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
722
tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
723
tcg_gen_andi_tl(t0, t0, 31);
726
tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
729
tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
731
tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
735
static void dec_bit(DisasContext *dc)
739
int mem_index = cpu_mmu_index(dc->env);
741
op = dc->ir & ((1 << 8) - 1);
747
LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
748
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
752
tcg_gen_shli_tl(t1, t1, 31);
754
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
755
tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
768
LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
771
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
776
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
778
tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
782
LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
783
tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
786
LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
787
tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
794
LOG_DIS("wdc r%d\n", dc->ra);
795
if ((dc->tb_flags & MSR_EE_FLAG)
796
&& mem_index == MMU_USER_IDX) {
797
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
798
t_gen_raise_exception(dc, EXCP_HW_EXCP);
804
LOG_DIS("wic r%d\n", dc->ra);
805
if ((dc->tb_flags & MSR_EE_FLAG)
806
&& mem_index == MMU_USER_IDX) {
807
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
808
t_gen_raise_exception(dc, EXCP_HW_EXCP);
813
cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
814
dc->pc, op, dc->rd, dc->ra, dc->rb);
819
static inline void sync_jmpstate(DisasContext *dc)
821
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
822
if (dc->jmp == JMP_DIRECT) {
823
tcg_gen_movi_tl(env_btaken, 1);
825
dc->jmp = JMP_INDIRECT;
826
tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
830
static void dec_imm(DisasContext *dc)
832
LOG_DIS("imm %x\n", dc->imm << 16);
833
tcg_gen_movi_tl(env_imm, (dc->imm << 16));
834
dc->tb_flags |= IMM_FLAG;
838
static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
841
int mem_index = cpu_mmu_index(dc->env);
844
tcg_gen_qemu_ld8u(dst, addr, mem_index);
845
} else if (size == 2) {
846
tcg_gen_qemu_ld16u(dst, addr, mem_index);
847
} else if (size == 4) {
848
tcg_gen_qemu_ld32u(dst, addr, mem_index);
850
cpu_abort(dc->env, "Incorrect load size %d\n", size);
853
static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
855
unsigned int extimm = dc->tb_flags & IMM_FLAG;
857
/* Treat the common cases first. */
859
/* If any of the regs is r0, return a ptr to the other. */
861
return &cpu_R[dc->rb];
862
} else if (dc->rb == 0) {
863
return &cpu_R[dc->ra];
867
tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
873
return &cpu_R[dc->ra];
876
tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
877
tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
880
tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
886
static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size)
889
tcg_gen_bswap32_tl(dst, src);
890
} else if (size == 2) {
891
TCGv t = tcg_temp_new();
893
/* bswap16 assumes the high bits are zero. */
894
tcg_gen_andi_tl(t, src, 0xffff);
895
tcg_gen_bswap16_tl(dst, t);
899
cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
904
static void dec_load(DisasContext *dc)
907
unsigned int size, rev = 0;
909
size = 1 << (dc->opcode & 3);
912
rev = (dc->ir >> 9) & 1;
915
if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
916
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
917
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
918
t_gen_raise_exception(dc, EXCP_HW_EXCP);
922
LOG_DIS("l%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "");
925
addr = compute_ldst_addr(dc, &t);
928
* When doing reverse accesses we need to do two things.
930
* 1. Reverse the address wrt endianness.
931
* 2. Byteswap the data lanes on the way back into the CPU core.
933
if (rev && size != 4) {
934
/* Endian reverse the address. t is addr. */
942
TCGv low = tcg_temp_new();
944
/* Force addr into the temp. */
947
tcg_gen_mov_tl(t, *addr);
951
tcg_gen_andi_tl(low, t, 3);
952
tcg_gen_sub_tl(low, tcg_const_tl(3), low);
953
tcg_gen_andi_tl(t, t, ~3);
954
tcg_gen_or_tl(t, t, low);
955
tcg_gen_mov_tl(env_imm, t);
963
/* Force addr into the temp. */
966
tcg_gen_xori_tl(t, *addr, 2);
969
tcg_gen_xori_tl(t, t, 2);
973
cpu_abort(dc->env, "Invalid reverse size\n");
978
/* If we get a fault on a dslot, the jmpstate better be in sync. */
981
/* Verify alignment if needed. */
982
if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
983
TCGv v = tcg_temp_new();
986
* Microblaze gives MMU faults priority over faults due to
987
* unaligned addresses. That's why we speculatively do the load
988
* into v. If the load succeeds, we verify alignment of the
989
* address and if that succeeds we write into the destination reg.
991
gen_load(dc, v, *addr, size);
993
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
994
gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
995
tcg_const_tl(0), tcg_const_tl(size - 1));
998
dec_byteswap(dc, cpu_R[dc->rd], v, size);
1000
tcg_gen_mov_tl(cpu_R[dc->rd], v);
1006
gen_load(dc, cpu_R[dc->rd], *addr, size);
1008
dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size);
1011
/* We are loading into r0, no need to reverse. */
1012
gen_load(dc, env_imm, *addr, size);
1020
static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
1023
int mem_index = cpu_mmu_index(dc->env);
1026
tcg_gen_qemu_st8(val, addr, mem_index);
1027
else if (size == 2) {
1028
tcg_gen_qemu_st16(val, addr, mem_index);
1029
} else if (size == 4) {
1030
tcg_gen_qemu_st32(val, addr, mem_index);
1032
cpu_abort(dc->env, "Incorrect store size %d\n", size);
1035
static void dec_store(DisasContext *dc)
1038
unsigned int size, rev = 0;
1040
size = 1 << (dc->opcode & 3);
1042
rev = (dc->ir >> 9) & 1;
1045
if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
1046
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1047
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1048
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1052
LOG_DIS("s%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "");
1054
/* If we get a fault on a dslot, the jmpstate better be in sync. */
1056
addr = compute_ldst_addr(dc, &t);
1058
if (rev && size != 4) {
1059
/* Endian reverse the address. t is addr. */
1067
TCGv low = tcg_temp_new();
1069
/* Force addr into the temp. */
1072
tcg_gen_mov_tl(t, *addr);
1076
tcg_gen_andi_tl(low, t, 3);
1077
tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1078
tcg_gen_andi_tl(t, t, ~3);
1079
tcg_gen_or_tl(t, t, low);
1080
tcg_gen_mov_tl(env_imm, t);
1088
/* Force addr into the temp. */
1091
tcg_gen_xori_tl(t, *addr, 2);
1094
tcg_gen_xori_tl(t, t, 2);
1098
cpu_abort(dc->env, "Invalid reverse size\n");
1103
TCGv bs_data = tcg_temp_new();
1104
dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1105
gen_store(dc, *addr, bs_data, size);
1106
tcg_temp_free(bs_data);
1108
gen_store(dc, *addr, cpu_R[dc->rd], size);
1112
TCGv bs_data = tcg_temp_new();
1113
dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1114
gen_store(dc, *addr, bs_data, size);
1115
tcg_temp_free(bs_data);
1117
gen_store(dc, *addr, cpu_R[dc->rd], size);
1121
/* Verify alignment if needed. */
1122
if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1123
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1124
/* FIXME: if the alignment is wrong, we should restore the value
1125
* in memory. One possible way to acheive this is to probe
1126
* the MMU prior to the memaccess, thay way we could put
1127
* the alignment checks in between the probe and the mem
1130
gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1131
tcg_const_tl(1), tcg_const_tl(size - 1));
1138
static inline void eval_cc(DisasContext *dc, unsigned int cc,
1139
TCGv d, TCGv a, TCGv b)
1143
tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
1146
tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
1149
tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
1152
tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
1155
tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
1158
tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
1161
cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
1166
static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
1170
l1 = gen_new_label();
1171
/* Conditional jmp. */
1172
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
1173
tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
1174
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
1178
static void dec_bcc(DisasContext *dc)
1183
cc = EXTRACT_FIELD(dc->ir, 21, 23);
1184
dslot = dc->ir & (1 << 25);
1185
LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
1187
dc->delayed_branch = 1;
1189
dc->delayed_branch = 2;
1190
dc->tb_flags |= D_FLAG;
1191
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1192
cpu_env, offsetof(CPUState, bimm));
1195
if (dec_alu_op_b_is_small_imm(dc)) {
1196
int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
1198
tcg_gen_movi_tl(env_btarget, dc->pc + offset);
1199
dc->jmp = JMP_DIRECT_CC;
1200
dc->jmp_pc = dc->pc + offset;
1202
dc->jmp = JMP_INDIRECT;
1203
tcg_gen_movi_tl(env_btarget, dc->pc);
1204
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1206
eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
1209
static void dec_br(DisasContext *dc)
1211
unsigned int dslot, link, abs;
1212
int mem_index = cpu_mmu_index(dc->env);
1214
dslot = dc->ir & (1 << 20);
1215
abs = dc->ir & (1 << 19);
1216
link = dc->ir & (1 << 18);
1217
LOG_DIS("br%s%s%s%s imm=%x\n",
1218
abs ? "a" : "", link ? "l" : "",
1219
dc->type_b ? "i" : "", dslot ? "d" : "",
1222
dc->delayed_branch = 1;
1224
dc->delayed_branch = 2;
1225
dc->tb_flags |= D_FLAG;
1226
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1227
cpu_env, offsetof(CPUState, bimm));
1230
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1232
dc->jmp = JMP_INDIRECT;
1234
tcg_gen_movi_tl(env_btaken, 1);
1235
tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1236
if (link && !dslot) {
1237
if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1238
t_gen_raise_exception(dc, EXCP_BREAK);
1240
if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
1241
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1242
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1246
t_gen_raise_exception(dc, EXCP_DEBUG);
1250
if (dec_alu_op_b_is_small_imm(dc)) {
1251
dc->jmp = JMP_DIRECT;
1252
dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1254
tcg_gen_movi_tl(env_btaken, 1);
1255
tcg_gen_movi_tl(env_btarget, dc->pc);
1256
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1261
static inline void do_rti(DisasContext *dc)
1264
t0 = tcg_temp_new();
1265
t1 = tcg_temp_new();
1266
tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1267
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1268
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1270
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1271
tcg_gen_or_tl(t1, t1, t0);
1275
dc->tb_flags &= ~DRTI_FLAG;
1278
static inline void do_rtb(DisasContext *dc)
1281
t0 = tcg_temp_new();
1282
t1 = tcg_temp_new();
1283
tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1284
tcg_gen_shri_tl(t0, t1, 1);
1285
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1287
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1288
tcg_gen_or_tl(t1, t1, t0);
1292
dc->tb_flags &= ~DRTB_FLAG;
1295
static inline void do_rte(DisasContext *dc)
1298
t0 = tcg_temp_new();
1299
t1 = tcg_temp_new();
1301
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1302
tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1303
tcg_gen_shri_tl(t0, t1, 1);
1304
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1306
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1307
tcg_gen_or_tl(t1, t1, t0);
1311
dc->tb_flags &= ~DRTE_FLAG;
1314
static void dec_rts(DisasContext *dc)
1316
unsigned int b_bit, i_bit, e_bit;
1317
int mem_index = cpu_mmu_index(dc->env);
1319
i_bit = dc->ir & (1 << 21);
1320
b_bit = dc->ir & (1 << 22);
1321
e_bit = dc->ir & (1 << 23);
1323
dc->delayed_branch = 2;
1324
dc->tb_flags |= D_FLAG;
1325
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1326
cpu_env, offsetof(CPUState, bimm));
1329
LOG_DIS("rtid ir=%x\n", dc->ir);
1330
if ((dc->tb_flags & MSR_EE_FLAG)
1331
&& mem_index == MMU_USER_IDX) {
1332
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1333
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1335
dc->tb_flags |= DRTI_FLAG;
1337
LOG_DIS("rtbd ir=%x\n", dc->ir);
1338
if ((dc->tb_flags & MSR_EE_FLAG)
1339
&& mem_index == MMU_USER_IDX) {
1340
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1341
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1343
dc->tb_flags |= DRTB_FLAG;
1345
LOG_DIS("rted ir=%x\n", dc->ir);
1346
if ((dc->tb_flags & MSR_EE_FLAG)
1347
&& mem_index == MMU_USER_IDX) {
1348
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1349
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1351
dc->tb_flags |= DRTE_FLAG;
1353
LOG_DIS("rts ir=%x\n", dc->ir);
1355
dc->jmp = JMP_INDIRECT;
1356
tcg_gen_movi_tl(env_btaken, 1);
1357
tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1360
static int dec_check_fpuv2(DisasContext *dc)
1364
r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1366
if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1367
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1368
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1373
static void dec_fpu(DisasContext *dc)
1375
unsigned int fpu_insn;
1377
if ((dc->tb_flags & MSR_EE_FLAG)
1378
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1379
&& !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1380
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1381
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1385
fpu_insn = (dc->ir >> 7) & 7;
1389
gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1393
gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1397
gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1401
gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1405
switch ((dc->ir >> 4) & 7) {
1407
gen_helper_fcmp_un(cpu_R[dc->rd],
1408
cpu_R[dc->ra], cpu_R[dc->rb]);
1411
gen_helper_fcmp_lt(cpu_R[dc->rd],
1412
cpu_R[dc->ra], cpu_R[dc->rb]);
1415
gen_helper_fcmp_eq(cpu_R[dc->rd],
1416
cpu_R[dc->ra], cpu_R[dc->rb]);
1419
gen_helper_fcmp_le(cpu_R[dc->rd],
1420
cpu_R[dc->ra], cpu_R[dc->rb]);
1423
gen_helper_fcmp_gt(cpu_R[dc->rd],
1424
cpu_R[dc->ra], cpu_R[dc->rb]);
1427
gen_helper_fcmp_ne(cpu_R[dc->rd],
1428
cpu_R[dc->ra], cpu_R[dc->rb]);
1431
gen_helper_fcmp_ge(cpu_R[dc->rd],
1432
cpu_R[dc->ra], cpu_R[dc->rb]);
1435
qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
1436
fpu_insn, dc->pc, dc->opcode);
1437
dc->abort_at_next_insn = 1;
1443
if (!dec_check_fpuv2(dc)) {
1446
gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]);
1450
if (!dec_check_fpuv2(dc)) {
1453
gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]);
1457
if (!dec_check_fpuv2(dc)) {
1460
gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]);
1464
qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
1465
fpu_insn, dc->pc, dc->opcode);
1466
dc->abort_at_next_insn = 1;
1471
static void dec_null(DisasContext *dc)
1473
if ((dc->tb_flags & MSR_EE_FLAG)
1474
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1475
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1476
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1479
qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1480
dc->abort_at_next_insn = 1;
1483
/* Insns connected to FSL or AXI stream attached devices. */
1484
static void dec_stream(DisasContext *dc)
1486
int mem_index = cpu_mmu_index(dc->env);
1487
TCGv_i32 t_id, t_ctrl;
1490
LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put",
1491
dc->type_b ? "" : "d", dc->imm);
1493
if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
1494
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1495
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1499
t_id = tcg_temp_new();
1501
tcg_gen_movi_tl(t_id, dc->imm & 0xf);
1502
ctrl = dc->imm >> 10;
1504
tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
1505
ctrl = dc->imm >> 5;
1508
t_ctrl = tcg_const_tl(ctrl);
1511
gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
1513
gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
1515
tcg_temp_free(t_id);
1516
tcg_temp_free(t_ctrl);
1519
static struct decoder_info {
1524
void (*dec)(DisasContext *dc);
1532
{DEC_BARREL, dec_barrel},
1534
{DEC_ST, dec_store},
1543
{DEC_STREAM, dec_stream},
1547
static inline void decode(DisasContext *dc)
1552
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
1553
tcg_gen_debug_insn_start(dc->pc);
1555
dc->ir = ir = ldl_code(dc->pc);
1556
LOG_DIS("%8.8x\t", dc->ir);
1561
if ((dc->tb_flags & MSR_EE_FLAG)
1562
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1563
&& (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1564
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1565
t_gen_raise_exception(dc, EXCP_HW_EXCP);
1569
LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1571
if (dc->nr_nops > 4)
1572
cpu_abort(dc->env, "fetching nop sequence\n");
1574
/* bit 2 seems to indicate insn type. */
1575
dc->type_b = ir & (1 << 29);
1577
dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1578
dc->rd = EXTRACT_FIELD(ir, 21, 25);
1579
dc->ra = EXTRACT_FIELD(ir, 16, 20);
1580
dc->rb = EXTRACT_FIELD(ir, 11, 15);
1581
dc->imm = EXTRACT_FIELD(ir, 0, 15);
1583
/* Large switch for all insns. */
1584
for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1585
if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1592
static void check_breakpoint(CPUState *env, DisasContext *dc)
1596
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1597
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1598
if (bp->pc == dc->pc) {
1599
t_gen_raise_exception(dc, EXCP_DEBUG);
1600
dc->is_jmp = DISAS_UPDATE;
1606
/* generate intermediate code for basic block 'tb'. */
1608
gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
1611
uint16_t *gen_opc_end;
1614
struct DisasContext ctx;
1615
struct DisasContext *dc = &ctx;
1616
uint32_t next_page_start, org_flags;
1621
qemu_log_try_set_file(stderr);
1626
org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1628
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
1630
dc->is_jmp = DISAS_NEXT;
1632
dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1633
if (dc->delayed_branch) {
1634
dc->jmp = JMP_INDIRECT;
1637
dc->singlestep_enabled = env->singlestep_enabled;
1638
dc->cpustate_changed = 0;
1639
dc->abort_at_next_insn = 0;
1643
cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1645
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1647
qemu_log("--------------\n");
1648
log_cpu_state(env, 0);
1652
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1655
max_insns = tb->cflags & CF_COUNT_MASK;
1657
max_insns = CF_COUNT_MASK;
1663
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1664
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1668
check_breakpoint(env, dc);
1671
j = gen_opc_ptr - gen_opc_buf;
1675
gen_opc_instr_start[lj++] = 0;
1677
gen_opc_pc[lj] = dc->pc;
1678
gen_opc_instr_start[lj] = 1;
1679
gen_opc_icount[lj] = num_insns;
1683
LOG_DIS("%8.8x:\t", dc->pc);
1685
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1691
dc->tb_flags &= ~IMM_FLAG;
1695
if (dc->delayed_branch) {
1696
dc->delayed_branch--;
1697
if (!dc->delayed_branch) {
1698
if (dc->tb_flags & DRTI_FLAG)
1700
if (dc->tb_flags & DRTB_FLAG)
1702
if (dc->tb_flags & DRTE_FLAG)
1704
/* Clear the delay slot flag. */
1705
dc->tb_flags &= ~D_FLAG;
1706
/* If it is a direct jump, try direct chaining. */
1707
if (dc->jmp == JMP_INDIRECT) {
1708
eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1709
dc->is_jmp = DISAS_JUMP;
1710
} else if (dc->jmp == JMP_DIRECT) {
1712
gen_goto_tb(dc, 0, dc->jmp_pc);
1713
dc->is_jmp = DISAS_TB_JUMP;
1714
} else if (dc->jmp == JMP_DIRECT_CC) {
1718
l1 = gen_new_label();
1719
/* Conditional jmp. */
1720
tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1721
gen_goto_tb(dc, 1, dc->pc);
1723
gen_goto_tb(dc, 0, dc->jmp_pc);
1725
dc->is_jmp = DISAS_TB_JUMP;
1730
if (env->singlestep_enabled)
1732
} while (!dc->is_jmp && !dc->cpustate_changed
1733
&& gen_opc_ptr < gen_opc_end
1735
&& (dc->pc < next_page_start)
1736
&& num_insns < max_insns);
1739
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1740
if (dc->tb_flags & D_FLAG) {
1741
dc->is_jmp = DISAS_UPDATE;
1742
tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1748
if (tb->cflags & CF_LAST_IO)
1750
/* Force an update if the per-tb cpu state has changed. */
1751
if (dc->is_jmp == DISAS_NEXT
1752
&& (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1753
dc->is_jmp = DISAS_UPDATE;
1754
tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1758
if (unlikely(env->singlestep_enabled)) {
1759
TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
1761
if (dc->is_jmp != DISAS_JUMP) {
1762
tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1764
gen_helper_raise_exception(tmp);
1765
tcg_temp_free_i32(tmp);
1767
switch(dc->is_jmp) {
1769
gen_goto_tb(dc, 1, npc);
1774
/* indicate that the hash table must be used
1775
to find the next TB */
1779
/* nothing more to generate */
1783
gen_icount_end(tb, num_insns);
1784
*gen_opc_ptr = INDEX_op_end;
1786
j = gen_opc_ptr - gen_opc_buf;
1789
gen_opc_instr_start[lj++] = 0;
1791
tb->size = dc->pc - pc_start;
1792
tb->icount = num_insns;
1797
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1800
log_target_disas(pc_start, dc->pc - pc_start, 0);
1802
qemu_log("\nisize=%d osize=%td\n",
1803
dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
1807
assert(!dc->abort_at_next_insn);
1810
void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
1812
gen_intermediate_code_internal(env, tb, 0);
1815
void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
1817
gen_intermediate_code_internal(env, tb, 1);
1820
void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
1828
cpu_fprintf(f, "IN: PC=%x %s\n",
1829
env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1830
cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1831
env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1832
env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1833
cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1834
env->btaken, env->btarget,
1835
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1836
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1837
(env->sregs[SR_MSR] & MSR_EIP),
1838
(env->sregs[SR_MSR] & MSR_IE));
1840
for (i = 0; i < 32; i++) {
1841
cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1842
if ((i + 1) % 4 == 0)
1843
cpu_fprintf(f, "\n");
1845
cpu_fprintf(f, "\n\n");
1848
CPUState *cpu_mb_init (const char *cpu_model)
1851
static int tcg_initialized = 0;
1854
env = g_malloc0(sizeof(CPUState));
1858
qemu_init_vcpu(env);
1859
set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
1861
if (tcg_initialized)
1864
tcg_initialized = 1;
1866
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1868
env_debug = tcg_global_mem_new(TCG_AREG0,
1869
offsetof(CPUState, debug),
1871
env_iflags = tcg_global_mem_new(TCG_AREG0,
1872
offsetof(CPUState, iflags),
1874
env_imm = tcg_global_mem_new(TCG_AREG0,
1875
offsetof(CPUState, imm),
1877
env_btarget = tcg_global_mem_new(TCG_AREG0,
1878
offsetof(CPUState, btarget),
1880
env_btaken = tcg_global_mem_new(TCG_AREG0,
1881
offsetof(CPUState, btaken),
1883
for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1884
cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1885
offsetof(CPUState, regs[i]),
1888
for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
1889
cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
1890
offsetof(CPUState, sregs[i]),
1891
special_regnames[i]);
1893
#define GEN_HELPER 2
1899
void cpu_reset (CPUState *env)
1901
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
1902
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
1903
log_cpu_state(env, 0);
1906
memset(env, 0, offsetof(CPUMBState, breakpoints));
1909
env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
1910
| PVR0_USE_BARREL_MASK \
1911
| PVR0_USE_DIV_MASK \
1912
| PVR0_USE_HW_MUL_MASK \
1913
| PVR0_USE_EXC_MASK \
1914
| PVR0_USE_ICACHE_MASK \
1915
| PVR0_USE_DCACHE_MASK \
1918
env->pvr.regs[2] = PVR2_D_OPB_MASK \
1922
| PVR2_USE_MSR_INSTR \
1923
| PVR2_USE_PCMP_INSTR \
1924
| PVR2_USE_BARREL_MASK \
1925
| PVR2_USE_DIV_MASK \
1926
| PVR2_USE_HW_MUL_MASK \
1927
| PVR2_USE_MUL64_MASK \
1928
| PVR2_USE_FPU_MASK \
1929
| PVR2_USE_FPU2_MASK \
1930
| PVR2_FPU_EXC_MASK \
1932
env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */
1933
env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
1935
#if defined(CONFIG_USER_ONLY)
1936
/* start in user mode with interrupts enabled. */
1937
env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
1938
env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */
1940
env->sregs[SR_MSR] = 0;
1941
mmu_init(&env->mmu);
1943
env->mmu.c_mmu_tlb_access = 3;
1944
env->mmu.c_mmu_zones = 16;
1948
void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos)
1950
env->sregs[SR_PC] = gen_opc_pc[pc_pos];