[U-Boot] Is it possible to use 2GB or DDR on MPC834x?

Scott Wood scottwood at freescale.com
Tue Dec 30 17:45:16 CET 2008


Valeriy Glushkov wrote:
> Hi Guys!
> 
> On my mpc8347 based board I can access 1GB of DDR with mapping 4 of 256MB 
> ranges via IBAT\DBAT registers.
> 
> But with the 2 GB of DDR it's impossible to map them with BATs (there are 
> only 8 BATs in the e300 core and the rest 4 of them are already used).
> 
> All the mpc83xx examples in the U-boot tree seem to use <=1GB of SDRAM, so 
> they use BATs to map them.
> 
> Any suggestions are highly appreciated.

Why do you need to access all 2GB from u-boot?

-Scott


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