1*4a5d661aSToomas Soome /*-
2*4a5d661aSToomas Soome * Copyright (C) 1995-1997, 1999 Wolfgang Solfrank.
3*4a5d661aSToomas Soome * Copyright (C) 1995-1997, 1999 TooLs GmbH.
4*4a5d661aSToomas Soome * All rights reserved.
5*4a5d661aSToomas Soome *
6*4a5d661aSToomas Soome * Redistribution and use in source and binary forms, with or without
7*4a5d661aSToomas Soome * modification, are permitted provided that the following conditions
8*4a5d661aSToomas Soome * are met:
9*4a5d661aSToomas Soome * 1. Redistributions of source code must retain the above copyright
10*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer.
11*4a5d661aSToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
12*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer in the
13*4a5d661aSToomas Soome * documentation and/or other materials provided with the distribution.
14*4a5d661aSToomas Soome * 3. All advertising materials mentioning features or use of this software
15*4a5d661aSToomas Soome * must display the following acknowledgement:
16*4a5d661aSToomas Soome * This product includes software developed by TooLs GmbH.
17*4a5d661aSToomas Soome * 4. The name of TooLs GmbH may not be used to endorse or promote products
18*4a5d661aSToomas Soome * derived from this software without specific prior written permission.
19*4a5d661aSToomas Soome *
20*4a5d661aSToomas Soome * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21*4a5d661aSToomas Soome * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22*4a5d661aSToomas Soome * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23*4a5d661aSToomas Soome * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24*4a5d661aSToomas Soome * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25*4a5d661aSToomas Soome * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26*4a5d661aSToomas Soome * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27*4a5d661aSToomas Soome * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28*4a5d661aSToomas Soome * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29*4a5d661aSToomas Soome * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30*4a5d661aSToomas Soome *
31*4a5d661aSToomas Soome * $NetBSD: syncicache.c,v 1.2 1999/05/05 12:36:40 tsubai Exp $
32*4a5d661aSToomas Soome */
33*4a5d661aSToomas Soome
34*4a5d661aSToomas Soome #ifndef lint
35*4a5d661aSToomas Soome static const char rcsid[] =
36*4a5d661aSToomas Soome "$FreeBSD$";
37*4a5d661aSToomas Soome #endif /* not lint */
38*4a5d661aSToomas Soome
39*4a5d661aSToomas Soome #include <sys/param.h>
40*4a5d661aSToomas Soome #if defined(_KERNEL) || defined(_STANDALONE)
41*4a5d661aSToomas Soome #include <sys/time.h>
42*4a5d661aSToomas Soome #include <sys/proc.h>
43*4a5d661aSToomas Soome #include <vm/vm.h>
44*4a5d661aSToomas Soome #endif
45*4a5d661aSToomas Soome #include <sys/sysctl.h>
46*4a5d661aSToomas Soome
47*4a5d661aSToomas Soome #include <machine/cpu.h>
48*4a5d661aSToomas Soome #include <machine/md_var.h>
49*4a5d661aSToomas Soome
50*4a5d661aSToomas Soome #ifdef _STANDALONE
51*4a5d661aSToomas Soome int cacheline_size = 32;
52*4a5d661aSToomas Soome #endif
53*4a5d661aSToomas Soome
54*4a5d661aSToomas Soome #if !defined(_KERNEL) && !defined(_STANDALONE)
55*4a5d661aSToomas Soome #include <stdlib.h>
56*4a5d661aSToomas Soome
57*4a5d661aSToomas Soome int cacheline_size = 0;
58*4a5d661aSToomas Soome
59*4a5d661aSToomas Soome static void getcachelinesize(void);
60*4a5d661aSToomas Soome
61*4a5d661aSToomas Soome static void
getcachelinesize()62*4a5d661aSToomas Soome getcachelinesize()
63*4a5d661aSToomas Soome {
64*4a5d661aSToomas Soome static int cachemib[] = { CTL_MACHDEP, CPU_CACHELINE };
65*4a5d661aSToomas Soome int clen;
66*4a5d661aSToomas Soome
67*4a5d661aSToomas Soome clen = sizeof(cacheline_size);
68*4a5d661aSToomas Soome
69*4a5d661aSToomas Soome if (sysctl(cachemib, sizeof(cachemib) / sizeof(cachemib[0]),
70*4a5d661aSToomas Soome &cacheline_size, &clen, NULL, 0) < 0 || !cacheline_size) {
71*4a5d661aSToomas Soome abort();
72*4a5d661aSToomas Soome }
73*4a5d661aSToomas Soome }
74*4a5d661aSToomas Soome #endif
75*4a5d661aSToomas Soome
76*4a5d661aSToomas Soome void
__syncicache(void * from,int len)77*4a5d661aSToomas Soome __syncicache(void *from, int len)
78*4a5d661aSToomas Soome {
79*4a5d661aSToomas Soome int l, off;
80*4a5d661aSToomas Soome char *p;
81*4a5d661aSToomas Soome
82*4a5d661aSToomas Soome #if !defined(_KERNEL) && !defined(_STANDALONE)
83*4a5d661aSToomas Soome if (!cacheline_size)
84*4a5d661aSToomas Soome getcachelinesize();
85*4a5d661aSToomas Soome #endif
86*4a5d661aSToomas Soome
87*4a5d661aSToomas Soome off = (u_int)from & (cacheline_size - 1);
88*4a5d661aSToomas Soome l = len += off;
89*4a5d661aSToomas Soome p = (char *)from - off;
90*4a5d661aSToomas Soome
91*4a5d661aSToomas Soome do {
92*4a5d661aSToomas Soome __asm __volatile ("dcbst 0,%0" :: "r"(p));
93*4a5d661aSToomas Soome p += cacheline_size;
94*4a5d661aSToomas Soome } while ((l -= cacheline_size) > 0);
95*4a5d661aSToomas Soome __asm __volatile ("sync");
96*4a5d661aSToomas Soome p = (char *)from - off;
97*4a5d661aSToomas Soome do {
98*4a5d661aSToomas Soome __asm __volatile ("icbi 0,%0" :: "r"(p));
99*4a5d661aSToomas Soome p += cacheline_size;
100*4a5d661aSToomas Soome } while ((len -= cacheline_size) > 0);
101*4a5d661aSToomas Soome __asm __volatile ("sync; isync");
102*4a5d661aSToomas Soome }
103*4a5d661aSToomas Soome
104