7371e46822
The original backdoor implementation is incorrect. We use simply fallback to default (disable backdoor) as backdoor across threads is not thread-safe in most of cases. Change-Id: Ia39be0dda4f16917cc3565eb5b012270e6d7697a Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67531 Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Yu-hsin Wang <yuhsingw@google.com>
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/*
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* Copyright 2022 Google, LLC.
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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: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* 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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* neither the name of the copyright holders 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
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __MEM_THREAD_BRIDGE_HH__
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#define __MEM_THREAD_BRIDGE_HH__
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#include "mem/port.hh"
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#include "params/ThreadBridge.hh"
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#include "sim/sim_object.hh"
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namespace gem5
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{
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class ThreadBridge : public SimObject
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{
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public:
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explicit ThreadBridge(const ThreadBridgeParams &p);
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Port &getPort(const std::string &if_name,
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PortID idx = InvalidPortID) override;
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private:
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class IncomingPort : public ResponsePort
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{
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public:
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IncomingPort(const std::string &name, ThreadBridge &device);
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AddrRangeList getAddrRanges() const override;
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// TimingResponseProtocol
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bool recvTimingReq(PacketPtr pkt) override;
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void recvRespRetry() override;
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// AtomicResponseProtocol
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Tick recvAtomic(PacketPtr pkt) override;
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// FunctionalResponseProtocol
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void recvFunctional(PacketPtr pkt) override;
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private:
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ThreadBridge &device_;
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};
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class OutgoingPort : public RequestPort
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{
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public:
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OutgoingPort(const std::string &name, ThreadBridge &device);
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void recvRangeChange() override;
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// TimingRequestProtocol
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bool recvTimingResp(PacketPtr pkt) override;
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void recvReqRetry() override;
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private:
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ThreadBridge &device_;
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};
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IncomingPort in_port_;
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OutgoingPort out_port_;
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};
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} // namespace gem5
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#endif // __MEM_THREAD_BRIDGE_HH__
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