arm/sam4cm: use custom vectors to make smp_call work with exception_c…

…ommon

Signed-off-by: buxiasen <[email protected]>

arch/arm/src/sam34/Kconfig

@@ -247,6 +247,7 @@ config ARCH_CHIP_SAM4CM
 	default n
 	select ARCH_HAVE_MULTICPU
 	select ARCH_HAVE_TICKLESS
+	select ARCH_HAVE_CUSTOM_VECTORS
 
 config ARCH_CHIP_SAM4L
 	bool

arch/arm/src/sam34/Make.defs

@@ -29,6 +29,10 @@ include armv7-m/Make.defs
 CHIP_CSRCS  = sam_allocateheap.c sam_irq.c sam_lowputc.c sam_serial.c
 CHIP_CSRCS += sam_start.c
 
+ifeq ($(CONFIG_ARCH_HAVE_CUSTOM_VECTORS),y)
+CHIP_CSRCS += sam_vectors.c
+endif
+
 # Configuration-dependent SAM3/4 files
 
 ifneq ($(CONFIG_SCHED_TICKLESS),y)

arch/arm/src/sam34/sam_vectors.c

@@ -0,0 +1,113 @@
+/****************************************************************************
+ * arch/arm/src/sam34/sam_vectors.c
+ *
+ *   Copyright (C) 2012 Michael Smith. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/irq.h>
+
+#include "chip.h"
+#include "arm_internal.h"
+#include "ram_vectors.h"
+#include "nvic.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define IDLE_STACK      (_ebss + CONFIG_IDLETHREAD_STACKSIZE)
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/* Chip-specific entrypoint */
+
+extern void __start(void);
+
+static void start(void)
+{
+  /* Zero lr to mark the end of backtrace */
+
+  asm volatile ("mov lr, #0\n\t"
+                "b  __start\n\t");
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/* Common exception entrypoint */
+
+extern void exception_common(void);
+extern void exception_direct(void);
+
+/****************************************************************************
+ * Public data
+ ****************************************************************************/
+
+/* The v7m vector table consists of an array of function pointers, with the
+ * first slot (vector zero) used to hold the initial stack pointer.
+ *
+ * As all exceptions (interrupts) are routed via exception_common, we just
+ * need to fill this array with pointers to it.
+ *
+ * Note that the [ ... ] designated initializer is a GCC extension.
+ */
+
+const void * const _vectors[] locate_data(".vectors")
+                              aligned_data(VECTAB_ALIGN) =
+{
+  /* Initial stack */
+
+  IDLE_STACK,
+
+  /* Reset exception handler */
+
+  start,
+
+  /* Vectors 2 - n point directly at the generic handler */
+
+  [2 ... NVIC_IRQ_PENDSV] = &exception_common,
+  [(NVIC_IRQ_PENDSV + 1) ... (SAM_IRQ_SMP_CALL0 - 1)]
+                          = &exception_direct,
+  [SAM_IRQ_SMP_CALL0]     = &exception_common,
+  [(SAM_IRQ_SMP_CALL0 + 1) ... (SAM_IRQ_SMP_CALL1 - 1)]
+                          = &exception_direct,
+  [SAM_IRQ_SMP_CALL1]     = &exception_common,
+  [(SAM_IRQ_SMP_CALL1 + 1) ... (15 + ARMV7M_PERIPHERAL_INTERRUPTS)]
+                          = &exception_direct
+};