From: Nitin Garg <nitin.g...@freescale.com> A short loop including a DMB instruction might cause a denial of service on another processor which executes a CP15 broadcast operation. Exists on r1, r2, r3, r4 revisions.
Signed-off-by: Nitin Garg <nitin.g...@freescale.com> Acked-by: Dirk Behme <dirk.be...@de.bosch.com> --- README | 1 + arch/arm/cpu/armv7/start.S | 2 +- 2 files changed, 2 insertions(+), 1 deletions(-) diff --git a/README b/README index 7cb7c4f..a496c65 100644 --- a/README +++ b/README @@ -566,6 +566,7 @@ The following options need to be configured: CONFIG_ARM_ERRATA_742230 CONFIG_ARM_ERRATA_743622 CONFIG_ARM_ERRATA_751472 + CONFIG_ARM_ERRATA_794072 If set, the workarounds for these ARM errata are applied early during U-Boot startup. Note that these options force the diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index ac1e55a..f3830c8 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -205,7 +205,7 @@ ENTRY(cpu_init_cp15) mcr p15, 0, r0, c1, c0, 0 @ write system control register #endif -#ifdef CONFIG_ARM_ERRATA_742230 +#if (defined(CONFIG_ARM_ERRATA_742230) || defined(CONFIG_ARM_ERRATA_794072)) mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register orr r0, r0, #1 << 4 @ set bit #4 mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register -- 1.7.4.1 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot