On Wed, 2017-09-13 at 23:27 +1000, Nicholas Piggin wrote: > On Wed, 13 Sep 2017 09:18:34 +1000 > Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote: > > > On Wed, 2017-09-13 at 02:05 +1000, Nicholas Piggin wrote: > > > This implements a way to raise system reset interrupts on other > > > cores. This has not yet been tested on DD2 or with deeper sleep > > > states. > > > > Reminds me, we need to workaround a bug with XSCOMs on P9 > > > > PSCOMs to core in the range 20010A80-20010Ab8 (list below) can fail > > occasionally with an error of 4 (PCB_ADDRESS_ERROR). We need to > > (silently) retry up to 32 times. > > [snip] > > So, just put a loop into xscom_read and xscom_write for those > addresses for P9 chips?
Right. Well, the top bit of the address needs filtering since it's the target core, ie, 0x20 is core 0, 0x21 is core 1 etc... to 0x37. Cheers, Ben.
