On Nov 12, 2010, at 11:22 AM, Scott Wood wrote: > On Fri, 12 Nov 2010 09:58:53 -0600 > Kumar Gala <ga...@kernel.crashing.org> wrote: > >> >> 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. > > Yes, and the readback is a load.
following the store with a load should be sufficient I dont think we need the twi in this case. - k _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
