On Tue, 02 Jun 2009 18:00:53 +0200, Stefan Reinauer <stepan@coresystems.de>
wrote:
  
On 02.06.2009 17:13 Uhr, Joseph Smith wrote:
    
Hello,
Was anyone aware we are doing the do_ram_command() wrong on the i8xx
nothbridges?
We are sending the ram commands to all memory and doing our dummy reads
      
at
    
the end.
I just found an Intel doc that says we are supposed to do all the ram
commands to each row of memory.

      
...
    
I will work on a patch for the i830, we should probibly fix this on the
other Intle northbridges.

      
Check the i945 code for an example on how to do it... older chipsets
might/might not be different...

    
Would it be different for SDRAM vs DDR ?

  

You need a couple more steps (different MRS commands etc) for DDR, but the loop itself is basically the same. 


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