1 files changed, 161 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/gba/irq/irq.c b/c/src/lib/libbsp/arm/gba/irq/irq.c
new file mode 100644
index 0000000000..fbf93f17cd
--- /dev/null
+++ b/c/src/lib/libbsp/arm/gba/irq/irq.c
@@ -0,0 +1,161 @@
+/**
+ *  @file irq.c
+ *
+ *  This file contains the implementation of the function described in irq.h.
+ */
+/*
+ *  RTEMS GBA BSP
+ *
+ *  Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
+ *
+ *  Copyright (c) 2002 by Charlie Steader <charlies@poliac.com>
+ *
+ *  Copyright (c) 2004 by Markku Puro <markku.puro@kopteri.net>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+#include <irq.h>
+#include <gba_registers.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/apiext.h>
+
+
+/**
+ *  @brief isValidInterrupt function check that the value given for the irq line is valid.
+ *
+ *  @param  irq irq number
+ *  @return status code TRUE/FALSE (0/1)
+ */
+static int isValidInterrupt(int irq)
+{
+  if ( (irq < 0) || (irq > BSP_MAX_INT)) {
+     return 0;
+  }
+  return 1;
+}
+
+/*
+ * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
+ */
+
+
+/**
+ *  @brief BSP_install_rtems_irq_handler function install rtems irq handler.
+ *
+ *  @param  irq irq connect data
+ *  @return status code TRUE/FALSE (0/1)
+ */
+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 *) (unsigned32)VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != default_int_handler) {
+       return 0;
+    }
+
+    _CPU_ISR_Disable(level);
+
+    /*
+     * store the new handler
+     */
+    *(HdlTable + irq->name) = irq->hdl;
+
+    /*
+     * ack pending interrupt
+     */
+    GBA_REG_IF |= (1 << (irq->name));
+
+    /*
+     * initialize the control register for the concerned interrupt
+     */
+    GBA_REG_IE |= (1 << (irq->name));
+
+    /*
+     * Enable interrupt on device
+     */
+    irq->on(irq);
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+/**
+ *  @brief BSP_remove_rtems_irq_handler function removes rtems irq handler.
+ *
+ *  @param  irq irq connect data
+ *  @return status code TRUE/FALSE (0/1)
+ */
+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 *) (unsigned32)VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != irq->hdl) {
+       return 0;
+    }
+    _CPU_ISR_Disable(level);
+
+    /*
+     * mask at INT controller level
+     */
+    GBA_REG_IE &= ~(1 << irq->name);
+
+    /*
+     * Disable interrupt on device
+     */
+    irq->off(irq);
+
+    /*
+     * restore the default irq value
+     */
+    *(HdlTable + irq->name) = default_int_handler;
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+
+/**
+ *  @brief _ThreadProcessSignalsFromIrq function check that the value given for the irq line is valid.
+ *
+ *  @param  cxt exeption frame
+ *  @return None
+ */
+void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
+{
+  /*
+   * Process pending signals that have not already been
+   * processed by _Thread_Dispatch. This happens quite
+   * unfrequently : the ISR must have posted an action
+   * to the current running thread.
+   */
+  if ( _Thread_Do_post_task_switch_extension ||
+       _Thread_Executing->do_post_task_switch_extension )
+  {
+     _Thread_Executing->do_post_task_switch_extension = FALSE;
+     _API_extensions_Run_postswitch();
+  }
+}