src/dev/pciconfigall.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: Andrew Schultz
  29  *          Ali Saidi
  30  */
  31
  32 /* @file
  33  * PCI Configspace implementation
  34  */
  35
  36 #include "base/trace.hh"
  37 #include "debug/PciConfigAll.hh"
  38 #include "dev/pciconfigall.hh"
  39 #include "dev/pcireg.h"
  40 #include "dev/platform.hh"
  41 #include "mem/packet.hh"
  42 #include "mem/packet_access.hh"
  43 #include "params/PciConfigAll.hh"
  44 #include "sim/system.hh"
  45
  46 using namespace std;
  47
  48 PciConfigAll::PciConfigAll(const Params *p)
  49     : PioDevice(p)
  50 {
  51     pioAddr = p->platform->calcPciConfigAddr(params()->bus,0,0);
  52 }
  53
  54
  55 Tick
  56 PciConfigAll::read(PacketPtr pkt)
  57 {
  58
  59     pkt->allocate();
  60
  61     DPRINTF(PciConfigAll, "read  va=%#x size=%d\n", pkt->getAddr(),
  62             pkt->getSize());
  63
  64     switch (pkt->getSize()) {
  65       case sizeof(uint32_t):
  66          pkt->set<uint32_t>(0xFFFFFFFF);
  67          break;
  68       case sizeof(uint16_t):
  69          pkt->set<uint16_t>(0xFFFF);
  70          break;
  71       case sizeof(uint8_t):
  72          pkt->set<uint8_t>(0xFF);
  73          break;
  74       default:
  75         panic("invalid access size(?) for PCI configspace!\n");
  76     }
  77     pkt->makeAtomicResponse();
  78     return params()->pio_latency;
  79 }
  80
  81 Tick
  82 PciConfigAll::write(PacketPtr pkt)
  83 {
  84     panic("Attempting to write to config space on non-existant device\n");
  85     M5_DUMMY_RETURN
  86 }
  87
  88
  89 void
  90 PciConfigAll::addressRanges(AddrRangeList &range_list)
  91 {
  92     range_list.clear();
  93     range_list.push_back(RangeSize(pioAddr, params()->size));
  94 }
  95
  96
  97 #ifndef DOXYGEN_SHOULD_SKIP_THIS
  98
  99 PciConfigAll *
 100 PciConfigAllParams::create()
 101 {
 102     return new PciConfigAll(this);
 103 }
 104
 105 #endif // DOXYGEN_SHOULD_SKIP_THIS