src/mem/cache/sector_blk.cc

   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/sector_blk.hh"
  37
  38 #include <cassert>
  39
  40 #include "base/cprintf.hh"
  41 #include "base/logging.hh"
  42
  43 void
  44 SectorSubBlk::setSectorBlock(SectorBlk* sector_blk)
  45 {
  46     assert(sector_blk != nullptr);
  47     _sectorBlk = sector_blk;
  48 }
  49
  50 const SectorBlk*
  51 SectorSubBlk::getSectorBlock() const
  52 {
  53     return _sectorBlk;
  54 }
  55
  56 void
  57 SectorSubBlk::setSectorOffset(const int sector_offset)
  58 {
  59     _sectorOffset = sector_offset;
  60 }
  61
  62 int
  63 SectorSubBlk::getSectorOffset() const
  64 {
  65     return _sectorOffset;
  66 }
  67
  68 Addr
  69 SectorSubBlk::getTag() const
  70 {
  71     return _sectorBlk->getTag();
  72 }
  73
  74 void
  75 SectorSubBlk::insert(const Addr tag, const bool is_secure,
  76                      const int src_master_ID, const uint32_t task_ID)
  77 {
  78     // Make sure it is not overwriting another sector
  79     panic_if((_sectorBlk && _sectorBlk->isValid()) &&
  80              ((_sectorBlk->getTag() != tag) ||
  81               (_sectorBlk->isSecure() != is_secure)),
  82               "Overwriting valid sector!");
  83
  84     CacheBlk::insert(tag, is_secure, src_master_ID, task_ID);
  85
  86     // Set sector tag
  87     _sectorBlk->setTag(tag);
  88 }
  89
  90 std::string
  91 SectorSubBlk::print() const
  92 {
  93     return csprintf("%s sector offset: %#x", CacheBlk::print(),
  94                     getSectorOffset());
  95 }
  96
  97 bool
  98 SectorBlk::isValid() const
  99 {
 100     // If any of the blocks in the sector is valid, so is the sector
 101     for (const auto& blk : blks) {
 102         if (blk->isValid()) {
 103             return true;
 104         }
 105     }
 106     return false;
 107 }
 108
 109 bool
 110 SectorBlk::isSecure() const
 111 {
 112     // If any of the valid blocks in the sector is secure, so is the sector
 113     for (const auto& blk : blks) {
 114         if (blk->isValid()) {
 115             return blk->isSecure();
 116         }
 117     }
 118     return false;
 119 }
 120
 121 void
 122 SectorBlk::setTag(const Addr tag)
 123 {
 124     _tag = tag;
 125 }
 126
 127 Addr
 128 SectorBlk::getTag() const
 129 {
 130     return _tag;
 131 }