67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
/*
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* Copyright (c) 2019, Technische Universität 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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* Author: Lukas Steiner
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*/
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#include "CmdMuxOldest.h"
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#include "../../common/dramExtensions.h"
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using namespace tlm;
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CommandTuple::Type CmdMuxOldest::selectCommand(ReadyCommands &readyCommands)
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{
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auto result = readyCommands.cend();
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auto it = readyCommands.cbegin();
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uint64_t lastPayloadID = UINT64_MAX;
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uint64_t newPayloadID = 0;
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while (it != readyCommands.cend())
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{
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if (std::get<CommandTuple::Timestamp>(*it) == sc_time_stamp())
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{
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newPayloadID = DramExtension::getPayloadID(std::get<CommandTuple::Payload>(*it));
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if (newPayloadID < lastPayloadID)
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{
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lastPayloadID = newPayloadID;
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result = it;
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}
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}
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it++;
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}
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if (lastPayloadID != UINT64_MAX)
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return *result;
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else
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return CommandTuple::Type(Command::NOP, nullptr, sc_max_time());
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}
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