Commit 789fcfd7 authored by Nitin Garg's avatar Nitin Garg Committed by Peng Fan
Browse files

MLK-10524: iMX6x: Implement workaround for Cortex-A9 errata 845369



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: default avatarNitin Garg <nitin.garg@freescale.com>
(cherry picked from commit 70ad44e523680de67dd8b7a7505d7f27799980ee)
parent 20b8ac7b
......@@ -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
......
......@@ -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)
......
......@@ -21,6 +21,7 @@
#define CONFIG_ARM_ERRATA_751472
#define CONFIG_ARM_ERRATA_794072
#define CONFIG_ARM_ERRATA_761320
#define CONFIG_ARM_ERRATA_845369
#define CONFIG_BOARD_POSTCLK_INIT
#define CONFIG_LDO_BYPASS_CHECK
......
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