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
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