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Diffstat (limited to 'src/dev/pcidev.hh')
| -rw-r--r-- | src/dev/pcidev.hh | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/dev/pcidev.hh b/src/dev/pcidev.hh new file mode 100644 index 000000000..fc4773908 --- /dev/null +++ b/src/dev/pcidev.hh @@ -0,0 +1,230 @@ +/* + * 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 + * Interface for devices using PCI configuration + */ + +#ifndef __DEV_PCIDEV_HH__ +#define __DEV_PCIDEV_HH__ + +#include "dev/io_device.hh" +#include "dev/pcireg.h" +#include "dev/platform.hh" + +#define BAR_IO_MASK 0x3 +#define BAR_MEM_MASK 0xF +#define BAR_IO_SPACE_BIT 0x1 +#define BAR_IO_SPACE(x) ((x) & BAR_IO_SPACE_BIT) +#define BAR_NUMBER(x) (((x) - PCI0_BASE_ADDR0) >> 0x2); + +class PciConfigAll; + + +/** + * This class encapulates the first 64 bytes of a singles PCI + * devices config space that in configured by the configuration file. + */ +class PciConfigData : public SimObject +{ + public: + /** + * Constructor to initialize the devices config space to 0. + */ + PciConfigData(const std::string &name) + : SimObject(name) + { + memset(config.data, 0, sizeof(config.data)); + memset(BARAddrs, 0, sizeof(BARAddrs)); + memset(BARSize, 0, sizeof(BARSize)); + } + + /** The first 64 bytes */ + PCIConfig config; + + /** The size of the BARs */ + uint32_t BARSize[6]; + + /** The addresses of the BARs */ + Addr BARAddrs[6]; +}; + +/** + * PCI device, base implemnation is only config space. + * Each device is connected to a PCIConfigSpace device + * which returns -1 for everything but the pcidevs that + * register with it. This object registers with the PCIConfig space + * object. + */ +class PciDev : public DmaDevice +{ + public: + struct Params : public ::PioDevice::Params + { + /** + * A pointer to the configspace all object that calls us when + * a read comes to this particular device/function. + */ + PciConfigAll *configSpace; + + /** + * A pointer to the object that contains the first 64 bytes of + * config space + */ + PciConfigData *configData; + + /** The bus number we are on */ + uint32_t busNum; + + /** The device number we have */ + uint32_t deviceNum; + + /** The function number */ + uint32_t functionNum; + + /** The latency for pio accesses. */ + Tick pio_delay; + }; + + public: + const Params *params() const { return (const Params *)_params; } + + protected: + /** The current config space. Unlike the PciConfigData this is + * updated during simulation while continues to reflect what was + * in the config file. + */ + PCIConfig config; + + /** The size of the BARs */ + uint32_t BARSize[6]; + + /** The current address mapping of the BARs */ + Addr BARAddrs[6]; + + bool + isBAR(Addr addr, int bar) const + { + assert(bar >= 0 && bar < 6); + return BARAddrs[bar] <= addr && addr < BARAddrs[bar] + BARSize[bar]; + } + + int + getBAR(Addr addr) + { + for (int i = 0; i <= 5; ++i) + if (isBAR(addr, i)) + return i; + + return -1; + } + + bool + getBAR(Addr paddr, Addr &daddr, int &bar) + { + int b = getBAR(paddr); + if (b < 0) + return false; + + daddr = paddr - BARAddrs[b]; + bar = b; + return true; + } + + protected: + Platform *plat; + PciConfigData *configData; + Tick pioDelay; + + public: + Addr pciToDma(Addr pciAddr) const + { return plat->pciToDma(pciAddr); } + + void + intrPost() + { plat->postPciInt(configData->config.interruptLine); } + + void + intrClear() + { plat->clearPciInt(configData->config.interruptLine); } + + uint8_t + interruptLine() + { return configData->config.interruptLine; } + + /** return the address ranges that this device responds to. + * @params range_list range list to populate with ranges + */ + void addressRanges(AddrRangeList &range_list); + + /** + * Constructor for PCI Dev. This function copies data from the + * config file object PCIConfigData and registers the device with + * a PciConfigAll object. + */ + PciDev(Params *params); + + /** + * Write to the PCI config space data that is stored locally. This may be + * overridden by the device but at some point it will eventually call this + * for normal operations that it does not need to override. + * @param offset the offset into config space + * @param size the size of the write + * @param data the data to write + */ + virtual void writeConfig(int offset, const uint8_t data); + virtual void writeConfig(int offset, const uint16_t data); + virtual void writeConfig(int offset, const uint32_t data); + + + /** + * Read from the PCI config space data that is stored locally. This may be + * overridden by the device but at some point it will eventually call this + * for normal operations that it does not need to override. + * @param offset the offset into config space + * @param size the size of the read + * @param data pointer to the location where the read value should be stored + */ + virtual void readConfig(int offset, uint8_t *data); + virtual void readConfig(int offset, uint16_t *data); + virtual void readConfig(int offset, uint32_t *data); + + /** + * 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 // __DEV_PCIDEV_HH__ |