i8259.hh revision 5632
15390SN/A/* 25390SN/A * Copyright (c) 2004-2005 The Regents of The University of Michigan 35390SN/A * All rights reserved. 45390SN/A * 55390SN/A * Redistribution and use in source and binary forms, with or without 65390SN/A * modification, are permitted provided that the following conditions are 75390SN/A * met: redistributions of source code must retain the above copyright 85390SN/A * notice, this list of conditions and the following disclaimer; 95390SN/A * redistributions in binary form must reproduce the above copyright 105390SN/A * notice, this list of conditions and the following disclaimer in the 115390SN/A * documentation and/or other materials provided with the distribution; 125390SN/A * neither the name of the copyright holders nor the names of its 135390SN/A * contributors may be used to endorse or promote products derived from 145390SN/A * this software without specific prior written permission. 155390SN/A * 165390SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175390SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185390SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195390SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205390SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215390SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225390SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235390SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245390SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255390SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265390SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275390SN/A * 285390SN/A * Authors: Gabe Black 295390SN/A */ 305390SN/A 315630Sgblack@eecs.umich.edu#ifndef __DEV_X86_I8259_HH__ 325630Sgblack@eecs.umich.edu#define __DEV_X86_I8259_HH__ 335390SN/A 345630Sgblack@eecs.umich.edu#include "dev/io_device.hh" 355630Sgblack@eecs.umich.edu#include "params/I8259.hh" 365390SN/A 375390SN/Anamespace X86ISA 385390SN/A{ 395390SN/A 405630Sgblack@eecs.umich.educlass I8259 : public BasicPioDevice 415390SN/A{ 425630Sgblack@eecs.umich.edu protected: 435630Sgblack@eecs.umich.edu Tick latency; 445632Sgblack@eecs.umich.edu I8259 *master; 455630Sgblack@eecs.umich.edu 465631Sgblack@eecs.umich.edu // Interrupt Request Register 475631Sgblack@eecs.umich.edu uint8_t IRR; 485631Sgblack@eecs.umich.edu // In Service Register 495631Sgblack@eecs.umich.edu uint8_t ISR; 505631Sgblack@eecs.umich.edu // Interrupt Mask Register 515631Sgblack@eecs.umich.edu uint8_t IMR; 525631Sgblack@eecs.umich.edu 535632Sgblack@eecs.umich.edu bool cascadeMode; 545632Sgblack@eecs.umich.edu // A bit vector of lines with slaves attached, or the slave id, depending 555632Sgblack@eecs.umich.edu // on if this is a master or slave PIC. 565632Sgblack@eecs.umich.edu uint8_t cascadeBits; 575632Sgblack@eecs.umich.edu 585631Sgblack@eecs.umich.edu bool edgeTriggered; 595632Sgblack@eecs.umich.edu bool readIRR; 605632Sgblack@eecs.umich.edu 615632Sgblack@eecs.umich.edu // State machine information for reading in initialization control words. 625631Sgblack@eecs.umich.edu bool expectICW4; 635631Sgblack@eecs.umich.edu int initControlWord; 645631Sgblack@eecs.umich.edu 655390SN/A public: 665630Sgblack@eecs.umich.edu typedef I8259Params Params; 675390SN/A 685630Sgblack@eecs.umich.edu const Params * 695630Sgblack@eecs.umich.edu params() const 705630Sgblack@eecs.umich.edu { 715630Sgblack@eecs.umich.edu return dynamic_cast<const Params *>(_params); 725630Sgblack@eecs.umich.edu } 735630Sgblack@eecs.umich.edu 745630Sgblack@eecs.umich.edu I8259(Params * p) : BasicPioDevice(p) 755630Sgblack@eecs.umich.edu { 765630Sgblack@eecs.umich.edu pioSize = 2; 775631Sgblack@eecs.umich.edu initControlWord = 0; 785631Sgblack@eecs.umich.edu readIRR = true; 795630Sgblack@eecs.umich.edu latency = p->pio_latency; 805630Sgblack@eecs.umich.edu master = p->master; 815630Sgblack@eecs.umich.edu } 825390SN/A 835390SN/A Tick read(PacketPtr pkt); 845390SN/A 855390SN/A Tick write(PacketPtr pkt); 865632Sgblack@eecs.umich.edu 875632Sgblack@eecs.umich.edu void signalInterrupt(int line); 885390SN/A}; 895390SN/A 905390SN/A}; // namespace X86ISA 915390SN/A 925630Sgblack@eecs.umich.edu#endif //__DEV_X86_I8259_HH__ 93