i8254.hh revision 5827
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#ifndef __DEV_X86_I8254_HH__ 32#define __DEV_X86_I8254_HH__ 33 34#include "dev/intel_8254_timer.hh" 35#include "dev/io_device.hh" 36#include "params/I8254.hh" 37 38namespace X86ISA 39{ 40 41class IntSourcePin; 42 43class I8254 : public BasicPioDevice 44{ 45 protected: 46 Tick latency; 47 class X86Intel8254Timer : public Intel8254Timer 48 { 49 protected: 50 I8254 * parent; 51 52 void 53 counterInterrupt(unsigned int num) 54 { 55 parent->counterInterrupt(num); 56 } 57 58 public: 59 X86Intel8254Timer(const std::string &name, I8254 * _parent) : 60 Intel8254Timer(_parent, name), parent(_parent) 61 {} 62 }; 63 64 65 X86Intel8254Timer pit; 66 67 IntSourcePin *intPin; 68 69 void counterInterrupt(unsigned int num); 70 71 public: 72 typedef I8254Params Params; 73 74 const Params * 75 params() const 76 { 77 return dynamic_cast<const Params *>(_params); 78 } 79 80 I8254(Params *p) : BasicPioDevice(p), latency(p->pio_latency), 81 pit(p->name, this), intPin(p->int_pin) 82 { 83 pioSize = 4; 84 } 85 Tick read(PacketPtr pkt); 86 87 Tick write(PacketPtr pkt); 88 89 bool 90 outputHigh(unsigned int num) 91 { 92 return pit.outputHigh(num); 93 } 94 95 uint8_t 96 readCounter(unsigned int num) 97 { 98 return pit.readCounter(num); 99 } 100 101 void 102 writeCounter(unsigned int num, const uint8_t data) 103 { 104 pit.writeCounter(num, data); 105 } 106 107 void 108 writeControl(uint8_t val) 109 { 110 pit.writeControl(val); 111 } 112}; 113 114}; // namespace X86ISA 115 116#endif //__DEV_X86_SOUTH_BRIDGE_I8254_HH__ 117