diff options
Diffstat (limited to 'arch/arm/boot')
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 390aa92ef04d..7b7d95c84641 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -396,12 +396,18 @@ __armv3_mpu_cache_on: mov r0, #0 mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3 + /* + * ?? ARMv3 MMU does not allow reading the control register, + * does this really work on ARMv3 MPU? + */ mrc p15, 0, r0, c1, c0, 0 @ read control reg @ .... .... .... WC.M orr r0, r0, #0x000d @ .... .... .... 11.1 + /* ?? this overwrites the value constructed above? */ mov r0, #0 mcr p15, 0, r0, c1, c0, 0 @ write control reg + /* ?? invalidate for the second time? */ mcr p15, 0, r0, c7, c0, 0 @ invalidate whole cache v3 mov pc, lr |