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