src/dev/mips/malta_io.cc

   1 /*
   2  * Copyright (c) 2004-2005 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: Ali Saidi
  29  *          Andrew Schultz
  30  *          Miguel Serrano
  31  */
  32
  33 /** @file
  34  * Malta I/O including PIC, PIT, RTC, DMA
  35  */
  36
  37 #include "dev/mips/malta_io.hh"
  38
  39 #include <sys/time.h>
  40
  41 #include <deque>
  42 #include <string>
  43 #include <vector>
  44
  45 #include "base/time.hh"
  46 #include "base/trace.hh"
  47 #include "config/the_isa.hh"
  48 #include "debug/Malta.hh"
  49 #include "dev/mips/malta.hh"
  50 #include "dev/mips/malta_cchip.hh"
  51 #include "dev/mips/maltareg.h"
  52 #include "dev/rtcreg.h"
  53 #include "mem/packet.hh"
  54 #include "mem/packet_access.hh"
  55 #include "mem/port.hh"
  56 #include "params/MaltaIO.hh"
  57 #include "sim/system.hh"
  58
  59 using namespace std;
  60 using namespace TheISA;
  61
  62 MaltaIO::RTC::RTC(const string &name, const MaltaIOParams *p)
  63     : MC146818(p->malta, name, p->time, p->year_is_bcd, p->frequency),
  64       malta(p->malta)
  65 {
  66 }
  67
  68 MaltaIO::MaltaIO(const Params *p)
  69     : BasicPioDevice(p, 0x100), malta(p->malta),
  70       pitimer(this, p->name + "pitimer"), rtc(p->name + ".rtc", p)
  71 {
  72     // set the back pointer from malta to myself
  73     malta->io = this;
  74
  75     timerData = 0;
  76     picr = 0;
  77     picInterrupting = false;
  78 }
  79
  80 Tick
  81 MaltaIO::frequency() const
  82 {
  83     return SimClock::Frequency / params()->frequency;
  84 }
  85
  86 Tick
  87 MaltaIO::read(PacketPtr pkt)
  88 {
  89     panic("MaltaIO::read(...) not implemented inside malta_io.cc");
  90     return pioDelay;
  91 }
  92
  93 Tick
  94 MaltaIO::write(PacketPtr pkt)
  95 {
  96     panic("MaltaIO::write(...) not implemented inside malta_io.cc");
  97     return pioDelay;
  98 }
  99
 100 void
 101 MaltaIO::postIntr(uint8_t interrupt)
 102 {
 103     malta->cchip->postIntr(interrupt);
 104     DPRINTF(Malta, "posting pic interrupt to cchip\n");
 105 }
 106
 107 void
 108 MaltaIO::clearIntr(uint8_t interrupt)
 109 {
 110     malta->cchip->clearIntr(interrupt);
 111     DPRINTF(Malta, "clear pic interrupt to cchip\n");
 112 }
 113
 114 void
 115 MaltaIO::serialize(CheckpointOut &cp) const
 116 {
 117     SERIALIZE_SCALAR(timerData);
 118     SERIALIZE_SCALAR(mask1);
 119     SERIALIZE_SCALAR(mask2);
 120     SERIALIZE_SCALAR(mode1);
 121     SERIALIZE_SCALAR(mode2);
 122     SERIALIZE_SCALAR(picr);
 123     SERIALIZE_SCALAR(picInterrupting);
 124
 125     // Serialize the timers
 126     pitimer.serialize("pitimer", cp);
 127     rtc.serialize("rtc", cp);
 128 }
 129
 130 void
 131 MaltaIO::unserialize(CheckpointIn &cp)
 132 {
 133     UNSERIALIZE_SCALAR(timerData);
 134     UNSERIALIZE_SCALAR(mask1);
 135     UNSERIALIZE_SCALAR(mask2);
 136     UNSERIALIZE_SCALAR(mode1);
 137     UNSERIALIZE_SCALAR(mode2);
 138     UNSERIALIZE_SCALAR(picr);
 139     UNSERIALIZE_SCALAR(picInterrupting);
 140
 141     // Unserialize the timers
 142     pitimer.unserialize("pitimer", cp);
 143     rtc.unserialize("rtc", cp);
 144 }
 145
 146 void
 147 MaltaIO::startup()
 148 {
 149     rtc.startup();
 150     pitimer.startup();
 151 }
 152
 153 MaltaIO *
 154 MaltaIOParams::create()
 155 {
 156     return new MaltaIO(this);
 157 }