1 files changed, 109 insertions, 0 deletions
diff --git a/rtemsbsd/powerpc/include/asm/atomic.h b/rtemsbsd/powerpc/include/asm/atomic.h
new file mode 100644
index 00000000..0db27562
--- /dev/null
+++ b/rtemsbsd/powerpc/include/asm/atomic.h
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+#ifndef	_ASM_ATOMIC_H_
+#define	_ASM_ATOMIC_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <machine/atomic.h>
+
+typedef struct {
+	volatile u_int counter;
+} atomic_t;
+
+#define	ATOMIC_INIT(v) { (v) }
+
+#define	atomic_add(i, v)		atomic_add_return((i), (v))
+#define	atomic_sub(i, v)		atomic_sub_return((i), (v))
+#define	atomic_inc_return(v)		atomic_add_return(1, (v))
+#define	atomic_add_negative(i, v)	(atomic_add_return((i), (v)) < 0)
+#define	atomic_sub_and_test(i, v)	(atomic_sub_return((i), (v)) == 0)
+#define	atomic_dec_and_test(v)		(atomic_sub_return(1, (v)) == 0)
+#define	atomic_inc_and_test(v)		(atomic_add_return(1, (v)) == 0)
+#define atomic_dec_return(v)             atomic_sub_return(1, (v))
+
+static inline int
+atomic_add_return(int i, atomic_t *v)
+{
+	return i + atomic_fetchadd_int(&v->counter, i);
+}
+
+static inline int
+atomic_sub_return(int i, atomic_t *v)
+{
+	return atomic_fetchadd_int(&v->counter, -i) - i;
+}
+
+static inline void
+atomic_set(atomic_t *v, int i)
+{
+	atomic_store_rel_int(&v->counter, i);
+}
+
+static inline int
+atomic_read(atomic_t *v)
+{
+	return atomic_load_acq_int(&v->counter);
+}
+
+static inline int
+atomic_inc(atomic_t *v)
+{
+	return atomic_fetchadd_int(&v->counter, 1) + 1;
+}
+
+static inline int
+atomic_dec(atomic_t *v)
+{
+	return atomic_fetchadd_int(&v->counter, -1) - 1;
+}
+
+static inline int atomic_add_unless(atomic_t *v, int a, int u)
+{
+        int c, old;
+        c = atomic_read(v);
+        for (;;) {
+                if (unlikely(c == (u)))
+                        break;
+                old = atomic_cmpset_int(&v->counter, c, c + (a));
+                if (likely(old == c))
+                        break;
+                c = old;
+        }
+        return c != (u);
+}
+
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
+
+
+
+#endif	/* _ASM_ATOMIC_H_ */