host.hh

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 * Copyright (c) 2015 ARM Limited
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 * The license below extends only to copyright in the software and shall
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 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
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 * modified or unmodified, in source code or in binary form.
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 * met: redistributions of source code must retain the above copyright
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 * redistributions in binary form must reproduce the above copyright
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#ifndef __DEV_PCI_HOST_HH__
#define __DEV_PCI_HOST_HH__
 
#include "dev/io_device.hh"
#include "dev/pci/types.hh"
 
struct PciHostParams;
struct GenericPciHostParams;
 
class PciDevice;
class Platform;
 
class PciHost : public PioDevice
{
  public:
    PciHost(const PciHostParams *p);
    virtual ~PciHost();
 
  public:
    class DeviceInterface
    {
        friend class ::PciHost;
 
      protected:
        DeviceInterface(PciHost &host, PciBusAddr &bus_addr, PciIntPin pin);
 
      public:
        DeviceInterface() = delete;
        void operator=(const DeviceInterface &) = delete;
 
        const std::string name() const;
 
        void postInt();
 
        void clearInt();
 
        Addr pioAddr(Addr addr) const { return host.pioAddr(busAddr, addr); }
 
        Addr memAddr(Addr addr) const { return host.memAddr(busAddr, addr); }
 
        Addr dmaAddr(Addr addr) const { return host.dmaAddr(busAddr, addr); }
 
      protected:
        PciHost &host;
 
        const PciBusAddr busAddr;
        const PciIntPin interruptPin;
    };
 
    virtual DeviceInterface registerDevice(PciDevice *device,
                                           PciBusAddr bus_addr, PciIntPin pin);
 
  protected:
    virtual void postInt(const PciBusAddr &bus_addr, PciIntPin pin) = 0;
 
    virtual void clearInt(const PciBusAddr &bus_addr, PciIntPin pin) = 0;
 
    virtual Addr pioAddr(const PciBusAddr &bus_addr, Addr pci_addr) const = 0;
 
    virtual Addr memAddr(const PciBusAddr &bus_addr, Addr pci_addr) const = 0;
 
 
    virtual Addr dmaAddr(const PciBusAddr &bus_addr, Addr pci_addr) const = 0;
 
  protected:
    PciDevice *getDevice(const PciBusAddr &addr);
 
    const PciDevice *getDevice(const PciBusAddr &addr) const;
 
  private:
    std::map<PciBusAddr, PciDevice *> devices;
};
 
class GenericPciHost : public PciHost
{
  public:
    GenericPciHost(const GenericPciHostParams *p);
    virtual ~GenericPciHost();
 
  public: // PioDevice
    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
 
    AddrRangeList getAddrRanges() const override;
 
  protected: // PciHost
    Addr pioAddr(const PciBusAddr &bus_addr, Addr pci_addr) const override {
        return pciPioBase + pci_addr;
    }
 
    Addr memAddr(const PciBusAddr &bus_addr, Addr pci_addr) const override {
        return pciMemBase + pci_addr;
    }
 
    Addr dmaAddr(const PciBusAddr &bus_addr, Addr pci_addr) const override {
        return pciDmaBase + pci_addr;
    }
 
  protected: // Configuration address space handling
    virtual std::pair<PciBusAddr, Addr> decodeAddress(Addr address);
 
  protected: // Interrupt handling
    void postInt(const PciBusAddr &addr, PciIntPin pin) override;
    void clearInt(const PciBusAddr &addr, PciIntPin pin) override;
 
    virtual uint32_t mapPciInterrupt(const PciBusAddr &bus_addr,
                                     PciIntPin pin) const;
 
  protected:
    Platform &platform;
 
    const Addr confBase;
    const Addr confSize;
    const uint8_t confDeviceBits;
 
    const Addr pciPioBase;
    const Addr pciMemBase;
    const Addr pciDmaBase;
};
 
#endif // __DEV_PCI_HOST_HH__