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target-microblaze: Make special registers 64-bit

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Extend special registers to 64-bits. This is in preparation for
MFSE/MTSE, moves to and from extended special registers.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
Edgar E. Iglesias 2018-04-14 17:59:29 +02:00
parent ab6dd3808d
commit 0a22f8cf3e
6 changed files with 72 additions and 60 deletions
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99
target/microblaze/translate.c
View file

@ -54,7 +54,7 @@
static TCGv_i32 env_debug;
static TCGv_i32 cpu_R[32];
static TCGv_i32 cpu_SR[14];
static TCGv_i64 cpu_SR[14];
static TCGv_i32 env_imm;
static TCGv_i32 env_btaken;
static TCGv_i32 env_btarget;
@ -123,7 +123,7 @@ static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
TCGv_i32 tmp = tcg_const_i32(index);
t_sync_flags(dc);
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
dc->is_jmp = DISAS_UPDATE;
@ -142,17 +142,18 @@ static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
if (use_goto_tb(dc, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(cpu_SR[SR_PC], dest);
tcg_gen_movi_i64(cpu_SR[SR_PC], dest);
tcg_gen_exit_tb((uintptr_t)dc->tb + n);
} else {
tcg_gen_movi_i32(cpu_SR[SR_PC], dest);
tcg_gen_movi_i64(cpu_SR[SR_PC], dest);
tcg_gen_exit_tb(0);
}
}
static void read_carry(DisasContext *dc, TCGv_i32 d)
{
tcg_gen_shri_i32(d, cpu_SR[SR_MSR], 31);
tcg_gen_extrl_i64_i32(d, cpu_SR[SR_MSR]);
tcg_gen_shri_i32(d, d, 31);
}
/*
@ -161,14 +162,12 @@ static void read_carry(DisasContext *dc, TCGv_i32 d)
*/
static void write_carry(DisasContext *dc, TCGv_i32 v)
{
TCGv_i32 t0 = tcg_temp_new_i32();
tcg_gen_shli_i32(t0, v, 31);
tcg_gen_sari_i32(t0, t0, 31);
tcg_gen_andi_i32(t0, t0, (MSR_C | MSR_CC));
tcg_gen_andi_i32(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
~(MSR_C | MSR_CC));
tcg_gen_or_i32(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
tcg_temp_free_i32(t0);
TCGv_i64 t0 = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(t0, v);
/* Deposit bit 0 into MSR_C and the alias MSR_CC. */
tcg_gen_deposit_i64(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0, 2, 1);
tcg_gen_deposit_i64(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0, 31, 1);
tcg_temp_free_i64(t0);
}
static void write_carryi(DisasContext *dc, bool carry)
@ -187,7 +186,7 @@ static bool trap_illegal(DisasContext *dc, bool cond)
{
if (cond && (dc->tb_flags & MSR_EE_FLAG)
&& (dc->cpu->env.pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
tcg_gen_movi_i32(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
tcg_gen_movi_i64(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
t_gen_raise_exception(dc, EXCP_HW_EXCP);
}
return cond;
@ -203,7 +202,7 @@ static bool trap_userspace(DisasContext *dc, bool cond)
bool cond_user = cond && mem_index == MMU_USER_IDX;
if (cond_user && (dc->tb_flags & MSR_EE_FLAG)) {
tcg_gen_movi_i32(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
tcg_gen_movi_i64(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
t_gen_raise_exception(dc, EXCP_HW_EXCP);
}
return cond_user;
@ -438,20 +437,21 @@ static void dec_xor(DisasContext *dc)
static inline void msr_read(DisasContext *dc, TCGv_i32 d)
{
tcg_gen_mov_i32(d, cpu_SR[SR_MSR]);
tcg_gen_extrl_i64_i32(d, cpu_SR[SR_MSR]);
}
static inline void msr_write(DisasContext *dc, TCGv_i32 v)
{
TCGv_i32 t;
TCGv_i64 t;
t = tcg_temp_new_i32();
t = tcg_temp_new_i64();
dc->cpustate_changed = 1;
/* PVR bit is not writable. */
tcg_gen_andi_i32(t, v, ~MSR_PVR);
tcg_gen_andi_i32(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
tcg_gen_or_i32(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t);
tcg_temp_free(t);
tcg_gen_extu_i32_i64(t, v);
tcg_gen_andi_i64(t, t, ~MSR_PVR);
tcg_gen_andi_i64(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
tcg_gen_or_i64(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t);
tcg_temp_free_i64(t);
}
static void dec_msr(DisasContext *dc)
@ -501,7 +501,7 @@ static void dec_msr(DisasContext *dc)
msr_write(dc, t0);
tcg_temp_free_i32(t0);
tcg_temp_free_i32(t1);
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc + 4);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc + 4);
dc->is_jmp = DISAS_UPDATE;
return;
}
@ -534,7 +534,7 @@ static void dec_msr(DisasContext *dc)
case SR_EAR:
case SR_ESR:
case SR_FSR:
tcg_gen_mov_i32(cpu_SR[sr], cpu_R[dc->ra]);
tcg_gen_extu_i32_i64(cpu_SR[sr], cpu_R[dc->ra]);
break;
case 0x800:
tcg_gen_st_i32(cpu_R[dc->ra],
@ -562,7 +562,7 @@ static void dec_msr(DisasContext *dc)
case SR_ESR:
case SR_FSR:
case SR_BTR:
tcg_gen_mov_i32(cpu_R[dc->rd], cpu_SR[sr]);
tcg_gen_extrl_i64_i32(cpu_R[dc->rd], cpu_SR[sr]);
break;
case 0x800:
tcg_gen_ld_i32(cpu_R[dc->rd],
@ -735,7 +735,8 @@ static void dec_bit(DisasContext *dc)
t0 = tcg_temp_new_i32();
LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
tcg_gen_andi_i32(t0, cpu_SR[SR_MSR], MSR_CC);
tcg_gen_extrl_i64_i32(t0, cpu_SR[SR_MSR]);
tcg_gen_andi_i32(t0, t0, MSR_CC);
write_carry(dc, cpu_R[dc->ra]);
if (dc->rd) {
tcg_gen_shri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 1);
@ -966,7 +967,7 @@ static void dec_load(DisasContext *dc)
tcg_gen_qemu_ld_i32(v, addr, cpu_mmu_index(&dc->cpu->env, false), mop);
if ((dc->cpu->env.pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc);
gen_helper_memalign(cpu_env, addr, tcg_const_i32(dc->rd),
tcg_const_i32(0), tcg_const_i32(size - 1));
}
@ -1078,7 +1079,7 @@ static void dec_store(DisasContext *dc)
/* Verify alignment if needed. */
if ((dc->cpu->env.pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc);
/* FIXME: if the alignment is wrong, we should restore the value
* in memory. One possible way to achieve this is to probe
* the MMU prior to the memaccess, thay way we could put
@ -1124,13 +1125,13 @@ static inline void eval_cc(DisasContext *dc, unsigned int cc,
}
}
static void eval_cond_jmp(DisasContext *dc, TCGv_i32 pc_true, TCGv_i32 pc_false)
static void eval_cond_jmp(DisasContext *dc, TCGv_i32 pc_true, TCGv_i64 pc_false)
{
TCGLabel *l1 = gen_new_label();
/* Conditional jmp. */
tcg_gen_mov_i32(cpu_SR[SR_PC], pc_false);
tcg_gen_mov_i64(cpu_SR[SR_PC], pc_false);
tcg_gen_brcondi_i32(TCG_COND_EQ, env_btaken, 0, l1);
tcg_gen_mov_i32(cpu_SR[SR_PC], pc_true);
tcg_gen_extu_i32_i64(cpu_SR[SR_PC], pc_true);
gen_set_label(l1);
}
@ -1187,7 +1188,7 @@ static void dec_br(DisasContext *dc)
tcg_gen_st_i32(tmp_1, cpu_env,
-offsetof(MicroBlazeCPU, env)
+offsetof(CPUState, halted));
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc + 4);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc + 4);
gen_helper_raise_exception(cpu_env, tmp_hlt);
tcg_temp_free_i32(tmp_hlt);
tcg_temp_free_i32(tmp_1);
@ -1246,8 +1247,9 @@ static inline void do_rti(DisasContext *dc)
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
tcg_gen_shri_i32(t0, cpu_SR[SR_MSR], 1);
tcg_gen_ori_i32(t1, cpu_SR[SR_MSR], MSR_IE);
tcg_gen_extrl_i64_i32(t1, cpu_SR[SR_MSR]);
tcg_gen_shri_i32(t0, t1, 1);
tcg_gen_ori_i32(t1, t1, MSR_IE);
tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
tcg_gen_andi_i32(t1, t1, ~(MSR_VM | MSR_UM));
@ -1263,7 +1265,8 @@ static inline void do_rtb(DisasContext *dc)
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
tcg_gen_andi_i32(t1, cpu_SR[SR_MSR], ~MSR_BIP);
tcg_gen_extrl_i64_i32(t1, cpu_SR[SR_MSR]);
tcg_gen_andi_i32(t1, t1, ~MSR_BIP);
tcg_gen_shri_i32(t0, t1, 1);
tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
@ -1281,7 +1284,8 @@ static inline void do_rte(DisasContext *dc)
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
tcg_gen_ori_i32(t1, cpu_SR[SR_MSR], MSR_EE);
tcg_gen_extrl_i64_i32(t1, cpu_SR[SR_MSR]);
tcg_gen_ori_i32(t1, t1, MSR_EE);
tcg_gen_andi_i32(t1, t1, ~MSR_EIP);
tcg_gen_shri_i32(t0, t1, 1);
tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
@ -1331,7 +1335,7 @@ static void dec_rts(DisasContext *dc)
static int dec_check_fpuv2(DisasContext *dc)
{
if ((dc->cpu->cfg.use_fpu != 2) && (dc->tb_flags & MSR_EE_FLAG)) {
tcg_gen_movi_i32(cpu_SR[SR_ESR], ESR_EC_FPU);
tcg_gen_movi_i64(cpu_SR[SR_ESR], ESR_EC_FPU);
t_gen_raise_exception(dc, EXCP_HW_EXCP);
}
return (dc->cpu->cfg.use_fpu == 2) ? 0 : PVR2_USE_FPU2_MASK;
@ -1596,7 +1600,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
#if SIM_COMPAT
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc);
tcg_gen_movi_i64(cpu_SR[SR_PC], dc->pc);
gen_helper_debug();
}
#endif
@ -1638,7 +1642,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
dc->tb_flags &= ~D_FLAG;
/* If it is a direct jump, try direct chaining. */
if (dc->jmp == JMP_INDIRECT) {
eval_cond_jmp(dc, env_btarget, tcg_const_i32(dc->pc));
eval_cond_jmp(dc, env_btarget, tcg_const_i64(dc->pc));
dc->is_jmp = DISAS_JUMP;
} else if (dc->jmp == JMP_DIRECT) {
t_sync_flags(dc);
@ -1671,7 +1675,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
if (dc->tb_flags & D_FLAG) {
dc->is_jmp = DISAS_UPDATE;
tcg_gen_movi_i32(cpu_SR[SR_PC], npc);
tcg_gen_movi_i64(cpu_SR[SR_PC], npc);
sync_jmpstate(dc);
} else
npc = dc->jmp_pc;
@ -1683,7 +1687,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
if (dc->is_jmp == DISAS_NEXT
&& (dc->cpustate_changed || org_flags != dc->tb_flags)) {
dc->is_jmp = DISAS_UPDATE;
tcg_gen_movi_i32(cpu_SR[SR_PC], npc);
tcg_gen_movi_i64(cpu_SR[SR_PC], npc);
}
t_sync_flags(dc);
@ -1691,7 +1695,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
if (dc->is_jmp != DISAS_JUMP) {
tcg_gen_movi_i32(cpu_SR[SR_PC], npc);
tcg_gen_movi_i64(cpu_SR[SR_PC], npc);
}
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
@ -1741,17 +1745,18 @@ void mb_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
if (!env || !f)
return;
cpu_fprintf(f, "IN: PC=%x %s\n",
cpu_fprintf(f, "IN: PC=%" PRIx64 " %s\n",
env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
cpu_fprintf(f, "rmsr=%" PRIx64 " resr=%" PRIx64 " rear=%" PRIx64 " "
"debug=%x imm=%x iflags=%x fsr=%" PRIx64 "\n",
env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
env->btaken, env->btarget,
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
(env->sregs[SR_MSR] & MSR_EIP),
(env->sregs[SR_MSR] & MSR_IE));
(bool)(env->sregs[SR_MSR] & MSR_EIP),
(bool)(env->sregs[SR_MSR] & MSR_IE));
for (i = 0; i < 32; i++) {
cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
@ -1792,7 +1797,7 @@ void mb_tcg_init(void)
regnames[i]);
}
for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
cpu_SR[i] = tcg_global_mem_new_i32(cpu_env,
cpu_SR[i] = tcg_global_mem_new_i64(cpu_env,
offsetof(CPUMBState, sregs[i]),
special_regnames[i]);
}