On Wed, Sep 14, 2011 at 2:15 AM, Dave Martin <dave.martin@xxxxxxxxxx> wrote: <snip> > With regard to Thumb-2 kernels, what code is responsible for > performing the jump to tegra_secondary_startup? arch/arm/mach-tegra/platsmp.c puts the physical address of tegra_secondary_startup into the reset vector, and then brings the cpu out of reset. As far as I know, it is always in ARM mode, but it is possible that it comes through ROM code that ends with a bx, allowing it to be entered in Thumb mode. > If the jump is done by making an exception return from some firmware, > you may find you hit tegra_secondary_starup in ARM state, and > everything will go horribly wrong... > > It could be worth making the secondary kernel entry point ARM code > unconditionally (just as is now done for the primary kernel entry > point). That seems safest. > Cheers > ---Dave > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
