1 files changed, 113 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/cortexm3/up_doirq.c b/nuttx/arch/arm/src/cortexm3/up_doirq.c
new file mode 100644
index 000000000..8c749ce5f
--- /dev/null
+++ b/nuttx/arch/arm/src/cortexm3/up_doirq.c
@@ -0,0 +1,113 @@
+/****************************************************************************
+ * arch/arm/src/cortexm3/up_doirq.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/types.h>
+#include <nuttx/irq.h>
+#include <nuttx/arch.h>
+#include <assert.h>
+#include "up_arch.h"
+#include "os_internal.h"
+#include "up_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+uint32 *up_doirq(int irq, uint32 *regs)
+{
+  up_ledon(LED_INIRQ);
+#ifdef CONFIG_SUPPRESS_INTERRUPTS
+  PANIC(OSERR_ERREXCEPTION);
+#else
+  if ((unsigned)irq < NR_IRQS)
+    {
+       /* Current regs non-zero indicates that we are processing
+        * an interrupt; current_regs is also used to manage
+        * interrupt level context switches.
+        */
+
+       current_regs = regs;
+
+       /* Mask and acknowledge the interrupt */
+
+       up_maskack_irq(irq);
+
+       /* Deliver the IRQ */
+
+       irq_dispatch(irq, regs);
+
+       /* If a context switch occurred while processing the interrupt
+        * then current_regs may have change value.  If we return any value
+        * different from the input regs, then the lower level will know
+        * that a context switch occurred during interrupt processing.
+        */
+
+       regs = current_regs;
+
+       /* Indicate that we are no long in an interrupt handler */
+
+       current_regs = NULL;
+
+       /* Unmask the last interrupt (global interrupts are still
+        * disabled.
+        */
+
+       up_enable_irq(irq);
+    }
+  up_ledoff(LED_INIRQ);
+#endif
+  return regs;
+}