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