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Diffstat (limited to 'cpu/ozone/lw_lsq_impl.hh')
| -rw-r--r-- | cpu/ozone/lw_lsq_impl.hh | 874 |
1 files changed, 0 insertions, 874 deletions
diff --git a/cpu/ozone/lw_lsq_impl.hh b/cpu/ozone/lw_lsq_impl.hh deleted file mode 100644 index f72bbb1cc..000000000 --- a/cpu/ozone/lw_lsq_impl.hh +++ /dev/null @@ -1,874 +0,0 @@ -/* - * Copyright (c) 2004-2006 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "arch/isa_traits.hh" -#include "base/str.hh" -#include "cpu/ozone/lw_lsq.hh" -#include "cpu/checker/cpu.hh" - -template <class Impl> -OzoneLWLSQ<Impl>::StoreCompletionEvent::StoreCompletionEvent(DynInstPtr &_inst, - BackEnd *_be, - Event *wb_event, - OzoneLWLSQ<Impl> *lsq_ptr) - : Event(&mainEventQueue), - inst(_inst), - be(_be), - wbEvent(wb_event), - miss(false), - lsqPtr(lsq_ptr) -{ - this->setFlags(Event::AutoDelete); -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::StoreCompletionEvent::process() -{ - DPRINTF(OzoneLSQ, "Cache miss complete for store [sn:%lli]\n", - inst->seqNum); - - //lsqPtr->removeMSHR(lsqPtr->storeQueue[storeIdx].inst->seqNum); - -// lsqPtr->cpu->wakeCPU(); - if (lsqPtr->isSwitchedOut()) { - if (wbEvent) - delete wbEvent; - - return; - } - - if (wbEvent) { - wbEvent->process(); - delete wbEvent; - } - - lsqPtr->completeStore(inst->sqIdx); - if (miss) - be->removeDcacheMiss(inst); -} - -template <class Impl> -const char * -OzoneLWLSQ<Impl>::StoreCompletionEvent::description() -{ - return "LSQ store completion event"; -} - -template <class Impl> -OzoneLWLSQ<Impl>::OzoneLWLSQ() - : loads(0), stores(0), storesToWB(0), stalled(false), isLoadBlocked(false), - loadBlockedHandled(false) -{ -} - -template<class Impl> -void -OzoneLWLSQ<Impl>::init(Params *params, unsigned maxLQEntries, - unsigned maxSQEntries, unsigned id) -{ - DPRINTF(OzoneLSQ, "Creating OzoneLWLSQ%i object.\n",id); - - lsqID = id; - - LQEntries = maxLQEntries; - SQEntries = maxSQEntries; - - for (int i = 0; i < LQEntries * 2; i++) { - LQIndices.push(i); - SQIndices.push(i); - } - - usedPorts = 0; - cachePorts = params->cachePorts; - - dcacheInterface = params->dcacheInterface; - - loadFaultInst = storeFaultInst = memDepViolator = NULL; - - blockedLoadSeqNum = 0; -} - -template<class Impl> -std::string -OzoneLWLSQ<Impl>::name() const -{ - return "lsqunit"; -} - -template<class Impl> -void -OzoneLWLSQ<Impl>::clearLQ() -{ - loadQueue.clear(); -} - -template<class Impl> -void -OzoneLWLSQ<Impl>::clearSQ() -{ - storeQueue.clear(); -} -/* -template<class Impl> -void -OzoneLWLSQ<Impl>::setPageTable(PageTable *pt_ptr) -{ - DPRINTF(OzoneLSQ, "Setting the page table pointer.\n"); - pTable = pt_ptr; -} -*/ -template<class Impl> -void -OzoneLWLSQ<Impl>::resizeLQ(unsigned size) -{ - assert( size >= LQEntries); - - if (size > LQEntries) { - while (size > loadQueue.size()) { - DynInstPtr dummy; - loadQueue.push_back(dummy); - LQEntries++; - } - } else { - LQEntries = size; - } - -} - -template<class Impl> -void -OzoneLWLSQ<Impl>::resizeSQ(unsigned size) -{ - if (size > SQEntries) { - while (size > storeQueue.size()) { - SQEntry dummy; - storeQueue.push_back(dummy); - SQEntries++; - } - } else { - SQEntries = size; - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::insert(DynInstPtr &inst) -{ - // Make sure we really have a memory reference. - assert(inst->isMemRef()); - - // Make sure it's one of the two classes of memory references. - assert(inst->isLoad() || inst->isStore()); - - if (inst->isLoad()) { - insertLoad(inst); - } else { - insertStore(inst); - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::insertLoad(DynInstPtr &load_inst) -{ - assert(loads < LQEntries * 2); - assert(!LQIndices.empty()); - int load_index = LQIndices.front(); - LQIndices.pop(); - - DPRINTF(OzoneLSQ, "Inserting load PC %#x, idx:%i [sn:%lli]\n", - load_inst->readPC(), load_index, load_inst->seqNum); - - load_inst->lqIdx = load_index; - - loadQueue.push_front(load_inst); - LQItHash[load_index] = loadQueue.begin(); - - ++loads; -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::insertStore(DynInstPtr &store_inst) -{ - // Make sure it is not full before inserting an instruction. - assert(stores - storesToWB < SQEntries); - - assert(!SQIndices.empty()); - int store_index = SQIndices.front(); - SQIndices.pop(); - - DPRINTF(OzoneLSQ, "Inserting store PC %#x, idx:%i [sn:%lli]\n", - store_inst->readPC(), store_index, store_inst->seqNum); - - store_inst->sqIdx = store_index; - SQEntry entry(store_inst); - if (loadQueue.empty()) { - entry.lqIt = loadQueue.end(); - } else { - entry.lqIt = loadQueue.begin(); - } - storeQueue.push_front(entry); - - SQItHash[store_index] = storeQueue.begin(); - - ++stores; -} - -template <class Impl> -typename Impl::DynInstPtr -OzoneLWLSQ<Impl>::getMemDepViolator() -{ - DynInstPtr temp = memDepViolator; - - memDepViolator = NULL; - - return temp; -} - -template <class Impl> -unsigned -OzoneLWLSQ<Impl>::numFreeEntries() -{ - unsigned free_lq_entries = LQEntries - loads; - unsigned free_sq_entries = SQEntries - stores; - - // Both the LQ and SQ entries have an extra dummy entry to differentiate - // empty/full conditions. Subtract 1 from the free entries. - if (free_lq_entries < free_sq_entries) { - return free_lq_entries - 1; - } else { - return free_sq_entries - 1; - } -} - -template <class Impl> -int -OzoneLWLSQ<Impl>::numLoadsReady() -{ - int retval = 0; - LQIt lq_it = loadQueue.begin(); - LQIt end_it = loadQueue.end(); - - while (lq_it != end_it) { - if ((*lq_it)->readyToIssue()) { - ++retval; - } - } - - return retval; -} - -template <class Impl> -Fault -OzoneLWLSQ<Impl>::executeLoad(DynInstPtr &inst) -{ - // Execute a specific load. - Fault load_fault = NoFault; - - DPRINTF(OzoneLSQ, "Executing load PC %#x, [sn:%lli]\n", - inst->readPC(),inst->seqNum); - - // Make sure it's really in the list. - // Normally it should always be in the list. However, - /* due to a syscall it may not be the list. -#ifdef DEBUG - int i = loadHead; - while (1) { - if (i == loadTail && !find(inst)) { - assert(0 && "Load not in the queue!"); - } else if (loadQueue[i] == inst) { - break; - } - - i = i + 1; - if (i >= LQEntries) { - i = 0; - } - } -#endif // DEBUG*/ - - load_fault = inst->initiateAcc(); - - // Might want to make sure that I'm not overwriting a previously faulting - // instruction that hasn't been checked yet. - // Actually probably want the oldest faulting load - if (load_fault != NoFault) { - DPRINTF(OzoneLSQ, "Load [sn:%lli] has a fault\n", inst->seqNum); - // Maybe just set it as can commit here, although that might cause - // some other problems with sending traps to the ROB too quickly. - be->instToCommit(inst); -// iewStage->activityThisCycle(); - } - - return load_fault; -} - -template <class Impl> -Fault -OzoneLWLSQ<Impl>::executeStore(DynInstPtr &store_inst) -{ - // Make sure that a store exists. - assert(stores != 0); - - int store_idx = store_inst->sqIdx; - SQHashIt sq_hash_it = SQItHash.find(store_idx); - assert(sq_hash_it != SQItHash.end()); - DPRINTF(OzoneLSQ, "Executing store PC %#x [sn:%lli]\n", - store_inst->readPC(), store_inst->seqNum); - - SQIt sq_it = (*sq_hash_it).second; - - Fault store_fault = store_inst->initiateAcc(); - - // Store size should now be available. Use it to get proper offset for - // addr comparisons. - int size = (*sq_it).size; - - if (size == 0) { - DPRINTF(OzoneLSQ,"Fault on Store PC %#x, [sn:%lli],Size = 0\n", - store_inst->readPC(),store_inst->seqNum); - - return store_fault; - } - - assert(store_fault == NoFault); - - if (!storeFaultInst) { - if (store_fault != NoFault) { - panic("Fault in a store instruction!"); - storeFaultInst = store_inst; - } else if (store_inst->isStoreConditional()) { - // Store conditionals need to set themselves as able to - // writeback if we haven't had a fault by here. - (*sq_it).canWB = true; - - ++storesToWB; - DPRINTF(OzoneLSQ, "Nonspeculative store! storesToWB:%i\n", - storesToWB); - } - } - - LQIt lq_it = --(loadQueue.end()); - - if (!memDepViolator) { - while (lq_it != loadQueue.end()) { - if ((*lq_it)->seqNum < store_inst->seqNum) { - lq_it--; - continue; - } - // Actually should only check loads that have actually executed - // Might be safe because effAddr is set to InvalAddr when the - // dyn inst is created. - - // Must actually check all addrs in the proper size range - // Which is more correct than needs to be. What if for now we just - // assume all loads are quad-word loads, and do the addr based - // on that. - // @todo: Fix this, magic number being used here - if (((*lq_it)->effAddr >> 8) == - (store_inst->effAddr >> 8)) { - // A load incorrectly passed this store. Squash and refetch. - // For now return a fault to show that it was unsuccessful. - memDepViolator = (*lq_it); - - return TheISA::genMachineCheckFault(); - } - - lq_it--; - } - - // If we've reached this point, there was no violation. - memDepViolator = NULL; - } - - return store_fault; -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::commitLoad() -{ - assert(!loadQueue.empty()); - - DPRINTF(OzoneLSQ, "[sn:%lli] Committing head load instruction, PC %#x\n", - loadQueue.back()->seqNum, loadQueue.back()->readPC()); - - LQIndices.push(loadQueue.back()->lqIdx); - LQItHash.erase(loadQueue.back()->lqIdx); - - loadQueue.pop_back(); - - --loads; -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::commitLoads(InstSeqNum &youngest_inst) -{ - assert(loads == 0 || !loadQueue.empty()); - - while (loads != 0 && - loadQueue.back()->seqNum <= youngest_inst) { - commitLoad(); - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::commitStores(InstSeqNum &youngest_inst) -{ - assert(stores == 0 || !storeQueue.empty()); - - SQIt sq_it = --(storeQueue.end()); - while (!storeQueue.empty() && sq_it != storeQueue.end()) { - assert((*sq_it).inst); - if (!(*sq_it).canWB) { - if ((*sq_it).inst->seqNum > youngest_inst) { - break; - } - ++storesToWB; - - DPRINTF(OzoneLSQ, "Marking store as able to write back, PC " - "%#x [sn:%lli], storesToWB:%i\n", - (*sq_it).inst->readPC(), - (*sq_it).inst->seqNum, - storesToWB); - - (*sq_it).canWB = true; - } - - sq_it--; - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::writebackStores() -{ - SQIt sq_it = --(storeQueue.end()); - while (storesToWB > 0 && - sq_it != storeQueue.end() && - (*sq_it).inst && - (*sq_it).canWB && - usedPorts < cachePorts) { - - DynInstPtr inst = (*sq_it).inst; - - if ((*sq_it).size == 0 && !(*sq_it).completed) { - sq_it--; - completeStore(inst->sqIdx); - - continue; - } - - if (inst->isDataPrefetch() || (*sq_it).committed) { - sq_it--; - continue; - } - - if (dcacheInterface && dcacheInterface->isBlocked()) { - DPRINTF(OzoneLSQ, "Unable to write back any more stores, cache" - " is blocked!\n"); - break; - } - - ++usedPorts; - - assert((*sq_it).req); - assert(!(*sq_it).committed); - - (*sq_it).committed = true; - - MemReqPtr req = (*sq_it).req; - - req->cmd = Write; - req->completionEvent = NULL; - req->time = curTick; - - switch((*sq_it).size) { - case 1: - cpu->write(req, (uint8_t &)(*sq_it).data); - break; - case 2: - cpu->write(req, (uint16_t &)(*sq_it).data); - break; - case 4: - cpu->write(req, (uint32_t &)(*sq_it).data); - break; - case 8: - cpu->write(req, (uint64_t &)(*sq_it).data); - break; - default: - panic("Unexpected store size!\n"); - } - if (!(req->flags & LOCKED)) { - (*sq_it).inst->setCompleted(); - if (cpu->checker) { - cpu->checker->tick((*sq_it).inst); - } - } - - DPRINTF(OzoneLSQ, "D-Cache: Writing back store idx:%i PC:%#x " - "to Addr:%#x, data:%#x [sn:%lli]\n", - inst->sqIdx,inst->readPC(), - req->paddr, *(req->data), - inst->seqNum); - - if (dcacheInterface) { - assert(!req->completionEvent); - StoreCompletionEvent *store_event = new - StoreCompletionEvent(inst, be, NULL, this); - req->completionEvent = store_event; - - MemAccessResult result = dcacheInterface->access(req); - - if (isStalled() && - inst->seqNum == stallingStoreIsn) { - DPRINTF(OzoneLSQ, "Unstalling, stalling store [sn:%lli] " - "load [sn:%lli]\n", - stallingStoreIsn, (*stallingLoad)->seqNum); - stalled = false; - stallingStoreIsn = 0; - be->replayMemInst((*stallingLoad)); - } - - if (result != MA_HIT && dcacheInterface->doEvents()) { - store_event->miss = true; - typename BackEnd::LdWritebackEvent *wb = NULL; - if (req->flags & LOCKED) { - wb = new typename BackEnd::LdWritebackEvent(inst, - be); - store_event->wbEvent = wb; - } - - DPRINTF(OzoneLSQ,"D-Cache Write Miss!\n"); - -// DPRINTF(Activity, "Active st accessing mem miss [sn:%lli]\n", -// inst->seqNum); - - be->addDcacheMiss(inst); - - lastDcacheStall = curTick; - - _status = DcacheMissStall; - - // Increment stat here or something - - sq_it--; - } else { - DPRINTF(OzoneLSQ,"D-Cache: Write Hit on idx:%i !\n", - inst->sqIdx); - -// DPRINTF(Activity, "Active st accessing mem hit [sn:%lli]\n", -// inst->seqNum); - - if (req->flags & LOCKED) { - // Stx_C does not generate a system port - // transaction in the 21264, but that might be - // hard to accomplish in this model. - - typename BackEnd::LdWritebackEvent *wb = - new typename BackEnd::LdWritebackEvent(inst, - be); - store_event->wbEvent = wb; - } - sq_it--; - } - } else { - panic("Must HAVE DCACHE!!!!!\n"); - } - } - - // Not sure this should set it to 0. - usedPorts = 0; - - assert(stores >= 0 && storesToWB >= 0); -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::squash(const InstSeqNum &squashed_num) -{ - DPRINTF(OzoneLSQ, "Squashing until [sn:%lli]!" - "(Loads:%i Stores:%i)\n",squashed_num,loads,stores); - - - LQIt lq_it = loadQueue.begin(); - - while (loads != 0 && (*lq_it)->seqNum > squashed_num) { - assert(!loadQueue.empty()); - // Clear the smart pointer to make sure it is decremented. - DPRINTF(OzoneLSQ,"Load Instruction PC %#x squashed, " - "[sn:%lli]\n", - (*lq_it)->readPC(), - (*lq_it)->seqNum); - - if (isStalled() && lq_it == stallingLoad) { - stalled = false; - stallingStoreIsn = 0; - stallingLoad = NULL; - } - - --loads; - - // Inefficient! - LQHashIt lq_hash_it = LQItHash.find((*lq_it)->lqIdx); - assert(lq_hash_it != LQItHash.end()); - LQItHash.erase(lq_hash_it); - LQIndices.push((*lq_it)->lqIdx); - loadQueue.erase(lq_it++); - } - - if (isLoadBlocked) { - if (squashed_num < blockedLoadSeqNum) { - isLoadBlocked = false; - loadBlockedHandled = false; - blockedLoadSeqNum = 0; - } - } - - SQIt sq_it = storeQueue.begin(); - - while (stores != 0 && (*sq_it).inst->seqNum > squashed_num) { - assert(!storeQueue.empty()); - - if ((*sq_it).canWB) { - break; - } - - // Clear the smart pointer to make sure it is decremented. - DPRINTF(OzoneLSQ,"Store Instruction PC %#x idx:%i squashed [sn:%lli]\n", - (*sq_it).inst->readPC(), (*sq_it).inst->sqIdx, - (*sq_it).inst->seqNum); - - // I don't think this can happen. It should have been cleared by the - // stalling load. - if (isStalled() && - (*sq_it).inst->seqNum == stallingStoreIsn) { - panic("Is stalled should have been cleared by stalling load!\n"); - stalled = false; - stallingStoreIsn = 0; - } - - SQHashIt sq_hash_it = SQItHash.find((*sq_it).inst->sqIdx); - assert(sq_hash_it != SQItHash.end()); - SQItHash.erase(sq_hash_it); - SQIndices.push((*sq_it).inst->sqIdx); - (*sq_it).inst = NULL; - (*sq_it).canWB = 0; - - if ((*sq_it).req) { - assert(!(*sq_it).req->completionEvent); - } - (*sq_it).req = NULL; - --stores; - storeQueue.erase(sq_it++); - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::dumpInsts() -{ - cprintf("Load store queue: Dumping instructions.\n"); - cprintf("Load queue size: %i\n", loads); - cprintf("Load queue: "); - - LQIt lq_it = --(loadQueue.end()); - - while (lq_it != loadQueue.end() && (*lq_it)) { - cprintf("[sn:%lli] %#x ", (*lq_it)->seqNum, - (*lq_it)->readPC()); - - lq_it--; - } - - cprintf("\nStore queue size: %i\n", stores); - cprintf("Store queue: "); - - SQIt sq_it = --(storeQueue.end()); - - while (sq_it != storeQueue.end() && (*sq_it).inst) { - cprintf("[sn:%lli]\nPC:%#x\nSize:%i\nCommitted:%i\nCompleted:%i\ncanWB:%i\n", - (*sq_it).inst->seqNum, - (*sq_it).inst->readPC(), - (*sq_it).size, - (*sq_it).committed, - (*sq_it).completed, - (*sq_it).canWB); - - sq_it--; - } - - cprintf("\n"); -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::completeStore(int store_idx) -{ - SQHashIt sq_hash_it = SQItHash.find(store_idx); - assert(sq_hash_it != SQItHash.end()); - SQIt sq_it = (*sq_hash_it).second; - - assert((*sq_it).inst); - (*sq_it).completed = true; - DynInstPtr inst = (*sq_it).inst; - - --storesToWB; - - if (isStalled() && - inst->seqNum == stallingStoreIsn) { - DPRINTF(OzoneLSQ, "Unstalling, stalling store [sn:%lli] " - "load [sn:%lli]\n", - stallingStoreIsn, (*stallingLoad)->seqNum); - stalled = false; - stallingStoreIsn = 0; - be->replayMemInst((*stallingLoad)); - } - - DPRINTF(OzoneLSQ, "Completing store idx:%i [sn:%lli], storesToWB:%i\n", - inst->sqIdx, inst->seqNum, storesToWB); - - assert(!storeQueue.empty()); - SQItHash.erase(sq_hash_it); - SQIndices.push(inst->sqIdx); - storeQueue.erase(sq_it); - --stores; - - inst->setCompleted(); - if (cpu->checker) { - cpu->checker->tick(inst); - } -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::switchOut() -{ - assert(storesToWB == 0); - switchedOut = true; - SQIt sq_it = --(storeQueue.end()); - while (storesToWB > 0 && - sq_it != storeQueue.end() && - (*sq_it).inst && - (*sq_it).canWB) { - - DynInstPtr inst = (*sq_it).inst; - - if ((*sq_it).size == 0 && !(*sq_it).completed) { - sq_it--; - continue; - } - - // Store conditionals don't complete until *after* they have written - // back. If it's here and not yet sent to memory, then don't bother - // as it's not part of committed state. - if (inst->isDataPrefetch() || (*sq_it).committed) { - sq_it--; - continue; - } else if ((*sq_it).req->flags & LOCKED) { - sq_it--; - assert(!(*sq_it).canWB || - ((*sq_it).canWB && (*sq_it).req->flags & LOCKED)); - continue; - } - - assert((*sq_it).req); - assert(!(*sq_it).committed); - - MemReqPtr req = (*sq_it).req; - (*sq_it).committed = true; - - req->cmd = Write; - req->completionEvent = NULL; - req->time = curTick; - assert(!req->data); - req->data = new uint8_t[64]; - memcpy(req->data, (uint8_t *)&(*sq_it).data, req->size); - - DPRINTF(OzoneLSQ, "Switching out : Writing back store idx:%i PC:%#x " - "to Addr:%#x, data:%#x directly to memory [sn:%lli]\n", - inst->sqIdx,inst->readPC(), - req->paddr, *(req->data), - inst->seqNum); - - switch((*sq_it).size) { - case 1: - cpu->write(req, (uint8_t &)(*sq_it).data); - break; - case 2: - cpu->write(req, (uint16_t &)(*sq_it).data); - break; - case 4: - cpu->write(req, (uint32_t &)(*sq_it).data); - break; - case 8: - cpu->write(req, (uint64_t &)(*sq_it).data); - break; - default: - panic("Unexpected store size!\n"); - } - } - - // Clear the queue to free up resources - storeQueue.clear(); - loadQueue.clear(); - loads = stores = storesToWB = 0; -} - -template <class Impl> -void -OzoneLWLSQ<Impl>::takeOverFrom(ExecContext *old_xc) -{ - // Clear out any old state. May be redundant if this is the first time - // the CPU is being used. - stalled = false; - isLoadBlocked = false; - loadBlockedHandled = false; - switchedOut = false; - - // Could do simple checks here to see if indices are on twice - while (!LQIndices.empty()) - LQIndices.pop(); - while (!SQIndices.empty()) - SQIndices.pop(); - - for (int i = 0; i < LQEntries * 2; i++) { - LQIndices.push(i); - SQIndices.push(i); - } - - usedPorts = 0; - - loadFaultInst = storeFaultInst = memDepViolator = NULL; - - blockedLoadSeqNum = 0; -} |