/* $OpenBSD: mtrr.c,v 1.10 2007/05/02 18:52:17 matthieu Exp $ */
/*-
* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
* Copyright (c) 1999 Brian Fundakowski Feldman
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
*
*/
#include <sys/param.h>
#include <sys/memrange.h>
#include <sys/systm.h>
#include <machine/specialreg.h>
extern struct mem_range_ops i686_mrops;
extern struct mem_range_ops k6_mrops;
void mtrrattach(int);
void
mtrrattach(int num)
{
int family, model, step;
if (num > 1)
return;
family = (cpu_id >> 8) & 0xf;
model = (cpu_id >> 4) & 0xf;
step = (cpu_id >> 0) & 0xf;
if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
family == 0x5 &&
(model > 0x8 ||
(model == 0x8 &&
step > 0x7))) {
mem_range_softc.mr_op = &k6_mrops;
/* Try for i686 MTRRs */
} else if ((cpu_feature & CPUID_MTRR) &&
(family == 0x6 || family == 0xf) &&
((strcmp(cpu_vendor, "GenuineIntel") == 0) ||
(strcmp(cpu_vendor, "AuthenticAMD") == 0))) {
mem_range_softc.mr_op = &i686_mrops;
}
/* Initialise memory range handling */
if (mem_range_softc.mr_op != NULL)
mem_range_softc.mr_op->init(&mem_range_softc);
}