diff options
Diffstat (limited to 'src/mem/cache/tags')
| -rw-r--r-- | src/mem/cache/tags/SConscript | 2 | ||||
| -rw-r--r-- | src/mem/cache/tags/Tags.py | 13 | ||||
| -rw-r--r-- | src/mem/cache/tags/base.hh | 11 | ||||
| -rw-r--r-- | src/mem/cache/tags/base_set_assoc.cc | 9 | ||||
| -rw-r--r-- | src/mem/cache/tags/base_set_assoc.hh | 60 | ||||
| -rw-r--r-- | src/mem/cache/tags/fa_lru.cc | 3 | ||||
| -rw-r--r-- | src/mem/cache/tags/fa_lru.hh | 9 | ||||
| -rw-r--r-- | src/mem/cache/tags/lru.cc | 120 | ||||
| -rw-r--r-- | src/mem/cache/tags/lru.hh | 78 | ||||
| -rw-r--r-- | src/mem/cache/tags/random_repl.cc | 105 | ||||
| -rw-r--r-- | src/mem/cache/tags/random_repl.hh | 78 |
11 files changed, 57 insertions, 431 deletions
diff --git a/src/mem/cache/tags/SConscript b/src/mem/cache/tags/SConscript index 1412286a7..9758b566e 100644 --- a/src/mem/cache/tags/SConscript +++ b/src/mem/cache/tags/SConscript @@ -34,6 +34,4 @@ SimObject('Tags.py') Source('base.cc') Source('base_set_assoc.cc') -Source('lru.cc') -Source('random_repl.cc') Source('fa_lru.cc') diff --git a/src/mem/cache/tags/Tags.py b/src/mem/cache/tags/Tags.py index b19010f52..ff4eff44e 100644 --- a/src/mem/cache/tags/Tags.py +++ b/src/mem/cache/tags/Tags.py @@ -66,19 +66,12 @@ class BaseTags(ClockedObject): class BaseSetAssoc(BaseTags): type = 'BaseSetAssoc' - abstract = True cxx_header = "mem/cache/tags/base_set_assoc.hh" assoc = Param.Int(Parent.assoc, "associativity") -class LRU(BaseSetAssoc): - type = 'LRU' - cxx_class = 'LRU' - cxx_header = "mem/cache/tags/lru.hh" - -class RandomRepl(BaseSetAssoc): - type = 'RandomRepl' - cxx_class = 'RandomRepl' - cxx_header = "mem/cache/tags/random_repl.hh" + # Get replacement policy from the parent (cache) + replacement_policy = Param.BaseReplacementPolicy( + Parent.replacement_policy, "Replacement policy") class FALRU(BaseTags): type = 'FALRU' diff --git a/src/mem/cache/tags/base.hh b/src/mem/cache/tags/base.hh index 9e7242c1b..74fc7e0d0 100644 --- a/src/mem/cache/tags/base.hh +++ b/src/mem/cache/tags/base.hh @@ -54,6 +54,7 @@ #include "base/callback.hh" #include "base/statistics.hh" #include "mem/cache/blk.hh" +#include "mem/cache/replacement_policies/base.hh" #include "params/BaseTags.hh" #include "sim/clocked_object.hh" @@ -249,6 +250,14 @@ class BaseTags : public ClockedObject occupancies[blk->srcMasterId]--; } + /** + * Find replacement victim based on address. + * + * @param addr Address to find a victim for. + * @return Cache block to be replaced. + */ + virtual CacheBlk* findVictim(Addr addr) = 0; + virtual CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat) = 0; virtual Addr extractTag(Addr addr) const = 0; @@ -263,8 +272,6 @@ class BaseTags : public ClockedObject */ virtual Addr regenerateBlkAddr(const CacheBlk* blk) const = 0; - virtual CacheBlk* findVictim(Addr addr) = 0; - virtual int extractSet(Addr addr) const = 0; virtual void forEachBlk(CacheBlkVisitor &visitor) = 0; diff --git a/src/mem/cache/tags/base_set_assoc.cc b/src/mem/cache/tags/base_set_assoc.cc index 61764fe91..2475e6fc0 100644 --- a/src/mem/cache/tags/base_set_assoc.cc +++ b/src/mem/cache/tags/base_set_assoc.cc @@ -60,7 +60,8 @@ BaseSetAssoc::BaseSetAssoc(const Params *p) dataBlks(new uint8_t[p->size]), // Allocate data storage in one big chunk numSets(p->size / (p->block_size * p->assoc)), sequentialAccess(p->sequential_access), - sets(p->size / (p->block_size * p->assoc)) + sets(p->size / (p->block_size * p->assoc)), + replacementPolicy(p->replacement_policy) { // Check parameters if (blkSize < 4 || !isPowerOf2(blkSize)) { @@ -184,3 +185,9 @@ BaseSetAssoc::computeStats() } } } + +BaseSetAssoc * +BaseSetAssocParams::create() +{ + return new BaseSetAssoc(this); +} diff --git a/src/mem/cache/tags/base_set_assoc.hh b/src/mem/cache/tags/base_set_assoc.hh index 1fd739110..f7b386a92 100644 --- a/src/mem/cache/tags/base_set_assoc.hh +++ b/src/mem/cache/tags/base_set_assoc.hh @@ -64,14 +64,9 @@ * A BaseSetAssoc cache tag store. * @sa \ref gem5MemorySystem "gem5 Memory System" * - * The BaseSetAssoc tags provide a base, as well as the functionality - * common to any set associative tags. Any derived class must implement - * the methods related to the specifics of the actual replacment policy. - * These are: - * - * BlkType* accessBlock(); - * BlkType* findVictim(); - * void insertBlock(); + * The BaseSetAssoc placement policy divides the cache into s sets of w + * cache lines (ways). A cache line is mapped onto a set, and can be placed + * into any of the ways of this set. */ class BaseSetAssoc : public BaseTags { @@ -109,7 +104,10 @@ class BaseSetAssoc : public BaseTags /** Mask out all bits that aren't part of the set index. */ unsigned setMask; -public: + /** Replacement policy */ + BaseReplacementPolicy *replacementPolicy; + + public: /** Convenience typedef. */ typedef BaseSetAssocParams Params; @@ -169,7 +167,9 @@ public: lat = cache->ticksToCycles(blk->whenReady - curTick()) + accessLatency; } - blk->refCount += 1; + + // Update replacement data of accessed block + replacementPolicy->touch(blk); } else { // If a cache miss lat = lookupLatency; @@ -189,25 +189,29 @@ public: CacheBlk* findBlock(Addr addr, bool is_secure) const override; /** - * Find an invalid block to evict for the address provided. - * If there are no invalid blocks, this will return the block - * in the least-recently-used position. - * @param addr The addr to a find a replacement candidate for. - * @return The candidate block. + * Find replacement victim based on address. + * + * @param addr Address to find a victim for. + * @return Cache block to be replaced. */ CacheBlk* findVictim(Addr addr) override { - BlkType *blk = nullptr; - int set = extractSet(addr); - - // prefer to evict an invalid block - for (int i = 0; i < allocAssoc; ++i) { - blk = sets[set].blks[i]; - if (!blk->isValid()) - break; - } + // Choose replacement victim from replacement candidates + return replacementPolicy->getVictim(getPossibleLocations(addr)); + } - return blk; + /** + * Find all possible block locations for insertion and replacement of + * an address. Should be called immediately before ReplacementPolicy's + * findVictim() not to break cache resizing. + * Returns blocks in all ways belonging to the set of the address. + * + * @param addr The addr to a find possible locations for. + * @return The possible locations. + */ + const std::vector<CacheBlk*> getPossibleLocations(Addr addr) + { + return sets[extractSet(addr)].blks; } /** @@ -242,9 +246,8 @@ public: } // Previous block, if existed, has been removed, and now we have - // to insert the new one and mark it as touched + // to insert the new one tagsInUse++; - blk->isTouched = true; // Set tag for new block. Caller is responsible for setting status. blk->tag = extractTag(addr); @@ -254,11 +257,12 @@ public: occupancies[master_id]++; blk->srcMasterId = master_id; blk->task_id = task_id; - blk->tickInserted = curTick(); // We only need to write into one tag and one data block. tagAccesses += 1; dataAccesses += 1; + + replacementPolicy->reset(blk); } /** diff --git a/src/mem/cache/tags/fa_lru.cc b/src/mem/cache/tags/fa_lru.cc index d40398975..a38d0bf34 100644 --- a/src/mem/cache/tags/fa_lru.cc +++ b/src/mem/cache/tags/fa_lru.cc @@ -98,7 +98,6 @@ FALRU::FALRU(const Params *p) } blks[i].prev = &(blks[i-1]); blks[i].next = &(blks[i+1]); - blks[i].isTouched = false; blks[i].set = 0; blks[i].way = i; } @@ -255,13 +254,13 @@ FALRU::findVictim(Addr addr) replacements[0]++; } else { tagsInUse++; - blk->isTouched = true; if (!warmedUp && tagsInUse.value() >= warmupBound) { warmedUp = true; warmupCycle = curTick(); } } //assert(check()); + return blk; } diff --git a/src/mem/cache/tags/fa_lru.hh b/src/mem/cache/tags/fa_lru.hh index 559f56e28..7f3f99ae0 100644 --- a/src/mem/cache/tags/fa_lru.hh +++ b/src/mem/cache/tags/fa_lru.hh @@ -67,8 +67,6 @@ public: FALRUBlk *prev; /** The next block in LRU order. */ FALRUBlk *next; - /** Has this block been touched? */ - bool isTouched; /** * A bit mask of the sizes of cache that this block is resident in. @@ -204,9 +202,10 @@ public: CacheBlk* findBlock(Addr addr, bool is_secure) const override; /** - * Find a replacement block for the address provided. - * @param pkt The request to a find a replacement candidate for. - * @return The block to place the replacement in. + * Find replacement victim based on address. + * + * @param addr Address to find a victim for. + * @return Cache block to be replaced. */ CacheBlk* findVictim(Addr addr) override; diff --git a/src/mem/cache/tags/lru.cc b/src/mem/cache/tags/lru.cc deleted file mode 100644 index 4302a8de6..000000000 --- a/src/mem/cache/tags/lru.cc +++ /dev/null @@ -1,120 +0,0 @@ -/* - * Copyright (c) 2012-2013 ARM Limited - * All rights reserved. - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2003-2005,2014 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 LRU tag store. - */ - -#include "mem/cache/tags/lru.hh" - -#include "debug/CacheRepl.hh" -#include "mem/cache/base.hh" - -LRU::LRU(const Params *p) - : BaseSetAssoc(p) -{ -} - -CacheBlk* -LRU::accessBlock(Addr addr, bool is_secure, Cycles &lat) -{ - CacheBlk *blk = BaseSetAssoc::accessBlock(addr, is_secure, lat); - - if (blk != nullptr) { - // move this block to head of the MRU list - sets[blk->set].moveToHead(blk); - DPRINTF(CacheRepl, "set %x: moving blk %x (%s) to MRU\n", - blk->set, regenerateBlkAddr(blk), - is_secure ? "s" : "ns"); - } - - return blk; -} - -CacheBlk* -LRU::findVictim(Addr addr) -{ - int set = extractSet(addr); - // grab a replacement candidate - BlkType *blk = nullptr; - for (int i = assoc - 1; i >= 0; i--) { - BlkType *b = sets[set].blks[i]; - if (b->way < allocAssoc) { - blk = b; - break; - } - } - assert(!blk || blk->way < allocAssoc); - - if (blk && blk->isValid()) { - DPRINTF(CacheRepl, "set %x: selecting blk %x for replacement\n", - set, regenerateBlkAddr(blk)); - } - - return blk; -} - -void -LRU::insertBlock(PacketPtr pkt, BlkType *blk) -{ - BaseSetAssoc::insertBlock(pkt, blk); - - int set = extractSet(pkt->getAddr()); - sets[set].moveToHead(blk); -} - -void -LRU::invalidate(CacheBlk *blk) -{ - BaseSetAssoc::invalidate(blk); - - // should be evicted before valid blocks - int set = blk->set; - sets[set].moveToTail(blk); -} - -LRU* -LRUParams::create() -{ - return new LRU(this); -} diff --git a/src/mem/cache/tags/lru.hh b/src/mem/cache/tags/lru.hh deleted file mode 100644 index 1fbe4eb6d..000000000 --- a/src/mem/cache/tags/lru.hh +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Copyright (c) 2012-2013 ARM Limited - * All rights reserved. - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2003-2005,2014 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 - * Declaration of a LRU tag store. - * The LRU tags guarantee that the true least-recently-used way in - * a set will always be evicted. - */ - -#ifndef __MEM_CACHE_TAGS_LRU_HH__ -#define __MEM_CACHE_TAGS_LRU_HH__ - -#include "mem/cache/tags/base_set_assoc.hh" -#include "params/LRU.hh" - -class LRU : public BaseSetAssoc -{ - public: - /** Convenience typedef. */ - typedef LRUParams Params; - - /** - * Construct and initialize this tag store. - */ - LRU(const Params *p); - - /** - * Destructor - */ - ~LRU() {} - - CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat) override; - CacheBlk* findVictim(Addr addr) override; - void insertBlock(PacketPtr pkt, BlkType *blk) override; - void invalidate(CacheBlk *blk) override; -}; - -#endif // __MEM_CACHE_TAGS_LRU_HH__ diff --git a/src/mem/cache/tags/random_repl.cc b/src/mem/cache/tags/random_repl.cc deleted file mode 100644 index aa5f6fcb9..000000000 --- a/src/mem/cache/tags/random_repl.cc +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Copyright (c) 2017 ARM Limited - * All rights reserved. - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2014 The Regents of The University of Michigan - * Copyright (c) 2016 ARM Limited - * 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: Anthony Gutierrez - */ - -/** - * @file - * Definitions of a random replacement tag store. - */ - -#include "mem/cache/tags/random_repl.hh" - -#include "base/random.hh" -#include "debug/CacheRepl.hh" -#include "mem/cache/base.hh" - -RandomRepl::RandomRepl(const Params *p) - : BaseSetAssoc(p) - -{ -} - -CacheBlk* -RandomRepl::accessBlock(Addr addr, bool is_secure, Cycles &lat) -{ - return BaseSetAssoc::accessBlock(addr, is_secure, lat); -} - -CacheBlk* -RandomRepl::findVictim(Addr addr) -{ - CacheBlk *blk = BaseSetAssoc::findVictim(addr); - unsigned set = extractSet(addr); - - // if all blocks are valid, pick a replacement at random - if (blk && blk->isValid()) { - // find a random index within the bounds of the set - int idx = random_mt.random<int>(0, assoc - 1); - blk = sets[set].blks[idx]; - // Enforce allocation limit - while (blk->way >= allocAssoc) { - idx = (idx + 1) % assoc; - blk = sets[set].blks[idx]; - } - - assert(idx < assoc); - assert(idx >= 0); - assert(blk->way < allocAssoc); - - DPRINTF(CacheRepl, "set %x: selecting blk %x for replacement\n", - blk->set, regenerateBlkAddr(blk)); - } - - return blk; -} - -void -RandomRepl::insertBlock(PacketPtr pkt, BlkType *blk) -{ - BaseSetAssoc::insertBlock(pkt, blk); -} - -RandomRepl* -RandomReplParams::create() -{ - return new RandomRepl(this); -} diff --git a/src/mem/cache/tags/random_repl.hh b/src/mem/cache/tags/random_repl.hh deleted file mode 100644 index 71b2f5ce6..000000000 --- a/src/mem/cache/tags/random_repl.hh +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Copyright (c) 2017 ARM Limited - * All rights reserved. - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2014 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: Anthony Gutierrez - */ - -/** - * @file - * Declaration of a random replacement tag store. - * The RandomRepl tags first try to evict an invalid - * block. If no invalid blocks are found, a candidate - * for eviction is found at random. - */ - -#ifndef __MEM_CACHE_TAGS_RANDOM_REPL_HH__ -#define __MEM_CACHE_TAGS_RANDOM_REPL_HH__ - -#include "mem/cache/tags/base_set_assoc.hh" -#include "params/RandomRepl.hh" - -class RandomRepl : public BaseSetAssoc -{ - public: - /** Convenience typedef. */ - typedef RandomReplParams Params; - - /** - * Construct and initiliaze this tag store. - */ - RandomRepl(const Params *p); - - /** - * Destructor - */ - ~RandomRepl() {} - - CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat); - CacheBlk* findVictim(Addr addr); - void insertBlock(PacketPtr pkt, BlkType *blk); -}; - -#endif // __MEM_CACHE_TAGS_RANDOM_REPL_HH__ |