summaryrefslogtreecommitdiff
path: root/src/mem/cache/miss/blocking_buffer.cc
diff options
context:
space:
mode:
Diffstat (limited to 'src/mem/cache/miss/blocking_buffer.cc')
-rw-r--r--src/mem/cache/miss/blocking_buffer.cc245
1 files changed, 0 insertions, 245 deletions
diff --git a/src/mem/cache/miss/blocking_buffer.cc b/src/mem/cache/miss/blocking_buffer.cc
deleted file mode 100644
index e8ff26880..000000000
--- a/src/mem/cache/miss/blocking_buffer.cc
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- * Copyright (c) 2003-2005 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.
- *
- * Authors: Erik Hallnor
- */
-
-/**
- * @file
- * Definitions of a simple buffer for a blocking cache.
- */
-#include <cstring>
-
-#include "mem/cache/base_cache.hh"
-#include "mem/cache/miss/blocking_buffer.hh"
-#include "mem/cache/prefetch/base_prefetcher.hh"
-#include "mem/request.hh"
-
-/**
- * @todo Move writebacks into shared BaseBuffer class.
- */
-void
-BlockingBuffer::regStats(const std::string &name)
-{
- MissBuffer::regStats(name);
-}
-
-
-void
-BlockingBuffer::handleMiss(PacketPtr &pkt, int blk_size, Tick time)
-{
- Addr blk_addr = pkt->getAddr() & ~(Addr)(blk_size - 1);
- if (pkt->isWrite() && (pkt->req->isUncacheable() || !writeAllocate ||
- !pkt->needsResponse())) {
- if (!pkt->needsResponse()) {
- wb.allocateAsBuffer(pkt);
- } else {
- wb.allocate(pkt->cmd, blk_addr, blk_size, pkt);
- }
-
- std::memcpy(wb.pkt->getPtr<uint8_t>(), pkt->getPtr<uint8_t>(), blk_size);
-
- cache->setBlocked(Blocked_NoWBBuffers);
- cache->setMasterRequest(Request_WB, time);
- return;
- }
-
- if (!pkt->needsResponse()) {
- miss.allocateAsBuffer(pkt);
- } else {
- miss.allocate(pkt->cmd, blk_addr, blk_size, pkt);
- }
- if (!pkt->req->isUncacheable()) {
- miss.pkt->flags |= CACHE_LINE_FILL;
- }
- cache->setBlocked(Blocked_NoMSHRs);
- cache->setMasterRequest(Request_MSHR, time);
-}
-
-PacketPtr
-BlockingBuffer::getPacket()
-{
- if (miss.pkt && !miss.inService) {
- return miss.pkt;
- }
- return wb.pkt;
-}
-
-void
-BlockingBuffer::setBusCmd(PacketPtr &pkt, MemCmd cmd)
-{
- MSHR *mshr = (MSHR*) pkt->senderState;
- mshr->originalCmd = pkt->cmd;
- if (pkt->isCacheFill())
- pkt->cmdOverride(cmd);
-}
-
-void
-BlockingBuffer::restoreOrigCmd(PacketPtr &pkt)
-{
- pkt->cmdOverride(((MSHR*)(pkt->senderState))->originalCmd);
-}
-
-void
-BlockingBuffer::markInService(PacketPtr &pkt, MSHR* mshr)
-{
- if (!pkt->isCacheFill() && pkt->isWrite()) {
- // Forwarding a write/ writeback, don't need to change
- // the command
- assert(mshr == &wb);
- cache->clearMasterRequest(Request_WB);
- if (!pkt->needsResponse()) {
- assert(wb.getNumTargets() == 0);
- wb.deallocate();
- cache->clearBlocked(Blocked_NoWBBuffers);
- } else {
- wb.inService = true;
- }
- } else {
- assert(mshr == &miss);
- cache->clearMasterRequest(Request_MSHR);
- if (!pkt->needsResponse()) {
- assert(miss.getNumTargets() == 0);
- miss.deallocate();
- cache->clearBlocked(Blocked_NoMSHRs);
- } else {
- //mark in service
- miss.inService = true;
- }
- }
-}
-
-void
-BlockingBuffer::handleResponse(PacketPtr &pkt, Tick time)
-{
- if (pkt->isCacheFill()) {
- // targets were handled in the cache tags
- assert((MSHR*)pkt->senderState == &miss);
- miss.deallocate();
- cache->clearBlocked(Blocked_NoMSHRs);
- } else {
- if (((MSHR*)(pkt->senderState))->hasTargets()) {
- // Should only have 1 target if we had any
- assert(((MSHR*)(pkt->senderState))->getNumTargets() == 1);
- PacketPtr target = ((MSHR*)(pkt->senderState))->getTarget();
- ((MSHR*)(pkt->senderState))->popTarget();
- if (pkt->isRead()) {
- std::memcpy(target->getPtr<uint8_t>(), pkt->getPtr<uint8_t>(), target->getSize());
- }
- cache->respond(target, time);
- assert(!((MSHR*)(pkt->senderState))->hasTargets());
- }
-
- if (pkt->isWrite()) {
- assert(((MSHR*)(pkt->senderState)) == &wb);
- wb.deallocate();
- cache->clearBlocked(Blocked_NoWBBuffers);
- } else {
- miss.deallocate();
- cache->clearBlocked(Blocked_NoMSHRs);
- }
- }
-}
-
-void
-BlockingBuffer::squash(int threadNum)
-{
- if (miss.threadNum == threadNum) {
- PacketPtr target = miss.getTarget();
- miss.popTarget();
- assert(0/*target->req->getThreadNum()*/ == threadNum);
- target = NULL;
- assert(!miss.hasTargets());
- miss.ntargets=0;
- if (!miss.inService) {
- miss.deallocate();
- cache->clearBlocked(Blocked_NoMSHRs);
- cache->clearMasterRequest(Request_MSHR);
- }
- }
-}
-
-void
-BlockingBuffer::doWriteback(Addr addr,
- int size, uint8_t *data, bool compressed)
-{
- // Generate request
- Request * req = new Request(addr, size, 0);
- PacketPtr pkt = new Packet(req, MemCmd::Writeback, -1);
- pkt->allocate();
- if (data) {
- std::memcpy(pkt->getPtr<uint8_t>(), data, size);
- }
-
- if (compressed) {
- pkt->flags |= COMPRESSED;
- }
-
- ///All writebacks charged to same thread @todo figure this out
- writebacks[0/*pkt->req->getThreadNum()*/]++;
-
- wb.allocateAsBuffer(pkt);
- cache->setMasterRequest(Request_WB, curTick);
- cache->setBlocked(Blocked_NoWBBuffers);
-}
-
-
-
-void
-BlockingBuffer::doWriteback(PacketPtr &pkt)
-{
- writebacks[0/*pkt->req->getThreadNum()*/]++;
-
- wb.allocateAsBuffer(pkt);
-
- // Since allocate as buffer copies the request,
- // need to copy data here.
- std::memcpy(wb.pkt->getPtr<uint8_t>(), pkt->getPtr<uint8_t>(), pkt->getSize());
-
- cache->setBlocked(Blocked_NoWBBuffers);
- cache->setMasterRequest(Request_WB, curTick);
-}
-
-
-MSHR *
-BlockingBuffer::findMSHR(Addr addr)
-{
- if (miss.addr == addr && miss.pkt)
- return &miss;
- return NULL;
-}
-
-
-bool
-BlockingBuffer::findWrites(Addr addr, std::vector<MSHR*>& writes)
-{
- if (wb.addr == addr && wb.pkt) {
- writes.push_back(&wb);
- return true;
- }
- return false;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-20 15:10:38 +0000