VOID NTAPI HalpInitializePciStubs ( VOID )
Definition at line 674 of file pci.c.
Referenced by BootMain(), HalpInitializePciBus(), and HalReportResourceUsage().
{
    PPCI_REGISTRY_INFO_INTERNAL PciRegistryInfo;
    UCHAR PciType;
    PPCIPBUSDATA BusData = (PPCIPBUSDATA)HalpFakePciBusHandler.BusData;
    ULONG i;
    PCI_SLOT_NUMBER j;
    ULONG VendorId = 0;

    /* Query registry information */
    PciRegistryInfo = HalpQueryPciRegistryInfo();
    if (!PciRegistryInfo)
    {
        /* Assume type 1 */
        PciType = 1;
    }
    else
    {
        /* Get the type and free the info structure */
        PciType = PciRegistryInfo->HardwareMechanism & 0xF;
        ExFreePool(PciRegistryInfo);
    }

    /* Initialize the PCI lock */
    KeInitializeSpinLock(&HalpPCIConfigLock);

    /* Check the type of PCI bus */
    switch (PciType)
    {
        /* Type 1 PCI Bus */
        case 1:

            /* Copy the Type 1 handler data */
            RtlCopyMemory(&PCIConfigHandler,
                          &PCIConfigHandlerType1,
                          sizeof(PCIConfigHandler));

            /* Set correct I/O Ports */
            BusData->Config.Type1.Address = PCI_TYPE1_ADDRESS_PORT;
            BusData->Config.Type1.Data = PCI_TYPE1_DATA_PORT;
            break;

        /* Type 2 PCI Bus */
        case 2:

            /* Copy the Type 1 handler data */
            RtlCopyMemory(&PCIConfigHandler,
                          &PCIConfigHandlerType2,
                          sizeof (PCIConfigHandler));

            /* Set correct I/O Ports */
            BusData->Config.Type2.CSE = PCI_TYPE2_CSE_PORT;
            BusData->Config.Type2.Forward = PCI_TYPE2_FORWARD_PORT;
            BusData->Config.Type2.Base = PCI_TYPE2_ADDRESS_BASE;

            /* Only 16 devices supported, not 32 */
            BusData->MaxDevice = 16;
            break;

        default:

            /* Invalid type */
            DbgPrint("HAL: Unnkown PCI type\n");
    }

    /* Loop all possible buses */
    for (i = 0; i < 256; i++)
    {
        /* Loop all devices */
        for (j.u.AsULONG = 0; j.u.AsULONG < 32; j.u.AsULONG++)
        {
            /* Query the interface */
            if (HaliPciInterfaceReadConfig(NULL,
                                           i,
                                           j,
                                           &VendorId,
                                           0,
                                           sizeof(ULONG)))
            {
                /* Validate the vendor ID */
                if ((USHORT)VendorId != PCI_INVALID_VENDORID)
                {
                    /* Set this as the maximum ID */
                    HalpMaxPciBus = i;
                    break;
                }
            }
        }
    }

    /* We're done */
    HalpPCIConfigInitialized = TRUE;
}
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