diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/start.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 1c7e6f0..b180944 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -187,6 +187,27 @@ ENTRY(cpu_init_cp15) skip_errata_798870: #endif +#ifdef CONFIG_ARM_ERRATA_801819 + cmp r2, #0x24 @ Applies to lt including R2p4 + bgt skip_errata_801819 @ skip if not affected rev + cmp r2, #0x20 @ Applies to including and above R2p0 + blt skip_errata_801819 @ skip if not affected rev + mrc p15, 0, r0, c0, c0, 6 @ pick up REVIDR reg + and r0, r0, #1 << 3 @ check REVIDR[3] + cmp r0, #1 << 3 + beq skip_errata_801819 @ skip erratum if REVIDR[3] is set + + mrc p15, 0, r0, c1, c0, 1 @ read auxilary control register + orr r0, r0, #3 << 27 @ Disables streaming. All write-allocate + @ lines allocate in the L1 or L2 cache. + orr r0, r0, #3 << 25 @ Disables streaming. All write-allocate + @ lines allocate in the L1 cache. + push {r1-r5} @ Save the cpu info registers + bl v7_arch_cp15_set_acr + pop {r1-r5} @ Restore the cpu info - fall through +skip_errata_801819: +#endif + #ifdef CONFIG_ARM_ERRATA_454179 cmp r2, #0x21 @ Only on < r2p1 bge skip_errata_454179 |