/* $OpenBSD: mtrr.c,v 1.5 2024/04/03 02:01:21 guenther Exp $ */ /*- * Copyright (c) 1999 Michael Smith * 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 #include #include #include extern struct mem_range_ops mrops; void mem_range_attach(void) { struct cpu_info *ci = &cpu_info_primary; int family, model, step; family = (cpu_id >> 8) & 0xf; model = (cpu_id >> 4) & 0xf; step = (cpu_id >> 0) & 0xf; /* Try for i686 MTRRs */ if ((ci->ci_vendor == CPUV_AMD || ci->ci_vendor == CPUV_INTEL || ci->ci_vendor == CPUV_VIA) && (family == 0x6 || family == 0xf) && cpu_feature & CPUID_MTRR) { mem_range_softc.mr_op = &mrops; } /* Initialise memory range handling */ if (mem_range_softc.mr_op != NULL) mem_range_softc.mr_op->init(&mem_range_softc); }