base_set_assoc.hh revision 11169
110263Satgutier@umich.edu/* 210941Sdavid.guillen@arm.com * Copyright (c) 2012-2014 ARM Limited 310263Satgutier@umich.edu * All rights reserved. 410263Satgutier@umich.edu * 510263Satgutier@umich.edu * The license below extends only to copyright in the software and shall 610263Satgutier@umich.edu * not be construed as granting a license to any other intellectual 710263Satgutier@umich.edu * property including but not limited to intellectual property relating 810263Satgutier@umich.edu * to a hardware implementation of the functionality of the software 910263Satgutier@umich.edu * licensed hereunder. You may use the software subject to the license 1010263Satgutier@umich.edu * terms below provided that you ensure that this notice is replicated 1110263Satgutier@umich.edu * unmodified and in its entirety in all distributions of the software, 1210263Satgutier@umich.edu * modified or unmodified, in source code or in binary form. 1310263Satgutier@umich.edu * 1410263Satgutier@umich.edu * Copyright (c) 2003-2005,2014 The Regents of The University of Michigan 1510263Satgutier@umich.edu * All rights reserved. 1610263Satgutier@umich.edu * 1710263Satgutier@umich.edu * Redistribution and use in source and binary forms, with or without 1810263Satgutier@umich.edu * modification, are permitted provided that the following conditions are 1910263Satgutier@umich.edu * met: redistributions of source code must retain the above copyright 2010263Satgutier@umich.edu * notice, this list of conditions and the following disclaimer; 2110263Satgutier@umich.edu * redistributions in binary form must reproduce the above copyright 2210263Satgutier@umich.edu * notice, this list of conditions and the following disclaimer in the 2310263Satgutier@umich.edu * documentation and/or other materials provided with the distribution; 2410263Satgutier@umich.edu * neither the name of the copyright holders nor the names of its 2510263Satgutier@umich.edu * contributors may be used to endorse or promote products derived from 2610263Satgutier@umich.edu * this software without specific prior written permission. 2710263Satgutier@umich.edu * 2810263Satgutier@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2910263Satgutier@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3010263Satgutier@umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 3110263Satgutier@umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3210263Satgutier@umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3310263Satgutier@umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3410263Satgutier@umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3510263Satgutier@umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3610263Satgutier@umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3710263Satgutier@umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3810263Satgutier@umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3910263Satgutier@umich.edu * 4010263Satgutier@umich.edu * Authors: Erik Hallnor 4110263Satgutier@umich.edu */ 4210263Satgutier@umich.edu 4310263Satgutier@umich.edu/** 4410263Satgutier@umich.edu * @file 4510263Satgutier@umich.edu * Declaration of a base set associative tag store. 4610263Satgutier@umich.edu */ 4710263Satgutier@umich.edu 4810263Satgutier@umich.edu#ifndef __MEM_CACHE_TAGS_BASESETASSOC_HH__ 4910263Satgutier@umich.edu#define __MEM_CACHE_TAGS_BASESETASSOC_HH__ 5010263Satgutier@umich.edu 5110263Satgutier@umich.edu#include <cassert> 5210263Satgutier@umich.edu#include <cstring> 5310263Satgutier@umich.edu#include <list> 5410263Satgutier@umich.edu 5510263Satgutier@umich.edu#include "mem/cache/tags/base.hh" 5610263Satgutier@umich.edu#include "mem/cache/tags/cacheset.hh" 5710263Satgutier@umich.edu#include "mem/cache/base.hh" 5810263Satgutier@umich.edu#include "mem/cache/blk.hh" 5910263Satgutier@umich.edu#include "mem/packet.hh" 6010263Satgutier@umich.edu#include "params/BaseSetAssoc.hh" 6110263Satgutier@umich.edu 6210263Satgutier@umich.edu/** 6310263Satgutier@umich.edu * A BaseSetAssoc cache tag store. 6410263Satgutier@umich.edu * @sa \ref gem5MemorySystem "gem5 Memory System" 6510263Satgutier@umich.edu * 6610263Satgutier@umich.edu * The BaseSetAssoc tags provide a base, as well as the functionality 6710263Satgutier@umich.edu * common to any set associative tags. Any derived class must implement 6810263Satgutier@umich.edu * the methods related to the specifics of the actual replacment policy. 6910263Satgutier@umich.edu * These are: 7010263Satgutier@umich.edu * 7110263Satgutier@umich.edu * BlkType* accessBlock(); 7210263Satgutier@umich.edu * BlkType* findVictim(); 7310263Satgutier@umich.edu * void insertBlock(); 7410263Satgutier@umich.edu * void invalidate(); 7510263Satgutier@umich.edu */ 7610263Satgutier@umich.educlass BaseSetAssoc : public BaseTags 7710263Satgutier@umich.edu{ 7810263Satgutier@umich.edu public: 7910263Satgutier@umich.edu /** Typedef the block type used in this tag store. */ 8010263Satgutier@umich.edu typedef CacheBlk BlkType; 8110263Satgutier@umich.edu /** Typedef for a list of pointers to the local block class. */ 8210263Satgutier@umich.edu typedef std::list<BlkType*> BlkList; 8310263Satgutier@umich.edu /** Typedef the set type used in this tag store. */ 8410263Satgutier@umich.edu typedef CacheSet<CacheBlk> SetType; 8510263Satgutier@umich.edu 8610263Satgutier@umich.edu 8710263Satgutier@umich.edu protected: 8810263Satgutier@umich.edu /** The associativity of the cache. */ 8910263Satgutier@umich.edu const unsigned assoc; 9010941Sdavid.guillen@arm.com /** The allocatable associativity of the cache (alloc mask). */ 9110941Sdavid.guillen@arm.com unsigned allocAssoc; 9210263Satgutier@umich.edu /** The number of sets in the cache. */ 9310263Satgutier@umich.edu const unsigned numSets; 9410263Satgutier@umich.edu /** Whether tags and data are accessed sequentially. */ 9510263Satgutier@umich.edu const bool sequentialAccess; 9610263Satgutier@umich.edu 9710263Satgutier@umich.edu /** The cache sets. */ 9810263Satgutier@umich.edu SetType *sets; 9910263Satgutier@umich.edu 10010263Satgutier@umich.edu /** The cache blocks. */ 10110263Satgutier@umich.edu BlkType *blks; 10210263Satgutier@umich.edu /** The data blocks, 1 per cache block. */ 10310263Satgutier@umich.edu uint8_t *dataBlks; 10410263Satgutier@umich.edu 10510263Satgutier@umich.edu /** The amount to shift the address to get the set. */ 10610263Satgutier@umich.edu int setShift; 10710263Satgutier@umich.edu /** The amount to shift the address to get the tag. */ 10810263Satgutier@umich.edu int tagShift; 10910263Satgutier@umich.edu /** Mask out all bits that aren't part of the set index. */ 11010263Satgutier@umich.edu unsigned setMask; 11110263Satgutier@umich.edu /** Mask out all bits that aren't part of the block offset. */ 11210263Satgutier@umich.edu unsigned blkMask; 11310263Satgutier@umich.edu 11410263Satgutier@umich.edupublic: 11510263Satgutier@umich.edu 11610263Satgutier@umich.edu /** Convenience typedef. */ 11710263Satgutier@umich.edu typedef BaseSetAssocParams Params; 11810263Satgutier@umich.edu 11910263Satgutier@umich.edu /** 12010263Satgutier@umich.edu * Construct and initialize this tag store. 12110263Satgutier@umich.edu */ 12210263Satgutier@umich.edu BaseSetAssoc(const Params *p); 12310263Satgutier@umich.edu 12410263Satgutier@umich.edu /** 12510263Satgutier@umich.edu * Destructor 12610263Satgutier@umich.edu */ 12710263Satgutier@umich.edu virtual ~BaseSetAssoc(); 12810263Satgutier@umich.edu 12910263Satgutier@umich.edu /** 13010263Satgutier@umich.edu * Return the block size. 13110263Satgutier@umich.edu * @return the block size. 13210263Satgutier@umich.edu */ 13310263Satgutier@umich.edu unsigned 13410263Satgutier@umich.edu getBlockSize() const 13510263Satgutier@umich.edu { 13610263Satgutier@umich.edu return blkSize; 13710263Satgutier@umich.edu } 13810263Satgutier@umich.edu 13910263Satgutier@umich.edu /** 14010263Satgutier@umich.edu * Return the subblock size. In the case of BaseSetAssoc it is always 14110263Satgutier@umich.edu * the block size. 14210263Satgutier@umich.edu * @return The block size. 14310263Satgutier@umich.edu */ 14410263Satgutier@umich.edu unsigned 14510263Satgutier@umich.edu getSubBlockSize() const 14610263Satgutier@umich.edu { 14710263Satgutier@umich.edu return blkSize; 14810263Satgutier@umich.edu } 14910263Satgutier@umich.edu 15010263Satgutier@umich.edu /** 15110941Sdavid.guillen@arm.com * Return the number of sets this cache has 15210941Sdavid.guillen@arm.com * @return The number of sets. 15310941Sdavid.guillen@arm.com */ 15410941Sdavid.guillen@arm.com unsigned 15511169Sandreas.hansson@arm.com getNumSets() const override 15610941Sdavid.guillen@arm.com { 15710941Sdavid.guillen@arm.com return numSets; 15810941Sdavid.guillen@arm.com } 15910941Sdavid.guillen@arm.com 16010941Sdavid.guillen@arm.com /** 16110941Sdavid.guillen@arm.com * Return the number of ways this cache has 16210941Sdavid.guillen@arm.com * @return The number of ways. 16310941Sdavid.guillen@arm.com */ 16410941Sdavid.guillen@arm.com unsigned 16511169Sandreas.hansson@arm.com getNumWays() const override 16610941Sdavid.guillen@arm.com { 16710941Sdavid.guillen@arm.com return assoc; 16810941Sdavid.guillen@arm.com } 16910941Sdavid.guillen@arm.com 17010941Sdavid.guillen@arm.com /** 17110941Sdavid.guillen@arm.com * Find the cache block given set and way 17210941Sdavid.guillen@arm.com * @param set The set of the block. 17310941Sdavid.guillen@arm.com * @param way The way of the block. 17410941Sdavid.guillen@arm.com * @return The cache block. 17510941Sdavid.guillen@arm.com */ 17611169Sandreas.hansson@arm.com CacheBlk *findBlockBySetAndWay(int set, int way) const override; 17710941Sdavid.guillen@arm.com 17810941Sdavid.guillen@arm.com /** 17910263Satgutier@umich.edu * Invalidate the given block. 18010263Satgutier@umich.edu * @param blk The block to invalidate. 18110263Satgutier@umich.edu */ 18211169Sandreas.hansson@arm.com void invalidate(CacheBlk *blk) override 18310263Satgutier@umich.edu { 18410263Satgutier@umich.edu assert(blk); 18510263Satgutier@umich.edu assert(blk->isValid()); 18610263Satgutier@umich.edu tagsInUse--; 18710263Satgutier@umich.edu assert(blk->srcMasterId < cache->system->maxMasters()); 18810263Satgutier@umich.edu occupancies[blk->srcMasterId]--; 18910263Satgutier@umich.edu blk->srcMasterId = Request::invldMasterId; 19010263Satgutier@umich.edu blk->task_id = ContextSwitchTaskId::Unknown; 19110263Satgutier@umich.edu blk->tickInserted = curTick(); 19210263Satgutier@umich.edu } 19310263Satgutier@umich.edu 19410263Satgutier@umich.edu /** 19510263Satgutier@umich.edu * Access block and update replacement data. May not succeed, in which case 19610263Satgutier@umich.edu * NULL pointer is returned. This has all the implications of a cache 19710263Satgutier@umich.edu * access and should only be used as such. Returns the access latency as a 19810263Satgutier@umich.edu * side effect. 19910263Satgutier@umich.edu * @param addr The address to find. 20010263Satgutier@umich.edu * @param is_secure True if the target memory space is secure. 20110263Satgutier@umich.edu * @param asid The address space ID. 20210263Satgutier@umich.edu * @param lat The access latency. 20310263Satgutier@umich.edu * @return Pointer to the cache block if found. 20410263Satgutier@umich.edu */ 20510815Sdavid.guillen@arm.com CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat, 20611169Sandreas.hansson@arm.com int context_src) override 20710263Satgutier@umich.edu { 20810263Satgutier@umich.edu Addr tag = extractTag(addr); 20910263Satgutier@umich.edu int set = extractSet(addr); 21010263Satgutier@umich.edu BlkType *blk = sets[set].findBlk(tag, is_secure); 21110693SMarco.Balboni@ARM.com lat = accessLatency;; 21210263Satgutier@umich.edu 21310263Satgutier@umich.edu // Access all tags in parallel, hence one in each way. The data side 21410263Satgutier@umich.edu // either accesses all blocks in parallel, or one block sequentially on 21510263Satgutier@umich.edu // a hit. Sequential access with a miss doesn't access data. 21610941Sdavid.guillen@arm.com tagAccesses += allocAssoc; 21710263Satgutier@umich.edu if (sequentialAccess) { 21810263Satgutier@umich.edu if (blk != NULL) { 21910263Satgutier@umich.edu dataAccesses += 1; 22010263Satgutier@umich.edu } 22110263Satgutier@umich.edu } else { 22210941Sdavid.guillen@arm.com dataAccesses += allocAssoc; 22310263Satgutier@umich.edu } 22410263Satgutier@umich.edu 22510263Satgutier@umich.edu if (blk != NULL) { 22610263Satgutier@umich.edu if (blk->whenReady > curTick() 22710263Satgutier@umich.edu && cache->ticksToCycles(blk->whenReady - curTick()) 22810693SMarco.Balboni@ARM.com > accessLatency) { 22910263Satgutier@umich.edu lat = cache->ticksToCycles(blk->whenReady - curTick()); 23010263Satgutier@umich.edu } 23110263Satgutier@umich.edu blk->refCount += 1; 23210263Satgutier@umich.edu } 23310263Satgutier@umich.edu 23410263Satgutier@umich.edu return blk; 23510263Satgutier@umich.edu } 23610263Satgutier@umich.edu 23710263Satgutier@umich.edu /** 23810263Satgutier@umich.edu * Finds the given address in the cache, do not update replacement data. 23910263Satgutier@umich.edu * i.e. This is a no-side-effect find of a block. 24010263Satgutier@umich.edu * @param addr The address to find. 24110263Satgutier@umich.edu * @param is_secure True if the target memory space is secure. 24210263Satgutier@umich.edu * @param asid The address space ID. 24310263Satgutier@umich.edu * @return Pointer to the cache block if found. 24410263Satgutier@umich.edu */ 24511169Sandreas.hansson@arm.com CacheBlk* findBlock(Addr addr, bool is_secure) const override; 24610263Satgutier@umich.edu 24710263Satgutier@umich.edu /** 24810263Satgutier@umich.edu * Find an invalid block to evict for the address provided. 24910263Satgutier@umich.edu * If there are no invalid blocks, this will return the block 25010263Satgutier@umich.edu * in the least-recently-used position. 25110263Satgutier@umich.edu * @param addr The addr to a find a replacement candidate for. 25210263Satgutier@umich.edu * @return The candidate block. 25310263Satgutier@umich.edu */ 25411169Sandreas.hansson@arm.com CacheBlk* findVictim(Addr addr) override 25510263Satgutier@umich.edu { 25610263Satgutier@umich.edu BlkType *blk = NULL; 25710263Satgutier@umich.edu int set = extractSet(addr); 25810263Satgutier@umich.edu 25910263Satgutier@umich.edu // prefer to evict an invalid block 26010941Sdavid.guillen@arm.com for (int i = 0; i < allocAssoc; ++i) { 26110263Satgutier@umich.edu blk = sets[set].blks[i]; 26210941Sdavid.guillen@arm.com if (!blk->isValid()) 26310263Satgutier@umich.edu break; 26410263Satgutier@umich.edu } 26510263Satgutier@umich.edu 26610263Satgutier@umich.edu return blk; 26710263Satgutier@umich.edu } 26810263Satgutier@umich.edu 26910263Satgutier@umich.edu /** 27010263Satgutier@umich.edu * Insert the new block into the cache. 27110263Satgutier@umich.edu * @param pkt Packet holding the address to update 27210263Satgutier@umich.edu * @param blk The block to update. 27310263Satgutier@umich.edu */ 27411169Sandreas.hansson@arm.com void insertBlock(PacketPtr pkt, CacheBlk *blk) override 27510263Satgutier@umich.edu { 27610263Satgutier@umich.edu Addr addr = pkt->getAddr(); 27710263Satgutier@umich.edu MasterID master_id = pkt->req->masterId(); 27810263Satgutier@umich.edu uint32_t task_id = pkt->req->taskId(); 27910274Smitch.hayenga@arm.com 28010263Satgutier@umich.edu if (!blk->isTouched) { 28110263Satgutier@umich.edu tagsInUse++; 28210263Satgutier@umich.edu blk->isTouched = true; 28310263Satgutier@umich.edu if (!warmedUp && tagsInUse.value() >= warmupBound) { 28410263Satgutier@umich.edu warmedUp = true; 28510263Satgutier@umich.edu warmupCycle = curTick(); 28610263Satgutier@umich.edu } 28710263Satgutier@umich.edu } 28810263Satgutier@umich.edu 28910263Satgutier@umich.edu // If we're replacing a block that was previously valid update 29010263Satgutier@umich.edu // stats for it. This can't be done in findBlock() because a 29110263Satgutier@umich.edu // found block might not actually be replaced there if the 29210263Satgutier@umich.edu // coherence protocol says it can't be. 29310263Satgutier@umich.edu if (blk->isValid()) { 29410263Satgutier@umich.edu replacements[0]++; 29510263Satgutier@umich.edu totalRefs += blk->refCount; 29610263Satgutier@umich.edu ++sampledRefs; 29710263Satgutier@umich.edu blk->refCount = 0; 29810263Satgutier@umich.edu 29910263Satgutier@umich.edu // deal with evicted block 30010263Satgutier@umich.edu assert(blk->srcMasterId < cache->system->maxMasters()); 30110263Satgutier@umich.edu occupancies[blk->srcMasterId]--; 30210263Satgutier@umich.edu 30310263Satgutier@umich.edu blk->invalidate(); 30410263Satgutier@umich.edu } 30510263Satgutier@umich.edu 30610263Satgutier@umich.edu blk->isTouched = true; 30710274Smitch.hayenga@arm.com 30810263Satgutier@umich.edu // Set tag for new block. Caller is responsible for setting status. 30910263Satgutier@umich.edu blk->tag = extractTag(addr); 31010263Satgutier@umich.edu 31110263Satgutier@umich.edu // deal with what we are bringing in 31210263Satgutier@umich.edu assert(master_id < cache->system->maxMasters()); 31310263Satgutier@umich.edu occupancies[master_id]++; 31410263Satgutier@umich.edu blk->srcMasterId = master_id; 31510263Satgutier@umich.edu blk->task_id = task_id; 31610263Satgutier@umich.edu blk->tickInserted = curTick(); 31710263Satgutier@umich.edu 31810263Satgutier@umich.edu // We only need to write into one tag and one data block. 31910263Satgutier@umich.edu tagAccesses += 1; 32010263Satgutier@umich.edu dataAccesses += 1; 32110263Satgutier@umich.edu } 32210263Satgutier@umich.edu 32310263Satgutier@umich.edu /** 32410941Sdavid.guillen@arm.com * Limit the allocation for the cache ways. 32510941Sdavid.guillen@arm.com * @param ways The maximum number of ways available for replacement. 32610941Sdavid.guillen@arm.com */ 32711169Sandreas.hansson@arm.com virtual void setWayAllocationMax(int ways) override 32810941Sdavid.guillen@arm.com { 32910941Sdavid.guillen@arm.com fatal_if(ways < 1, "Allocation limit must be greater than zero"); 33010941Sdavid.guillen@arm.com allocAssoc = ways; 33110941Sdavid.guillen@arm.com } 33210941Sdavid.guillen@arm.com 33310941Sdavid.guillen@arm.com /** 33410941Sdavid.guillen@arm.com * Get the way allocation mask limit. 33510941Sdavid.guillen@arm.com * @return The maximum number of ways available for replacement. 33610941Sdavid.guillen@arm.com */ 33711169Sandreas.hansson@arm.com virtual int getWayAllocationMax() const override 33810941Sdavid.guillen@arm.com { 33910941Sdavid.guillen@arm.com return allocAssoc; 34010941Sdavid.guillen@arm.com } 34110941Sdavid.guillen@arm.com 34210941Sdavid.guillen@arm.com /** 34310263Satgutier@umich.edu * Generate the tag from the given address. 34410263Satgutier@umich.edu * @param addr The address to get the tag from. 34510263Satgutier@umich.edu * @return The tag of the address. 34610263Satgutier@umich.edu */ 34711169Sandreas.hansson@arm.com Addr extractTag(Addr addr) const override 34810263Satgutier@umich.edu { 34910263Satgutier@umich.edu return (addr >> tagShift); 35010263Satgutier@umich.edu } 35110263Satgutier@umich.edu 35210263Satgutier@umich.edu /** 35310263Satgutier@umich.edu * Calculate the set index from the address. 35410263Satgutier@umich.edu * @param addr The address to get the set from. 35510263Satgutier@umich.edu * @return The set index of the address. 35610263Satgutier@umich.edu */ 35711169Sandreas.hansson@arm.com int extractSet(Addr addr) const override 35810263Satgutier@umich.edu { 35910263Satgutier@umich.edu return ((addr >> setShift) & setMask); 36010263Satgutier@umich.edu } 36110263Satgutier@umich.edu 36210263Satgutier@umich.edu /** 36310263Satgutier@umich.edu * Align an address to the block size. 36410263Satgutier@umich.edu * @param addr the address to align. 36510263Satgutier@umich.edu * @return The block address. 36610263Satgutier@umich.edu */ 36710263Satgutier@umich.edu Addr blkAlign(Addr addr) const 36810263Satgutier@umich.edu { 36910263Satgutier@umich.edu return (addr & ~(Addr)blkMask); 37010263Satgutier@umich.edu } 37110263Satgutier@umich.edu 37210263Satgutier@umich.edu /** 37310263Satgutier@umich.edu * Regenerate the block address from the tag. 37410263Satgutier@umich.edu * @param tag The tag of the block. 37510263Satgutier@umich.edu * @param set The set of the block. 37610263Satgutier@umich.edu * @return The block address. 37710263Satgutier@umich.edu */ 37811169Sandreas.hansson@arm.com Addr regenerateBlkAddr(Addr tag, unsigned set) const override 37910263Satgutier@umich.edu { 38010263Satgutier@umich.edu return ((tag << tagShift) | ((Addr)set << setShift)); 38110263Satgutier@umich.edu } 38210263Satgutier@umich.edu 38310263Satgutier@umich.edu /** 38410263Satgutier@umich.edu * Called at end of simulation to complete average block reference stats. 38510263Satgutier@umich.edu */ 38611169Sandreas.hansson@arm.com void cleanupRefs() override; 38710263Satgutier@umich.edu 38810263Satgutier@umich.edu /** 38910263Satgutier@umich.edu * Print all tags used 39010263Satgutier@umich.edu */ 39111169Sandreas.hansson@arm.com std::string print() const override; 39210263Satgutier@umich.edu 39310263Satgutier@umich.edu /** 39410263Satgutier@umich.edu * Called prior to dumping stats to compute task occupancy 39510263Satgutier@umich.edu */ 39611169Sandreas.hansson@arm.com void computeStats() override; 39710263Satgutier@umich.edu 39810263Satgutier@umich.edu /** 39910263Satgutier@umich.edu * Visit each block in the tag store and apply a visitor to the 40010263Satgutier@umich.edu * block. 40110263Satgutier@umich.edu * 40210263Satgutier@umich.edu * The visitor should be a function (or object that behaves like a 40310263Satgutier@umich.edu * function) that takes a cache block reference as its parameter 40410263Satgutier@umich.edu * and returns a bool. A visitor can request the traversal to be 40510263Satgutier@umich.edu * stopped by returning false, returning true causes it to be 40610263Satgutier@umich.edu * called for the next block in the tag store. 40710263Satgutier@umich.edu * 40810263Satgutier@umich.edu * \param visitor Visitor to call on each block. 40910263Satgutier@umich.edu */ 41011168Sandreas.hansson@arm.com void forEachBlk(CacheBlkVisitor &visitor) override { 41110263Satgutier@umich.edu for (unsigned i = 0; i < numSets * assoc; ++i) { 41210263Satgutier@umich.edu if (!visitor(blks[i])) 41310263Satgutier@umich.edu return; 41410263Satgutier@umich.edu } 41510263Satgutier@umich.edu } 41610263Satgutier@umich.edu}; 41710263Satgutier@umich.edu 41810263Satgutier@umich.edu#endif // __MEM_CACHE_TAGS_BASESETASSOC_HH__ 419