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 #if 0
  42 #pragma mark **** cpu count ****
  43 #endif
  44
  45 __private_extern__ int
  46 chudxnu_logical_cpu_count(void)
  47 {
  48         return machine_info.logical_cpu_max;
  49 }
  50
  51 __private_extern__ int
  52 chudxnu_phys_cpu_count(void)
  53 {
  54     host_basic_info_data_t hinfo;
  55     kern_return_t kr;
  56     mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
  57
  58     kr = host_info(host_self(), HOST_BASIC_INFO, (integer_t *)&hinfo, &count);
  59     if(kr == KERN_SUCCESS) {
  60         return hinfo.max_cpus;
  61     } else {
  62         return 1;  // fall back to 1, 0 doesn't make sense at all
  63     }
  64 }
  65
  66 __private_extern__ int
  67 chudxnu_cpu_number(void)
  68 {
  69     return cpu_number();
  70 }
  71
  72 #if 0
  73 #pragma mark **** interrupts enable/disable ****
  74 #endif
  75
  76 __private_extern__ boolean_t
  77 chudxnu_set_interrupts_enabled(boolean_t enable)
  78 {
  79     return ml_set_interrupts_enabled(enable);
  80 }
  81
  82 __private_extern__ void
  83 chudxnu_cause_interrupt(void)
  84 {
  85     ml_cause_interrupt();
  86 }
  87
  88 #if 0
  89 #pragma mark **** preemption enable/disable ****
  90 #endif
  91
  92 __private_extern__ void
  93 chudxnu_enable_preemption(void)
  94 {
  95         enable_preemption();
  96 }
  97
  98 __private_extern__ void
  99 chudxnu_disable_preemption(void)
 100 {
 101         disable_preemption();
 102 }
 103
 104 __private_extern__ int
 105 chudxnu_get_preemption_level(void)
 106 {
 107         return get_preemption_level();
 108 }
 109