aarch64: allocate membarrier system call number

[urcu.git] / urcu / arch / aarch64.h

diff --git a/urcu/arch/aarch64.h b/urcu/arch/aarch64.h
new file mode 100644 (file)
index 0000000..946e1c6
--- /dev/null
+++ b/urcu/arch/aarch64.h
@@ -0,0 +1,64 @@
+#ifndef _URCU_ARCH_AARCH64_H
+#define _URCU_ARCH_AARCH64_H
+
+/*
+ * arch/aarch64.h: definitions for aarch64 architecture
+ *
+ * Copyright (c) 2010 Paul E. McKenney, IBM Corporation.
+ * Copyright (c) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <urcu/compiler.h>
+#include <urcu/config.h>
+#include <urcu/syscall-compat.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <sys/time.h>
+
+typedef unsigned long long cycles_t;
+
+static inline cycles_t caa_get_cycles (void)
+{
+       cycles_t thetime;
+       struct timeval tv;
+
+       if (gettimeofday(&tv, NULL) != 0)
+               return 0;
+       thetime = ((cycles_t)tv.tv_sec) * 1000000ULL + ((cycles_t)tv.tv_usec);
+       return (cycles_t)thetime;
+}
+
+/*
+ * Define the membarrier system call number if not yet available in the
+ * system headers. aarch64 implements asm-generic/unistd.h system call
+ * numbers.
+ */
+#ifndef __NR_membarrier
+#define __NR_membarrier                283
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#include <urcu/arch/generic.h>
+
+#endif /* _URCU_ARCH_AARCH64_H */