1 files changed, 155 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/edb7312/irq/irq.c b/c/src/lib/libbsp/arm/edb7312/irq/irq.c
new file mode 100644
index 0000000000..cb46d9c301
--- /dev/null
+++ b/c/src/lib/libbsp/arm/edb7312/irq/irq.c
@@ -0,0 +1,155 @@
+/*
+ * Cirrus EP7312 Intererrupt handler
+ *
+ * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
+ *	
+ * Copyright (c) 2002 by Charlie Steader <charlies@poliac.com>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *
+ *  $Id$
+*/
+#include <bsp.h>
+#include <irq.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/apiext.h>
+#include <ep7312.h>
+
+/*
+ * This function check that the value given for the irq line
+ * is valid.
+ */
+
+static int isValidInterrupt(int irq)
+{
+  if ( (irq < 0) || (irq > BSP_MAX_INT))
+    return 0;
+  return 1;
+}
+
+/*
+ * -------------------- RTEMS Single Irq Handler Mngt Routines ----------------
+ */
+
+int BSP_install_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    rtems_irq_hdl *HdlTable;
+    rtems_interrupt_level level;
+    
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     */
+    HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != default_int_handler) {
+      return 0;
+    }
+    
+    _CPU_ISR_Disable(level);
+
+    /*
+     * store the new handler
+     */
+    *(HdlTable + irq->name) = irq->hdl;
+
+    /*
+     * unmask interrupt
+     */
+    if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI)
+    {
+        /* interrupt managed by INTMR1 and INTSR1 */
+        *EP7312_INTMR1 |= (1 << irq->name);
+    }
+    else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX)
+    {
+        /* interrupt managed by INTMR2 and INTSR2 */
+        *EP7312_INTMR2 |= (1 << (irq->name - 16));
+    }
+    else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2)
+    {
+        /* interrupt managed by INTMR2 and INTSR2 */
+        *EP7312_INTMR2 |= (1 << (irq->name - 7));
+    }
+    else if(irq->name == BSP_DAIINT)
+    {
+        /* interrupt managed by INTMR3 and INTSR3 */
+        *EP7312_INTMR3 |= (1 << (irq->name - 21));
+    }
+    
+    /*
+     * Enable interrupt on device
+     */
+    if(irq->on)
+    {
+    	irq->on(irq);
+    }
+    
+    _CPU_ISR_Enable(level);
+    
+    return 1;
+}
+
+int BSP_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    rtems_irq_hdl *HdlTable;
+    rtems_interrupt_level level;
+  
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if the handler is actually connected. If not issue an error.
+     */
+    HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != irq->hdl) {
+      return 0;
+    }
+    _CPU_ISR_Disable(level);
+
+    /*
+     * mask interrupt
+     */
+    if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI)
+    {
+        /* interrupt managed by INTMR1 and INTSR1 */
+        *EP7312_INTMR1 &= ~(1 << irq->name);
+    }
+    else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX)
+    {
+        /* interrupt managed by INTMR2 and INTSR2 */
+        *EP7312_INTMR2 &= ~(1 << (irq->name - 16));
+    }
+    else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2)
+    {
+        /* interrupt managed by INTMR2 and INTSR2 */
+        *EP7312_INTMR2 &= ~(1 << (irq->name - 7));
+    }
+    else if(irq->name == BSP_DAIINT)
+    {
+        /* interrupt managed by INTMR3 and INTSR3 */
+        *EP7312_INTMR3 &= ~(1 << (irq->name - 21));
+    }
+    
+    /*
+     * Disable interrupt on device
+     */
+    if(irq->off)
+        irq->off(irq);
+    
+    /*
+     * restore the default irq value
+     */
+    *(HdlTable + irq->name) = default_int_handler;
+    
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+