3a19fa4d8d
The device still can't actually do any DMAing, but now it's interface is plumbed up so that it should work as expected up to the point where it's asked to DMA something. Then it will panic as before. Change-Id: I06a163a9a963bf87405e24fc5ceebe14f186adfd Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55248 Reviewed-by: Gabe Black <gabe.black@gmail.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
/*
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* Copyright (c) 2008 The Regents of The University of Michigan
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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: 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 __DEV_X86_I8237_HH__
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#define __DEV_X86_I8237_HH__
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#include <array>
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#include "dev/io_device.hh"
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#include "dev/reg_bank.hh"
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#include "params/I8237.hh"
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namespace gem5
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{
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namespace X86ISA
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{
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class I8237 : public BasicPioDevice
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{
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public:
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using Register = RegisterBankLE::Register8;
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protected:
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Tick latency;
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uint8_t maskVal;
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//XXX These should be serialized.
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uint8_t requestVal;
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uint8_t commandVal;
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uint8_t statusVal;
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uint8_t tempVal;
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bool highByte;
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RegisterBankLE regs;
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struct Channel
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{
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class ChannelAddrReg : public Register
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{
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public:
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ChannelAddrReg(Channel &);
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};
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class ChannelRemainingReg : public Register
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{
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public:
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ChannelRemainingReg(Channel &);
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};
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int number;
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//XXX These should be serialized.
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uint8_t mode = 0x0;
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ChannelAddrReg addrReg;
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ChannelRemainingReg remainingReg;
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Channel(int _num) : number(_num), addrReg(*this), remainingReg(*this)
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{}
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};
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class WriteOnlyReg : public Register
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{
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public:
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WriteOnlyReg(const std::string &new_name, Addr offset);
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};
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std::array<Channel, 4> channels;
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Register statusCommandReg;
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WriteOnlyReg requestReg;
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WriteOnlyReg setMaskBitReg;
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WriteOnlyReg modeReg;
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WriteOnlyReg clearFlipFlopReg;
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Register temporaryMasterClearReg;
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WriteOnlyReg clearMaskReg;
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WriteOnlyReg writeMaskReg;
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void reset();
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void setMaskBit(Register ®, const uint8_t &command);
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void setRequestBit(Register ®, const uint8_t &command);
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public:
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using Params = I8237Params;
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I8237(const Params &p);
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Tick read(PacketPtr pkt) override;
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Tick write(PacketPtr pkt) override;
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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} // namespace X86ISA
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} // namespace gem5
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#endif //__DEV_X86_I8237_HH__
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