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