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More interrupt reworking.

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--HG--
extra : convert_revision : 40dfbb72c4e418c54e909c54dad5fe6ef7017cb4
This commit is contained in:
Kevin Lim 2006-11-13 02:49:03 -05:00
parent 4c21fab575
commit 41a9196f60
2 changed files with 29 additions and 26 deletions
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3
src/cpu/o3/commit.hh
View file

@ -392,6 +392,9 @@ class DefaultCommit
*/
Tick trapLatency;
/** The interrupt fault. */
Fault interrupt;
/** The commit PC of each thread. Refers to the instruction that
* is currently being processed/committed.
*/

52
src/cpu/o3/commit_impl.hh
View file

@ -122,6 +122,9 @@ DefaultCommit<Impl>::DefaultCommit(Params *params)
tcSquash[i] = false;
PC[i] = nextPC[i] = nextNPC[i] = 0;
}
#if FULL_SYSTEM
interrupt = NoFault;
#endif
}
template <class Impl>
@ -635,28 +638,7 @@ DefaultCommit<Impl>::commit()
//////////////////////////////////////
#if FULL_SYSTEM
// Process interrupts if interrupts are enabled, not in PAL mode,
// and no other traps or external squashes are currently pending.
// @todo: Allow other threads to handle interrupts.
if (cpu->checkInterrupts &&
cpu->check_interrupts(cpu->tcBase(0)) &&
commitStatus[0] != TrapPending &&
!trapSquash[0] &&
!tcSquash[0]) {
// Get any interrupt that happened
Fault intr = cpu->getInterrupts();
// Exit this if block if there's no fault.
if (intr == NoFault) {
goto commit_insts;
}
// Tell fetch that there is an interrupt pending. This will
// make fetch wait until it sees a non PAL-mode PC, at which
// point it stops fetching instructions.
toIEW->commitInfo[0].interruptPending = true;
if (interrupt != NoFault) {
// Wait until the ROB is empty and all stores have drained in
// order to enter the interrupt.
if (rob->isEmpty() && !iewStage->hasStoresToWB()) {
@ -668,7 +650,7 @@ DefaultCommit<Impl>::commit()
thread[0]->inSyscall = true;
// CPU will handle interrupt.
cpu->processInterrupts(intr);
cpu->processInterrupts(interrupt);
thread[0]->inSyscall = false;
@ -677,15 +659,33 @@ DefaultCommit<Impl>::commit()
// Generate trap squash event.
generateTrapEvent(0);
// Clear the interrupt now that it's been handled
toIEW->commitInfo[0].clearInterrupt = true;
interrupt = NoFault;
} else {
DPRINTF(Commit, "Interrupt pending, waiting for ROB to empty.\n");
}
} else if (cpu->checkInterrupts &&
cpu->check_interrupts(cpu->tcBase(0)) &&
commitStatus[0] != TrapPending &&
!trapSquash[0] &&
!tcSquash[0]) {
// Process interrupts if interrupts are enabled, not in PAL
// mode, and no other traps or external squashes are currently
// pending.
// @todo: Allow other threads to handle interrupts.
// Get any interrupt that happened
interrupt = cpu->getInterrupts();
if (interrupt != NoFault) {
// Tell fetch that there is an interrupt pending. This
// will make fetch wait until it sees a non PAL-mode PC,
// at which point it stops fetching instructions.
toIEW->commitInfo[0].interruptPending = true;
}
}
// Label for goto. Not pretty but more readable than really big
// if statement above.
commit_insts:
#endif // FULL_SYSTEM
////////////////////////////////////