Merged eb/gcell-wip2 rev 10130:10152 into trunk.

[debian/gnuradio] / gcell / ibm / sync / spu_source / sync_irq.h

diff --git a/gcell/ibm/sync/spu_source/sync_irq.h b/gcell/ibm/sync/spu_source/sync_irq.h
new file mode 100644 (file)
index 0000000..feae65e
--- /dev/null
+++ b/gcell/ibm/sync/spu_source/sync_irq.h
@@ -0,0 +1,76 @@
+/* --------------------------------------------------------------  */
+/* (C)Copyright 2001,2007,                                         */
+/* International Business Machines Corporation,                    */
+/* Sony Computer Entertainment, Incorporated,                      */
+/* Toshiba Corporation,                                            */
+/*                                                                 */
+/* All Rights Reserved.                                            */
+/*                                                                 */
+/* Redistribution and use in source and binary forms, with or      */
+/* without modification, are permitted provided that the           */
+/* following conditions are met:                                   */
+/*                                                                 */
+/* - Redistributions of source code must retain the above copyright*/
+/*   notice, this list of conditions and the following disclaimer. */
+/*                                                                 */
+/* - 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.                               */
+/*                                                                 */
+/* - Neither the name of IBM Corporation 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.              */
+/* --------------------------------------------------------------  */
+/* PROLOG END TAG zYx                                              */
+/*
+ * irq.h - SPU interrupt management facilities.
+ * 
+ * These utilities help an "interrupt aware" library to manage
+ * state of SPU interrupts.  
+ */
+
+#ifndef __SPU_IRQ_H__
+#define __SPU_IRQ_H__
+
+#include <spu_intrinsics.h>
+#include "sync_utils.h"
+
+static inline u32 irq_mask(u32 newmask)
+{
+    u32 old, tmp = 0;
+
+    /* irq_mask
+     *    Set the interrupt mask to the newmask value,
+     *    and return its previous setting.  Will
+     *    detect and discard potential phantom
+     *    events.
+     */
+
+    old = spu_readch(SPU_RdEventMask);
+    spu_writech(SPU_WrEventMask, tmp);
+    if (spu_readchcnt(SPU_RdEventStat)) {
+        tmp = spu_readch(SPU_RdEventStat);
+        spu_writech(SPU_WrEventAck, tmp);
+    }
+    spu_writech(SPU_WrEventMask, newmask);
+
+    return old;
+}
+
+#endif /* __SPU_IRQ_H__ */