Hi York, > -----Original Message----- > From: Sun York-R58495 > Sent: Wednesday, January 14, 2015 9:44 PM > On 01/14/2015 05:46 AM, Bhupesh Sharma wrote: > > This patch adds basic constructs in the ARMv8 u-boot code to handle > > and apply Cortex-A57 specific erratas. > > > > As and example, the framework showcases how erratas 833069, 826974 and > > 828024 can be handled and applied. > > > > Later on this framework can be extended to include other erratas. > > > > Signed-off-by: Bhupesh Sharma <bhupesh.sha...@freescale.com> > > --- > > Changes from v1: > > - Addressed York's comment about x29 usage and calling the > > core errata fxup function before the lowlevel_init function > > is called. > > > > arch/arm/cpu/armv8/start.S | 51 > ++++++++++++++++++++++++++++++++++++++++++ > > arch/arm/include/asm/macro.h | 20 +++++++++++++++++ > > 2 files changed, 71 insertions(+) > > > > diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S > > index 4b11aa4..df532f9 100644 > > --- a/arch/arm/cpu/armv8/start.S > > +++ b/arch/arm/cpu/armv8/start.S > > @@ -67,6 +67,9 @@ reset: > > msr cpacr_el1, x0 /* Enable FP/SIMD */ > > 0: > > > > + /* Apply ARM core specific erratas */ > > + bl apply_core_errata > > + > > /* > > * Cache/BPB/TLB Invalidate > > * i-cache is invalidated before enabled in icache_enable() @@ - > 97,6 > > +100,54 @@ master_cpu: > > > > > > /*-------------------------------------------------------------------- > > ---*/ > > > > +WEAK(apply_core_errata) > > + > > + /* For now, we support Cortex-A57 specific errata only */ > > + > > + /* Check if we are running on a Cortex-A57 core */ > > + branch_if_a57_core x0, 1f > > + b 2f > > +1: > > + bl apply_a57_core_errata > > + > > +2: > > + ret > > +ENDPROC(apply_core_errata) > > + > > Bhupesh, > > Have you tested the new code? I don't think it handles LR correctly. Your > code will be stuck. >
Yes, I have tested this on both the LS2085A simulator and emulator platforms. On emulator I tried u-boot boot-to-prompt and on simulator I tried linux boot-to-prompt. Both seem to be working fine. Regards, Bhupesh _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
