1/* 2 * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 23#ifndef LIBKERN_SYSCTL_H 24#define LIBKERN_SYSCTL_H 25 26#include <sys/cdefs.h> 27 28__BEGIN_DECLS 29 30#include <sys/types.h> 31 32/* 33 * These are the support HW selectors for sysctlbyname. Parameters that are byte counts or frequencies are 64 bit numbers. 34 * All other parameters are 32 bit numbers. 35 * 36 * hw.memsize - The number of bytes of physical memory in the system. 37 * 38 * hw.ncpu - The maximum number of processors that could be available this boot. 39 * Use this value for sizing of static per processor arrays; i.e. processor load statistics. 40 * 41 * hw.activecpu - The number of processors currently available for executing threads. 42 * Use this number to determine the number threads to create in SMP aware applications. 43 * This number can change when power management modes are changed. 44 * 45 * hw.physicalcpu - The number of physical processors available in the current power management mode. 46 * hw.physicalcpu_max - The maximum number of physical processors that could be available this boot 47 * 48 * hw.logicalcpu - The number of logical processors available in the current power management mode. 49 * hw.logicalcpu_max - The maximum number of logical processors that could be available this boot 50 * 51 * hw.tbfrequency - This gives the time base frequency used by the OS and is the basis of all timing services. 52 * In general is is better to use mach's or higher level timing services, but this value 53 * is needed to convert the PPC Time Base registers to real time. 54 * 55 * hw.cpufrequency - These values provide the current, min and max cpu frequency. The min and max are for 56 * hw.cpufrequency_max - all power management modes. The current frequency is the max frequency in the current mode. 57 * hw.cpufrequency_min - All frequencies are in Hz. 58 * 59 * hw.busfrequency - These values provide the current, min and max bus frequency. The min and max are for 60 * hw.busfrequency_max - all power management modes. The current frequency is the max frequency in the current mode. 61 * hw.busfrequency_min - All frequencies are in Hz. 62 * 63 * hw.cputype - These values provide the mach-o cpu type and subtype. A complete list is in <mach/machine.h> 64 * hw.cpusubtype - These values should be used to determine what processor family the running cpu is from so that 65 * the best binary can be chosen, or the best dynamic code generated. They should not be used 66 * to determine if a given processor feature is available. 67 * hw.cputhreadtype - This value will be present if the processor supports threads. Like hw.cpusubtype this selector 68 * should not be used to infer features, and only used to name the processors thread architecture. 69 * The values are defined in <mach/machine.h> 70 * 71 * hw.byteorder - Gives the byte order of the processor. 4321 for big endian, 1234 for little. 72 * 73 * hw.pagesize - Gives the size in bytes of the pages used by the processor and VM system. 74 * 75 * hw.cachelinesize - Gives the size in bytes of the processor's cache lines. 76 * This value should be use to control the strides of loops that use cache control instructions 77 * like dcbz, dcbt or dcbst. 78 * 79 * hw.l1dcachesize - These values provide the size in bytes of the L1, L2 and L3 caches. If a cache is not present 80 * hw.l1icachesize - then the selector will return and error. 81 * hw.l2cachesize - 82 * hw.l3cachesize - 83 * 84 * 85 * These are the selectors for optional processor features. Selectors that return errors are not support on the system. 86 * Supported features will return 1 if they are recommended or 0 if they are supported but are not expected to help performance. 87 * Future versions of these selectors may return larger values as necessary so it is best to test for non zero. 88 * 89 * hw.optional.floatingpoint - Floating Point Instructions 90 * hw.optional.altivec - AltiVec Instructions 91 * hw.optional.graphicsops - Graphics Operations 92 * hw.optional.64bitops - 64-bit Instructions 93 * hw.optional.fsqrt - HW Floating Point Square Root Instruction 94 * hw.optional.stfiwx - Store Floating Point as Integer Word Indexed Instructions 95 * hw.optional.dcba - Data Cache Block Allocate Instruction 96 * hw.optional.datastreams - Data Streams Instructions 97 * hw.optional.dcbtstreams - Data Cache Block Touch Steams Instruction Form 98 * 99 */ 100 101/* 102 * Sysctl handling 103 */ 104int sysctlbyname(const char *, void *, size_t *, void *, size_t); 105 106__END_DECLS 107 108#endif /* LIBKERN_SYSCTL_H */ 109