15390SN/A/* 25443SN/A * Copyright (c) 2008 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 3111793Sbrandon.potter@amd.com#include "dev/x86/i8254.hh" 3211793Sbrandon.potter@amd.com 338232Snate@binkert.org#include "debug/I8254.hh" 345642Sgblack@eecs.umich.edu#include "dev/x86/intdev.hh" 355636Sgblack@eecs.umich.edu#include "mem/packet.hh" 365390SN/A#include "mem/packet_access.hh" 375390SN/A 385642Sgblack@eecs.umich.eduvoid 395642Sgblack@eecs.umich.eduX86ISA::I8254::counterInterrupt(unsigned int num) 405642Sgblack@eecs.umich.edu{ 415642Sgblack@eecs.umich.edu DPRINTF(I8254, "Interrupt from counter %d.\n", num); 425827Sgblack@eecs.umich.edu if (num == 0) { 4314290Sgabeblack@google.com for (auto *wire: intPin) { 4414290Sgabeblack@google.com wire->raise(); 4514290Sgabeblack@google.com //XXX This is a hack. 4614290Sgabeblack@google.com wire->lower(); 4714290Sgabeblack@google.com } 485827Sgblack@eecs.umich.edu } 495642Sgblack@eecs.umich.edu} 505642Sgblack@eecs.umich.edu 515390SN/ATick 525390SN/AX86ISA::I8254::read(PacketPtr pkt) 535390SN/A{ 545390SN/A assert(pkt->getSize() == 1); 555636Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 565636Sgblack@eecs.umich.edu if (offset < 3) { 5713229Sgabeblack@google.com pkt->setLE(pit.readCounter(offset)); 585636Sgblack@eecs.umich.edu } else if (offset == 3) { 5913229Sgabeblack@google.com pkt->setLE(uint8_t(-1)); 605636Sgblack@eecs.umich.edu } else { 615390SN/A panic("Read from undefined i8254 register.\n"); 625390SN/A } 635898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 645443SN/A return latency; 655390SN/A} 665390SN/A 675390SN/ATick 685390SN/AX86ISA::I8254::write(PacketPtr pkt) 695390SN/A{ 705390SN/A assert(pkt->getSize() == 1); 715636Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 725636Sgblack@eecs.umich.edu if (offset < 3) { 7313229Sgabeblack@google.com pit.writeCounter(offset, pkt->getLE<uint8_t>()); 745636Sgblack@eecs.umich.edu } else if (offset == 3) { 7513229Sgabeblack@google.com pit.writeControl(pkt->getLE<uint8_t>()); 765636Sgblack@eecs.umich.edu } else { 775390SN/A panic("Write to undefined i8254 register.\n"); 785390SN/A } 795898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 805443SN/A return latency; 815390SN/A} 825636Sgblack@eecs.umich.edu 837903Shestness@cs.utexas.eduvoid 8410905Sandreas.sandberg@arm.comX86ISA::I8254::serialize(CheckpointOut &cp) const 857903Shestness@cs.utexas.edu{ 8610905Sandreas.sandberg@arm.com pit.serialize("pit", cp); 877903Shestness@cs.utexas.edu} 887903Shestness@cs.utexas.edu 897903Shestness@cs.utexas.eduvoid 9010905Sandreas.sandberg@arm.comX86ISA::I8254::unserialize(CheckpointIn &cp) 917903Shestness@cs.utexas.edu{ 9210905Sandreas.sandberg@arm.com pit.unserialize("pit", cp); 937903Shestness@cs.utexas.edu} 947903Shestness@cs.utexas.edu 9510642Scdirik@micron.comvoid 9610642Scdirik@micron.comX86ISA::I8254::startup() 9710642Scdirik@micron.com{ 9810642Scdirik@micron.com pit.startup(); 9910642Scdirik@micron.com} 10010642Scdirik@micron.com 1015636Sgblack@eecs.umich.eduX86ISA::I8254 * 1025636Sgblack@eecs.umich.eduI8254Params::create() 1035636Sgblack@eecs.umich.edu{ 1045636Sgblack@eecs.umich.edu return new X86ISA::I8254(this); 1055636Sgblack@eecs.umich.edu} 106