123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/*
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* Copyright (c) 2010 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2005 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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* Authors: William Wang
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*/
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/** @file
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* Implementiation of a PL050 KMI
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*/
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#ifndef __DEV_ARM_PL050_HH__
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#define __DEV_ARM_PL050_HH__
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#include "base/range.hh"
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#include "dev/io_device.hh"
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#include "params/Pl050.hh"
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class Gic;
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class Pl050 : public AmbaDevice
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{
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protected:
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static const int kmiCr = 0x000;
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static const int kmiStat = 0x004;
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static const int kmiData = 0x008;
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static const int kmiClkDiv = 0x00C;
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static const int kmiISR = 0x010;
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// control register
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uint8_t control;
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// status register
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uint8_t status;
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// received data (read) or data to be transmitted (write)
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uint8_t kmidata;
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// clock divisor register
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uint8_t clkdiv;
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BitUnion8(IntReg)
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Bitfield<0> txintr;
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Bitfield<1> rxintr;
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EndBitUnion(IntReg)
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/** interrupt mask register. */
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IntReg intreg;
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/** Interrupt number to generate */
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int intNum;
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/** Gic to use for interrupting */
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Gic *gic;
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/** Delay before interrupting */
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Tick intDelay;
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/** Function to generate interrupt */
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void generateInterrupt();
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/** Wrapper to create an event out of the thing */
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EventWrapper<Pl050, &Pl050::generateInterrupt> intEvent;
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public:
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typedef Pl050Params Params;
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const Params *
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params() const
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{
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return dynamic_cast<const Params *>(_params);
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}
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Pl050(const Params *p);
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virtual Tick read(PacketPtr pkt);
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virtual Tick write(PacketPtr pkt);
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/**
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* Return if we have an interrupt pending
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* @return interrupt status
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* @todo fix me when implementation improves
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*/
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virtual bool intStatus() { return false; }
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};
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#endif
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