xnu-1228.0.2.tar.gz
[apple/xnu.git] / osfmk / chud / chud_cpu.c
1 /*
2 * Copyright (c) 2003-2007 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29
30 #include <mach/mach_types.h>
31 #include <mach/mach_host.h>
32
33 #include <kern/host.h>
34 #include <kern/processor.h>
35 #include <kern/cpu_data.h>
36 #include <kern/machine.h>
37 #include <machine/machine_routines.h>
38
39 #include <chud/chud_xnu.h>
40
41 #pragma mark **** cpu count ****
42
43 __private_extern__ int
44 chudxnu_logical_cpu_count(void)
45 {
46 return machine_info.logical_cpu_max;
47 }
48
49 __private_extern__ int
50 chudxnu_phys_cpu_count(void)
51 {
52 host_basic_info_data_t hinfo;
53 kern_return_t kr;
54 mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
55
56 kr = host_info(host_self(), HOST_BASIC_INFO, (integer_t *)&hinfo, &count);
57 if(kr == KERN_SUCCESS) {
58 return hinfo.max_cpus;
59 } else {
60 return 1; // fall back to 1, 0 doesn't make sense at all
61 }
62 }
63
64 __private_extern__ int
65 chudxnu_cpu_number(void)
66 {
67 return cpu_number();
68 }
69
70 #pragma mark **** interrupts enable/disable ****
71
72 __private_extern__ boolean_t
73 chudxnu_get_interrupts_enabled(void)
74 {
75 return ml_get_interrupts_enabled();
76 }
77
78 __private_extern__ boolean_t
79 chudxnu_set_interrupts_enabled(boolean_t enable)
80 {
81 return ml_set_interrupts_enabled(enable);
82 }
83
84 __private_extern__ boolean_t
85 chudxnu_at_interrupt_context(void)
86 {
87 return ml_at_interrupt_context();
88 }
89
90 __private_extern__ void
91 chudxnu_cause_interrupt(void)
92 {
93 ml_cause_interrupt();
94 }
95
96 #pragma mark **** preemption enable/disable ****
97
98 __private_extern__ void
99 chudxnu_enable_preemption(void)
100 {
101 enable_preemption();
102 }
103
104 __private_extern__ void
105 chudxnu_disable_preemption(void)
106 {
107 disable_preemption();
108 }
109
110 __private_extern__ int
111 chudxnu_get_preemption_level(void)
112 {
113 return get_preemption_level();
114 }
115
116 #pragma mark *** deprecated ***
117
118 //DEPRECATED
119 __private_extern__ int
120 chudxnu_avail_cpu_count(void)
121 {
122 return machine_info.logical_cpu;
123 }
124