[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Are PCI bridges automatically configured?



Are PCI bridges automatically configured without any special code?

I changed the hardwired number of busses from 2 to BusCountPCI() in the mvme5500 pcifinddevice.c, and now I am seeing the PCI bus on the other side of the DEC 21150 bridge:

cexp_main>BSP_pciFindDevice(0x16d5,0x4d4d,0,pbus,pdev,pfun)
BSP_pciFindDevice: found 0x643011AB at 0/0/0
BSP_pciFindDevice: found 0x643011AB at 0/0/1
BSP_pciFindDevice: found 0x643011AB at 0/0/2
BSP_pciFindDevice: found 0x643011AB at 0/0/3
BSP_pciFindDevice: found 0x643011AB at 0/0/4
BSP_pciFindDevice: found 0x643011AB at 0/0/5
BSP_pciFindDevice: found 0x643011AB at 0/0/6
BSP_pciFindDevice: found 0x643011AB at 0/0/7
BSP_pciFindDevice: found 0x445716D5 at 0/6/0
BSP_pciFindDevice: found 0x00263388 at 0/10/0
BSP_pciFindDevice: found 0x000010E3 at 1/0/0
BSP_pciFindDevice: found 0x00221011 at 1/4/0
BSP_pciFindDevice: found 0x4D4D16D5 at 2/2/0
0x00000000 (0)
cexp_main>

so that last entry is my Acromag PMC341 card.

So now I guess I follow what I see in the libchip/network drivers for setting things up using "pci_write_config_foo"? I don't need any DEC 21150 specific code anywhere? Do the "pci_write_config_word" calls allocate resources?

Any "heads up" appreciated, I'm just getting started on this part.

Peter

Peter Dufault
HD Associates, Inc.