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      1  1.6  riastrad /*	$NetBSD: processor.h,v 1.6 2021/12/19 01:46:08 riastradh Exp $	*/
      2  1.2  riastrad 
      3  1.2  riastrad /*-
      4  1.2  riastrad  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  1.2  riastrad  * All rights reserved.
      6  1.2  riastrad  *
      7  1.2  riastrad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2  riastrad  * by Taylor R. Campbell.
      9  1.2  riastrad  *
     10  1.2  riastrad  * Redistribution and use in source and binary forms, with or without
     11  1.2  riastrad  * modification, are permitted provided that the following conditions
     12  1.2  riastrad  * are met:
     13  1.2  riastrad  * 1. Redistributions of source code must retain the above copyright
     14  1.2  riastrad  *    notice, this list of conditions and the following disclaimer.
     15  1.2  riastrad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2  riastrad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2  riastrad  *    documentation and/or other materials provided with the distribution.
     18  1.2  riastrad  *
     19  1.2  riastrad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2  riastrad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2  riastrad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2  riastrad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2  riastrad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2  riastrad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2  riastrad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2  riastrad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2  riastrad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2  riastrad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2  riastrad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2  riastrad  */
     31  1.2  riastrad 
     32  1.2  riastrad #ifndef _ASM_PROCESSOR_H_
     33  1.3  riastrad #define _ASM_PROCESSOR_H_
     34  1.2  riastrad 
     35  1.4  riastrad #include <sys/param.h>
     36  1.2  riastrad 
     37  1.6  riastrad #include <sys/lock.h>
     38  1.6  riastrad 
     39  1.6  riastrad #define	cpu_relax()	SPINLOCK_BACKOFF_HOOK
     40  1.2  riastrad 
     41  1.5  riastrad #if defined(__i386__) || defined(__x86_64__)
     42  1.5  riastrad static inline void
     43  1.5  riastrad clflushopt(void *p)
     44  1.5  riastrad {
     45  1.5  riastrad 	/* XXX Test CPUID bit, use CLFLUSHOPT...  */
     46  1.5  riastrad 	asm volatile ("clflush %0" : : "m" (*(const char *)p));
     47  1.5  riastrad }
     48  1.5  riastrad #endif
     49  1.5  riastrad 
     50  1.2  riastrad #endif  /* _ASM_PROCESSOR_H_ */
     51