Re: [coreboot] Servo debug uart in Linux?

2016-10-07 Thread Duncan Laurie
On Fri, Oct 7, 2016 at 8:28 AM, Trammell Hudson wrote: > On Thu, Oct 06, 2016 at 11:27:01AM -0700, Duncan Laurie wrote: > > I may be mis-remembering and this might come up as ttyS0 in linux for > > skylake. (it is ttyS2 on apollolake...) Or just use a custom command > line > > like console=uart

Re: [coreboot] Servo debug uart in Linux?

2016-10-07 Thread Trammell Hudson
On Thu, Oct 06, 2016 at 11:27:01AM -0700, Duncan Laurie wrote: > I may be mis-remembering and this might come up as ttyS0 in linux for > skylake. (it is ttyS2 on apollolake...) Or just use a custom command line > like console=uart,mmio32,0xd1134000,115200n8 That commandline doesn't produce any o

Re: [coreboot] Servo debug uart in Linux?

2016-10-06 Thread Duncan Laurie
On Thu, Oct 6, 2016 at 11:08 AM, Duncan Laurie wrote: > On Thu, Oct 6, 2016 at 10:56 AM, Trammell Hudson wrote: > >> Is it possible to use the Skylake Servo debug UART in Linux or Xen? >> It doesn't show up as a normal 16550 (setserial reports "uart type >> unknown"), which is making debugging t

Re: [coreboot] Servo debug uart in Linux?

2016-10-06 Thread Duncan Laurie
On Thu, Oct 6, 2016 at 10:56 AM, Trammell Hudson wrote: > Is it possible to use the Skylake Servo debug UART in Linux or Xen? > It doesn't show up as a normal 16550 (setserial reports "uart type > unknown"), which is making debugging the payload kernel a little > frustrating. > > I've added lots

[coreboot] Servo debug uart in Linux?

2016-10-06 Thread Trammell Hudson
Is it possible to use the Skylake Servo debug UART in Linux or Xen? It doesn't show up as a normal 16550 (setserial reports "uart type unknown"), which is making debugging the payload kernel a little frustrating. I've added lots of "outb $0x80" calls to trace the Xen hypervisor and have figured ou