util/cache_ops: Add some cache flush helpers

The x86 implementation was shamelessly stolen from intel_mem.c and the
aarch64 implementaiton was based on the code in Turnip.

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Tested-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37803>

1 files changed, 46 insertions, 0 deletions

diff --git a/src/util/cache_ops_x86_clflushopt.c b/src/util/cache_ops_x86_clflushopt.c
new file mode 100644
index 00000000000..ca97b9000f6
--- /dev/null
+++ b/src/util/cache_ops_x86_clflushopt.c
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+
+#include "util/u_cpu_detect.h"
+
+#ifndef HAVE___BUILTIN_IA32_CLFLUSHOPT
+#error "Compiler doesn't support clflushopt!"
+#endif
+
+void util_clflushopt_range(void *start, size_t size);
+
+void
+util_clflushopt_range(void *start, size_t size)
+{
+   const struct util_cpu_caps_t *cpu_caps = util_get_cpu_caps();
+   assert(cpu_caps->has_clflushopt);
+   assert(cpu_caps->cacheline > 0);
+   void *p = (void *) (((uintptr_t) start) &
+                       ~((uintptr_t)cpu_caps->cacheline - 1));
+   void *end = start + size;
+
+   while (p < end) {
+      __builtin_ia32_clflushopt(p);
+      p += cpu_caps->cacheline;
+   }
+}