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/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (C) 1995-1997, 1999 Wolfgang Solfrank.
* Copyright (C) 1995-1997, 1999 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $NetBSD: syncicache.c,v 1.2 1999/05/05 12:36:40 tsubai Exp $
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#if defined(_KERNEL) || defined(_STANDALONE)
#include <sys/time.h>
#include <sys/proc.h>
#include <vm/vm.h>
#endif
#include <sys/sysctl.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#ifdef _STANDALONE
int cacheline_size = 32;
#endif
#if !defined(_KERNEL) && !defined(_STANDALONE)
#include <stdlib.h>
int cacheline_size = 0;
static void getcachelinesize(void);
static void
getcachelinesize()
{
static int cachemib[] = { CTL_MACHDEP, CPU_CACHELINE };
int clen;
clen = sizeof(cacheline_size);
if (sysctl(cachemib, nitems(cachemib), &cacheline_size, &clen,
NULL, 0) < 0 || !cacheline_size) {
abort();
}
}
#endif
void
__syncicache(void *from, int len)
{
int l, off;
char *p;
#if !defined(_KERNEL) && !defined(_STANDALONE)
if (!cacheline_size)
getcachelinesize();
#endif
off = (u_int)from & (cacheline_size - 1);
l = len += off;
p = (char *)from - off;
do {
__asm __volatile ("dcbst 0,%0" :: "r"(p));
p += cacheline_size;
} while ((l -= cacheline_size) > 0);
__asm __volatile ("sync");
p = (char *)from - off;
do {
__asm __volatile ("icbi 0,%0" :: "r"(p));
p += cacheline_size;
} while ((len -= cacheline_size) > 0);
__asm __volatile ("sync; isync");
}
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