i8237.cc revision 5898
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" 325818Sgblack@eecs.umich.edu#include "mem/packet.hh" 335818Sgblack@eecs.umich.edu#include "mem/packet_access.hh" 345818Sgblack@eecs.umich.edu 355818Sgblack@eecs.umich.eduTick 365818Sgblack@eecs.umich.eduX86ISA::I8237::read(PacketPtr pkt) 375818Sgblack@eecs.umich.edu{ 385818Sgblack@eecs.umich.edu assert(pkt->getSize() == 1); 395818Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 405818Sgblack@eecs.umich.edu switch (offset) { 415818Sgblack@eecs.umich.edu case 0x0: 425818Sgblack@eecs.umich.edu panic("Read from i8237 channel 0 current address unimplemented.\n"); 435818Sgblack@eecs.umich.edu case 0x1: 445818Sgblack@eecs.umich.edu panic("Read from i8237 channel 0 remaining " 455818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 465818Sgblack@eecs.umich.edu case 0x2: 475818Sgblack@eecs.umich.edu panic("Read from i8237 channel 1 current address unimplemented.\n"); 485818Sgblack@eecs.umich.edu case 0x3: 495818Sgblack@eecs.umich.edu panic("Read from i8237 channel 1 remaining " 505818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 515818Sgblack@eecs.umich.edu case 0x4: 525818Sgblack@eecs.umich.edu panic("Read from i8237 channel 2 current address unimplemented.\n"); 535818Sgblack@eecs.umich.edu case 0x5: 545818Sgblack@eecs.umich.edu panic("Read from i8237 channel 2 remaining " 555818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 565818Sgblack@eecs.umich.edu case 0x6: 575818Sgblack@eecs.umich.edu panic("Read from i8237 channel 3 current address unimplemented.\n"); 585818Sgblack@eecs.umich.edu case 0x7: 595818Sgblack@eecs.umich.edu panic("Read from i8237 channel 3 remaining " 605818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 615818Sgblack@eecs.umich.edu case 0x8: 625818Sgblack@eecs.umich.edu panic("Read from i8237 status register unimplemented.\n"); 635818Sgblack@eecs.umich.edu default: 645818Sgblack@eecs.umich.edu panic("Read from undefined i8237 register %d.\n", offset); 655818Sgblack@eecs.umich.edu } 665898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 675818Sgblack@eecs.umich.edu return latency; 685818Sgblack@eecs.umich.edu} 695818Sgblack@eecs.umich.edu 705818Sgblack@eecs.umich.eduTick 715818Sgblack@eecs.umich.eduX86ISA::I8237::write(PacketPtr pkt) 725818Sgblack@eecs.umich.edu{ 735818Sgblack@eecs.umich.edu assert(pkt->getSize() == 1); 745818Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 755818Sgblack@eecs.umich.edu switch (offset) { 765818Sgblack@eecs.umich.edu case 0x0: 775818Sgblack@eecs.umich.edu panic("Write to i8237 channel 0 starting address unimplemented.\n"); 785818Sgblack@eecs.umich.edu case 0x1: 795818Sgblack@eecs.umich.edu panic("Write to i8237 channel 0 starting " 805818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 815818Sgblack@eecs.umich.edu case 0x2: 825818Sgblack@eecs.umich.edu panic("Write to i8237 channel 1 starting address unimplemented.\n"); 835818Sgblack@eecs.umich.edu case 0x3: 845818Sgblack@eecs.umich.edu panic("Write to i8237 channel 1 starting " 855818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 865818Sgblack@eecs.umich.edu case 0x4: 875818Sgblack@eecs.umich.edu panic("Write to i8237 channel 2 starting address unimplemented.\n"); 885818Sgblack@eecs.umich.edu case 0x5: 895818Sgblack@eecs.umich.edu panic("Write to i8237 channel 2 starting " 905818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 915818Sgblack@eecs.umich.edu case 0x6: 925818Sgblack@eecs.umich.edu panic("Write to i8237 channel 3 starting address unimplemented.\n"); 935818Sgblack@eecs.umich.edu case 0x7: 945818Sgblack@eecs.umich.edu panic("Write to i8237 channel 3 starting " 955818Sgblack@eecs.umich.edu "word count unimplemented.\n"); 965818Sgblack@eecs.umich.edu case 0x8: 975818Sgblack@eecs.umich.edu panic("Write to i8237 command register unimplemented.\n"); 985818Sgblack@eecs.umich.edu case 0x9: 995818Sgblack@eecs.umich.edu panic("Write to i8237 request register unimplemented.\n"); 1005818Sgblack@eecs.umich.edu case 0xa: 1015818Sgblack@eecs.umich.edu { 1025818Sgblack@eecs.umich.edu uint8_t command = pkt->get<uint8_t>(); 1035818Sgblack@eecs.umich.edu uint8_t select = bits(command, 1, 0); 1045818Sgblack@eecs.umich.edu uint8_t bitVal = bits(command, 2); 1055818Sgblack@eecs.umich.edu if (!bitVal) 1065818Sgblack@eecs.umich.edu panic("Turning on i8237 channels unimplemented.\n"); 1075818Sgblack@eecs.umich.edu replaceBits(maskReg, select, bitVal); 1085818Sgblack@eecs.umich.edu } 1095818Sgblack@eecs.umich.edu break; 1105818Sgblack@eecs.umich.edu case 0xb: 1115818Sgblack@eecs.umich.edu panic("Write to i8237 mode register unimplemented.\n"); 1125818Sgblack@eecs.umich.edu case 0xc: 1135818Sgblack@eecs.umich.edu panic("Write to i8237 clear LSB/MSB flip-flop " 1145818Sgblack@eecs.umich.edu "register unimplemented.\n"); 1155818Sgblack@eecs.umich.edu case 0xd: 1165818Sgblack@eecs.umich.edu panic("Write to i8237 master clear/reset register unimplemented.\n"); 1175818Sgblack@eecs.umich.edu case 0xe: 1185818Sgblack@eecs.umich.edu panic("Write to i8237 clear mask register unimplemented.\n"); 1195818Sgblack@eecs.umich.edu case 0xf: 1205818Sgblack@eecs.umich.edu panic("Write to i8237 write all mask register bits unimplemented.\n"); 1215818Sgblack@eecs.umich.edu default: 1225818Sgblack@eecs.umich.edu panic("Write to undefined i8254 register.\n"); 1235818Sgblack@eecs.umich.edu } 1245898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 1255818Sgblack@eecs.umich.edu return latency; 1265818Sgblack@eecs.umich.edu} 1275818Sgblack@eecs.umich.edu 1285818Sgblack@eecs.umich.eduX86ISA::I8237 * 1295818Sgblack@eecs.umich.eduI8237Params::create() 1305818Sgblack@eecs.umich.edu{ 1315818Sgblack@eecs.umich.edu return new X86ISA::I8237(this); 1325818Sgblack@eecs.umich.edu} 133