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target-sparc: Split cpu_put_psr into side-effect and no-side-effect parts 

For inbound migration we really want to be able to set the PSR without
having any side effects, but cpu_put_psr() calls cpu_check_irqs() which
might try to deliver CPU interrupts. Split cpu_put_psr() into the
no-side-effect and side-effect parts.

This includes reordering the cpu_check_irqs() to the end of cpu_put_psr(),
because that function may actually end up calling cpu_interrupt(), which
does not seem like a good thing to happen in the middle of updating the PSR.

Suggested-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Peter Maydell 2016-01-11 12:40:24 +00:00 committed by Mark Cave-Ayland
parent 365162f7c0
commit 4552a09dd4
2 changed files with 13 additions and 7 deletions
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1
target-sparc/cpu.h
View File

@ -539,6 +539,7 @@ int cpu_sparc_exec(CPUState *cpu);
/* win_helper.c */
target_ulong cpu_get_psr(CPUSPARCState *env1);
void cpu_put_psr(CPUSPARCState *env1, target_ulong val);
void cpu_put_psr_raw(CPUSPARCState *env1, target_ulong val);
#ifdef TARGET_SPARC64
target_ulong cpu_get_ccr(CPUSPARCState *env1);
void cpu_put_ccr(CPUSPARCState *env1, target_ulong val);

19
target-sparc/win_helper.c
View File

@ -64,23 +64,28 @@ target_ulong cpu_get_psr(CPUSPARCState *env)
#endif
}
void cpu_put_psr(CPUSPARCState *env, target_ulong val)
void cpu_put_psr_raw(CPUSPARCState *env, target_ulong val)
{
env->psr = val & PSR_ICC;
#if !defined(TARGET_SPARC64)
env->psref = (val & PSR_EF) ? 1 : 0;
env->psrpil = (val & PSR_PIL) >> 8;
#endif
#if ((!defined(TARGET_SPARC64)) && !defined(CONFIG_USER_ONLY))
cpu_check_irqs(env);
#endif
#if !defined(TARGET_SPARC64)
env->psrs = (val & PSR_S) ? 1 : 0;
env->psrps = (val & PSR_PS) ? 1 : 0;
env->psret = (val & PSR_ET) ? 1 : 0;
cpu_set_cwp(env, val & PSR_CWP);
#endif
env->cc_op = CC_OP_FLAGS;
#if !defined(TARGET_SPARC64)
cpu_set_cwp(env, val & PSR_CWP);
#endif
}
void cpu_put_psr(CPUSPARCState *env, target_ulong val)
{
cpu_put_psr_raw(env, val);
#if ((!defined(TARGET_SPARC64)) && !defined(CONFIG_USER_ONLY))
cpu_check_irqs(env);
#endif
}
int cpu_cwp_inc(CPUSPARCState *env, int cwp)