On 06/01/2012 05:30 PM, Benjamin Herrenschmidt wrote: > BTW. My point of view is that this whole business about MSR:DE is a HW > design bug. There should be -no- (absolutely 0) interaction between the > SW state and the HW debugger for normal operations unless the user of > the debugger explicitly wants to change some state.
I agree entirely, and e500mc at least has less of this than e500v2 (not sure if it still needs MSR[DE], but supposedly it doesn't have the requirement for there to be a valid instruction at the debug vector, which is lots of fun when booting). But this isn't exactly something Freescale is going to replace existing chips over. Getting all the way to zero interaction would require a completely separate debug facility so software can debug at the same time. I'd be all for that (and let's throw in a third, for the hypervisor), but I'm not the one that needs to be convinced. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
