63fdabf191
pretty close to compiling w/ suns compiler briefly: add dummy return after panic()/fatal() split out flags by compiler vendor include cstring and cmath where appropriate use std namespace for string ops SConstruct: Add code to detect compiler and choose cflags based on detected compiler Fix zlib check to work with suncc src/SConscript: split out flags by compiler vendor src/arch/sparc/isa/decoder.isa: use correct namespace for sqrt src/arch/sparc/isa/formats/basic.isa: add dummy return around panic src/arch/sparc/isa/formats/integerop.isa: use correct namespace for stringops src/arch/sparc/isa/includes.isa: include cstring and cmath where appropriate src/arch/sparc/isa_traits.hh: remove dangling comma src/arch/sparc/system.cc: dummy return to make sun cc front end happy src/arch/sparc/tlb.cc: src/base/compression/lzss_compression.cc: use std namespace for string ops src/arch/sparc/utility.hh: no reason to say something is unsigned unsigned int src/base/compression/null_compression.hh: dummy returns to for suncc front end src/base/cprintf.hh: use standard variadic argument syntax instead of gnuc specefic renaming src/base/hashmap.hh: don't need to define hash for suncc src/base/hostinfo.cc: need stdio.h for sprintf src/base/loader/object_file.cc: munmap is in std namespace not null src/base/misc.hh: use M5 generic noreturn macros use standard variadic macro __VA_ARGS__ src/base/pollevent.cc: we need file.h for file flags src/base/random.cc: mess with include files to make suncc happy src/base/remote_gdb.cc: malloc memory for function instead of having a non-constant in an array size src/base/statistics.hh: use std namespace for floor src/base/stats/text.cc: include math.h for rint (cmath won't work) src/base/time.cc: use suncc version of ctime_r src/base/time.hh: change macro to work with both gcc and suncc src/base/timebuf.hh: include cstring from memset and use std:: src/base/trace.hh: change variadic macros to be normal format src/cpu/SConscript: add dummy returns where appropriate src/cpu/activity.cc: include cstring for memset src/cpu/exetrace.hh: include cstring fro memcpy src/cpu/simple/base.hh: add dummy return for panic src/dev/baddev.cc: src/dev/pciconfigall.cc: src/dev/platform.cc: src/dev/sparc/t1000.cc: add dummy return where appropriate src/dev/ide_atareg.h: make define work for both gnuc and suncc src/dev/io_device.hh: add dummy returns where approirate src/dev/pcidev.hh: src/mem/cache/cache_impl.hh: src/mem/cache/miss/blocking_buffer.cc: src/mem/cache/tags/lru.hh: src/mem/cache/tags/split.hh: src/mem/cache/tags/split_lifo.hh: src/mem/cache/tags/split_lru.hh: src/mem/dram.cc: src/mem/packet.cc: src/mem/port.cc: include cstring for string ops src/dev/sparc/mm_disk.cc: add dummy return where appropriate include cstring for string ops src/mem/cache/miss/blocking_buffer.hh: src/mem/port.hh: Add dummy return where appropriate src/mem/cache/tags/iic.cc: cast hastSets to double for log() call src/mem/physical.cc: cast pmemAddr to char* for munmap src/sim/byteswap.hh: make define work for suncc and gnuc --HG-- extra : convert_revision : ef8a1f1064e43b6c39838a85c01aee4f795497bd
303 lines
8.5 KiB
C++
303 lines
8.5 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Erik Hallnor
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*/
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/**
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* @file
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* Declaration of a LRU tag store.
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*/
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#ifndef __LRU_HH__
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#define __LRU_HH__
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#include <cstring>
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#include <list>
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#include "mem/cache/cache_blk.hh" // base class
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#include "mem/packet.hh" // for inlined functions
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#include <assert.h>
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#include "mem/cache/tags/base_tags.hh"
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class BaseCache;
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/**
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* LRU cache block.
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*/
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class LRUBlk : public CacheBlk {
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public:
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/** Has this block been touched? Used to aid calculation of warmup time. */
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bool isTouched;
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};
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/**
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* An associative set of cache blocks.
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*/
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class CacheSet
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{
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public:
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/** The associativity of this set. */
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int assoc;
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/** Cache blocks in this set, maintained in LRU order 0 = MRU. */
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LRUBlk **blks;
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/**
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* Find a block matching the tag in this set.
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* @param asid The address space ID.
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* @param tag The Tag to find.
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* @return Pointer to the block if found.
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*/
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LRUBlk* findBlk(Addr tag) const;
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/**
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* Move the given block to the head of the list.
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* @param blk The block to move.
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*/
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void moveToHead(LRUBlk *blk);
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};
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/**
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* A LRU cache tag store.
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*/
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class LRU : public BaseTags
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{
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public:
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/** Typedef the block type used in this tag store. */
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typedef LRUBlk BlkType;
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/** Typedef for a list of pointers to the local block class. */
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typedef std::list<LRUBlk*> BlkList;
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protected:
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/** The number of sets in the cache. */
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const int numSets;
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/** The number of bytes in a block. */
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const int blkSize;
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/** The associativity of the cache. */
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const int assoc;
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/** The hit latency. */
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const int hitLatency;
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/** The cache sets. */
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CacheSet *sets;
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/** The cache blocks. */
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LRUBlk *blks;
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/** The data blocks, 1 per cache block. */
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uint8_t *dataBlks;
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/** The amount to shift the address to get the set. */
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int setShift;
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/** The amount to shift the address to get the tag. */
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int tagShift;
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/** Mask out all bits that aren't part of the set index. */
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unsigned setMask;
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/** Mask out all bits that aren't part of the block offset. */
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unsigned blkMask;
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public:
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/**
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* Construct and initialize this tag store.
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* @param _numSets The number of sets in the cache.
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* @param _blkSize The number of bytes in a block.
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* @param _assoc The associativity of the cache.
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* @param _hit_latency The latency in cycles for a hit.
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*/
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LRU(int _numSets, int _blkSize, int _assoc, int _hit_latency);
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/**
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* Destructor
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*/
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virtual ~LRU();
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/**
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* Return the block size.
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* @return the block size.
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*/
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int getBlockSize()
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{
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return blkSize;
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}
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/**
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* Return the subblock size. In the case of LRU it is always the block
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* size.
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* @return The block size.
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*/
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int getSubBlockSize()
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{
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return blkSize;
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}
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/**
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* Search for the address in the cache.
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* @param asid The address space ID.
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* @param addr The address to find.
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* @return True if the address is in the cache.
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*/
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bool probe(Addr addr) const;
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/**
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* Invalidate the given block.
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* @param blk The block to invalidate.
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*/
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void invalidateBlk(BlkType *blk);
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/**
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* Finds the given address in the cache and update replacement data.
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* Returns the access latency as a side effect.
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* @param addr The address to find.
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* @param asid The address space ID.
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* @param lat The access latency.
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* @return Pointer to the cache block if found.
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*/
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LRUBlk* findBlock(Addr addr, int &lat);
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/**
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* Finds the given address in the cache, do not update replacement data.
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* @param addr The address to find.
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* @param asid The address space ID.
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* @return Pointer to the cache block if found.
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*/
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LRUBlk* findBlock(Addr addr) const;
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/**
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* Find a replacement block for the address provided.
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* @param pkt The request to a find a replacement candidate for.
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* @param writebacks List for any writebacks to be performed.
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* @param compress_blocks List of blocks to compress, for adaptive comp.
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* @return The block to place the replacement in.
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*/
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LRUBlk* findReplacement(PacketPtr &pkt, PacketList &writebacks,
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BlkList &compress_blocks);
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/**
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* Generate the tag from the given address.
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* @param addr The address to get the tag from.
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* @return The tag of the address.
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*/
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Addr extractTag(Addr addr) const
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{
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return (addr >> tagShift);
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}
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/**
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* Generate the tag from the given address.
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* @param addr The address to get the tag from.
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* @param blk Ignored.
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* @return The tag of the address.
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*/
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Addr extractTag(Addr addr, LRUBlk *blk) const
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{
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return (addr >> tagShift);
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}
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/**
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* Calculate the set index from the address.
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* @param addr The address to get the set from.
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* @return The set index of the address.
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*/
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int extractSet(Addr addr) const
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{
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return ((addr >> setShift) & setMask);
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}
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/**
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* Get the block offset from an address.
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* @param addr The address to get the offset of.
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* @return The block offset.
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*/
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int extractBlkOffset(Addr addr) const
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{
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return (addr & blkMask);
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}
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/**
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* Align an address to the block size.
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* @param addr the address to align.
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* @return The block address.
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*/
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Addr blkAlign(Addr addr) const
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{
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return (addr & ~(Addr)blkMask);
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}
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/**
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* Regenerate the block address from the tag.
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* @param tag The tag of the block.
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* @param set The set of the block.
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* @return The block address.
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*/
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Addr regenerateBlkAddr(Addr tag, unsigned set) const
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{
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return ((tag << tagShift) | ((Addr)set << setShift));
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}
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/**
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* Return the hit latency.
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* @return the hit latency.
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*/
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int getHitLatency() const
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{
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return hitLatency;
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}
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/**
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* Read the data out of the internal storage of the given cache block.
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* @param blk The cache block to read.
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* @param data The buffer to read the data into.
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* @return The cache block's data.
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*/
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void readData(LRUBlk *blk, uint8_t *data)
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{
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std::memcpy(data, blk->data, blk->size);
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}
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/**
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* Write data into the internal storage of the given cache block. Since in
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* LRU does not store data differently this just needs to update the size.
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* @param blk The cache block to write.
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* @param data The data to write.
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* @param size The number of bytes to write.
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* @param writebacks A list for any writebacks to be performed. May be
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* needed when writing to a compressed block.
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*/
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void writeData(LRUBlk *blk, uint8_t *data, int size,
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PacketList & writebacks)
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{
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assert(size <= blkSize);
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blk->size = size;
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}
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/**
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* Called at end of simulation to complete average block reference stats.
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*/
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virtual void cleanupRefs();
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};
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#endif
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