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/*
* Copyright (c) 2004 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 Config space implementation.
*/
#ifndef __PCICONFIGALL_HH__
#define __PCICONFIGALL_HH__
#include "dev/pcireg.h"
#include "base/range.hh"
#include "dev/io_device.hh"
static const uint32_t MAX_PCI_DEV = 32;
static const uint32_t MAX_PCI_FUNC = 8;
class PciDev;
/**
* PCI Config Space
* All of PCI config space needs to return -1 on Tsunami, except
* the devices that exist. This device maps the entire bus config
* space and passes the requests on to TsunamiPCIDev devices as
* appropriate.
*/
class PciConfigAll : public PioDevice
{
private:
Addr addr;
static const Addr size = 0xffffff;
/**
* Pointers to all the devices that are registered with this
* particular config space.
*/
PciDev* devices[MAX_PCI_DEV][MAX_PCI_FUNC];
public:
/**
* Constructor for PCIConfigAll
* @param name name of the object
* @param a base address of the write
* @param mmu the memory controller
* @param hier object to store parameters universal the device hierarchy
* @param bus The bus that this device is attached to
*/
PciConfigAll(const std::string &name, Addr a, MemoryController *mmu,
HierParams *hier, Bus *bus, Tick pio_latency);
/**
* Check if a device exists.
* @param pcidev PCI device to check
* @param pcifunc PCI function to check
* @return true if device exists, false otherwise
*/
bool deviceExists(uint32_t pcidev, uint32_t pcifunc)
{ return devices[pcidev][pcifunc] != NULL ? true : false; }
/**
* Registers a device with the config space object.
* @param pcidev PCI device to register
* @param pcifunc PCI function to register
* @param device device to register
*/
void registerDevice(uint8_t pcidev, uint8_t pcifunc, PciDev *device)
{ devices[pcidev][pcifunc] = device; }
/**
* Read something in PCI config space. If the device does not exist
* -1 is returned, if the device does exist its PciDev::ReadConfig (or the
* virtual function that overrides) it is called.
* @param req Contains the address of the field to read.
* @param data Return the field read.
* @return The fault condition of the access.
*/
virtual Fault read(MemReqPtr &req, uint8_t *data);
/**
* Write to PCI config spcae. If the device does not exit the simulator
* panics. If it does it is passed on the PciDev::WriteConfig (or the virtual
* function that overrides it).
* @param req Contains the address to write to.
* @param data The data to write.
* @return The fault condition of the access.
*/
virtual Fault write(MemReqPtr &req, const uint8_t *data);
/**
* Start up function to check if more than one person is using an interrupt line
* and print a warning if such a case exists
*/
virtual void startup();
/**
* Serialize this object to the given output stream.
* @param os The stream to serialize to.
*/
virtual void serialize(std::ostream &os);
/**
* Reconstruct the state of this object from a checkpoint.
* @param cp The checkpoint use.
* @param section The section name of this object
*/
virtual void unserialize(Checkpoint *cp, const std::string §ion);
/**
* Return how long this access will take.
* @param req the memory request to calcuate
* @return Tick when the request is done
*/
Tick cacheAccess(MemReqPtr &req);
};
#endif // __PCICONFIGALL_HH__
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