[U-Boot] [PATCH] mpc83xx: Make it boot again

[Kumar Gala]

On Nov 4, 2010, at 11:47 AM, Wood Scott-B07421 wrote:

> Joakim Tjernlund wrote:
>> Trial and error suggests that map_flash_by_law1 needs
>> an isync(padding with 4 nop's also did the trick)
>> after updating LBLAWAR1 to make sure the the change has
>> reached the HW before continuing with the code that depends on it.
>> Add an isync to remap_flash_by_law0 for good measure too.
> 
> To be totally safe, we probably want to do a readback plus twi (to turn a data dependency into a flow dependency) before the isync.

We only do the 'twi' for loads/in_beX not stores/out_beX.

- k