1 files changed, 84 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/hppa1.1/semaphore/semaphore.h b/c/src/lib/libcpu/hppa1.1/semaphore/semaphore.h
new file mode 100644
index 0000000000..04f709cf64
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+++ b/c/src/lib/libcpu/hppa1.1/semaphore/semaphore.h
@@ -0,0 +1,84 @@
+/*
+ *  File:       $RCSfile$
+ *  Project:    PixelFlow
+ *  Created:    94/11/29
+ *  RespEngr:   tony e bennett
+ *  Revision:   $Revision$
+ *  Last Mod:   $Date$
+ *
+ *  COPYRIGHT (c) 1994 by Division Incorporated
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of Division Incorporated not be
+ *      used in advertising or publicity pertaining to distribution
+ *      of the software without specific, written prior permission.
+ *      Division Incorporated makes no representations about the
+ *      suitability of this software for any purpose.
+ *
+ *  Description:
+ *      HPPA fast spinlock semaphores based on LDCWX instruction.
+ *      These semaphores are not known to RTEMS.
+ *
+ *  TODO:
+ *
+ *  $Id$
+ */
+
+#ifndef _INCLUDE_SEMAPHORE_H
+#define _INCLUDE_SEMAPHORE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * This structure has hardware requirements.
+ * LDCWX opcode requires 16byte alignment for the lock
+ * 'lock' must be first member of structure.
+ */
+
+#define SEM_ALIGN  16
+
+typedef volatile struct {
+
+    rtems_unsigned32 lock __attribute__ ((aligned (SEM_ALIGN)));
+
+    rtems_unsigned32 flags;
+
+    void *owner_tcb;            /* for debug/commentary only */
+
+    rtems_unsigned32 user;      /* for use by user */
+
+} hppa_semaphore_t;
+
+/*
+ * Values for flags
+ */
+
+#define HPPA_SEM_IN_USE            0x0001  /* semaphore owned by somebody */
+#define HPPA_SEM_NO_SPIN           0x0002  /* don't spin if unavailable */
+#define HPPA_SEM_INITIALLY_FREE    0x0004  /* init it to be free */
+
+/*
+ * Caller specifiable flags
+ */
+
+#define HPPA_SEM_CALLER_FLAGS (HPPA_SEM_NO_SPIN | HPPA_SEM_INITIALLY_FREE)
+
+void hppa_semaphore_pool_initialize(void *pool_base, int pool_size);
+
+rtems_unsigned32  hppa_semaphore_acquire(hppa_semaphore_t *sp, int flag);
+
+void hppa_semaphore_release(hppa_semaphore_t *sp);
+
+hppa_semaphore_t *hppa_semaphore_allocate(rtems_unsigned32 which, int flag);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ! _INCLUDE_SEMAPHORE_H */