i8237.cc revision 13229
15818Sgblack@eecs.umich.edu/* 25818Sgblack@eecs.umich.edu * Copyright (c) 2008 The Regents of The University of Michigan 35818Sgblack@eecs.umich.edu * All rights reserved. 45818Sgblack@eecs.umich.edu * 55818Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65818Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75818Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85818Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95818Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105818Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115818Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125818Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135818Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145818Sgblack@eecs.umich.edu * this software without specific prior written permission. 155818Sgblack@eecs.umich.edu * 165818Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175818Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185818Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195818Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205818Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215818Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225818Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235818Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245818Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255818Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265818Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275818Sgblack@eecs.umich.edu * 285818Sgblack@eecs.umich.edu * Authors: Gabe Black 295818Sgblack@eecs.umich.edu */ 305818Sgblack@eecs.umich.edu 315818Sgblack@eecs.umich.edu#include "dev/x86/i8237.hh" 3211793Sbrandon.potter@amd.com 335818Sgblack@eecs.umich.edu#include "mem/packet.hh" 345818Sgblack@eecs.umich.edu#include "mem/packet_access.hh" 355818Sgblack@eecs.umich.edu 365818Sgblack@eecs.umich.eduTick 375818Sgblack@eecs.umich.eduX86ISA::I8237::read(PacketPtr pkt) 385818Sgblack@eecs.umich.edu{ 395818Sgblack@eecs.umich.edu assert(pkt->getSize() == 1); 405818Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 415818Sgblack@eecs.umich.edu switch (offset) { 425818Sgblack@eecs.umich.edu case 0x0: 435818Sgblack@eecs.umich.edu panic("Read from i8237 channel 0 current address unimplemented.\n"); 445818Sgblack@eecs.umich.edu case 0x1: 455818Sgblack@eecs.umich.edu panic("Read from i8237 channel 0 remaining " 465818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 475818Sgblack@eecs.umich.edu case 0x2: 485818Sgblack@eecs.umich.edu panic("Read from i8237 channel 1 current address unimplemented.\n"); 495818Sgblack@eecs.umich.edu case 0x3: 505818Sgblack@eecs.umich.edu panic("Read from i8237 channel 1 remaining " 515818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 525818Sgblack@eecs.umich.edu case 0x4: 535818Sgblack@eecs.umich.edu panic("Read from i8237 channel 2 current address unimplemented.\n"); 545818Sgblack@eecs.umich.edu case 0x5: 555818Sgblack@eecs.umich.edu panic("Read from i8237 channel 2 remaining " 565818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 575818Sgblack@eecs.umich.edu case 0x6: 585818Sgblack@eecs.umich.edu panic("Read from i8237 channel 3 current address unimplemented.\n"); 595818Sgblack@eecs.umich.edu case 0x7: 605818Sgblack@eecs.umich.edu panic("Read from i8237 channel 3 remaining " 615818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 625818Sgblack@eecs.umich.edu case 0x8: 635818Sgblack@eecs.umich.edu panic("Read from i8237 status register unimplemented.\n"); 645818Sgblack@eecs.umich.edu default: 655818Sgblack@eecs.umich.edu panic("Read from undefined i8237 register %d.\n", offset); 665818Sgblack@eecs.umich.edu } 675898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 685818Sgblack@eecs.umich.edu return latency; 695818Sgblack@eecs.umich.edu} 705818Sgblack@eecs.umich.edu 715818Sgblack@eecs.umich.eduTick 725818Sgblack@eecs.umich.eduX86ISA::I8237::write(PacketPtr pkt) 735818Sgblack@eecs.umich.edu{ 745818Sgblack@eecs.umich.edu assert(pkt->getSize() == 1); 755818Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 765818Sgblack@eecs.umich.edu switch (offset) { 775818Sgblack@eecs.umich.edu case 0x0: 785818Sgblack@eecs.umich.edu panic("Write to i8237 channel 0 starting address unimplemented.\n"); 795818Sgblack@eecs.umich.edu case 0x1: 805818Sgblack@eecs.umich.edu panic("Write to i8237 channel 0 starting " 815818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 825818Sgblack@eecs.umich.edu case 0x2: 835818Sgblack@eecs.umich.edu panic("Write to i8237 channel 1 starting address unimplemented.\n"); 845818Sgblack@eecs.umich.edu case 0x3: 855818Sgblack@eecs.umich.edu panic("Write to i8237 channel 1 starting " 865818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 875818Sgblack@eecs.umich.edu case 0x4: 885818Sgblack@eecs.umich.edu panic("Write to i8237 channel 2 starting address unimplemented.\n"); 895818Sgblack@eecs.umich.edu case 0x5: 905818Sgblack@eecs.umich.edu panic("Write to i8237 channel 2 starting " 915818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 925818Sgblack@eecs.umich.edu case 0x6: 935818Sgblack@eecs.umich.edu panic("Write to i8237 channel 3 starting address unimplemented.\n"); 945818Sgblack@eecs.umich.edu case 0x7: 955818Sgblack@eecs.umich.edu panic("Write to i8237 channel 3 starting " 965818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 975818Sgblack@eecs.umich.edu case 0x8: 985818Sgblack@eecs.umich.edu panic("Write to i8237 command register unimplemented.\n"); 995818Sgblack@eecs.umich.edu case 0x9: 1005818Sgblack@eecs.umich.edu panic("Write to i8237 request register unimplemented.\n"); 1015818Sgblack@eecs.umich.edu case 0xa: 1025818Sgblack@eecs.umich.edu { 10313229Sgabeblack@google.com uint8_t command = pkt->getLE<uint8_t>(); 1045818Sgblack@eecs.umich.edu uint8_t select = bits(command, 1, 0); 1055818Sgblack@eecs.umich.edu uint8_t bitVal = bits(command, 2); 1065818Sgblack@eecs.umich.edu if (!bitVal) 1075818Sgblack@eecs.umich.edu panic("Turning on i8237 channels unimplemented.\n"); 1085818Sgblack@eecs.umich.edu replaceBits(maskReg, select, bitVal); 1095818Sgblack@eecs.umich.edu } 1105818Sgblack@eecs.umich.edu break; 1115818Sgblack@eecs.umich.edu case 0xb: 1125818Sgblack@eecs.umich.edu panic("Write to i8237 mode register unimplemented.\n"); 1135818Sgblack@eecs.umich.edu case 0xc: 1145818Sgblack@eecs.umich.edu panic("Write to i8237 clear LSB/MSB flip-flop " 1155818Sgblack@eecs.umich.edu "register unimplemented.\n"); 1165818Sgblack@eecs.umich.edu case 0xd: 1175818Sgblack@eecs.umich.edu panic("Write to i8237 master clear/reset register unimplemented.\n"); 1185818Sgblack@eecs.umich.edu case 0xe: 1195818Sgblack@eecs.umich.edu panic("Write to i8237 clear mask register unimplemented.\n"); 1205818Sgblack@eecs.umich.edu case 0xf: 1215818Sgblack@eecs.umich.edu panic("Write to i8237 write all mask register bits unimplemented.\n"); 1225818Sgblack@eecs.umich.edu default: 1237903Shestness@cs.utexas.edu panic("Write to undefined i8237 register.\n"); 1245818Sgblack@eecs.umich.edu } 1255898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 1265818Sgblack@eecs.umich.edu return latency; 1275818Sgblack@eecs.umich.edu} 1285818Sgblack@eecs.umich.edu 1297903Shestness@cs.utexas.eduvoid 13010905Sandreas.sandberg@arm.comX86ISA::I8237::serialize(CheckpointOut &cp) const 1317903Shestness@cs.utexas.edu{ 1327903Shestness@cs.utexas.edu SERIALIZE_SCALAR(maskReg); 1337903Shestness@cs.utexas.edu} 1347903Shestness@cs.utexas.edu 1357903Shestness@cs.utexas.eduvoid 13610905Sandreas.sandberg@arm.comX86ISA::I8237::unserialize(CheckpointIn &cp) 1377903Shestness@cs.utexas.edu{ 1387903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(maskReg); 1397903Shestness@cs.utexas.edu} 1407903Shestness@cs.utexas.edu 1415818Sgblack@eecs.umich.eduX86ISA::I8237 * 1425818Sgblack@eecs.umich.eduI8237Params::create() 1435818Sgblack@eecs.umich.edu{ 1445818Sgblack@eecs.umich.edu return new X86ISA::I8237(this); 1455818Sgblack@eecs.umich.edu} 146