1 files changed, 56 insertions, 0 deletions
diff --git a/src/intel/common/gen_clflush.h b/src/intel/common/gen_clflush.h
new file mode 100644
index 00000000000..9b971cac37e
--- /dev/null
+++ b/src/intel/common/gen_clflush.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * 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 (including the next
+ * paragraph) 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 GEN_CLFLUSH_H
+#define GEN_CLFLUSH_H
+
+#define CACHELINE_SIZE 64
+#define CACHELINE_MASK 63
+
+static inline void
+gen_clflush_range(void *start, size_t size)
+{
+   void *p = (void *) (((uintptr_t) start) & ~CACHELINE_MASK);
+   void *end = start + size;
+
+   while (p < end) {
+      __builtin_ia32_clflush(p);
+      p += CACHELINE_SIZE;
+   }
+}
+
+static inline void
+gen_flush_range(void *start, size_t size)
+{
+   __builtin_ia32_mfence();
+   gen_clflush_range(start, size);
+}
+
+static inline void
+gen_invalidate_range(void *start, size_t size)
+{
+   gen_clflush_range(start, size);
+   __builtin_ia32_mfence();
+}
+
+#endif