PCI configuration transaction

["Jim Chan" <tan264@hotmail.com>]

Hi guys

Is the Configuration Mechanism described in the PCI spec for software 
implementation(ie OS implementation).

During the configuration, if the configuration software detect a PCI-PCI 
bridge, it will know that there is another PCI bus at the other end of the 
bridge(let say PCI bus 1). So it will scan all the devices on PCI BUS 1. How 
can the software actually pass thru the bridge and be able to scan PCI BUS 
1. We have a physical hardware(which is the bridge) between two PCI bus. I 
just wonder how can the conf. software be able to go pass the bridge and 
scan the bus on the other side.

The target device number are decoded within the bridge and the decoder 
asserts the appropriate IDSEL output signal. How do we implement this 
decoder?? Can we do the assignment of IDSEL to device number by software??

Thanks

Jimmy







_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.