src/mem/ruby/storebuffer/stb_interface.cc

/*
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * 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.
 */

#include <iostream>
#include "mem/ruby/storebuffer/stb_interface.hh"

StoreBuffer * createNewSTB(uint32 id, uint32 block_bits, int storebuffer_size) {
  StoreBuffer * stb = new StoreBuffer(id, block_bits, storebuffer_size);
  return stb;
}

storebuffer_status_t handleStore (StoreBuffer * storebuffer, const RubyRequest & request) {
  assert(request.type == RubyRequestType_ST);
  if (storebuffer->storeBufferFull()){
    return WB_FULL;
  }
  else if (storebuffer->storeBufferFlushing()) {
    return WB_FLUSHING;
  }
  else {
    storebuffer->addToStoreBuffer(request);
    return WB_OK;
  }
}

uint64_t handleLoad(StoreBuffer * storebuffer, const RubyRequest & request) {
  assert(request.type == RubyRequestType_LD);
  return storebuffer->handleLoad(request);
}

#if 0
uint64_t handleAtomic(StoreBuffer * storebuffer, const RubyRequest & request) {
  // flush the store buffer
  storebuffer->flushStoreBuffer();
  // let storebuffer issue atomic
  //return storebuffer->issueAtomic(request);
}
#endif

void flushSTB(StoreBuffer * storebuffer) {
  // in in-order can't get a request to flushSTB if already flushing
  // on out of order, have to check if already flushing
  storebuffer->flushStoreBuffer();
}

void registerHitCallback(StoreBuffer * storebuffer, void (*hit_callback)(int64_t access_id)) {
  storebuffer->registerHitCallback(hit_callback);
}