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/*
* 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;
}
}
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