Annotation of sys/arch/i386/i386/mtrr.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mtrr.c,v 1.10 2007/05/02 18:52:17 matthieu Exp $ */
2: /*-
3: * Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
4: * Copyright (c) 1999 Brian Fundakowski Feldman
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26: * SUCH DAMAGE.
27: *
28: */
29:
30: #include <sys/param.h>
31: #include <sys/memrange.h>
32: #include <sys/systm.h>
33:
34: #include <machine/specialreg.h>
35:
36: extern struct mem_range_ops i686_mrops;
37: extern struct mem_range_ops k6_mrops;
38:
39: void mtrrattach(int);
40:
41: void
42: mtrrattach(int num)
43: {
44: int family, model, step;
45:
46: if (num > 1)
47: return;
48:
49: family = (cpu_id >> 8) & 0xf;
50: model = (cpu_id >> 4) & 0xf;
51: step = (cpu_id >> 0) & 0xf;
52:
53: if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
54: family == 0x5 &&
55: (model > 0x8 ||
56: (model == 0x8 &&
57: step > 0x7))) {
58: mem_range_softc.mr_op = &k6_mrops;
59:
60: /* Try for i686 MTRRs */
61: } else if ((cpu_feature & CPUID_MTRR) &&
62: (family == 0x6 || family == 0xf) &&
63: ((strcmp(cpu_vendor, "GenuineIntel") == 0) ||
64: (strcmp(cpu_vendor, "AuthenticAMD") == 0))) {
65: mem_range_softc.mr_op = &i686_mrops;
66:
67: }
68: /* Initialise memory range handling */
69: if (mem_range_softc.mr_op != NULL)
70: mem_range_softc.mr_op->init(&mem_range_softc);
71: }
72:
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