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PPC: Remove env->hreset_excp_prefix 

This value is not needed if we use correctly the MSR[IP] bit.

excp_prefix is always 0x00000000, except when the MSR[IP] bit is
implemented and set to 1, in that case excp_prefix is 0xfff00000.

The handling of MSR[IP] was already implemented but not used at reset
because the value of env->msr was changed "manually".

The patch uses the function hreg_store_msr() to set env->msr, this
ensures a good handling of MSR[IP] at reset, and therefore a good value
for excp_prefix.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Fabien Chouteau 2013-03-29 02:06:27 +00:00 committed by Alexander Graf
parent 3b961124bf
commit 2cf3eb6df5
4 changed files with 16 additions and 35 deletions
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6
hw/ppc/spapr.c
View File

@ -801,8 +801,10 @@ static void ppc_spapr_init(QEMUMachineInitArgs *args)
/* Set time-base frequency to 512 MHz */
cpu_ppc_tb_init(env, TIMEBASE_FREQ);
/* PAPR always has exception vectors in RAM not ROM */
env->hreset_excp_prefix = 0;
/* PAPR always has exception vectors in RAM not ROM. To ensure this,
* MSR[IP] should never be set.
*/
env->msr_mask &= ~(1 << 6);
/* Tell KVM that we're in PAPR mode */
if (kvm_enabled()) {

1
target-ppc/cpu.h
View File

@ -1026,7 +1026,6 @@ struct CPUPPCState {
/* Exception vectors */
target_ulong excp_vectors[POWERPC_EXCP_NB];
target_ulong excp_prefix;
target_ulong hreset_excp_prefix;
target_ulong ivor_mask;
target_ulong ivpr_mask;
target_ulong hreset_vector;

2
target-ppc/machine.c
View File

@ -78,7 +78,6 @@ void cpu_save(QEMUFile *f, void *opaque)
for (i = 0; i < POWERPC_EXCP_NB; i++)
qemu_put_betls(f, &env->excp_vectors[i]);
qemu_put_betls(f, &env->excp_prefix);
qemu_put_betls(f, &env->hreset_excp_prefix);
qemu_put_betls(f, &env->ivor_mask);
qemu_put_betls(f, &env->ivpr_mask);
qemu_put_betls(f, &env->hreset_vector);
@ -167,7 +166,6 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
for (i = 0; i < POWERPC_EXCP_NB; i++)
qemu_get_betls(f, &env->excp_vectors[i]);
qemu_get_betls(f, &env->excp_prefix);
qemu_get_betls(f, &env->hreset_excp_prefix);
qemu_get_betls(f, &env->ivor_mask);
qemu_get_betls(f, &env->ivpr_mask);
qemu_get_betls(f, &env->hreset_vector);

42
target-ppc/translate_init.c
View File

@ -2593,7 +2593,6 @@ static void init_excp_4xx_real (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_FIT] = 0x00001010;
env->excp_vectors[POWERPC_EXCP_WDT] = 0x00001020;
env->excp_vectors[POWERPC_EXCP_DEBUG] = 0x00002000;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFF0UL;
env->ivpr_mask = 0xFFFF0000UL;
/* Hardware reset vector */
@ -2618,7 +2617,6 @@ static void init_excp_4xx_softmmu (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_DTLB] = 0x00001100;
env->excp_vectors[POWERPC_EXCP_ITLB] = 0x00001200;
env->excp_vectors[POWERPC_EXCP_DEBUG] = 0x00002000;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFF0UL;
env->ivpr_mask = 0xFFFF0000UL;
/* Hardware reset vector */
@ -2644,7 +2642,6 @@ static void init_excp_MPC5xx (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001C00;
env->excp_vectors[POWERPC_EXCP_MEXTBR] = 0x00001E00;
env->excp_vectors[POWERPC_EXCP_NMEXTBR] = 0x00001F00;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFF0UL;
env->ivpr_mask = 0xFFFF0000UL;
/* Hardware reset vector */
@ -2676,7 +2673,6 @@ static void init_excp_MPC8xx (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001C00;
env->excp_vectors[POWERPC_EXCP_MEXTBR] = 0x00001E00;
env->excp_vectors[POWERPC_EXCP_NMEXTBR] = 0x00001F00;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFF0UL;
env->ivpr_mask = 0xFFFF0000UL;
/* Hardware reset vector */
@ -2704,7 +2700,6 @@ static void init_excp_G2 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_DSTLB] = 0x00001200;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2733,7 +2728,6 @@ static void init_excp_e200(CPUPPCState *env, target_ulong ivpr_mask)
env->excp_vectors[POWERPC_EXCP_SPEU] = 0x00000000;
env->excp_vectors[POWERPC_EXCP_EFPDI] = 0x00000000;
env->excp_vectors[POWERPC_EXCP_EFPRI] = 0x00000000;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFF7UL;
env->ivpr_mask = ivpr_mask;
/* Hardware reset vector */
@ -2760,7 +2754,6 @@ static void init_excp_BookE (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_DTLB] = 0x00000000;
env->excp_vectors[POWERPC_EXCP_ITLB] = 0x00000000;
env->excp_vectors[POWERPC_EXCP_DEBUG] = 0x00000000;
env->hreset_excp_prefix = 0x00000000UL;
env->ivor_mask = 0x0000FFE0UL;
env->ivpr_mask = 0xFFFF0000UL;
/* Hardware reset vector */
@ -2783,7 +2776,6 @@ static void init_excp_601 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IO] = 0x00000A00;
env->excp_vectors[POWERPC_EXCP_SYSCALL] = 0x00000C00;
env->excp_vectors[POWERPC_EXCP_RUNM] = 0x00002000;
env->hreset_excp_prefix = 0xFFF00000UL;
/* Hardware reset vector */
env->hreset_vector = 0x00000100UL;
#endif
@ -2811,7 +2803,6 @@ static void init_excp_602 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_WDT] = 0x00001500;
env->excp_vectors[POWERPC_EXCP_EMUL] = 0x00001600;
env->hreset_excp_prefix = 0xFFF00000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2836,7 +2827,6 @@ static void init_excp_603 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_DSTLB] = 0x00001200;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2859,7 +2849,6 @@ static void init_excp_604 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_PERFM] = 0x00000F00;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->hreset_excp_prefix = 0xFFF00000UL;
/* Hardware reset vector */
env->hreset_vector = 0x00000100UL;
#endif
@ -2883,7 +2872,6 @@ static void init_excp_7x0 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001700;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2906,7 +2894,6 @@ static void init_excp_750cl (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_PERFM] = 0x00000F00;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2929,7 +2916,6 @@ static void init_excp_750cx (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_PERFM] = 0x00000F00;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001700;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2957,7 +2943,6 @@ static void init_excp_7x5 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001700;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -2983,7 +2968,6 @@ static void init_excp_7400 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_VPUA] = 0x00001600;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001700;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -3011,7 +2995,6 @@ static void init_excp_7450 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_VPUA] = 0x00001600;
env->hreset_excp_prefix = 0x00000000UL;
/* Hardware reset vector */
env->hreset_vector = 0xFFFFFFFCUL;
#endif
@ -3041,7 +3024,6 @@ static void init_excp_970 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_MAINT] = 0x00001600;
env->excp_vectors[POWERPC_EXCP_VPUA] = 0x00001700;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001800;
env->hreset_excp_prefix = 0x00000000FFF00000ULL;
/* Hardware reset vector */
env->hreset_vector = 0x0000000000000100ULL;
#endif
@ -3070,7 +3052,6 @@ static void init_excp_POWER7 (CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_MAINT] = 0x00001600;
env->excp_vectors[POWERPC_EXCP_VPUA] = 0x00001700;
env->excp_vectors[POWERPC_EXCP_THERM] = 0x00001800;
env->hreset_excp_prefix = 0;
/* Hardware reset vector */
env->hreset_vector = 0x0000000000000100ULL;
#endif
@ -7043,7 +7024,6 @@ static void init_ppc_proc(PowerPCCPU *cpu)
/* Set all exception vectors to an invalid address */
for (i = 0; i < POWERPC_EXCP_NB; i++)
env->excp_vectors[i] = (target_ulong)(-1ULL);
env->hreset_excp_prefix = 0x00000000;
env->ivor_mask = 0x00000000;
env->ivpr_mask = 0x00000000;
/* Default MMU definitions */
@ -7080,9 +7060,7 @@ static void init_ppc_proc(PowerPCCPU *cpu)
}
/* PowerPC implementation specific initialisations (SPRs, timers, ...) */
(*pcc->init_proc)(env);
#if !defined(CONFIG_USER_ONLY)
env->excp_prefix = env->hreset_excp_prefix;
#endif
/* MSR bits & flags consistency checks */
if (env->msr_mask & (1 << 25)) {
switch (env->flags & (POWERPC_FLAG_SPE | POWERPC_FLAG_VRE)) {
@ -8182,19 +8160,23 @@ static void ppc_cpu_reset(CPUState *s)
msr |= (target_ulong)1 << MSR_VR; /* Allow altivec usage */
msr |= (target_ulong)1 << MSR_SPE; /* Allow SPE usage */
msr |= (target_ulong)1 << MSR_PR;
#else
env->excp_prefix = env->hreset_excp_prefix;
env->nip = env->hreset_vector | env->excp_prefix;
if (env->mmu_model != POWERPC_MMU_REAL) {
ppc_tlb_invalidate_all(env);
}
#endif
env->msr = msr & env->msr_mask;
#if defined(TARGET_PPC64)
if (env->mmu_model & POWERPC_MMU_64) {
env->msr |= (1ULL << MSR_SF);
}
#endif
hreg_store_msr(env, msr, 1);
#if !defined(CONFIG_USER_ONLY)
env->nip = env->hreset_vector | env->excp_prefix;
if (env->mmu_model != POWERPC_MMU_REAL) {
ppc_tlb_invalidate_all(env);
}
#endif
hreg_compute_hflags(env);
env->reserve_addr = (target_ulong)-1ULL;
/* Be sure no exception or interrupt is pending */