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
  29 /* @file
  30  * PCI Configspace implementation
  31  */
  32
  33 #include <deque>
  34 #include <string>
  35 #include <vector>
  36 #include <bitset>
  37
  38 #include "base/trace.hh"
  39 #include "dev/pciconfigall.hh"
  40 #include "dev/pcidev.hh"
  41 #include "dev/pcireg.h"
  42 #include "dev/platform.hh"
  43 #include "mem/packet.hh"
  44 #include "sim/builder.hh"
  45 #include "sim/system.hh"
  46
  47 using namespace std;
  48
  49 PciConfigAll::PciConfigAll(Params *p)
  50     : BasicPioDevice(p)
  51 {
  52     pioSize = 0xffffff;
  53
  54     // Set backpointer for pci config. Really the config stuff should be able to
  55     // automagically do this
  56     p->platform->pciconfig = this;
  57
  58     // Make all the pointers to devices null
  59     for(int x=0; x < MAX_PCI_DEV; x++)
  60         for(int y=0; y < MAX_PCI_FUNC; y++)
  61             devices[x][y] = NULL;
  62 }
  63
  64 // If two interrupts share the same line largely bad things will happen.
  65 // Since we don't track how many times an interrupt was set and correspondingly
  66 // cleared two devices on the same interrupt line and assert and deassert each
  67 // others interrupt "line". Interrupts will not work correctly.
  68 void
  69 PciConfigAll::startup()
  70 {
  71     bitset<256> intLines;
  72     PciDev *tempDev;
  73     uint8_t intline;
  74
  75     for (int x = 0; x < MAX_PCI_DEV; x++) {
  76         for (int y = 0; y < MAX_PCI_FUNC; y++) {
  77            if (devices[x][y] != NULL) {
  78                tempDev = devices[x][y];
  79                intline = tempDev->interruptLine();
  80                if (intLines.test(intline))
  81                    warn("Interrupt line %#X is used multiple times"
  82                         "(You probably want to fix this).\n", (uint32_t)intline);
  83                else
  84                    intLines.set(intline);
  85            } // devices != NULL
  86         } // PCI_FUNC
  87     } // PCI_DEV
  88
  89 }
  90
  91 Tick
  92 PciConfigAll::read(Packet *pkt)
  93 {
  94     assert(pkt->result == Packet::Unknown);
  95     assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
  96
  97     Addr daddr = pkt->getAddr() - pioAddr;
  98     int device = (daddr >> 11) & 0x1F;
  99     int func = (daddr >> 8) & 0x7;
 100     int reg = daddr & 0xFF;
 101
 102     pkt->allocate();
 103
 104     DPRINTF(PciConfigAll, "read  va=%#x da=%#x size=%d\n", pkt->getAddr(), daddr,
 105             pkt->getSize());
 106
 107     switch (pkt->getSize()) {
 108       case sizeof(uint32_t):
 109          if (devices[device][func] == NULL)
 110              pkt->set<uint32_t>(0xFFFFFFFF);
 111          else
 112              devices[device][func]->readConfig(reg, pkt->getPtr<uint32_t>());
 113          break;
 114       case sizeof(uint16_t):
 115          if (devices[device][func] == NULL)
 116              pkt->set<uint16_t>(0xFFFF);
 117          else
 118              devices[device][func]->readConfig(reg, pkt->getPtr<uint16_t>());
 119          break;
 120       case sizeof(uint8_t):
 121          if (devices[device][func] == NULL)
 122              pkt->set<uint8_t>(0xFF);
 123          else
 124              devices[device][func]->readConfig(reg, pkt->getPtr<uint8_t>());
 125          break;
 126       default:
 127         panic("invalid access size(?) for PCI configspace!\n");
 128     }
 129     pkt->result = Packet::Success;
 130     return pioDelay;
 131 }
 132
 133 Tick
 134 PciConfigAll::write(Packet *pkt)
 135 {
 136     assert(pkt->result == Packet::Unknown);
 137     assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
 138     assert(pkt->getSize() == sizeof(uint8_t) || pkt->getSize() == sizeof(uint16_t) ||
 139             pkt->getSize() == sizeof(uint32_t));
 140     Addr daddr = pkt->getAddr() - pioAddr;
 141
 142     int device = (daddr >> 11) & 0x1F;
 143     int func = (daddr >> 8) & 0x7;
 144     int reg = daddr & 0xFF;
 145
 146     if (devices[device][func] == NULL)
 147         panic("Attempting to write to config space on non-existant device\n");
 148
 149     DPRINTF(PciConfigAll, "write - va=%#x size=%d data=%#x\n",
 150             pkt->getAddr(), pkt->getSize(), pkt->get<uint32_t>());
 151
 152     switch (pkt->getSize()) {
 153       case sizeof(uint8_t):
 154         devices[device][func]->writeConfig(reg, pkt->get<uint8_t>());
 155         break;
 156       case sizeof(uint16_t):
 157         devices[device][func]->writeConfig(reg, pkt->get<uint16_t>());
 158         break;
 159       case sizeof(uint32_t):
 160         devices[device][func]->writeConfig(reg, pkt->get<uint32_t>());
 161         break;
 162       default:
 163         panic("invalid pci config write size\n");
 164     }
 165     pkt->result = Packet::Success;
 166     return pioDelay;
 167 }
 168
 169 void
 170 PciConfigAll::serialize(std::ostream &os)
 171 {
 172     /*
 173      * There is no state associated with this object that requires
 174      * serialization.  The only real state are the device pointers
 175      * which are all setup by the constructor of the PciDev class
 176      */
 177 }
 178
 179 void
 180 PciConfigAll::unserialize(Checkpoint *cp, const std::string &section)
 181 {
 182     /*
 183      * There is no state associated with this object that requires
 184      * serialization.  The only real state are the device pointers
 185      * which are all setup by the constructor of the PciDev class
 186      */
 187 }
 188
 189 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 190
 191 BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
 192
 193     Param<Addr> pio_addr;
 194     Param<Tick> pio_latency;
 195     SimObjectParam<Platform *> platform;
 196     SimObjectParam<System *> system;
 197
 198 END_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
 199
 200 BEGIN_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 201
 202     INIT_PARAM(pio_addr, "Device Address"),
 203     INIT_PARAM(pio_latency, "Programmed IO latency"),
 204     INIT_PARAM(platform, "platform"),
 205     INIT_PARAM(system, "system object")
 206
 207 END_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 208
 209 CREATE_SIM_OBJECT(PciConfigAll)
 210 {
 211     BasicPioDevice::Params *p = new BasicPioDevice::Params;
 212     p->pio_addr = pio_addr;
 213     p->pio_delay = pio_latency;
 214     p->platform = platform;
 215     p->system = system;
 216     return new PciConfigAll(p);
 217 }
 218
 219 REGISTER_SIM_OBJECT("PciConfigAll", PciConfigAll)
 220
 221 #endif // DOXYGEN_SHOULD_SKIP_THIS