super_blk.hh revision 13938:14f80b6b37c1 
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 * Definition of a simple superblock class. Each superblock consists of a
33 * number of compressed cache blocks limited by the maximum compression
34 * factor that may or may not be present in the cache.
35 */
36
37#ifndef __MEM_CACHE_TAGS_SUPER_BLK_HH__
38#define __MEM_CACHE_TAGS_SUPER_BLK_HH__
39
40#include "mem/cache/tags/sector_blk.hh"
41
42class SuperBlk;
43
44/**
45 * A superblock is composed of sub-blocks, and each sub-block has information
46 * regarding its superblock and a pointer to its superblock tag. A superblock
47 * can be seen as a variation of a sector block, and therefore we use a sector
48 * nomenclature.
49 */
50class CompressionBlk : public SectorSubBlk
51{
52  public:
53    CompressionBlk();
54    CompressionBlk(const CompressionBlk&) = delete;
55    CompressionBlk& operator=(const CompressionBlk&) = delete;
56    ~CompressionBlk() {};
57};
58
59/**
60 * A basic compression superblock.
61 * Contains the tag and a list of blocks associated to this superblock.
62 */
63class SuperBlk : public SectorBlk
64{
65  public:
66    SuperBlk() : SectorBlk() {}
67    SuperBlk(const SuperBlk&) = delete;
68    SuperBlk& operator=(const SuperBlk&) = delete;
69    ~SuperBlk() {};
70};
71
72#endif //__MEM_CACHE_TAGS_SUPER_BLK_HH__
73