Support Functions for PCI Access

C++ (OlsDef.h) *Macro

// Bus Number, Device Number and Function Number to PCI Device Address
#define PciBusDevFunc(Bus, Dev, Func) ((Bus&0xFF)<<8) | ((Dev&0x1F)<<3) | (Func&7)
// PCI Device Address to Bus Number
#define PciGetBus(address)            ((address>>8) & 0xFF)
// PCI Device Address to Device Number
#define PciGetDev(address)            ((address>>3) & 0x1F)
// PCI Device Address to Function Number
#define PciGetFunc(address)           (address&7)

C# (OpenLibSys.cs)

// Bus Number, Device Number and Function Number to PCI Device Address
public uint PciBusDevFunc(uint bus, uint dev, uint func)
{
    return ((bus&0xFF)<<8) | ((dev&0x1F)<<3) | (func&7);
}
// PCI Device Address to Bus Number
public uint PciGetBus(uint address)
{
    return ((address>>8) & 0xFF);
}
// PCI Device Address to Device Number
public uint PciGetDev(uint address)
{
    return ((address>>3) & 0x1F);
}
// PCI Device Address to Function Number
public uint PciGetFunc(uint address)
{
    return (address&7);
}

PCI Device Address

Requirements

• WinRing0 1.0 or later

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