On 08/08/2017 07:34, Peng Fan wrote: > Under very rare timing circumstances, transitioning into streaming > mode might create a data corruption. Present on Two or more processors > or 1 core with ACP, all revisions. This erratum can be worked round > by setting bit[22] of the undocumented Diagnostic Control Register to 1. > > Signed-off-by: Peng Fan <peng....@nxp.com> > Cc: Albert Aribaud <albert.u.b...@aribaud.net> > Cc: Tom Rini <tr...@konsulko.com> > Cc: Stefano Babic <sba...@denx.de> > Cc: Fabio Estevam <fabio.este...@nxp.com> > --- > arch/arm/Kconfig | 3 +++ > arch/arm/cpu/armv7/start.S | 6 ++++++ > 2 files changed, 9 insertions(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 7f6ab4a..787f2b1 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -97,6 +97,9 @@ config ARM_ERRATA_833069 > config ARM_ERRATA_833471 > bool > > +config ARM_ERRATA_845369 > + bool > + > config ARM_ERRATA_852421 > bool > > diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S > index f06fd28..7b84a7a 100644 > --- a/arch/arm/cpu/armv7/start.S > +++ b/arch/arm/cpu/armv7/start.S > @@ -187,6 +187,12 @@ ENTRY(cpu_init_cp15) > mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register > #endif > > +#ifdef CONFIG_ARM_ERRATA_845369 > + mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register > + orr r0, r0, #1 << 22 @ set bit #22 > + mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register > +#endif > + > mov r5, lr @ Store my Caller > mrc p15, 0, r1, c0, c0, 0 @ r1 has Read Main ID Register (MIDR) > mov r3, r1, lsr #20 @ get variant field >
Reviewed-by: Stefano Babic <sba...@denx.de> Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
