Siarhei Siamashka <siarhei.siamas...@gmail.com> writes: > On Sunday 07 February 2010, Tom wrote: >> Siarhei Siamashka wrote: >> > 725233: PLD instructions executed with PLD data forwarding >> > enabled can result in a processor deadlock >> > >> > Signed-off-by: Siarhei Siamashka <siarhei.siamas...@gmail.com> >> >> Please add a detailed comment on the errata. > > The short summary is pretty much complete (PLD data forwarding is not working > correctly and needs to be turned off to prevent problems). Though it really > makes sense to add that: > 1. only r1pX revisions of Cortex-A8 are affected > 2. performance impact is practically non-existant > > The detailed description of this erratum is available in the official > Cortex-A8 errata list. I'm not sure about directly copying full erratum > description text here. Anyway, this workaround would be better submitted > by somebody TI. I'm just "guilty" of triggering this deadlock with some > ARM NEON optimizations from pixman library, so feel a bit of responsibility > for it too. > >> Also looks like this jumping to ROM code. >> Can this be done without a ROM code call ? > > I just added it to the part of code which is already doing similar things > (sets L1NEON and other bits from AUXCR with some icky looking assembly via > ROM code call). Most likely it can be also done in some other way.
L2AUX is only writable in secure mode, which on GP devices implies using a ROM call. Nothing wrong with that. -- Måns Rullgård m...@mansr.com _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
