Changes to resulting previous merge of arch/c5471 and arch/dm320 into arch/arm and

also to adding lpc214x to arch/arm.


git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@194 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 119 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/dm320/dm320_decodeirq.c b/nuttx/arch/arm/src/dm320/dm320_decodeirq.c
new file mode 100644
index 000000000..fad9f0faf
--- /dev/null
+++ b/nuttx/arch/arm/src/dm320/dm320_decodeirq.c
@@ -0,0 +1,119 @@
+/********************************************************************************
+ * dm320/dm320_decodeirq.c
+ *
+ *   Copyright (C) 2007 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 Gregory Nutt 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 <debug.h>
+#include "up_arch.h"
+#include "os_internal.h"
+#include "up_internal.h"
+
+/********************************************************************************
+ * Definitions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Data
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Data
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Functions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Funtions
+ ********************************************************************************/
+
+void up_decodeirq(uint32* regs)
+{
+#ifdef CONFIG_SUPPRESS_INTERRUPTS
+  lib_lowprintf("Unexpected IRQ\n");
+  current_regs = regs;
+  PANIC(OSERR_ERREXCEPTION);
+#else
+  /* Decode the interrupt.  First, fetch the interrupt id register. */
+
+  uint16 irqentry = getreg16(DM320_INTC_IRQENTRY0);
+
+  /* The irqentry value is an offset into a table.  Zero means no interrupt. */
+
+  if (irqentry != 0)
+    {
+      /* If non-zero, then we can map the table offset into an IRQ number */
+
+      int irq = (irqentry >> 2) - 1;
+
+      /* Verify that the resulting IRQ number is valie */
+
+      if ((unsigned)irq < NR_IRQS)
+        {
+          /* Mask and acknowledge the interrupt */
+
+          up_maskack_irq(irq);
+
+          /* 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;
+
+          /* Deliver the IRQ */
+
+          irq_dispatch(irq, 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);
+        }
+    }
+#endif
+}