| Line 137... |
Line 137... |
if (! IS_NME(except) && (!(mfspr(SPR_SR) & SPR_SR_EXR))) {
|
if (! IS_NME(except) && (!(mfspr(SPR_SR) & SPR_SR_EXR))) {
|
if (config.sim.verbose)
|
if (config.sim.verbose)
|
printf("INFO: Exception occured while exception detection was disabled.\n");
|
printf("INFO: Exception occured while exception detection was disabled.\n");
|
return;
|
return;
|
}
|
}
|
pending.valid = 0;
|
|
pending.type = 0;
|
|
pending.address = 0;
|
|
pending.saved = 0;
|
|
|
|
#if ONLY_VIRTUAL_MACHINE
|
#if ONLY_VIRTUAL_MACHINE
|
fprintf(stderr, "WARNING: No exception processing while ONLY_VIRTUAL_MACHINE is defined.\n");
|
fprintf(stderr, "WARNING: No exception processing while ONLY_VIRTUAL_MACHINE is defined.\n");
|
cont_run = 0;
|
cont_run = 0;
|
#else
|
#else
|
| Line 161... |
Line 157... |
execute();
|
execute();
|
}
|
}
|
#endif
|
#endif
|
|
|
pc_saved = pc & ~0x3;
|
pc_saved = pc & ~0x3;
|
|
if (except == EXCEPT_ILLEGAL)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_ALIGN)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_DTLBMISS)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_DPF)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_BUSERR)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_TRAP)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else if (except == EXCEPT_RANGE)
|
|
mtspr(SPR_EPCR_BASE, pending.saved);
|
|
else
|
mtspr(SPR_EPCR_BASE, pc_saved);
|
mtspr(SPR_EPCR_BASE, pc_saved);
|
|
|
mtspr(SPR_EEAR_BASE, ea);
|
mtspr(SPR_EEAR_BASE, ea);
|
mtspr(SPR_ESR_BASE, mfspr(SPR_SR));
|
mtspr(SPR_ESR_BASE, mfspr(SPR_SR));
|
|
|
/* Address translation is always disabled when starting exception. */
|
/* Address translation is always disabled when starting exception. */
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_DME));
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_DME));
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_IME));
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_IME));
|
|
|
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_OVE); /* Disable overflow flag exception. */
|
|
|
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_SUPV); /* SUPV mode */
|
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_SUPV); /* SUPV mode */
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_EIR); /* Disable interrupts. */
|
mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_EIR); /* Disable interrupts. */
|
|
|
|
pending.valid = 0;
|
|
pending.type = 0;
|
|
pending.address = 0;
|
|
pending.saved = 0;
|
|
|
pc = (unsigned long)except;
|
pc = (unsigned long)except;
|
|
|
/* This has been removed. All exceptions (not just SYSCALL) suffer
|
/* This has been removed. All exceptions (not just SYSCALL) suffer
|
from the same problem. The solution is to continue just like
|
from the same problem. The solution is to continue just like
|
the pipeline would, and issue the exception on the next
|
the pipeline would, and issue the exception on the next
|
