Re: Regarding PCIExpress Problem in MPC8641D

On Aug 21, 2007, at 7:09 AM, sivaji wrote:

Hai,

Currently I am involved in the testing of a MPC8641D based board  
designed by
us. We have planned to test the PCI Express interface through a  
back to back
interface, host being mpc8641d and target is mpc8548.

When trying a target DMA transaction we are not able to access the  
host
memory using pci Express bus. We are facingDMA Transfer Error.  
Without DMA
we are able to access the host memory from the target and target  
memory from
the host.


The processor rev number is 2.0. The external irq[0-3] are pulled  
down and
the polarity is active low and it is level sensitive.

Memory base address : 0x80000000 size:512MB
I/O base address    : 0xe2000000 size:16MB.
Kernel Version	    : 2.6.21

I suggest upgrading to 2.6.23-rc3.  There are a number of PCIe  
related fixes that have gone in.

- k