1/*-
2 * Copyright (C) 1995-1997, 1999 Wolfgang Solfrank.
3 * Copyright (C) 1995-1997, 1999 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * $NetBSD: syncicache.c,v 1.2 1999/05/05 12:36:40 tsubai Exp $
32 */
33
34#ifndef lint
35static const char rcsid[] =
36  "$FreeBSD$";
37#endif /* not lint */
38
39#include <sys/param.h>
40#if	defined(_KERNEL) || defined(_STANDALONE)
41#include <sys/time.h>
42#include <sys/proc.h>
43#include <vm/vm.h>
44#endif
45#include <sys/sysctl.h>
46
47#include <machine/cpu.h>
48#include <machine/md_var.h>
49
50void
51__syncicache(void *from, int len)
52{
53	register_t l, off;
54	char	*p;
55
56	off = (uintptr_t)from & (cacheline_size - 1);
57	l = len += off;
58	p = (char *)from - off;
59
60	do {
61		__asm __volatile ("dcbst 0,%0" :: "r"(p));
62		p += cacheline_size;
63	} while ((l -= cacheline_size) > 0);
64	__asm __volatile ("sync");
65	p = (char *)from - off;
66	do {
67		__asm __volatile ("icbi 0,%0" :: "r"(p));
68		p += cacheline_size;
69	} while ((len -= cacheline_size) > 0);
70	__asm __volatile ("sync; isync");
71}
72
73