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 <deque>
  37 #include <string>
  38 #include <vector>
  39 #include <bitset>
  40
  41 #include "base/trace.hh"
  42 #include "dev/pciconfigall.hh"
  43 #include "dev/pcidev.hh"
  44 #include "dev/pcireg.h"
  45 #include "dev/platform.hh"
  46 #include "mem/packet.hh"
  47 #include "sim/builder.hh"
  48 #include "sim/system.hh"
  49
  50 using namespace std;
  51
  52 PciConfigAll::PciConfigAll(Params *p)
  53     : BasicPioDevice(p)
  54 {
  55     pioSize = 0xffffff;
  56
  57     // Set backpointer for pci config. Really the config stuff should be able to
  58     // automagically do this
  59     p->platform->pciconfig = this;
  60
  61     // Make all the pointers to devices null
  62     for(int x=0; x < MAX_PCI_DEV; x++)
  63         for(int y=0; y < MAX_PCI_FUNC; y++)
  64             devices[x][y] = NULL;
  65 }
  66
  67 // If two interrupts share the same line largely bad things will happen.
  68 // Since we don't track how many times an interrupt was set and correspondingly
  69 // cleared two devices on the same interrupt line and assert and deassert each
  70 // others interrupt "line". Interrupts will not work correctly.
  71 void
  72 PciConfigAll::startup()
  73 {
  74     bitset<256> intLines;
  75     PciDev *tempDev;
  76     uint8_t intline;
  77
  78     for (int x = 0; x < MAX_PCI_DEV; x++) {
  79         for (int y = 0; y < MAX_PCI_FUNC; y++) {
  80            if (devices[x][y] != NULL) {
  81                tempDev = devices[x][y];
  82                intline = tempDev->interruptLine();
  83                if (intLines.test(intline))
  84                    warn("Interrupt line %#X is used multiple times"
  85                         "(You probably want to fix this).\n", (uint32_t)intline);
  86                else
  87                    intLines.set(intline);
  88            } // devices != NULL
  89         } // PCI_FUNC
  90     } // PCI_DEV
  91
  92 }
  93
  94 Tick
  95 PciConfigAll::read(Packet *pkt)
  96 {
  97     assert(pkt->result == Packet::Unknown);
  98     assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
  99
 100     Addr daddr = pkt->getAddr() - pioAddr;
 101     int device = (daddr >> 11) & 0x1F;
 102     int func = (daddr >> 8) & 0x7;
 103     int reg = daddr & 0xFF;
 104
 105     pkt->allocate();
 106
 107     DPRINTF(PciConfigAll, "read  va=%#x da=%#x size=%d\n", pkt->getAddr(), daddr,
 108             pkt->getSize());
 109
 110     switch (pkt->getSize()) {
 111       case sizeof(uint32_t):
 112          if (devices[device][func] == NULL)
 113              pkt->set<uint32_t>(0xFFFFFFFF);
 114          else
 115              devices[device][func]->readConfig(reg, pkt->getPtr<uint32_t>());
 116          break;
 117       case sizeof(uint16_t):
 118          if (devices[device][func] == NULL)
 119              pkt->set<uint16_t>(0xFFFF);
 120          else
 121              devices[device][func]->readConfig(reg, pkt->getPtr<uint16_t>());
 122          break;
 123       case sizeof(uint8_t):
 124          if (devices[device][func] == NULL)
 125              pkt->set<uint8_t>(0xFF);
 126          else
 127              devices[device][func]->readConfig(reg, pkt->getPtr<uint8_t>());
 128          break;
 129       default:
 130         panic("invalid access size(?) for PCI configspace!\n");
 131     }
 132     pkt->result = Packet::Success;
 133     return pioDelay;
 134 }
 135
 136 Tick
 137 PciConfigAll::write(Packet *pkt)
 138 {
 139     assert(pkt->result == Packet::Unknown);
 140     assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
 141     assert(pkt->getSize() == sizeof(uint8_t) || pkt->getSize() == sizeof(uint16_t) ||
 142             pkt->getSize() == sizeof(uint32_t));
 143     Addr daddr = pkt->getAddr() - pioAddr;
 144
 145     int device = (daddr >> 11) & 0x1F;
 146     int func = (daddr >> 8) & 0x7;
 147     int reg = daddr & 0xFF;
 148
 149     if (devices[device][func] == NULL)
 150         panic("Attempting to write to config space on non-existant device\n");
 151
 152     DPRINTF(PciConfigAll, "write - va=%#x size=%d data=%#x\n",
 153             pkt->getAddr(), pkt->getSize(), pkt->get<uint32_t>());
 154
 155     switch (pkt->getSize()) {
 156       case sizeof(uint8_t):
 157         devices[device][func]->writeConfig(reg, pkt->get<uint8_t>());
 158         break;
 159       case sizeof(uint16_t):
 160         devices[device][func]->writeConfig(reg, pkt->get<uint16_t>());
 161         break;
 162       case sizeof(uint32_t):
 163         devices[device][func]->writeConfig(reg, pkt->get<uint32_t>());
 164         break;
 165       default:
 166         panic("invalid pci config write size\n");
 167     }
 168     pkt->result = Packet::Success;
 169     return pioDelay;
 170 }
 171
 172 void
 173 PciConfigAll::serialize(std::ostream &os)
 174 {
 175     /*
 176      * There is no state associated with this object that requires
 177      * serialization.  The only real state are the device pointers
 178      * which are all setup by the constructor of the PciDev class
 179      */
 180 }
 181
 182 void
 183 PciConfigAll::unserialize(Checkpoint *cp, const std::string &section)
 184 {
 185     /*
 186      * There is no state associated with this object that requires
 187      * serialization.  The only real state are the device pointers
 188      * which are all setup by the constructor of the PciDev class
 189      */
 190 }
 191
 192 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 193
 194 BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
 195
 196     Param<Addr> pio_addr;
 197     Param<Tick> pio_latency;
 198     SimObjectParam<Platform *> platform;
 199     SimObjectParam<System *> system;
 200
 201 END_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
 202
 203 BEGIN_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 204
 205     INIT_PARAM(pio_addr, "Device Address"),
 206     INIT_PARAM(pio_latency, "Programmed IO latency"),
 207     INIT_PARAM(platform, "platform"),
 208     INIT_PARAM(system, "system object")
 209
 210 END_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
 211
 212 CREATE_SIM_OBJECT(PciConfigAll)
 213 {
 214     BasicPioDevice::Params *p = new BasicPioDevice::Params;
 215     p->pio_addr = pio_addr;
 216     p->pio_delay = pio_latency;
 217     p->platform = platform;
 218     p->system = system;
 219     return new PciConfigAll(p);
 220 }
 221
 222 REGISTER_SIM_OBJECT("PciConfigAll", PciConfigAll)
 223
 224 #endif // DOXYGEN_SHOULD_SKIP_THIS