RAM 6.0 BUX II Series Guia do Utilizador descarregar pdf (Página 102)

VxWorks

BSP Developer’s Guide, 6.0

* the interrupt assignment correctly. The design of this

* routine should handle any board design.

* RETURNS: N/A

UCHAR sysPciAutoconfigIntrAssign

(

PCI_SYSTEM * pSys, /* input: AutoConfig system information */

PCI_LOC * pFunc,

UCHAR intPin /* input: interrupt pin number */

)

{

UCHAR irqValue = 0xff; /* Calculated value */

int bus = pSys->bus; /* PCI bus number */

int device = pSys->device; /* PCI device number */

int i;

/* if no interrupt is required, return default (unassigned) value */

if (intPin == 0)

return irqValue;

/* return the vector for this device as the irqValue */

for (i = 0; intIrqTable[i].intPin != 0; i++)

{

if ((bus == intIrqTable[i].bus) &&

(device == intIrqTable[i].device) &&

(intPin == intIrqTable[i].intPin))

{

irqValue = intIrqTable[i].irq;

break;

}

return (irqValue);

}

All of the above PCI configuration code should be included in sysBusPci.c.

However, there must be a call to sysPciAutoConfig( ) from somewhere in sysLib.c.

Modify sysHwInit2( ) in sysLib.c so that it makes a call to sysPciAutoConfig( ) to

initialize the BSP support for PCI devices. This is done after the clock is connected.

If the serial line does not reside on the PCI bus, initialize the serial line prior to the

PCI support. Other devices should be configured after PCI. The following is some

sample code:

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RAM 6.0 BUX II Series Guia do Utilizador Página 102