The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/cpu_number.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        cpu_number.h,v $
   29  * Revision 2.4  93/01/14  17:33:48  danner
   30  *      ANSI C cleanups.
   31  *      [92/12/10  18:01:47  af]
   32  * 
   33  * Revision 2.3  91/05/14  16:40:40  mrt
   34  *      Correcting copyright
   35  * 
   36  * Revision 2.2  91/02/05  17:25:48  mrt
   37  *      Changed to new Mach copyright
   38  *      [91/02/01  16:11:32  mrt]
   39  * 
   40  * Revision 2.1  89/08/03  15:45:22  rwd
   41  * Created.
   42  * 
   43  *  8-Aug-88  David Golub (dbg) at Carnegie-Mellon University
   44  *      Created.
   45  *
   46  */
   47 
   48 #ifndef _KERN_CPU_NUMBER_H_
   49 #define _KERN_CPU_NUMBER_H_
   50 
   51 #include <cpus.h>
   52 
   53 /*
   54  *      Definitions for cpu identification in multi-processors.
   55  */
   56 
   57 int     master_cpu;     /* 'master' processor - keeps time */
   58 
   59 #if     (NCPUS == 1)
   60         /* cpu number is always 0 on a single processor system */
   61 #define cpu_number()    (0)
   62 
   63 #else   /* NCPUS == 1 */
   64         /* get cpu_number definition from machine-dependent code */
   65 #include <machine/cpu_number.h>
   66 
   67 #endif  /* NCPUS == 1 */
   68 #endif /* _KERN_CPU_NUMBER_H_ */

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