i8237.cc revision 10905
1/* 2 * Copyright (c) 2008 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 */ 30 31#include "dev/x86/i8237.hh" 32#include "mem/packet.hh" 33#include "mem/packet_access.hh" 34 35Tick 36X86ISA::I8237::read(PacketPtr pkt) 37{ 38 assert(pkt->getSize() == 1); 39 Addr offset = pkt->getAddr() - pioAddr; 40 switch (offset) { 41 case 0x0: 42 panic("Read from i8237 channel 0 current address unimplemented.\n"); 43 case 0x1: 44 panic("Read from i8237 channel 0 remaining " 45 "word count unimplemented.\n"); 46 case 0x2: 47 panic("Read from i8237 channel 1 current address unimplemented.\n"); 48 case 0x3: 49 panic("Read from i8237 channel 1 remaining " 50 "word count unimplemented.\n"); 51 case 0x4: 52 panic("Read from i8237 channel 2 current address unimplemented.\n"); 53 case 0x5: 54 panic("Read from i8237 channel 2 remaining " 55 "word count unimplemented.\n"); 56 case 0x6: 57 panic("Read from i8237 channel 3 current address unimplemented.\n"); 58 case 0x7: 59 panic("Read from i8237 channel 3 remaining " 60 "word count unimplemented.\n"); 61 case 0x8: 62 panic("Read from i8237 status register unimplemented.\n"); 63 default: 64 panic("Read from undefined i8237 register %d.\n", offset); 65 } 66 pkt->makeAtomicResponse(); 67 return latency; 68} 69 70Tick 71X86ISA::I8237::write(PacketPtr pkt) 72{ 73 assert(pkt->getSize() == 1); 74 Addr offset = pkt->getAddr() - pioAddr; 75 switch (offset) { 76 case 0x0: 77 panic("Write to i8237 channel 0 starting address unimplemented.\n"); 78 case 0x1: 79 panic("Write to i8237 channel 0 starting " 80 "word count unimplemented.\n"); 81 case 0x2: 82 panic("Write to i8237 channel 1 starting address unimplemented.\n"); 83 case 0x3: 84 panic("Write to i8237 channel 1 starting " 85 "word count unimplemented.\n"); 86 case 0x4: 87 panic("Write to i8237 channel 2 starting address unimplemented.\n"); 88 case 0x5: 89 panic("Write to i8237 channel 2 starting " 90 "word count unimplemented.\n"); 91 case 0x6: 92 panic("Write to i8237 channel 3 starting address unimplemented.\n"); 93 case 0x7: 94 panic("Write to i8237 channel 3 starting " 95 "word count unimplemented.\n"); 96 case 0x8: 97 panic("Write to i8237 command register unimplemented.\n"); 98 case 0x9: 99 panic("Write to i8237 request register unimplemented.\n"); 100 case 0xa: 101 { 102 uint8_t command = pkt->get<uint8_t>(); 103 uint8_t select = bits(command, 1, 0); 104 uint8_t bitVal = bits(command, 2); 105 if (!bitVal) 106 panic("Turning on i8237 channels unimplemented.\n"); 107 replaceBits(maskReg, select, bitVal); 108 } 109 break; 110 case 0xb: 111 panic("Write to i8237 mode register unimplemented.\n"); 112 case 0xc: 113 panic("Write to i8237 clear LSB/MSB flip-flop " 114 "register unimplemented.\n"); 115 case 0xd: 116 panic("Write to i8237 master clear/reset register unimplemented.\n"); 117 case 0xe: 118 panic("Write to i8237 clear mask register unimplemented.\n"); 119 case 0xf: 120 panic("Write to i8237 write all mask register bits unimplemented.\n"); 121 default: 122 panic("Write to undefined i8237 register.\n"); 123 } 124 pkt->makeAtomicResponse(); 125 return latency; 126} 127 128void 129X86ISA::I8237::serialize(CheckpointOut &cp) const 130{ 131 SERIALIZE_SCALAR(maskReg); 132} 133 134void 135X86ISA::I8237::unserialize(CheckpointIn &cp) 136{ 137 UNSERIALIZE_SCALAR(maskReg); 138} 139 140X86ISA::I8237 * 141I8237Params::create() 142{ 143 return new X86ISA::I8237(this); 144} 145