1 files changed, 66 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/atomic_64.h b/arch/sparc/include/asm/atomic_64.h
new file mode 100644
index 000000000..6b235d3d1
--- /dev/null
+++ b/arch/sparc/include/asm/atomic_64.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* atomic.h: Thankfully the V9 is at least reasonable for this
+ *           stuff.
+ *
+ * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
+ */
+
+#ifndef __ARCH_SPARC64_ATOMIC__
+#define __ARCH_SPARC64_ATOMIC__
+
+#include <linux/types.h>
+#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
+
+#define ATOMIC64_INIT(i)	{ (i) }
+
+#define atomic_read(v)		READ_ONCE((v)->counter)
+#define atomic64_read(v)	READ_ONCE((v)->counter)
+
+#define atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
+#define atomic64_set(v, i)	WRITE_ONCE(((v)->counter), (i))
+
+#define ATOMIC_OP(op)							\
+void atomic_##op(int, atomic_t *);					\
+void atomic64_##op(s64, atomic64_t *);
+
+#define ATOMIC_OP_RETURN(op)						\
+int atomic_##op##_return(int, atomic_t *);				\
+s64 atomic64_##op##_return(s64, atomic64_t *);
+
+#define ATOMIC_FETCH_OP(op)						\
+int atomic_fetch_##op(int, atomic_t *);					\
+s64 atomic64_fetch_##op(s64, atomic64_t *);
+
+#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
+
+ATOMIC_OPS(add)
+ATOMIC_OPS(sub)
+
+#undef ATOMIC_OPS
+#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
+
+ATOMIC_OPS(and)
+ATOMIC_OPS(or)
+ATOMIC_OPS(xor)
+
+#undef ATOMIC_OPS
+#undef ATOMIC_FETCH_OP
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
+
+#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
+
+static inline int atomic_xchg(atomic_t *v, int new)
+{
+	return xchg(&v->counter, new);
+}
+
+#define atomic64_cmpxchg(v, o, n) \
+	((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
+#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
+
+s64 atomic64_dec_if_positive(atomic64_t *v);
+#define atomic64_dec_if_positive atomic64_dec_if_positive
+
+#endif /* !(__ARCH_SPARC64_ATOMIC__) */