arm: New function

Add and use function _ARMV7M_Set_exception_priority_and_handler().  Use
ARMV7M_EXCEPTION_PRIORITY_LOWEST define.

cpukit/score/cpu/arm/Makefile.am

@@ -27,6 +27,7 @@ libscorecpu_a_SOURCES += armv7m-context-switch.c
 libscorecpu_a_SOURCES += armv7m-exception-handler-get.c
 libscorecpu_a_SOURCES += armv7m-exception-handler-set.c
 libscorecpu_a_SOURCES += armv7m-exception-priority-get.c
+libscorecpu_a_SOURCES += armv7m-exception-priority-handler.c
 libscorecpu_a_SOURCES += armv7m-exception-priority-set.c
 libscorecpu_a_SOURCES += armv7m-initialize.c
 libscorecpu_a_SOURCES += armv7m-isr-dispatch.c

cpukit/score/cpu/arm/armv7m-exception-priority-handler.c

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2012 Sebastian Huber.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/score/cpu.h>
+
+#ifdef ARM_MULTILIB_ARCH_V7M
+
+#include <rtems/score/armv7m.h>
+
+void _ARMV7M_Set_exception_priority_and_handler(
+  int index,
+  int priority,
+  ARMV7M_Exception_handler handler
+)
+{
+  _ARMV7M_Set_exception_priority( index, priority );
+  _ARMV7M_Set_exception_handler( index, handler );
+}
+
+#endif /* ARM_MULTILIB_ARCH_V7M */

cpukit/score/cpu/arm/armv7m-initialize.c

@@ -31,14 +31,14 @@ void _CPU_Initialize( void )
    * also "ARMv7-M Architecture Reference Manual, Issue D" section B1.5.4
    * "Exception priorities and preemption".
    */
-  _ARMV7M_Set_exception_priority( ARMV7M_VECTOR_SVC, 0xff );
-  _ARMV7M_Set_exception_priority( ARMV7M_VECTOR_PENDSV, 0xff );
-  _ARMV7M_Set_exception_handler(
+  _ARMV7M_Set_exception_priority_and_handler(
     ARMV7M_VECTOR_SVC,
+    ARMV7M_EXCEPTION_PRIORITY_LOWEST,
     _ARMV7M_Supervisor_call
   );
-  _ARMV7M_Set_exception_handler(
+  _ARMV7M_Set_exception_priority_and_handler(
     ARMV7M_VECTOR_PENDSV,
+    ARMV7M_EXCEPTION_PRIORITY_LOWEST,
     _ARMV7M_Pendable_service_call
   );
 }

cpukit/score/cpu/arm/rtems/score/armv7m.h

@@ -459,6 +459,12 @@ void _ARMV7M_Set_exception_handler(
   ARMV7M_Exception_handler handler
 );
 
+void _ARMV7M_Set_exception_priority_and_handler(
+  int index,
+  int priority,
+  ARMV7M_Exception_handler handler
+);
+
 void _ARMV7M_Interrupt_service_enter( void );
 
 void _ARMV7M_Interrupt_service_leave( void );