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target/microblaze: Convert dec_msr to decodetree 

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-24 19:59:57 -07:00
parent 536e340f46
commit 9df297a2d8
2 changed files with 139 additions and 134 deletions
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3
target/microblaze/insns.decode
View File

@ -182,6 +182,9 @@ lwi 111010 ..... ..... ................ @typeb
mbar 101110 imm:5 00010 0000 0000 0000 0100
mfs 100101 rd:5 0 e:1 000 10 rs:14
mts 100101 0 e:1 000 ra:5 11 rs:14
msrclr 100101 ..... 100010 ............... @type_msr
msrset 100101 ..... 100000 ............... @type_msr

270
target/microblaze/translate.c
View File

@ -1300,6 +1300,7 @@ static void msr_read(DisasContext *dc, TCGv_i32 d)
tcg_temp_free_i32(t);
}
#ifndef CONFIG_USER_ONLY
static void msr_write(DisasContext *dc, TCGv_i32 v)
{
dc->cpustate_changed = 1;
@ -1310,6 +1311,7 @@ static void msr_write(DisasContext *dc, TCGv_i32 v)
/* Clear MSR_C and MSR_CC; MSR_PVR is not writable, and is always clear. */
tcg_gen_andi_i32(cpu_msr, v, ~(MSR_C | MSR_CC | MSR_PVR));
}
#endif
static bool do_msrclrset(DisasContext *dc, arg_type_msr *arg, bool set)
{
@ -1358,151 +1360,152 @@ static bool trans_msrset(DisasContext *dc, arg_type_msr *arg)
return do_msrclrset(dc, arg, true);
}
static void dec_msr(DisasContext *dc)
static bool trans_mts(DisasContext *dc, arg_mts *arg)
{
CPUState *cs = CPU(dc->cpu);
unsigned int sr, rn;
bool to, extended = false;
sr = extract32(dc->imm, 0, 14);
to = extract32(dc->imm, 14, 1);
dc->type_b = 1;
if (to) {
dc->cpustate_changed = 1;
if (trap_userspace(dc, true)) {
return true;
}
/* Extended MSRs are only available if addr_size > 32. */
if (dc->cpu->cfg.addr_size > 32) {
/* The E-bit is encoded differently for To/From MSR. */
static const unsigned int e_bit[] = { 19, 24 };
extended = extract32(dc->imm, e_bit[to], 1);
#ifdef CONFIG_USER_ONLY
g_assert_not_reached();
#else
if (arg->e && arg->rs != 0x1003) {
qemu_log_mask(LOG_GUEST_ERROR,
"Invalid extended mts reg 0x%x\n", arg->rs);
return true;
}
if (trap_userspace(dc, to)) {
return;
}
TCGv_i32 src = reg_for_read(dc, arg->ra);
switch (arg->rs) {
case SR_MSR:
msr_write(dc, src);
break;
case SR_FSR:
tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, fsr));
break;
case 0x800:
tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, slr));
break;
case 0x802:
tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, shr));
break;
#if !defined(CONFIG_USER_ONLY)
/* Catch read/writes to the mmu block. */
if ((sr & ~0xff) == 0x1000) {
TCGv_i32 tmp_ext = tcg_const_i32(extended);
TCGv_i32 tmp_sr;
case 0x1000: /* PID */
case 0x1001: /* ZPR */
case 0x1002: /* TLBX */
case 0x1003: /* TLBLO */
case 0x1004: /* TLBHI */
case 0x1005: /* TLBSX */
{
TCGv_i32 tmp_ext = tcg_const_i32(arg->e);
TCGv_i32 tmp_reg = tcg_const_i32(arg->rs & 7);
sr &= 7;
tmp_sr = tcg_const_i32(sr);
if (to) {
gen_helper_mmu_write(cpu_env, tmp_ext, tmp_sr, cpu_R[dc->ra]);
} else {
gen_helper_mmu_read(cpu_R[dc->rd], cpu_env, tmp_ext, tmp_sr);
gen_helper_mmu_write(cpu_env, tmp_ext, tmp_reg, src);
tcg_temp_free_i32(tmp_reg);
tcg_temp_free_i32(tmp_ext);
}
tcg_temp_free_i32(tmp_sr);
tcg_temp_free_i32(tmp_ext);
return;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "Invalid mts reg 0x%x\n", arg->rs);
return true;
}
dc->cpustate_changed = 1;
return true;
#endif
}
static bool trans_mfs(DisasContext *dc, arg_mfs *arg)
{
TCGv_i32 dest = reg_for_write(dc, arg->rd);
if (arg->e) {
switch (arg->rs) {
case SR_EAR:
{
TCGv_i64 t64 = tcg_temp_new_i64();
tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
tcg_gen_extrh_i64_i32(dest, t64);
tcg_temp_free_i64(t64);
}
return true;
#ifndef CONFIG_USER_ONLY
case 0x1003: /* TLBLO */
/* Handled below. */
break;
#endif
case 0x2006 ... 0x2009:
/* High bits of PVR6-9 not implemented. */
tcg_gen_movi_i32(dest, 0);
return true;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"Invalid extended mfs reg 0x%x\n", arg->rs);
return true;
}
}
switch (arg->rs) {
case SR_PC:
tcg_gen_movi_i32(dest, dc->base.pc_next);
break;
case SR_MSR:
msr_read(dc, dest);
break;
case SR_EAR:
{
TCGv_i64 t64 = tcg_temp_new_i64();
tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
tcg_gen_extrl_i64_i32(dest, t64);
tcg_temp_free_i64(t64);
}
break;
case SR_ESR:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, esr));
break;
case SR_FSR:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, fsr));
break;
case SR_BTR:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, btr));
break;
case SR_EDR:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, edr));
break;
case 0x800:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, slr));
break;
case 0x802:
tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, shr));
break;
#ifndef CONFIG_USER_ONLY
case 0x1000: /* PID */
case 0x1001: /* ZPR */
case 0x1002: /* TLBX */
case 0x1003: /* TLBLO */
case 0x1004: /* TLBHI */
case 0x1005: /* TLBSX */
{
TCGv_i32 tmp_ext = tcg_const_i32(arg->e);
TCGv_i32 tmp_reg = tcg_const_i32(arg->rs & 7);
gen_helper_mmu_read(dest, cpu_env, tmp_ext, tmp_reg);
tcg_temp_free_i32(tmp_reg);
tcg_temp_free_i32(tmp_ext);
}
break;
#endif
if (to) {
switch (sr) {
case SR_PC:
break;
case SR_MSR:
msr_write(dc, cpu_R[dc->ra]);
break;
case SR_EAR:
{
TCGv_i64 t64 = tcg_temp_new_i64();
tcg_gen_extu_i32_i64(t64, cpu_R[dc->ra]);
tcg_gen_st_i64(t64, cpu_env, offsetof(CPUMBState, ear));
tcg_temp_free_i64(t64);
}
break;
case SR_ESR:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, esr));
break;
case SR_FSR:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, fsr));
break;
case SR_BTR:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, btr));
break;
case SR_EDR:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, edr));
break;
case 0x800:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, slr));
break;
case 0x802:
tcg_gen_st_i32(cpu_R[dc->ra],
cpu_env, offsetof(CPUMBState, shr));
break;
default:
cpu_abort(CPU(dc->cpu), "unknown mts reg %x\n", sr);
break;
}
} else {
switch (sr) {
case SR_PC:
tcg_gen_movi_i32(cpu_R[dc->rd], dc->base.pc_next);
break;
case SR_MSR:
msr_read(dc, cpu_R[dc->rd]);
break;
case SR_EAR:
{
TCGv_i64 t64 = tcg_temp_new_i64();
tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
if (extended) {
tcg_gen_extrh_i64_i32(cpu_R[dc->rd], t64);
} else {
tcg_gen_extrl_i64_i32(cpu_R[dc->rd], t64);
}
tcg_temp_free_i64(t64);
}
break;
case SR_ESR:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, esr));
break;
case SR_FSR:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, fsr));
break;
case SR_BTR:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, btr));
break;
case SR_EDR:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, edr));
break;
case 0x800:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, slr));
break;
case 0x802:
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, shr));
break;
case 0x2000 ... 0x200c:
rn = sr & 0xf;
tcg_gen_ld_i32(cpu_R[dc->rd],
cpu_env, offsetof(CPUMBState, pvr.regs[rn]));
break;
default:
cpu_abort(cs, "unknown mfs reg %x\n", sr);
break;
}
}
if (dc->rd == 0) {
tcg_gen_movi_i32(cpu_R[0], 0);
case 0x2000 ... 0x200c:
tcg_gen_ld_i32(dest, cpu_env,
offsetof(CPUMBState, pvr.regs[arg->rs - 0x2000]));
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "Invalid mfs reg 0x%x\n", arg->rs);
break;
}
return true;
}
static void do_rti(DisasContext *dc)
@ -1593,7 +1596,6 @@ static struct decoder_info {
};
void (*dec)(DisasContext *dc);
} decinfo[] = {
{DEC_MSR, dec_msr},
{DEC_STREAM, dec_stream},
{{0, 0}, dec_null}
};