| /* |
| * Copyright (c) 2013, 2018-2019 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. |
| */ |
| |
| #ifndef __DEV_ARM_SMMU_V3_PROC_HH__ |
| #define __DEV_ARM_SMMU_V3_PROC_HH__ |
| |
| #include <list> |
| #include <queue> |
| #include <string> |
| |
| #include "base/coroutine.hh" |
| #include "base/types.hh" |
| #include "mem/packet.hh" |
| |
| namespace gem5 |
| { |
| |
| class SMMUv3DeviceInterface; |
| |
| /* |
| * The meaning of these becomes apparent when you |
| * look at runProcessAtomic()/runProcessTiming(). |
| */ |
| enum SMMUActionType |
| { |
| ACTION_INITIAL_NOP, |
| ACTION_SEND_REQ, |
| ACTION_SEND_REQ_FINAL, |
| ACTION_SEND_RESP, |
| ACTION_SEND_RESP_ATS, |
| ACTION_DELAY, |
| ACTION_SLEEP, |
| ACTION_TERMINATE, |
| }; |
| |
| struct SMMUAction |
| { |
| SMMUActionType type; |
| PacketPtr pkt; |
| SMMUv3DeviceInterface *ifc; |
| Tick delay; |
| }; |
| |
| class SMMUv3; |
| class SMMUProcess; |
| |
| struct SMMUSemaphore |
| { |
| explicit SMMUSemaphore(unsigned _max) : |
| count(_max), max(_max) |
| {} |
| |
| unsigned count; |
| unsigned max; |
| std::queue<SMMUProcess *> queue; |
| }; |
| |
| struct SMMUSignal |
| { |
| std::list<SMMUProcess *> waiting; |
| }; |
| |
| class SMMUProcess : public Packet::SenderState |
| { |
| private: |
| typedef gem5::Coroutine<PacketPtr, SMMUAction> Coroutine; |
| |
| Coroutine *coroutine; |
| std::string myName; |
| |
| void wakeup(); |
| |
| protected: |
| typedef Coroutine::CallerType Yield; |
| |
| SMMUv3 &smmu; |
| |
| void reinit(); |
| |
| virtual void main(Yield &yield) = 0; |
| |
| void doRead(Yield &yield, Addr addr, void *ptr, size_t size); |
| void doWrite(Yield &yield, Addr addr, const void *ptr, size_t size); |
| void doDelay(Yield &yield, Cycles cycles); |
| void doSleep(Yield &yield); |
| |
| void doSemaphoreDown(Yield &yield, SMMUSemaphore &sem); |
| void doSemaphoreUp(SMMUSemaphore &sem); |
| |
| void doWaitForSignal(Yield &yield, SMMUSignal &sig); |
| void doBroadcastSignal(SMMUSignal &sig); |
| |
| void scheduleWakeup(Tick when); |
| |
| public: |
| SMMUProcess(const std::string &name, SMMUv3 &_smmu); |
| virtual ~SMMUProcess(); |
| |
| SMMUAction run(PacketPtr pkt); |
| |
| const std::string name() const { return myName; }; |
| }; |
| |
| } // namespace gem5 |
| |
| #endif /* __DEV_ARM_SMMU_V3_PROC_HH__ */ |