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target/ppc: powerpc_excp: Set alternate SRRs directly 

There are currently only two interrupts that use alternate SRRs, so
let them write to them directly during the setup code.

No functional change intended.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20211229165751.3774248-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Fabiano Rosas 2022-01-04 07:55:34 +01:00 committed by Cédric Le Goater
parent 84ade98e87
commit 19e70626f8
1 changed files with 8 additions and 15 deletions
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23
target/ppc/excp_helper.c
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@ -370,7 +370,7 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
target_ulong msr, new_msr, vector;
int srr0, srr1, asrr0, asrr1, lev = -1;
int srr0, srr1, lev = -1;
qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx
" => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp),
@ -392,8 +392,6 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
/* target registers */
srr0 = SPR_SRR0;
srr1 = SPR_SRR1;
asrr0 = -1;
asrr1 = -1;
/*
* check for special resume at 0x100 from doze/nap/sleep/winkle on
@ -483,8 +481,9 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
/* FIXME: choose one or the other based on CPU type */
srr0 = SPR_BOOKE_MCSRR0;
srr1 = SPR_BOOKE_MCSRR1;
asrr0 = SPR_BOOKE_CSRR0;
asrr1 = SPR_BOOKE_CSRR1;
env->spr[SPR_BOOKE_CSRR0] = env->nip;
env->spr[SPR_BOOKE_CSRR1] = msr;
break;
default:
break;
@ -643,8 +642,10 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
/* FIXME: choose one or the other based on CPU type */
srr0 = SPR_BOOKE_DSRR0;
srr1 = SPR_BOOKE_DSRR1;
asrr0 = SPR_BOOKE_CSRR0;
asrr1 = SPR_BOOKE_CSRR1;
env->spr[SPR_BOOKE_CSRR0] = env->nip;
env->spr[SPR_BOOKE_CSRR1] = msr;
/* DBSR already modified by caller */
} else {
cpu_abort(cs, "Debug exception triggered on unsupported model\n");
@ -911,14 +912,6 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
vector |= env->excp_prefix;
/* If any alternate SRR register are defined, duplicate saved values */
if (asrr0 != -1) {
env->spr[asrr0] = env->nip;
}
if (asrr1 != -1) {
env->spr[asrr1] = msr;
}
#if defined(TARGET_PPC64)
if (excp_model == POWERPC_EXCP_BOOKE) {
if (env->spr[SPR_BOOKE_EPCR] & EPCR_ICM) {