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author | Matthias Jung <jungma@eit.uni-kl.de> | 2015-08-03 23:08:40 -0500 |
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committer | Matthias Jung <jungma@eit.uni-kl.de> | 2015-08-03 23:08:40 -0500 |
commit | 8723b08dbf254bc436eac2b2ddf86efa02fc4274 (patch) | |
tree | 9a11d4b9112f3957693f1a6d79293bd94f15b712 /util/tlm/sc_mm.cc | |
parent | c375870abde01fa8d693e4dd95975b83c82a280d (diff) | |
download | gem5-8723b08dbf254bc436eac2b2ddf86efa02fc4274.tar.xz |
misc: Coupling gem5 with SystemC TLM2.0
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>
Diffstat (limited to 'util/tlm/sc_mm.cc')
-rw-r--r-- | util/tlm/sc_mm.cc | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/util/tlm/sc_mm.cc b/util/tlm/sc_mm.cc new file mode 100644 index 000000000..509d429c2 --- /dev/null +++ b/util/tlm/sc_mm.cc @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2015, University of Kaiserslautern + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 3. Neither the name of the copyright holder 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 HOLDER + * 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: + * Robert Gernhardt + * Matthias Jung + */ + +#include <iostream> + +#include "sc_mm.hh" + +using namespace std; + +MemoryManager::MemoryManager(): numberOfAllocations(0), numberOfFrees(0) +{ + +} + +MemoryManager::~MemoryManager() +{ + for(gp* payload: freePayloads) { + delete payload; + numberOfFrees++; + } +} + +gp* +MemoryManager::allocate() +{ + if(freePayloads.empty()) { + numberOfAllocations++; + return new gp(this); + } else { + gp* result = freePayloads.back(); + freePayloads.pop_back(); + return result; + } +} + +void +MemoryManager::free(gp* payload) +{ + payload->reset(); //clears all extensions + freePayloads.push_back(payload); +} |