1 files changed, 44 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/posix/barrier.h b/drivers/gpu/nvgpu/include/nvgpu/posix/barrier.h
new file mode 100644
index 00000000..edc7b129
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/posix/barrier.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __NVGPU_POSIX_BARRIER_H__
+#define __NVGPU_POSIX_BARRIER_H__
+
+#define ACCESS_ONCE(x)  (*(volatile __typeof__(x) *)&x)
+
+/*
+ * TODO: implement all these!
+ */
+#define __nvgpu_mb()
+#define __nvgpu_rmb()
+#define __nvgpu_wmb()
+
+#define __nvgpu_smp_mb()
+#define __nvgpu_smp_rmb()
+#define __nvgpu_smp_wmb()
+
+#define __nvgpu_read_barrier_depends()
+#define __nvgpu_smp_read_barrier_depends()
+
+#define __NV_ACCESS_ONCE(x)     ACCESS_ONCE(x)
+
+#endif