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VxWorks

BSP Developer’s Guide, 6.0

The default value is NULL, so that no roll call delay is introduced before PCI

configuration.

Optional PCI Routines

PCI_INCLUDE_FUNC_SET

This device inclusion routine is specified by assigning a function pointer with the

PCI_INCLUDE_FUNC_SET pciAutoCfgCtl( ) command as follows:

pciAutoCfgCtl(pSystem, PCI_INCLUDE_FUNC_SET,sysPciAutoconfigInclude);

This optional routine takes as input both the bus-device-function tuple, and a

32-bit quantity containing both the PCI vendor ID and device ID of the routine. The

function prototype for this routine is as follows:

STATUS sysPciAutoconfigInclude

(

PCI_SYSTEM *pSys,

PCI_LOC *pLoc,

UINT devVend

);

This routine is called from pciAutoConfig( ) for each and every routine

encountered in the scan phase. The BSP developer can use any combination of the

input data to ascertain whether a device is to be excluded from the

autoconfiguration process. The exclusion routine then returns

ERROR if a device is

to be excluded, and

OK if a device is to be included in the autoconfiguration

process.

Note that PCI-to-PCI bridges cannot be excluded, regardless of the value returned

by the BSP device inclusion routine. Any return value is ignored for PCI-to-PCI

bridges.

The bridge device is always configured with proper primary, secondary, and

subordinate bus numbers in the device scanning phase, and proper I/O and

memory aperture settings in the configuration phase of the autoconfiguration

process regardless of the value returned by the BSP device inclusion routine.

The default value for the device inclusion routine is

NULL. This indicates that all

devices are autoconfigured.

PCI_INCLUDE_FUNC_SET

FUNCPTR * pArg

PCI_INT_ASSIGN_FUNC_SET

FUNCPTR * pArg

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RAM 6.0 BUX II Series Guía de usuario Pagina 96