1 files changed, 67 insertions, 0 deletions
diff --git a/newlib/libc/machine/spu/spu_clock_stop.c b/newlib/libc/machine/spu/spu_clock_stop.c
new file mode 100644
index 000000000..da31b42c6
--- /dev/null
+++ b/newlib/libc/machine/spu/spu_clock_stop.c
@@ -0,0 +1,67 @@
+/*
+(C) Copyright IBM Corp. 2008
+
+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 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.
+*/
+
+/* SPU clock stop library service.  */
+#include <spu_timer.h>
+#include "spu_timer_internal.h"
+
+/* Stops the SPU clock:
+    * decrements clock start count
+    * when count is zero, disables the decrementer event and stops the
+      decrementer
+   Returns 0 on success and  <0 on failure:
+    * SPU_CLOCK_ERR_NOT_RUNNING - clock was already off
+    * SPU_CLOCK_ERR_TIMERS_ACTIVE - active timers exist
+    * SPU_CLOCK_ERR_STILL_RUNNING - start count was decremented but clock was
+      not stopped  */
+int
+spu_clock_stop (void)
+{
+  if (__spu_clock_startcnt == 0)
+    return SPU_CLOCK_ERR_NOT_RUNNING;
+
+  if (__spu_clock_startcnt == 1 && (__spu_timers_active || __spu_timers_handled))
+    return SPU_CLOCK_ERR_TIMERS_ACTIVE;
+
+  /* Don't stop clock if the clock is still in use.  */
+  if (--__spu_clock_startcnt != 0)
+    return SPU_CLOCK_ERR_STILL_RUNNING;
+
+  /* Clock stopped, stop decrementer.  */
+  __disable_spu_decr ();
+
+  /* Clock is enabled on clock start - restore to original state (saved at start).  */
+  if (__likely (!__spu_clock_state_was_enabled))
+    {
+      spu_idisable ();
+    }
+
+  return 0;
+}