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Diffstat (limited to 'src/mem/qos/turnaround_policy_ideal.hh')
| -rw-r--r-- | src/mem/qos/turnaround_policy_ideal.hh | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/mem/qos/turnaround_policy_ideal.hh b/src/mem/qos/turnaround_policy_ideal.hh new file mode 100644 index 000000000..e28c55cf3 --- /dev/null +++ b/src/mem/qos/turnaround_policy_ideal.hh @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2018 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * 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: Matteo Andreozzi + */ + +#ifndef __MEM_QOS_TURNAROUND_POLICY_IDEAL_HH_ +#define __MEM_QOS_TURNAROUND_POLICY_IDEAL_HH_ + +#include "mem/qos/turnaround_policy.hh" + +namespace QoS { + +/** + * Ideal QoS Bus Turnaround policy + * + * Selects bus state based purely on highest QoS priority + * queue with at least one packet. Tie breaks across read + * and write queues are resolved by selecting current bus + * state. + */ +class TurnaroundPolicyIdeal: public TurnaroundPolicy +{ + public: + TurnaroundPolicyIdeal(const Params*); + + virtual ~TurnaroundPolicyIdeal(); + + /** + * Bus Selection function. + * + * @return selected bus state + */ + virtual MemCtrl::BusState selectBusState() override; +}; + +} // namespace QoS + +#endif /* __MEM_QOS_TURNAROUND_POLICY_IDEAL_HH_ */ |