Re: could linux support to configure the PLB-PCI bridge of PPC440 into adapter mode

hi Matthias:
   thank for your reply.
   according to information you provide, i should set the proper parameter 
of register of PPC440GX in U-BOOT(I use u-boot as bootloader),such as 
PAE,PHCE,PISE of SDR0_XCR and BAR etc.  during the time of linux kernel 
booting, I turn off CONFIG_PCI , let linux kernel don't initialize the PCI 
bus as host bridge and set PLB address in kernel.  then after the linux 
system operated, the ppc440gx could act as adapter mode. does my 
understanding correct? 
   i really appreciate your help.

 chen 

From: Matthias Fuchs <redacted>
To: hilichen2000@msn.com
CC: linuxppc-embedded@ozlabs.org
Subject: Re: could linux support to configure the PLB-PCI bridge of PPC440 

into	adapter mode

Date: Mon, 19 Jun 2006 16:11:54 +0200

Hi chen,

it's not easy to setup the PCI-to-PLB mapping in a generic way so 
that is gets into the kernel. Also it might be too late when the 
adapter OS configures the bridge. The bridge must be setup quickly 
after reset so that the host OS can assign resources to the card. 
The bootloader of your board might be a good place to setup of the 
adapter stuff. At least number and sizes of the needed address 
spaces should be setup early.
The PLB address can be setup or modified later (e.g. from the target 
OS).

quoted

hi,now I want to use PPC440GX as PCI adapter card bridge. according 
to user manual, the PLB-PCI bridge should be configured to Adapter 
mode. after check some code of PCI of linux, i find the linux only 
support configuring the PLB-PCI bridge into HOST mode. Is my 
understanding correct ? if the normal version of linux don't 
support the adapter mode, could i found the patch?

Probably not.

Matthias

_________________________________________________________________
享用世界上最大的电子邮件系统― MSN Hotmail。  http://www.hotmail.com