> On 20.05.16 10:26, Huan Wang wrote: > >> On 20.05.16 08:53, Huan Wang wrote: > >>>> On 05/19/2016 10:26 AM, Alison Wang wrote: > >>>>> To support loading a 32-bit OS, the execution state will change > >>>>> from > >>>>> AArch64 to AArch32 when jumping to kernel. > >>>>> > >>>>> The architecture information will be got through checking FIT > >>>>> image, then U-Boot will load 32-bit OS or 64-bit OS automatically. > >>>>> > >>>>> Signed-off-by: Ebony Zhu <ebony....@nxp.com> > >>>>> Signed-off-by: Alison Wang <alison.w...@nxp.com> > >>>>> Signed-off-by: Chenhui Zhao <chenhui.z...@nxp.com> > >>>>> --- > > [...] > > >>>>> --- a/common/image-fit.c > >>>>> +++ b/common/image-fit.c > >>>>> @@ -1163,7 +1163,8 @@ int fit_image_check_arch(const void *fit, > >>>>> int > >>>> noffset, uint8_t arch) > >>>>> if (fit_image_get_arch(fit, noffset, &image_arch)) > >>>>> return 0; > >>>>> return (arch == image_arch) || > >>>>> - (arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64); > >>>>> + (arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64) > || > >>>>> + (arch == IH_ARCH_ARM64 && image_arch == IH_ARCH_ARM); > >>>> > >>>> This should be a Kconfig option. ThunderX doesn't support AArch32 > >>>> execution. > >>> [Alison Wang] I can't understand your meaning. Can you clarify it? > >> > >> U-Boot supports the ThunderX SoC which uses Cavium's own ARMv8 core > >> implementation. That core does not support running AArch32 code. > >> > > [Alison Wang] Oh, I think your concern is that this function will not > > detect FIT image is wrong when loading 32-bit kernel on ThunderX, > right? > > > > Then what is your suggestion to fix this issue? > > My suggestion is to introduce a new Kconfig option that says "this arm64 > system can execute aarch32 code" which is set as default y. > CONFIG_THUNDERX would then set it to n if that's possible - or you'd > just set it to n in the thunderx defconfig. [Alison Wang] Good idea. I will do it in the next version. Thanks.
Best Regards, Alison Wang _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot