mem-cache: ReplacementPolicy specific replacement data

Replacement data is specific for each replacement policy, and thus
should be instantiated differently by each policy.

Touch() and reset() do not need to be aware of CacheBlk, as they
only update its ReplacementData.

Invalidate() makes replacement policies independent of cache blocks,
by removing the awareness of the valid state.

An inheritable base ReplaceableEntry class was created to allow usage
of replacement policies with any table-like structure.

Change-Id: I998917d800fa48504ed95abffa2f1b7bfd68522b
Reviewed-on: https://gem5-review.googlesource.com/9421
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>

1 files changed, 0 insertions, 66 deletions

diff --git a/src/mem/cache/replacement_policies/base.cc b/src/mem/cache/replacement_policies/base.cc
deleted file mode 100644
index c422a75d8..000000000
--- a/src/mem/cache/replacement_policies/base.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-/**
- * Copyright (c) 2018 Inria
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Daniel Carvalho
- */
-
-/**
- * @file
- * Declaration of a common base class for cache replacement policy objects.
- * In general replacement policies try to use invalid entries as victims,
- * and if no such blocks exist the replacement policy is applied.
- */
-
-#include "mem/cache/replacement_policies/base.hh"
-
-BaseReplacementPolicy::BaseReplacementPolicy(const Params *p)
-    : SimObject(p)
-{
-}
-
-void
-BaseReplacementPolicy::touch(CacheBlk *blk)
-{
-    // Inform block has been touched
-    blk->isTouched = true;
-
-    // Update frequency counter
-    blk->refCount++;
-}
-
-void
-BaseReplacementPolicy::reset(CacheBlk *blk)
-{
-    // Inform block has been touched
-    blk->isTouched = true;
-
-    // Set insertion tick
-    blk->tickInserted = curTick();
-
-    // Reset frequency counter
-    blk->refCount = 0;
-}