On Sun, Apr 16, 2017 at 7:50 PM, Nisal Menuka <nisalmenuk...@gmail.com> wrote: > ARM errata 852421 and 852423 applies to r1p0, r1p1 and r1p2 > revisions of Cortex-A17 processors. These workarounds > exist in Linux kernel and I thought it would be better > to add them in to U-Boot. > > Signed-off-by: Nisal Menuka <nisalmenuk...@gmail.com> > --- > arch/arm/cpu/armv7/start.S | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S > index 1a6aee9..f06fd28 100644 > --- a/arch/arm/cpu/armv7/start.S > +++ b/arch/arm/cpu/armv7/start.S > @@ -283,6 +283,18 @@ skip_errata_621766: > skip_errata_725233: > #endif > > +#ifdef CONFIG_ARM_ERRATA_852421 > + mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register > + orr r0, r0, #1 << 24 @ set bit #24 > + mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register > +#endif
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