1 /*-
2 * Copyright (c) 2011 The DragonFly Project. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 * 3. Neither the name of The DragonFly Project nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific, prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/sysctl.h>
37
38 #include <machine/cpufunc.h>
39 #include <machine/cputypes.h>
40 #include <machine/md_var.h>
41 #include <machine/specialreg.h>
42
43 #include "acpi.h"
44 #include "acpivar.h"
45 #include "acpi_cpu.h"
46
47 uint32_t
acpi_cpu_md_features(void)48 acpi_cpu_md_features(void)
49 {
50 uint32_t features = 0;
51
52 if (cpu_vendor_id == CPU_VENDOR_INTEL) {
53 if (cpu_feature2 & CPUID2_EST) {
54 features |= ACPI_PDC_PX_MSR |
55 ACPI_PDC_MP_PX_SWCOORD |
56 ACPI_PDC_PX_HWCOORD;
57 }
58 if ((cpu_feature2 & CPUID2_MON) &&
59 (cpu_mwait_feature &
60 (CPUID_MWAIT_EXT | CPUID_MWAIT_INTBRK)) ==
61 (CPUID_MWAIT_EXT | CPUID_MWAIT_INTBRK)) {
62 features |= ACPI_PDC_MP_C1_NATIVE |
63 ACPI_PDC_MP_C2C3_NATIVE;
64 }
65 }
66 return features;
67 }
68