ACPIFindPCIDevice

Find PCI device by Bus:Dev:Fun

Syntax

APIRET APIENTRY ACPIFindPCIDevice(UINT32 Bus, UINT32 Dev, UINT32 Fun, UINT32 *PicIRQ, UINT32 *ApicIRQ, ACPI_HANDLE *Hdl, char *Component)

Parameters

Bus

PCI Bus

Dev

PCI Device

Fun

PCI Finction

Component

Name of caller for acpica$ log

Hdl

Finding handle for device

PicIRQ

IRQ in PIC mode or boot stage

ApicIRQ

IRQ in APIC mode or zero if problem or PIC mode

Example

 temp2 = temp3 = 0;
 rc = ACPIFindPCIDevice( (ULONG)busNr,                    // Bus
                         (ULONG)devNr,                    // Dev
                         (ULONG)(pcidev->devfn >> 8) & 7, // Function
                         &temp1,                          // PIC IRQ
                         &temp3,                          // APIC IRQ
                         NULL,                            // ACPI handle to finding device
                         "Uniaud32");                 // Name for acpi log
 if (!rc)
   {
    // Check APIC IRQ, if we have /SMP /APIC, must be set
     if (temp3)
       temp = (temp & (~0xff)) | (temp3 & 0xff);
       // Check PIC IRQ
     else if (temp1)
       temp = (temp & (~0xff)) | (temp1 & 0xff);
       dprintf(("pci_query_device: IRQs ACPI PIC%d APIC%d set:0x%x", temp1, temp3,temp));
   }

Links

• ACPI Toolkit Web Site