RAM 6.0 BUX II Series Guía de usuario descargar pdf (Pagina 95)

3 Porting a BSP to Custom Hardware

3.3 Finalizing Your BSP

This routine can use any combination of this input data to ascertain any special

initialization requirements of a particular type of bridge at a specified location on

the PCI bus hierarchy.

The default value is

NULL, so no pre-enumeration configuration is done.

PCI_BRIDGE_POST_CONFIG_FUNC_SET

The bridge post-configuration pass initialization routine is provided so that the

BSP Developer can initialize the bridge device after the bus that the bridge

implements is enumerated. This routine is specified by calling pciAutoCfgCtl( )

with the

PCI_BRIDGE_POST_CONFIG_FUNC_SET command as follows:

pciAutoCfgCtl(pCookie, PCI_BRIDGE_POST_CONFIG_FUNC_SET,

sysPciAutoconfigPostEnumBridgeInit);

This optional, user-specified routine takes as input both the bus-device-function

tuple, and a 32-bit quantity containing both the PCI device ID and vendor ID of the

device. The function prototype for this routine is as follows:

STATUS sysPciAutoconfigPostEnumBridgeInit

(

PCI_SYSTEM *pSys,

PCI_LOC *pLoc,

UINT devVend

);

This routine can use any combination of this input data to ascertain any special

initialization requirements of a particular type of bridge at a specified location on

the PCI bus hierarchy.

The default value is

NULL, so no post-enumeration configuration is done.

Delay Before Initialization

The specified routine is configured as a roll call routine.

If a roll call routine is configured, before any configuration is actually done, the roll

call routine is called repeatedly until it returns

TRUE. A return value of TRUE

indicates that either the specified number and type of devices named in the roll call

list have been found during PCI bus enumeration or that the timeout has expired

without finding all of the specified number and type of devices. In either case, it is

assumed that all of the PCI devices that are going to appear on the busses have

appeared and PCI bus configuration can proceed.

PCI_ROLLCALL_FUNC_SET

FUNCPTR * pArg

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RAM 6.0 BUX II Series Guía de usuario Pagina 95