RAM 6.0 BUX II Series Guia do Utilizador descarregar pdf (Página 86)

VxWorks

BSP Developer’s Guide, 6.0

sysPciAutoConfig( ) routine (located in sysBusPci.c) that makes a call to

pciAutoCfg( ).

If PCI autoconfiguration is not desired but one or more devices on the PCI bus are

to be supported, manual PCI configuration must be done. Normally, this requires

a sysPciConfig( ) routine, which makes the appropriate calls to configure the bus

and devices. However, it is recommended that autoconfiguration be used instead.

In order to support PCI autoconfiguration, the sysBusPci.c file must, at a

minimum, contain the sysPciAutoConfig( ) routine. For most BSPs, the file also

includes some or all of the following minor routines and, possibly, other PCI

configuration routines:

sysPciAutoConfigIntAssign( )

Assigns the “interrupt line” value.

sysPciAutoconfigInclude( )

Support routine to include or exclude support for specific devices or routines.

sysPciAutoconfigIntrAssign( )

Support routine for PCI interrupt assignment.

sysPciAutoconfigPreEnumBridgeInit( )

Bridge-specific initialization preceding autoconfiguration.

sysPciHostBridgeInit( )

Initializes the host bridge.

sysPciAutoconfigPostEnumBridgeInit( )

Bridge-specific initialization following autoconfiguration.

sysPciRollCallRtn( )

Check “roll call” list against list of PCI devices found.

The routines listed above are optional routines that the BSP may provide to assist

with PCI autoconfiguration. The routines are installed from within

sysPciAutoConfig( ) by issuing a call to pciAutoCfgCtl( ) as specified later in this

chapter (see Fast Back-To-Back Transmissions, p.80, and later sub-sections). When

PCI configuration occurs, the configuration code makes calls to these routines at

specific points during the initialization process.

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 188 189

Sem comentários

RAM 6.0 BUX II Series Guia do Utilizador Página 86