xref: /dflybsd-src/sys/platform/pc64/acpica/acpi_cpu_machdep.c (revision 6645e30f706ad4e4768c4ccde89afa97bda79db2)

/*-
 * Copyright (c) 2011 The DragonFly Project.  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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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/bus.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/sysctl.h>

#include <machine/cpufunc.h>
#include <machine/cputypes.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>

#include "acpi.h"
#include "acpivar.h"
#include "acpi_cpu.h"

uint32_t
acpi_cpu_md_features(void)
{
	uint32_t features = 0;

	if (cpu_vendor_id == CPU_VENDOR_INTEL) {
		if (cpu_feature2 & CPUID2_EST) {
			features |= ACPI_PDC_PX_MSR |
			    ACPI_PDC_MP_PX_SWCOORD |
			    ACPI_PDC_PX_HWCOORD;
		}
		if ((cpu_feature2 & CPUID2_MON) &&
		    (cpu_mwait_feature &
		     (CPUID_MWAIT_EXT | CPUID_MWAIT_INTBRK)) ==
		    (CPUID_MWAIT_EXT | CPUID_MWAIT_INTBRK)) {
			features |= ACPI_PDC_MP_C1_NATIVE |
			    ACPI_PDC_MP_C2C3_NATIVE;
		}
	}
	return features;
}