abc76f20cb
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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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: Ali Saidi
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*/
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/** @file
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* Defines a 8250 UART
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*/
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#ifndef __DEV_UART8250_HH__
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#define __DEV_UART8250_HH__
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#include "base/range.hh"
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#include "dev/io_device.hh"
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#include "dev/uart.hh"
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#include "params/Uart8250.hh"
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/* UART8250 Interrupt ID Register
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* bit 0 Interrupt Pending 0 = true, 1 = false
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* bit 2:1 ID of highest priority interrupt
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* bit 7:3 zeroes
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*/
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const uint8_t IIR_NOPEND = 0x1;
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// Interrupt IDs
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const uint8_t IIR_MODEM = 0x00; /* Modem Status (lowest priority) */
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const uint8_t IIR_TXID = 0x02; /* Tx Data */
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const uint8_t IIR_RXID = 0x04; /* Rx Data */
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const uint8_t IIR_LINE = 0x06; /* Rx Line Status (highest priority)*/
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const uint8_t UART_IER_RDI = 0x01;
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const uint8_t UART_IER_THRI = 0x02;
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const uint8_t UART_IER_RLSI = 0x04;
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const uint8_t UART_LSR_TEMT = 0x40;
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const uint8_t UART_LSR_THRE = 0x20;
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const uint8_t UART_LSR_DR = 0x01;
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const uint8_t UART_MCR_LOOP = 0x10;
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class SimConsole;
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class Platform;
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class Uart8250 : public Uart
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{
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protected:
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uint8_t IER, DLAB, LCR, MCR;
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Tick lastTxInt;
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class IntrEvent : public Event
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{
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protected:
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Uart8250 *uart;
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int intrBit;
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public:
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IntrEvent(Uart8250 *u, int bit);
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virtual void process();
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virtual const char *description();
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void scheduleIntr();
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};
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IntrEvent txIntrEvent;
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IntrEvent rxIntrEvent;
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public:
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typedef Uart8250Params 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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Uart8250(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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virtual void addressRanges(AddrRangeList &range_list);
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/**
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* Inform the uart that there is data available.
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*/
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virtual void dataAvailable();
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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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*/
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virtual bool intStatus() { return status ? true : false; }
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virtual void serialize(std::ostream &os);
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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#endif // __TSUNAMI_UART_HH__
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