osfmk/chud/chud_cpu.c

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, 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 #include <mach/mach_types.h>
  29 #include <mach/mach_host.h>
  30
  31 #include <kern/host.h>
  32 #include <kern/processor.h>
  33 #include <kern/cpu_data.h>
  34
  35 #include <machine/machine_routines.h>
  36
  37 #include <chud/chud_xnu.h>
  38
  39 #pragma mark **** cpu count ****
  40
  41 __private_extern__ int
  42 chudxnu_avail_cpu_count(void)
  43 {
  44     host_basic_info_data_t hinfo;
  45     kern_return_t kr;
  46     mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
  47
  48     kr = host_info(host_self(), HOST_BASIC_INFO, (integer_t *)&hinfo, &count);
  49     if(kr == KERN_SUCCESS) {
  50         return hinfo.avail_cpus;
  51     } else {
  52         return 0;
  53     }
  54 }
  55
  56 __private_extern__ int
  57 chudxnu_phys_cpu_count(void)
  58 {
  59     host_basic_info_data_t hinfo;
  60     kern_return_t kr;
  61     mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
  62
  63     kr = host_info(host_self(), HOST_BASIC_INFO, (integer_t *)&hinfo, &count);
  64     if(kr == KERN_SUCCESS) {
  65         return hinfo.max_cpus;
  66     } else {
  67         return 0;
  68     }
  69 }
  70
  71 __private_extern__
  72 int chudxnu_cpu_number(void)
  73 {
  74     return cpu_number();
  75 }
  76
  77 #pragma mark **** branch trace buffer ****
  78
  79 extern int pc_trace_buf[1024];
  80
  81 __private_extern__ uint32_t *
  82 chudxnu_get_branch_trace_buffer(uint32_t *entries)
  83 {
  84     if(entries) {
  85         *entries = sizeof(pc_trace_buf)/sizeof(int);
  86     }
  87     return pc_trace_buf;
  88 }
  89
  90 #pragma mark **** interrupts enable/disable ****
  91
  92 __private_extern__ boolean_t
  93 chudxnu_get_interrupts_enabled(void)
  94 {
  95     return ml_get_interrupts_enabled();
  96 }
  97
  98 __private_extern__ boolean_t
  99 chudxnu_set_interrupts_enabled(boolean_t enable)
 100 {
 101     return ml_set_interrupts_enabled(enable);
 102 }
 103
 104 __private_extern__ boolean_t
 105 chudxnu_at_interrupt_context(void)
 106 {
 107     return ml_at_interrupt_context();
 108 }
 109
 110 __private_extern__ void
 111 chudxnu_cause_interrupt(void)
 112 {
 113     ml_cause_interrupt();
 114 }
 115
 116 #pragma mark **** preemption enable/disable ****
 117
 118 __private_extern__ void
 119 chudxnu_enable_preemption(void)
 120 {
 121         enable_preemption();
 122 }
 123
 124 __private_extern__ void
 125 chudxnu_disable_preemption(void)
 126 {
 127         disable_preemption();
 128 }
 129
 130 __private_extern__ int
 131 chudxnu_get_preemption_level(void)
 132 {
 133         return get_preemption_level();
 134 }