diff options
Diffstat (limited to 'target-microblaze/helper.c')
| -rw-r--r-- | target-microblaze/helper.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target-microblaze/helper.c b/target-microblaze/helper.c index 7fbb5ddbf..40d27b956 100644 --- a/target-microblaze/helper.c +++ b/target-microblaze/helper.c @@ -126,6 +126,37 @@ void do_interrupt(CPUState *env) assert(!(env->iflags & (DRTI_FLAG | DRTE_FLAG | DRTB_FLAG))); /* assert(env->sregs[SR_MSR] & (MSR_EE)); Only for HW exceptions. */ switch (env->exception_index) { + case EXCP_HW_EXCP: + if (!(env->pvr.regs[0] & PVR0_USE_EXC_MASK)) { + qemu_log("Exception raised on system without exceptions!\n"); + return; + } + + env->regs[17] = env->sregs[SR_PC] + 4; + env->sregs[SR_ESR] &= ~(1 << 12); + + /* Exception breaks branch + dslot sequence? */ + if (env->iflags & D_FLAG) { + env->sregs[SR_ESR] |= 1 << 12 ; + env->sregs[SR_BTR] = env->btarget; + } + + /* Disable the MMU. */ + t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1; + env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM); + env->sregs[SR_MSR] |= t; + /* Exception in progress. */ + env->sregs[SR_MSR] |= MSR_EIP; + + qemu_log_mask(CPU_LOG_INT, + "hw exception at pc=%x ear=%x esr=%x iflags=%x\n", + env->sregs[SR_PC], env->sregs[SR_EAR], + env->sregs[SR_ESR], env->iflags); + log_cpu_state_mask(CPU_LOG_INT, env, 0); + env->iflags &= ~(IMM_FLAG | D_FLAG); + env->sregs[SR_PC] = 0x20; + break; + case EXCP_MMU: env->regs[17] = env->sregs[SR_PC]; |