From: Nitin Garg nitin.garg@freescale.com
Under very rare timing circumstances, transition into streaming mode might create a data corruption. Exists on all Cortex-A9 revisions.
Signed-off-by: Nitin Garg nitin.garg@freescale.com ---
README | 1 + arch/arm/cpu/armv7/start.S | 5 +++++ 2 files changed, 6 insertions(+)
diff --git a/README b/README index 5d57eb9..13ef31a 100644 --- a/README +++ b/README @@ -683,6 +683,7 @@ The following options need to be configured: CONFIG_ARM_ERRATA_751472 CONFIG_ARM_ERRATA_794072 CONFIG_ARM_ERRATA_761320 + CONFIG_ARM_ERRATA_845369
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 5ed0f45..db77adb 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -164,6 +164,11 @@ ENTRY(cpu_init_cp15) orr r0, r0, #1 << 21 @ set bit #21 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)