kmi.hh

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/*
 * Copyright (c) 2010, 2017-2018 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.
 *
 * Copyright (c) 2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * 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
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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#ifndef __DEV_ARM_PL050_HH__
#define __DEV_ARM_PL050_HH__
 
#include <list>
 
#include "base/vnc/vncinput.hh"
#include "dev/arm/amba_device.hh"
 
namespace gem5
{
 
struct Pl050Params;
 
namespace ps2 {
class Device;
} // namespace ps2
 
class Pl050 : public AmbaIntDevice
{
  protected:
    static const int kmiCr       = 0x000;
    static const int kmiStat     = 0x004;
    static const int kmiData     = 0x008;
    static const int kmiClkDiv   = 0x00C;
    static const int kmiISR      = 0x010;
 
    BitUnion8(ControlReg)
        Bitfield<0> force_clock_low;
        Bitfield<1> force_data_low;
        Bitfield<2> enable;
        Bitfield<3> txint_enable;
        Bitfield<4> rxint_enable;
        Bitfield<5> type;
    EndBitUnion(ControlReg)
 
    
    ControlReg control;

    BitUnion8(StatusReg)
        Bitfield<0> data_in;
        Bitfield<1> clk_in;
        Bitfield<2> rxparity;
        Bitfield<3> rxbusy;
        Bitfield<4> rxfull;
        Bitfield<5> txbusy;
        Bitfield<6> txempty;
    EndBitUnion(StatusReg)
 
    StatusReg status;

    uint8_t clkdiv;
 
    BitUnion8(InterruptReg)
        Bitfield<0> rx;
        Bitfield<1> tx;
    EndBitUnion(InterruptReg)
 
    
    InterruptReg rawInterrupts;

    void setTxInt(bool value);

    void updateRxInt();

    void updateIntCtrl(InterruptReg ints, ControlReg ctrl);
 
    void setInterrupts(InterruptReg ints) { updateIntCtrl(ints, control); }
    void setControl(ControlReg ctrl) { updateIntCtrl(rawInterrupts, ctrl); }

    InterruptReg getInterrupt() const;

    ps2::Device *ps2Device;
 
  public:
    Pl050(const Pl050Params &p);
 
    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
 
    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;
};
 
} // namespace gem5
 
#endif // __DEV_ARM_PL050_HH__