| Line 65... |
Line 65... |
}
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}
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|
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/* Actually handles exception */
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/* Actually handles exception */
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void except_handle_backend (int except, unsigned long ea, unsigned long pc_saved)
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void except_handle_backend (int except, unsigned long ea, unsigned long pc_saved)
|
{
|
{
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/* Ignore masked exceptions */
|
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if (! IS_NME(except) && (!(mfspr(SPR_SR) & SPR_SR_EXR))) {
|
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if (config.sim.verbose)
|
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printf("INFO: Exception occured while exception detection was disabled.\n");
|
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return;
|
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}
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|
|
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#if ONLY_VIRTUAL_MACHINE
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#if ONLY_VIRTUAL_MACHINE
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fprintf(stderr, "WARNING: No exception processing while ONLY_VIRTUAL_MACHINE is defined.\n");
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fprintf(stderr, "WARNING: No exception processing while ONLY_VIRTUAL_MACHINE is defined.\n");
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cont_run = 0;
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cont_run = 0;
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#else
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#else
|
|
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| Line 121... |
Line 114... |
mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_DME));
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mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_DME));
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mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_IME));
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mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_IME));
|
|
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mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_OVE); /* Disable overflow flag exception. */
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mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_OVE); /* Disable overflow flag exception. */
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|
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mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_SUPV); /* SUPV mode */
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mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_SM); /* SUPV mode */
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mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_EIR); /* Disable interrupts. */
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mtspr(SPR_SR, mfspr(SPR_SR) & ~(SPR_SR_IEE | SPR_SR_TEE)); /* Disable interrupts. */
|
|
|
clear_pending_exception ();
|
clear_pending_exception ();
|
|
|
pc = (unsigned long)except + (testsprbits (SPR_SR, SPR_SR_EP) ? 0xf0000000 : 0x00000000);
|
pc = (unsigned long)except + (testsprbits (SPR_SR, SPR_SR_EPH) ? 0xf0000000 : 0x00000000);
|
|
|
/* 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
|
clock cycle. We assume now that this function is being called
|
clock cycle. We assume now that this function is being called
|
