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Diffstat (limited to 'src/dev/pciconfigall.hh')
| -rw-r--r-- | src/dev/pciconfigall.hh | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/dev/pciconfigall.hh b/src/dev/pciconfigall.hh new file mode 100644 index 000000000..df4eae448 --- /dev/null +++ b/src/dev/pciconfigall.hh @@ -0,0 +1,128 @@ +/* + * 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 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 BasicPioDevice +{ + private: + /** + * 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 p parameters structure + */ + PciConfigAll(Params *p); + + /** + * 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 pkt Contains the address of the field to read. + * @return Amount of time to do the read + */ + virtual Tick read(Packet *pkt); + + /** + * 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 Tick write(Packet *pkt); + + /** + * 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); +}; + +#endif // __PCICONFIGALL_HH__ |