On Mon, 2016-05-16 at 11:40 +1000, Michael Ellerman wrote: > On Fri, 2016-05-13 at 17:41 -0700, Daniel Walker wrote: > > > Hi, > > > > I noticed that udbg is missing for fsl booke , or at least it doesn't > > appear to be implemented. I don't know a great deal about fsl book. I'm > > working on an MCP85XX at the moment , and I was looking into the udbg > > system to get prints. It looks like fsl booke might be similar enough to > > 44x to use the already implemented udbg routines for that. > > > > Does anyone have suggestion on this ? Is fsl booke missing because it's > > not possible to have this, or no one ever needed it ? > > Yeah I noticed this recently too. > > I don't know the history of why there isn't one, I suspect probably it just > was > never merged upstream. Hopefully someone from Freescale can chime in. > > On my machine (p5020ds) there is a real UART, so it should just be a matter > of > creating a mapping for it and then using the existing udbg_16550 code.
We don't have udbg support for these chips anywhere. I usually just dump the logbuffer from an external debugger (or bisect with a branch-to-self using the external debugger to see if it was reached, if the logbuffer is empty) when there's a boot problem. It'd be nice to have; it just never got done. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
