8723b08dbf
Transaction Level Modeling (TLM2.0) is widely used in industry for creating virtual platforms (IEEE 1666 SystemC). This patch contains a standard compliant implementation of an external gem5 port, that enables the usage of gem5 as a TLM initiator component in SystemC based virtual platforms. Both TLM coding paradigms loosely timed (b_transport) and aproximately timed (nb_transport) are supported. Compared to the original patch a TLM memory manager was added. Furthermore, the transaction object was removed and for each TLM payload a PacketPointer that points to the original gem5 packet is added as an TLM extension. For event handling single events are now created. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/*
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* Copyright (c) 2015, University of Kaiserslautern
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors:
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* Robert Gernhardt
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* Matthias Jung
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*/
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#include <iostream>
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#include "sc_mm.hh"
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using namespace std;
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MemoryManager::MemoryManager(): numberOfAllocations(0), numberOfFrees(0)
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{
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}
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MemoryManager::~MemoryManager()
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{
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for(gp* payload: freePayloads) {
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delete payload;
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numberOfFrees++;
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}
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}
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gp*
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MemoryManager::allocate()
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{
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if(freePayloads.empty()) {
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numberOfAllocations++;
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return new gp(this);
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} else {
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gp* result = freePayloads.back();
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freePayloads.pop_back();
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return result;
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}
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}
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void
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MemoryManager::free(gp* payload)
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{
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payload->reset(); //clears all extensions
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freePayloads.push_back(payload);
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}
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