1/*
2 * Copyright (c) 2012-2014 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Erik Hallnor
41 */
42
43/**
44 * @file
45 * Definitions of a conventional tag store.
46 */
47
48#include "mem/cache/tags/base_set_assoc.hh"
49
50#include <string>
51
52#include "base/intmath.hh"
53
54BaseSetAssoc::BaseSetAssoc(const Params *p)
55 :BaseTags(p), allocAssoc(p->assoc), blks(p->size / p->block_size),
56 sequentialAccess(p->sequential_access),
57 replacementPolicy(p->replacement_policy)
58{
59 // Check parameters
60 if (blkSize < 4 || !isPowerOf2(blkSize)) {
61 fatal("Block size must be at least 4 and a power of 2");
62 }
63}
64
65void
66BaseSetAssoc::init(BaseCache* cache)
67{
68 // Set parent cache
69 setCache(cache);
70
71 // Initialize all blocks
72 for (unsigned blk_index = 0; blk_index < numBlocks; blk_index++) {
73 // Locate next cache block
74 BlkType* blk = &blks[blk_index];
75
76 // Link block to indexing policy
77 indexingPolicy->setEntry(blk, blk_index);
78
79 // Associate a data chunk to the block
80 blk->data = &dataBlks[blkSize*blk_index];
81
82 // Associate a replacement data entry to the block
83 blk->replacementData = replacementPolicy->instantiateEntry();
84 }
85}
86
87void
88BaseSetAssoc::invalidate(CacheBlk *blk)
89{
90 BaseTags::invalidate(blk);
91
92 // Decrease the number of tags in use
93 tagsInUse--;
94
95 // Invalidate replacement data
96 replacementPolicy->invalidate(blk->replacementData);
97}
98
99BaseSetAssoc *
100BaseSetAssocParams::create()
101{
102 // There must be a indexing policy
103 fatal_if(!indexing_policy, "An indexing policy is required");
104
105 return new BaseSetAssoc(this);
106}