diff options
Diffstat (limited to 'target/openrisc')
| -rw-r--r-- | target/openrisc/interrupt.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/target/openrisc/interrupt.c b/target/openrisc/interrupt.c index 138ad17..bbae956 100644 --- a/target/openrisc/interrupt.c +++ b/target/openrisc/interrupt.c @@ -35,13 +35,6 @@ void openrisc_cpu_do_interrupt(CPUState *cs) int exception = cs->exception_index; env->epcr = env->pc; - if (env->dflag) { - env->dflag = 0; - env->sr |= SR_DSX; - env->epcr -= 4; - } else { - env->sr &= ~SR_DSX; - } if (exception == EXCP_SYSCALL) { env->epcr += 4; } @@ -51,7 +44,10 @@ void openrisc_cpu_do_interrupt(CPUState *cs) env->eear = env->pc; } + /* During exceptions esr is populared with the pre-exception sr. */ env->esr = cpu_get_sr(env); + /* In parallel sr is updated to disable mmu, interrupts, timers and + set the delay slot exception flag. */ env->sr &= ~SR_DME; env->sr &= ~SR_IME; env->sr |= SR_SM; @@ -61,6 +57,15 @@ void openrisc_cpu_do_interrupt(CPUState *cs) env->pmr &= ~PMR_SME; env->lock_addr = -1; + /* Set/clear dsx to indicate if we are in a delay slot exception. */ + if (env->dflag) { + env->dflag = 0; + env->sr |= SR_DSX; + env->epcr -= 4; + } else { + env->sr &= ~SR_DSX; + } + if (exception > 0 && exception < EXCP_NR) { static const char * const int_name[EXCP_NR] = { [EXCP_RESET] = "RESET", |