Changeset e55fcd2 in mainline

Timestamp:

2013-01-01T17:03:52Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2a77eaa2

Parents:

0acd339

Message:

arm32: Disable branch predictors for general operations.

Branch prediction needs maintenance.

File:

• kernel/arch/arm32/src/cpu/cpu.c (modified) (1 diff)

kernel/arch/arm32/src/cpu/cpu.c

@@ -112 +112 @@
         /* Turn off accessed flag, RAZ/WI prior to armv7 */
         control_reg &= ~(CP15_R1_ACCESS_FLAG_EN | CP15_R1_HW_ACCESS_FLAG_EN);
-        /* Enable branch prediction RAZ/WI if not supported */
-        control_reg |= CP15_R1_BRANCH_PREDICT_EN;
+        /* Disable branch prediction RAZ/WI if not supported */
+        control_reg &= ~CP15_R1_BRANCH_PREDICT_EN;
 
         /* Unaligned access is supported on armv6+ */