1 files changed, 95 insertions, 0 deletions
diff --git a/cpukit/score/include/rtems/score/smplock.h b/cpukit/score/include/rtems/score/smplock.h
new file mode 100644
index 0000000000..a20d9260a4
--- /dev/null
+++ b/cpukit/score/include/rtems/score/smplock.h
@@ -0,0 +1,95 @@
+/**
+ *  @file  rtems/score/smplock.h
+ *
+ *  This include file defines the interface for atomic locks
+ *  which can be used in multiprocessor configurations.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2011.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#ifndef _RTEMS_LOCK_H
+#define _RTEMS_LOCK_H
+
+#include <rtems/score/isr.h>
+
+/**
+ *  @defgroup RTEMS Lock Interface
+ *
+ */
+
+/**@{*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  This type is used to lock elements for atomic access.
+ *
+ *  @note This type may move to RTEMS.
+ */
+typedef volatile uint32_t SMP_lock_Control;
+
+/**
+ *  @brief Initialize a Lock
+ *
+ *  This method is used to initialize the lock at @a lock.
+ *
+ *  @param [in] lock is the address of the lock to obtain.
+ *
+ *  @note This lock may be "too low" here.  It may need to move
+ *         out of the BSP area.
+ */
+void _SMP_lock_Spinlock_Initialize(
+  SMP_lock_Control *lock
+);
+
+/**
+ *  @brief Obtain a Lock
+ *
+ *  This method is used to obtain the lock at @a lock.
+ *
+ *  @param [in] lock is the address of the lock to obtain.
+ *
+ *  @return This method returns with processor interrupts disabled.
+ *          The previous level is returned.
+ *
+ *  @note This lock may be "too low" here.  It may need to move
+ *         out of the BSP area.
+ */
+ISR_Level _SMP_lock_Spinlock_Obtain(
+  SMP_lock_Control *lock
+);
+
+/**
+ *  @brief Release a Lock
+ *
+ *  This method is used to release the lock at @a lock.
+ *
+ *  @param [in] lock is the address of the lock to obtain.
+ *
+ *  @note This lock may be "too low" here.  It may need to move
+ *         out of the BSP area.
+ */
+void _SMP_lock_Spinlock_Release(
+  SMP_lock_Control  *lock,
+  ISR_Level         level
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+/**@}*/
+
+#endif
+/* end of include file */