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-rw-r--r--sys/contrib/openzfs/include/os/freebsd/spl/sys/atomic.h182
1 files changed, 182 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/include/os/freebsd/spl/sys/atomic.h b/sys/contrib/openzfs/include/os/freebsd/spl/sys/atomic.h
new file mode 100644
index 000000000000..4227e5f7d3ec
--- /dev/null
+++ b/sys/contrib/openzfs/include/os/freebsd/spl/sys/atomic.h
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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, 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 AUTHORS 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 AUTHORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _OPENSOLARIS_SYS_ATOMIC_H_
+#define _OPENSOLARIS_SYS_ATOMIC_H_
+
+#include <sys/types.h>
+#include <machine/atomic.h>
+
+#define atomic_sub_64 atomic_subtract_64
+
+#if defined(__i386__) && (defined(_KERNEL) || defined(KLD_MODULE))
+#define I386_HAVE_ATOMIC64
+#endif
+
+#if defined(__i386__) || defined(__amd64__) || defined(__arm__)
+/* No spurious failures from fcmpset. */
+#define STRONG_FCMPSET
+#endif
+
+#if !defined(__LP64__) && !defined(__mips_n32) && \
+ !defined(ARM_HAVE_ATOMIC64) && !defined(I386_HAVE_ATOMIC64) && \
+ !defined(HAS_EMULATED_ATOMIC64)
+extern void atomic_add_64(volatile uint64_t *target, int64_t delta);
+extern void atomic_dec_64(volatile uint64_t *target);
+extern uint64_t atomic_swap_64(volatile uint64_t *a, uint64_t value);
+extern uint64_t atomic_load_64(volatile uint64_t *a);
+extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta);
+extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp,
+ uint64_t newval);
+#endif
+
+#define membar_producer atomic_thread_fence_rel
+
+static __inline uint32_t
+atomic_add_32_nv(volatile uint32_t *target, int32_t delta)
+{
+ return (atomic_fetchadd_32(target, delta) + delta);
+}
+
+static __inline uint_t
+atomic_add_int_nv(volatile uint_t *target, int delta)
+{
+ return (atomic_add_32_nv(target, delta));
+}
+
+static __inline void
+atomic_inc_32(volatile uint32_t *target)
+{
+ atomic_add_32(target, 1);
+}
+
+static __inline uint32_t
+atomic_inc_32_nv(volatile uint32_t *target)
+{
+ return (atomic_add_32_nv(target, 1));
+}
+
+static __inline void
+atomic_dec_32(volatile uint32_t *target)
+{
+ atomic_subtract_32(target, 1);
+}
+
+static __inline uint32_t
+atomic_dec_32_nv(volatile uint32_t *target)
+{
+ return (atomic_add_32_nv(target, -1));
+}
+
+#ifndef __sparc64__
+static inline uint32_t
+atomic_cas_32(volatile uint32_t *target, uint32_t cmp, uint32_t newval)
+{
+#ifdef STRONG_FCMPSET
+ (void) atomic_fcmpset_32(target, &cmp, newval);
+#else
+ uint32_t expected = cmp;
+
+ do {
+ if (atomic_fcmpset_32(target, &cmp, newval))
+ break;
+ } while (cmp == expected);
+#endif
+ return (cmp);
+}
+#endif
+
+#if defined(__LP64__) || defined(__mips_n32) || \
+ defined(ARM_HAVE_ATOMIC64) || defined(I386_HAVE_ATOMIC64) || \
+ defined(HAS_EMULATED_ATOMIC64)
+static __inline void
+atomic_dec_64(volatile uint64_t *target)
+{
+ atomic_subtract_64(target, 1);
+}
+
+static inline uint64_t
+atomic_add_64_nv(volatile uint64_t *target, int64_t delta)
+{
+ return (atomic_fetchadd_64(target, delta) + delta);
+}
+
+#ifndef __sparc64__
+static inline uint64_t
+atomic_cas_64(volatile uint64_t *target, uint64_t cmp, uint64_t newval)
+{
+#ifdef STRONG_FCMPSET
+ (void) atomic_fcmpset_64(target, &cmp, newval);
+#else
+ uint64_t expected = cmp;
+
+ do {
+ if (atomic_fcmpset_64(target, &cmp, newval))
+ break;
+ } while (cmp == expected);
+#endif
+ return (cmp);
+}
+#endif
+#endif
+
+static __inline void
+atomic_inc_64(volatile uint64_t *target)
+{
+ atomic_add_64(target, 1);
+}
+
+static __inline uint64_t
+atomic_inc_64_nv(volatile uint64_t *target)
+{
+ return (atomic_add_64_nv(target, 1));
+}
+
+static __inline uint64_t
+atomic_dec_64_nv(volatile uint64_t *target)
+{
+ return (atomic_add_64_nv(target, -1));
+}
+
+#if !defined(COMPAT_32BIT) && defined(__LP64__)
+static __inline void *
+atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
+{
+ return ((void *)atomic_cas_64((volatile uint64_t *)target,
+ (uint64_t)cmp, (uint64_t)newval));
+}
+#else
+static __inline void *
+atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
+{
+ return ((void *)atomic_cas_32((volatile uint32_t *)target,
+ (uint32_t)cmp, (uint32_t)newval));
+}
+#endif /* !defined(COMPAT_32BIT) && defined(__LP64__) */
+
+#endif /* !_OPENSOLARIS_SYS_ATOMIC_H_ */