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/*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* @file
* PCI Configspace implementation
*/
#include <deque>
#include <string>
#include <vector>
#include <bitset>
#include "base/trace.hh"
#include "dev/pciconfigall.hh"
#include "dev/pcidev.hh"
#include "dev/pcireg.h"
#include "dev/platform.hh"
#include "mem/packet.hh"
#include "sim/builder.hh"
#include "sim/system.hh"
using namespace std;
PciConfigAll::PciConfigAll(Params *p)
: BasicPioDevice(p)
{
pioSize = 0xffffff;
// Set backpointer for pci config. Really the config stuff should be able to
// automagically do this
p->platform->pciconfig = this;
// Make all the pointers to devices null
for(int x=0; x < MAX_PCI_DEV; x++)
for(int y=0; y < MAX_PCI_FUNC; y++)
devices[x][y] = NULL;
}
// If two interrupts share the same line largely bad things will happen.
// Since we don't track how many times an interrupt was set and correspondingly
// cleared two devices on the same interrupt line and assert and deassert each
// others interrupt "line". Interrupts will not work correctly.
void
PciConfigAll::startup()
{
bitset<256> intLines;
PciDev *tempDev;
uint8_t intline;
for (int x = 0; x < MAX_PCI_DEV; x++) {
for (int y = 0; y < MAX_PCI_FUNC; y++) {
if (devices[x][y] != NULL) {
tempDev = devices[x][y];
intline = tempDev->interruptLine();
if (intLines.test(intline))
warn("Interrupt line %#X is used multiple times"
"(You probably want to fix this).\n", (uint32_t)intline);
else
intLines.set(intline);
} // devices != NULL
} // PCI_FUNC
} // PCI_DEV
}
Tick
PciConfigAll::read(Packet *pkt)
{
assert(pkt->result == Unknown);
assert(pkt->addr >= pioAddr && pkt->addr < pioAddr + pioSize);
Addr daddr = pkt->addr - pioAddr;
int device = (daddr >> 11) & 0x1F;
int func = (daddr >> 8) & 0x7;
int reg = daddr & 0xFF;
pkt->time += pioDelay;
pkt->allocate();
DPRINTF(PciConfigAll, "read va=%#x da=%#x size=%d\n", pkt->addr, daddr,
pkt->size);
switch (pkt->size) {
case sizeof(uint32_t):
if (devices[device][func] == NULL)
pkt->set<uint32_t>(0xFFFFFFFF);
else
devices[device][func]->readConfig(reg, pkt->getPtr<uint32_t>());
break;
case sizeof(uint16_t):
if (devices[device][func] == NULL)
pkt->set<uint16_t>(0xFFFF);
else
devices[device][func]->readConfig(reg, pkt->getPtr<uint16_t>());
break;
case sizeof(uint8_t):
if (devices[device][func] == NULL)
pkt->set<uint8_t>(0xFF);
else
devices[device][func]->readConfig(reg, pkt->getPtr<uint8_t>());
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
pkt->result = Success;
return pioDelay;
}
Tick
PciConfigAll::write(Packet *pkt)
{
pkt->time += pioDelay;
assert(pkt->result == Unknown);
assert(pkt->addr >= pioAddr && pkt->addr < pioAddr + pioSize);
assert(pkt->size == sizeof(uint8_t) || pkt->size == sizeof(uint16_t) ||
pkt->size == sizeof(uint32_t));
Addr daddr = pkt->addr - pioAddr;
int device = (daddr >> 11) & 0x1F;
int func = (daddr >> 8) & 0x7;
int reg = daddr & 0xFF;
if (devices[device][func] == NULL)
panic("Attempting to write to config space on non-existant device\n");
DPRINTF(PciConfigAll, "write - va=%#x size=%d data=%#x\n",
pkt->addr, pkt->size, pkt->get<uint32_t>());
switch (pkt->size) {
case sizeof(uint8_t):
devices[device][func]->writeConfig(reg, pkt->get<uint8_t>());
break;
case sizeof(uint16_t):
devices[device][func]->writeConfig(reg, pkt->get<uint16_t>());
break;
case sizeof(uint32_t):
devices[device][func]->writeConfig(reg, pkt->get<uint32_t>());
break;
default:
panic("invalid pci config write size\n");
}
pkt->result = Success;
return pioDelay;
}
void
PciConfigAll::serialize(std::ostream &os)
{
/*
* There is no state associated with this object that requires
* serialization. The only real state are the device pointers
* which are all setup by the constructor of the PciDev class
*/
}
void
PciConfigAll::unserialize(Checkpoint *cp, const std::string §ion)
{
/*
* There is no state associated with this object that requires
* serialization. The only real state are the device pointers
* which are all setup by the constructor of the PciDev class
*/
}
#ifndef DOXYGEN_SHOULD_SKIP_THIS
BEGIN_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
Param<Addr> pio_addr;
Param<Tick> pio_latency;
SimObjectParam<Platform *> platform;
SimObjectParam<System *> system;
END_DECLARE_SIM_OBJECT_PARAMS(PciConfigAll)
BEGIN_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
INIT_PARAM(pio_addr, "Device Address"),
INIT_PARAM(pio_latency, "Programmed IO latency"),
INIT_PARAM(platform, "platform"),
INIT_PARAM(system, "system object")
END_INIT_SIM_OBJECT_PARAMS(PciConfigAll)
CREATE_SIM_OBJECT(PciConfigAll)
{
BasicPioDevice::Params *p = new BasicPioDevice::Params;
p->pio_addr = pio_addr;
p->pio_delay = pio_latency;
p->platform = platform;
p->system = system;
return new PciConfigAll(p);
}
REGISTER_SIM_OBJECT("PciConfigAll", PciConfigAll)
#endif // DOXYGEN_SHOULD_SKIP_THIS
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