On Thu, 2014-03-06 at 09:48 -0600, Kumar Gala wrote: > On Jan 23, 2014, at 6:11 AM, Alexander Graf <ag...@suse.de> wrote: > > > > > On 21.01.2014, at 03:25, Scott Wood <scottw...@freescale.com> wrote: > > > >> On Sun, 2014-01-19 at 16:19 +0100, Alexander Graf wrote: > >>> With the qemu-ppce500 machine type we can run the same board with > >>> either an e500v2 or an e500mc core plugged in. > >>> > >>> This means that the IVOR setup can't be based on compile time decisions, > >>> so instead we have to do a runtime check which CPU generation we're > >>> running on. > >> > >> Is this really the only place where you ran into this? > > > > Yup. At least the only place where the difference actually matters for a VM. > > > >> Also consider that you'll be adding extra size, and some of our 85xx > >> targets are pretty close to the limit as is (though at least this code > >> isn't used in SPLs). > >> > >> I guess nobody ever bothered to set IVORs for e6500-specific exceptions. > >> > >> For that matter, I don't see why we need this code at all. These aren't > >> the addresses that U-Boot keeps its exception vectors at; it's setting > >> them up for the OS, apparently trying to imitate some other type of > >> book3e chip that has fixed ivors. Apparently U-Boot has done this only > >> since 2009 (commit 26f4cdba6b51deab4ec99d60be381244068ef950), so it's > >> not even something that an OS could depend on (and certainly Linux > >> doesn't). So I don't see the point. > > > > Kumar, do you remember why you put this in? Was it only for prototyping > > purposes? > > > > I certainly wouldn't mind removing the whole thing altogether. > > > > > > Alex > > > I feel like we did have some support for timer & external interrupts in > u-boot. Its been a while since I looked.
This has nothing to do with U-Boot's own exception handlers -- this is what U-Boot is currently doing just prior to entering the OS. -Scott _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
