src/dev/isa_fake.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  */
  30
  31 /** @file
  32  * Isa Fake Device implementation
  33  */
  34
  35 #include "base/trace.hh"
  36 #include "dev/isa_fake.hh"
  37 #include "mem/packet.hh"
  38 #include "mem/packet_access.hh"
  39 #include "sim/system.hh"
  40
  41 using namespace std;
  42
  43 IsaFake::IsaFake(Params *p)
  44     : BasicPioDevice(p)
  45 {
  46     if (!p->ret_bad_addr)
  47         pioSize = p->pio_size;
  48
  49     retData8 = p->ret_data8;
  50     retData16 = p->ret_data16;
  51     retData32 = p->ret_data32;
  52     retData64 = p->ret_data64;
  53 }
  54
  55 Tick
  56 IsaFake::read(PacketPtr pkt)
  57 {
  58
  59     if (params()->warn_access != "")
  60         warn("Device %s accessed by read to address %#x size=%d\n",
  61                 name(), pkt->getAddr(), pkt->getSize());
  62     if (params()->ret_bad_addr) {
  63         DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n",
  64                 pkt->getAddr(), pkt->getSize());
  65         pkt->setBadAddress();
  66     } else {
  67         assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
  68         DPRINTF(Tsunami, "read  va=%#x size=%d\n",
  69                 pkt->getAddr(), pkt->getSize());
  70         switch (pkt->getSize()) {
  71           case sizeof(uint64_t):
  72              pkt->set(retData64);
  73              break;
  74           case sizeof(uint32_t):
  75              pkt->set(retData32);
  76              break;
  77           case sizeof(uint16_t):
  78              pkt->set(retData16);
  79              break;
  80           case sizeof(uint8_t):
  81              pkt->set(retData8);
  82              break;
  83           default:
  84             panic("invalid access size!\n");
  85         }
  86         pkt->makeAtomicResponse();
  87     }
  88     return pioDelay;
  89 }
  90
  91 Tick
  92 IsaFake::write(PacketPtr pkt)
  93 {
  94     if (params()->warn_access != "") {
  95         uint64_t data;
  96         switch (pkt->getSize()) {
  97           case sizeof(uint64_t):
  98             data = pkt->get<uint64_t>();
  99             break;
 100           case sizeof(uint32_t):
 101             data = pkt->get<uint32_t>();
 102             break;
 103           case sizeof(uint16_t):
 104             data = pkt->get<uint16_t>();
 105             break;
 106           case sizeof(uint8_t):
 107             data = pkt->get<uint8_t>();
 108             break;
 109           default:
 110             panic("invalid access size!\n");
 111         }
 112         warn("Device %s accessed by write to address %#x size=%d data=%#x\n",
 113                 name(), pkt->getAddr(), pkt->getSize(), data);
 114     }
 115     if (params()->ret_bad_addr) {
 116         DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n",
 117                 pkt->getAddr(), pkt->getSize());
 118         pkt->setBadAddress();
 119     } else {
 120         DPRINTF(Tsunami, "write - va=%#x size=%d \n",
 121                 pkt->getAddr(), pkt->getSize());
 122
 123         if (params()->update_data) {
 124             switch (pkt->getSize()) {
 125               case sizeof(uint64_t):
 126                 retData64 = pkt->get<uint64_t>();
 127                 break;
 128               case sizeof(uint32_t):
 129                 retData32 = pkt->get<uint32_t>();
 130                 break;
 131               case sizeof(uint16_t):
 132                 retData16 = pkt->get<uint16_t>();
 133                 break;
 134               case sizeof(uint8_t):
 135                 retData8 = pkt->get<uint8_t>();
 136                 break;
 137               default:
 138                 panic("invalid access size!\n");
 139             }
 140         }
 141         pkt->makeAtomicResponse();
 142     }
 143     return pioDelay;
 144 }
 145
 146 IsaFake *
 147 IsaFakeParams::create()
 148 {
 149     return new IsaFake(this);
 150 }