Hi Bill, On Mon, Jan 5, 2015 at 8:25 PM, Bill Pringlemeir <bpringlem...@nbsps.com> wrote:
> $ git show 3ff46cc42b9d73d01c86df9044257 > > /* > * Default/weak exception vectors relocation routine > * > * This routine covers the standard ARM cases: normal (0x00000000), > * high (0xffff0000) and VBAR. SoCs which do not comply with any of > * the standard cases must provide their own, strong, version. > */ > > The code looks correct. However, the imx25 has the HAB and some default > vectors set up. Do you assume they overwrite the HAB vectors? For the > imx25, the 'V bit = 0' for the physical HAB ROM location, but it can be > remapped to 0xffff0000. However, there is nothing there (0xffff0000) > initially and this only makes sense with the MMU enabled. > > I am not sure what happened before; why it worked. Maybe you could > define an empty relocate_vectors() in the imx25 board file and see if > everything is ok? I don't think that a write to the ROM code will BUS > error? If a write BUS errors, then the empty routine will work/boot. > However, u-boot will not be handling the vectors unless we hook in the > IRAM at 0x7801FFFF, where I guess the ROM code (at address zero) > branches too. I have just fixed by using the same approach done on mx27 with its own relocate.S: arch/arm/cpu/arm926ejs/mx27/relocate.S Will submit the patch shortly. Thanks _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
