From 08330bf0be8fed443402ffd1664b2ca4d16b6f8e Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Thu, 27 Jul 2000 01:04:11 +0000
Subject: Port of RTEMS to the ARM processor family by Eric Valette
 <valette@crf.canon.fr> and Emmanuel Raguet <raguet@crf.canon.fr> of Canon CRF
 - Communication Dept.  This port includes a basic BSP that is sufficient to
 link hello world.

---
 c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c | 119 ++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c

(limited to 'c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c')

diff --git a/c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c b/c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c
new file mode 100644
index 0000000000..b4f2d14931
--- /dev/null
+++ b/c/src/lib/libbsp/arm/arm_bare_bsp/irq/irq.c
@@ -0,0 +1,119 @@
+/* irq.c
+ *
+ *  This file contains the implementation of the function described in irq.h
+ *
+ *  CopyRight (C) 2000 Canon Research France SA.
+ *  Emmanuel Raguet,  mailto:raguet@crf.canon.fr
+ *
+ *  The license and distribution terms for this file may be
+ *  found in 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 <registers.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/apiext.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;
+    
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     */
+    HdlTable = VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != default_int_handler) {
+      return 0;
+    }
+    
+    _CPU_ISR_Disable(level);
+
+    /*
+     * store the new handler
+     */
+    *(HdlTable + irq->name) = irq->hdl;
+
+    /*
+     * Here is the code to install an interrupt vector
+     * for the BSP : unmask INT, ....
+     * ........................
+     */
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+int BSP_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    rtems_irq_hdl *HdlTable;
+  
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if the handler is actually connected. If not issue an error.
+     */
+    HdlTable = VECTOR_TABLE;
+    if (*(HdlTable + irq->name) != irq->hdl) {
+      return 0;
+    }
+    _CPU_ISR_Disable(level);
+
+    /*
+     * Here is the code to uninstall an interrupt vector
+     * for the BSP : mask INT, ....
+     * ........................
+     */
+
+    /*
+     * restore the default irq value
+     */
+    *(HdlTable + irq->name) = default_int_handler;
+          
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+
+
+void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
+{
+  /*
+   * Process pending signals that have not already been
+   * processed by _Thread_Displatch. 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();
+  }
+}
-- 
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