On Fri, May 20, 2011 at 12:37:58PM +0100, Dave Martin wrote: > Where do we save/restore r8_FIQ..r13_FIQ, r13_IRQ, r13_UND and r13_ABT? > (I'm assuming there's no reason to save/restore r14 or SPSR for any > exception mode, since we presumably aren't going to suspend/resume > from inside an exception handler (?)) There is absolutely no need to save r13 for _any_ of the abort modes. As we have to set them up at boot time to fixed values, we keep that code around, and in the resume paths we re-execute that initialization code. cpu_init(). Out of the list you mention above, the only thing which isn't saved are the FIQ registers, and that's a problem for S2RAM too, and should be done by arch/arm/kernel/fiq.c hooking into the suspend paths. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
