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-rw-r--r--src/mem/cache/mshr_queue.cc146
1 files changed, 10 insertions, 136 deletions
diff --git a/src/mem/cache/mshr_queue.cc b/src/mem/cache/mshr_queue.cc
index ed6769349..f4992e176 100644
--- a/src/mem/cache/mshr_queue.cc
+++ b/src/mem/cache/mshr_queue.cc
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012-2013, 2015 ARM Limited
+ * Copyright (c) 2012-2013, 2015-2016 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
@@ -45,104 +45,15 @@
* Definition of MSHRQueue class functions.
*/
-#include "base/trace.hh"
#include "mem/cache/mshr_queue.hh"
-#include "debug/Drain.hh"
using namespace std;
MSHRQueue::MSHRQueue(const std::string &_label,
- int num_entries, int reserve, int demand_reserve,
- int _index)
- : label(_label), numEntries(num_entries + reserve - 1),
- numReserve(reserve), demandReserve(demand_reserve),
- registers(numEntries), allocated(0),
- inServiceEntries(0), index(_index)
-{
- for (int i = 0; i < numEntries; ++i) {
- registers[i].queue = this;
- freeList.push_back(&registers[i]);
- }
-}
-
-MSHR *
-MSHRQueue::findMatch(Addr blk_addr, bool is_secure) const
-{
- for (const auto& mshr : allocatedList) {
- // we ignore any MSHRs allocated for uncacheable accesses and
- // simply ignore them when matching, in the cache we never
- // check for matches when adding new uncacheable entries, and
- // we do not want normal cacheable accesses being added to an
- // MSHR serving an uncacheable access
- if (!mshr->isUncacheable() && mshr->blkAddr == blk_addr &&
- mshr->isSecure == is_secure) {
- return mshr;
- }
- }
- return NULL;
-}
-
-bool
-MSHRQueue::findMatches(Addr blk_addr, bool is_secure,
- vector<MSHR*>& matches) const
-{
- // Need an empty vector
- assert(matches.empty());
- bool retval = false;
- for (const auto& mshr : allocatedList) {
- if (!mshr->isUncacheable() && mshr->blkAddr == blk_addr &&
- mshr->isSecure == is_secure) {
- retval = true;
- matches.push_back(mshr);
- }
- }
- return retval;
-}
-
-
-bool
-MSHRQueue::checkFunctional(PacketPtr pkt, Addr blk_addr)
-{
- pkt->pushLabel(label);
- for (const auto& mshr : allocatedList) {
- if (mshr->blkAddr == blk_addr && mshr->checkFunctional(pkt)) {
- pkt->popLabel();
- return true;
- }
- }
- pkt->popLabel();
- return false;
-}
-
-
-MSHR *
-MSHRQueue::findPending(Addr blk_addr, bool is_secure) const
-{
- for (const auto& mshr : readyList) {
- if (mshr->blkAddr == blk_addr && mshr->isSecure == is_secure) {
- return mshr;
- }
- }
- return NULL;
-}
-
-
-MSHR::Iterator
-MSHRQueue::addToReadyList(MSHR *mshr)
-{
- if (readyList.empty() || readyList.back()->readyTime <= mshr->readyTime) {
- return readyList.insert(readyList.end(), mshr);
- }
-
- for (auto i = readyList.begin(); i != readyList.end(); ++i) {
- if ((*i)->readyTime > mshr->readyTime) {
- return readyList.insert(i, mshr);
- }
- }
- assert(false);
- return readyList.end(); // keep stupid compilers happy
-}
-
+ int num_entries, int reserve, int demand_reserve)
+ : Queue<MSHR>(_label, num_entries, reserve),
+ demandReserve(demand_reserve)
+{}
MSHR *
MSHRQueue::allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt,
@@ -161,34 +72,6 @@ MSHRQueue::allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt,
return mshr;
}
-
-void
-MSHRQueue::deallocate(MSHR *mshr)
-{
- deallocateOne(mshr);
-}
-
-MSHR::Iterator
-MSHRQueue::deallocateOne(MSHR *mshr)
-{
- MSHR::Iterator retval = allocatedList.erase(mshr->allocIter);
- freeList.push_front(mshr);
- allocated--;
- if (mshr->inService) {
- inServiceEntries--;
- } else {
- readyList.erase(mshr->readyIter);
- }
- mshr->deallocate();
- if (drainState() == DrainState::Draining && allocated == 0) {
- // Notify the drain manager that we have completed draining if
- // there are no other outstanding requests in this MSHR queue.
- DPRINTF(Drain, "MSHRQueue now empty, signalling drained\n");
- signalDrainDone();
- }
- return retval;
-}
-
void
MSHRQueue::moveToFront(MSHR *mshr)
{
@@ -202,12 +85,9 @@ MSHRQueue::moveToFront(MSHR *mshr)
void
MSHRQueue::markInService(MSHR *mshr, bool pending_modified_resp)
{
- if (mshr->markInService(pending_modified_resp)) {
- deallocate(mshr);
- } else {
- readyList.erase(mshr->readyIter);
- inServiceEntries += 1;
- }
+ mshr->markInService(pending_modified_resp);
+ readyList.erase(mshr->readyIter);
+ _numInService += 1;
}
void
@@ -215,7 +95,7 @@ MSHRQueue::markPending(MSHR *mshr)
{
assert(mshr->inService);
mshr->inService = false;
- --inServiceEntries;
+ --_numInService;
/**
* @ todo might want to add rerequests to front of pending list for
* performance.
@@ -232,15 +112,9 @@ MSHRQueue::forceDeallocateTarget(MSHR *mshr)
mshr->popTarget();
// Delete mshr if no remaining targets
if (!mshr->hasTargets() && !mshr->promoteDeferredTargets()) {
- deallocateOne(mshr);
+ deallocate(mshr);
}
// Notify if MSHR queue no longer full
return was_full && !isFull();
}
-
-DrainState
-MSHRQueue::drain()
-{
- return allocated == 0 ? DrainState::Drained : DrainState::Draining;
-}