ARM: Add workaround for Cortex-A9 errata 845369
PATCH RESEND 1/2 ARM: Add workaround for Cortex-A9 errata 845369
From: Nitin Garg <[email protected]>
Under very rare timing circumstances, transition into streaming mode might create a data corruption. Exists on all Cortex-A9 revisions.
---
Original patch:
http://lists.denx.de/pipermail/u-boot/2015-April/209724.html
README | 1 + arch/arm/cpu/armv7/start.S | 5 +++++ 2 files changed, 6 insertions(+)
README +1 -0
@@ -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
arch/arm/cpu/armv7/start.S +5 -0
@@ -163,6 +163,11 @@ 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)
Signature · 1 line
1.8.4
PATCH RESEND 1/2 ARM: Add workaround for Cortex-A9 errata 845369
My bad. Please ignore the two patches 1/2 and 2/2.
Regards,
Peng.
Quoted 52 lines · Peng Fan
From: Nitin Garg <[email protected]>
Under very rare timing circumstances, transition into streaming mode might create a data corruption. Exists on all Cortex-A9 revisions.
Signed-off-by Peng Fan <[email protected]>Signed-off-by Nitin Garg <[email protected]>Cc Stefano Babic <[email protected]>Cc Fabio Estevam <[email protected]>Cc Albert Aribaud <[email protected]>---
Original patch:
http://lists.denx.de/pipermail/u-boot/2015-April/209724.htmlREADME | 1 +
arch/arm/cpu/armv7/start.S| 5 +++++2 files changed, 6 insertions(+)README +1
-0@@ -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 thearch/arm/cpu/armv7/start.S +5
-0@@ -163,6 +163,11 @@ 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)Signature · 1 line
1.8.4
PATCH RESEND 2/2 imx: mx6: Enable ARM errata workaround for 845369
In reply to Peng FanFrom: Nitin Garg <[email protected]>
Since MX6 is Cortex-A9 r2p10, enable software workaround for errata 845369.
---
Original patch:
http://lists.denx.de/pipermail/u-boot/2015-April/209725.html
include/configs/mx6_common.h | 1 + 1 file changed, 1 insertion(+)
include/configs/mx6_common.h +1 -0
@@ -22,6 +22,7 @@#define CONFIG_ARM_ERRATA_751472 #define CONFIG_ARM_ERRATA_794072 #define CONFIG_ARM_ERRATA_761320 +#define CONFIG_ARM_ERRATA_845369 #ifndef CONFIG_SYS_L2CACHE_OFF #define CONFIG_SYS_L2_PL310
Signature · 1 line
1.8.4