Changeset 9eec7bc in mainline

Timestamp:

2013-01-20T00:11:41Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

9043e7e0

Parents:

3fa509b

Message:

arm32: Enable branch predictors on Cortex-A8.

It seems to work ok on bbxm.

File:

• kernel/arch/arm32/src/cpu/cpu.c (modified) (2 diffs)

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

@@ -132 +132 @@
         /* Turn off accessed flag, RAZ/WI prior to armv7 */
         control_reg &= ~(SCTLR_ACCESS_FLAG_EN_FLAG | SCTLR_HW_ACCESS_FLAG_EN_FLAG);
-        /* Disable branch prediction RAZ/WI if not supported */
-        control_reg &= ~SCTLR_BRANCH_PREDICT_EN_FLAG;
 
         /* Unaligned access is supported on armv6+ */
@@ -162 +160 @@
           * Cortex-A8 TRM ch. 7.2.6 p. 7-4 (PDF 245) */
         control_reg |= SCTLR_INST_CACHE_EN_FLAG;
+        /* Enable branch prediction RAZ/WI if not supported */
+        control_reg |= SCTLR_BRANCH_PREDICT_EN_FLAG;
 #endif
         SCTLR_write(control_reg);