diff options
| author | Scott Wood <scottwood@freescale.com> | 2012-12-21 16:15:41 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-01-07 17:37:10 +0100 |
| commit | a1bb73849fbd7d992b6ac2cf30c034244fb2299d (patch) | |
| tree | 4cfda2d8b0e6a53b5b34c386734147b5f693bbb8 /target-ppc | |
| parent | e99fd8af63a1692a1159cba8fa4943f2589adf97 (diff) | |
ppc/booke: fix crit/mcheck/debug exceptions
Book E does not play games with certain bits of xSRR1 being MSR save
bits and others being error status. xSRR1 is the old MSR, period.
This was causing things like MSR[CE] to be lost, even in the saved
version, as soon as you take an exception.
rfci/rfdi/rfmci are fixed to pass the actual xSRR1 register contents,
rather than the register number.
Put FIXME comments on the hack that is "asrr0/1". The whole point of
separate exception levels is so that you can, for example, take a machine
check or debug interrupt without corrupting critical-level operations.
The right xSRR0/1 set needs to be chosen based on CPU type flags.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/excp_helper.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/target-ppc/excp_helper.c b/target-ppc/excp_helper.c index 5e34ad08a8..41037a7e26 100644 --- a/target-ppc/excp_helper.c +++ b/target-ppc/excp_helper.c @@ -84,7 +84,11 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) " => %08x (%02x)\n", env->nip, excp, env->error_code); /* new srr1 value excluding must-be-zero bits */ - msr = env->msr & ~0x783f0000ULL; + if (excp_model == POWERPC_EXCP_BOOKE) { + msr = env->msr; + } else { + msr = env->msr & ~0x783f0000ULL; + } /* new interrupt handler msr */ new_msr = env->msr & ((target_ulong)1 << MSR_ME); @@ -145,6 +149,7 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) srr1 = SPR_40x_SRR3; break; case POWERPC_EXCP_BOOKE: + /* FIXME: choose one or the other based on CPU type */ srr0 = SPR_BOOKE_MCSRR0; srr1 = SPR_BOOKE_MCSRR1; asrr0 = SPR_BOOKE_CSRR0; @@ -275,6 +280,7 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) case POWERPC_EXCP_DEBUG: /* Debug interrupt */ switch (excp_model) { case POWERPC_EXCP_BOOKE: + /* FIXME: choose one or the other based on CPU type */ srr0 = SPR_BOOKE_DSRR0; srr1 = SPR_BOOKE_DSRR1; asrr0 = SPR_BOOKE_CSRR0; @@ -836,8 +842,13 @@ static inline void do_rfi(CPUPPCState *env, target_ulong nip, target_ulong msr, void helper_rfi(CPUPPCState *env) { - do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1], - ~((target_ulong)0x783F0000), 1); + if (env->excp_model == POWERPC_EXCP_BOOKE) { + do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1], + ~((target_ulong)0), 0); + } else { + do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1], + ~((target_ulong)0x783F0000), 1); + } } #if defined(TARGET_PPC64) @@ -864,20 +875,22 @@ void helper_40x_rfci(CPUPPCState *env) void helper_rfci(CPUPPCState *env) { - do_rfi(env, env->spr[SPR_BOOKE_CSRR0], SPR_BOOKE_CSRR1, - ~((target_ulong)0x3FFF0000), 0); + do_rfi(env, env->spr[SPR_BOOKE_CSRR0], env->spr[SPR_BOOKE_CSRR1], + ~((target_ulong)0), 0); } void helper_rfdi(CPUPPCState *env) { - do_rfi(env, env->spr[SPR_BOOKE_DSRR0], SPR_BOOKE_DSRR1, - ~((target_ulong)0x3FFF0000), 0); + /* FIXME: choose CSRR1 or DSRR1 based on cpu type */ + do_rfi(env, env->spr[SPR_BOOKE_DSRR0], env->spr[SPR_BOOKE_DSRR1], + ~((target_ulong)0), 0); } void helper_rfmci(CPUPPCState *env) { - do_rfi(env, env->spr[SPR_BOOKE_MCSRR0], SPR_BOOKE_MCSRR1, - ~((target_ulong)0x3FFF0000), 0); + /* FIXME: choose CSRR1 or MCSRR1 based on cpu type */ + do_rfi(env, env->spr[SPR_BOOKE_MCSRR0], env->spr[SPR_BOOKE_MCSRR1], + ~((target_ulong)0), 0); } #endif |