Imported Upstream version 3.2.2

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

diff --git a/gcell/ibm/sync/spu_source/wait_for_completion.h b/gcell/ibm/sync/spu_source/wait_for_completion.h
new file mode 100644 (file)
index 0000000..ea7bdbe
--- /dev/null
+++ b/gcell/ibm/sync/spu_source/wait_for_completion.h
@@ -0,0 +1,82 @@
+/* --------------------------------------------------------------  */
+/* (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                                              */
+#ifndef _SPU_WAIT_FOR_COMPLETION_H_
+#define _SPU_WAIT_FOR_COMPLETION_H_
+
+#include "sync_utils.h"
+#include <spu_mfcio.h>
+#include "sync_irq.h"
+#include "completion.h"
+
+/* _wait_for_completion 
+ *    Internal routine to wait for completion to
+ *    become true (!0).  When completion is false,
+ *    uses lock line reservation lost event to 
+ *    sleep until the variable has been changed.
+ */
+static __inline void _wait_for_completion(completion_ea_t completion)
+{
+    DECL_COMPLETION_VARS();
+    s32 status;
+
+    status = 1;
+
+    ea64.ull = ALIGN128_EA(completion);
+    offset = OFFSET128_EA_U32(completion);
+    do {
+        MFC_DMA(buf, ea64, size, tagid, MFC_GETLLAR_CMD);
+        spu_readch(MFC_RdAtomicStat);
+        /* if the completion variable has been set elsewhere
+         * (a signal or broadcast function has been called 
+         * then we get out of the loop, and reset the variable */
+        if (likely(buf[offset] != 0)) {
+            /* decrement the variable */
+            buf[offset]--;
+            MFC_DMA(buf, ea64, size, tagid, MFC_PUTLLC_CMD);
+            spu_readch(MFC_RdAtomicStat);
+            status = 0;
+        }
+    } while (status != 0);
+}
+
+
+
+#endif /* _SPU_WAIT_FOR_COMPLETION_H_ */