1/** 2 * Copyright (c) 2018 Inria 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Daniel Carvalho 29 */ 30 31/** @file 32 * Implementation of a simple sector block class. Each sector consists of a 33 * sequence of cache blocks that may or may not be present in the cache. 34 */ 35 36#include "mem/cache/tags/sector_blk.hh" 37 38#include <cassert> 39 40#include "base/cprintf.hh" 41#include "base/logging.hh" 42 43void 44SectorSubBlk::setSectorBlock(SectorBlk* sector_blk) 45{ 46 assert(sector_blk != nullptr); 47 _sectorBlk = sector_blk; 48} 49 50const SectorBlk* 51SectorSubBlk::getSectorBlock() const 52{ 53 return _sectorBlk; 54} 55 56void 57SectorSubBlk::setSectorOffset(const int sector_offset) 58{ 59 _sectorOffset = sector_offset; 60} 61 62int 63SectorSubBlk::getSectorOffset() const 64{ 65 return _sectorOffset; 66} 67 68Addr 69SectorSubBlk::getTag() const 70{ 71 return _sectorBlk->getTag(); 72} 73 74void 75SectorSubBlk::setValid() 76{ 77 CacheBlk::setValid(); 78 _sectorBlk->validateSubBlk(); 79} 80 81void 82SectorSubBlk::setSecure() 83{ 84 CacheBlk::setSecure(); 85 _sectorBlk->setSecure(); 86} 87 88void 89SectorSubBlk::invalidate() 90{ 91 CacheBlk::invalidate(); 92 _sectorBlk->invalidateSubBlk(); 93} 94 95void 96SectorSubBlk::insert(const Addr tag, const bool is_secure, 97 const int src_master_ID, const uint32_t task_ID) 98{ 99 // Make sure it is not overwriting another sector 100 panic_if((_sectorBlk && _sectorBlk->isValid()) && 101 ((_sectorBlk->getTag() != tag) || 102 (_sectorBlk->isSecure() != is_secure)), 103 "Overwriting valid sector!"); 104 105 CacheBlk::insert(tag, is_secure, src_master_ID, task_ID); 106 107 // Set sector tag 108 _sectorBlk->setTag(tag); 109} 110 111std::string 112SectorSubBlk::print() const 113{ 114 return csprintf("%s sector offset: %#x", CacheBlk::print(), 115 getSectorOffset()); 116} 117 118SectorBlk::SectorBlk() 119 : ReplaceableEntry(), _tag(MaxAddr), _validCounter(0), _secureBit(false) 120{ 121} 122 123bool 124SectorBlk::isValid() const 125{ 126 // If any of the blocks in the sector is valid, so is the sector 127 return _validCounter > 0; 128} 129 130bool 131SectorBlk::isSecure() const 132{ 133 // If any of the valid blocks in the sector is secure, so is the sector 134 return _secureBit; 135} 136 137void 138SectorBlk::setTag(const Addr tag) 139{ 140 _tag = tag; 141} 142 143Addr 144SectorBlk::getTag() const 145{ 146 return _tag; 147} 148 149void 150SectorBlk::validateSubBlk() 151{ 152 _validCounter++; 153} 154 155void 156SectorBlk::invalidateSubBlk() 157{ 158 // If all sub-blocks have been invalidated, the sector becomes invalid, 159 // so clear secure bit 160 if (--_validCounter == 0) { 161 _secureBit = false; 162 } 163} 164 165void 166SectorBlk::setSecure() 167{ 168 _secureBit = true; 169} 170 171void 172SectorBlk::setPosition(const uint32_t set, const uint32_t way) 173{ 174 ReplaceableEntry::setPosition(set, way); 175 for (auto& blk : blks) { 176 blk->setPosition(set, way); 177 } 178} 179