MPC82xx -- DPRAM1

[morten.banzon at axxessit.no]

Hi,

I am using 2.6.9 for a mpc8280 project, and am having trouble using dpram1 
from offset zero, which I need for a mcc hdlc driver.

 In the file include/asm-ppc/cpm2.h there is a constant CPM_DATAONLY_BASE
In the same file the code comment say that the first 128 bytes are used 
for SMC1 and SMC2. 

When I examine the smc (cpm_uart) driver i do not find any reference to 
this region of the dpram1.
I have replaced the calls to cpm_dpalloc with cpm_dpalloc_fixed and an 
adress way up in the dpram1 region.

My question is; do you know which code is using the dpram1 addresses below 
CPM_DATAONLY_BASE ?

This region must be used by something (smc ?), because when I clear from 
offset 0x00 to 0x80 the serial port stop responding.
I can ssh to the device and things seems to be normal util I try to reboot 
the system, whereupon everything hangs.

I am stuck, so if you have any suggestions, please advice.


Regards,
Morten