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inorder: stall signal handling

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remove stall only when necessary
add debugging printfs
This commit is contained in:
Korey Sewell 2010-06-23 18:15:23 -04:00
parent 7695d4c63f
commit 39ac4dce04
1 changed files with 19 additions and 3 deletions
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22
src/cpu/inorder/pipeline_stage.cc
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@ -233,8 +233,21 @@ PipelineStage::checkStall(ThreadID tid) const
void
PipelineStage::removeStalls(ThreadID tid)
{
for (int stNum = 0; stNum < NumStages; stNum++) {
stalls[tid].stage[stNum] = false;
for (int st_num = 0; st_num < NumStages; st_num++) {
if (stalls[tid].stage[st_num] == true) {
DPRINTF(InOrderStage, "Removing stall from stage %i.\n", st_num);
stalls[tid].stage[st_num] = false;
}
if (toPrevStages->stageBlock[st_num][tid] == true) {
DPRINTF(InOrderStage, "Removing pending block from stage %i.\n", st_num);
toPrevStages->stageBlock[st_num][tid] = false;
}
if (fromNextStages->stageBlock[st_num][tid] == true) {
DPRINTF(InOrderStage, "Removing pending block from stage %i.\n", st_num);
fromNextStages->stageBlock[st_num][tid] = false;
}
}
stalls[tid].resources.clear();
}
@ -626,12 +639,15 @@ PipelineStage::readStallSignals(ThreadID tid)
// Check for Stage Blocking Signal
if (fromNextStages->stageBlock[stage_idx][tid]) {
DPRINTF(InOrderStage, "[tid:%i] Stall from stage %i set.\n", tid,
stage_idx);
stalls[tid].stage[stage_idx] = true;
}
// Check for Stage Unblocking Signal
if (fromNextStages->stageUnblock[stage_idx][tid]) {
//assert(fromNextStages->stageBlock[stage_idx][tid]);
DPRINTF(InOrderStage, "[tid:%i] Stall from stage %i unset.\n", tid,
stage_idx);
stalls[tid].stage[stage_idx] = false;
}
}