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Diffstat (limited to 'src/mem/qos/policy_fixed_prio.cc')
-rw-r--r-- | src/mem/qos/policy_fixed_prio.cc | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/mem/qos/policy_fixed_prio.cc b/src/mem/qos/policy_fixed_prio.cc new file mode 100644 index 000000000..449a25d23 --- /dev/null +++ b/src/mem/qos/policy_fixed_prio.cc @@ -0,0 +1,101 @@ +/* + * 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. + * + * Author: Matteo Andreozzi + */ + +#include "mem/qos/policy_fixed_prio.hh" + +#include <algorithm> +#include <functional> + +#include "mem/request.hh" + +namespace QoS { + +FixedPriorityPolicy::FixedPriorityPolicy(const Params* p) + : Policy(p), defaultPriority(p->qos_fixed_prio_default_prio) +{} + +FixedPriorityPolicy::~FixedPriorityPolicy() +{} + +void +FixedPriorityPolicy::init() +{ +} + +void +FixedPriorityPolicy::initMasterName(std::string master, uint8_t priority) +{ + priorityMap.insert( + this->pair<std::string, uint8_t>(master, priority)); +} + +void +FixedPriorityPolicy::initMasterObj(const SimObject* master, uint8_t priority) +{ + priorityMap.insert( + this->pair<const SimObject*, uint8_t>(master, priority)); +} + +uint8_t +FixedPriorityPolicy::schedule(const MasterID mId, const uint64_t data) +{ + // Reads a packet's MasterID contained in its encapsulated request + // if a match is found in the configured priority map, returns the + // matching priority, else returns zero + + auto ret = priorityMap.find(mId); + + if (ret != priorityMap.end()) { + return ret->second; + } else { + DPRINTF(QOS, "Master %s (MasterID %d) not present in priorityMap, " + "assigning default priority %d\n", + memCtrl->system()->getMasterName(mId), + mId, defaultPriority); + return defaultPriority; + } +} + +} // namespace QoS + +QoS::FixedPriorityPolicy * +QoSFixedPriorityPolicyParams::create() +{ + return new QoS::FixedPriorityPolicy(this); +} |