osfmk/ppc/clock.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  *
  28  */
  29
  30 #ifndef _PPC_CLOCK_H_
  31 #define _PPC_CLOCK_H_
  32
  33 #include <machine/mach_param.h>
  34
  35 #define CLK_SPEED       0.0000012766    /* time to complete a clock (3 MHz) */
  36
  37 #if HZ == 120
  38 #  define CLK_INTERVAL  6528    /* clocks to hit CLK_TCK ticks per sec */
  39 #elif HZ == 100
  40 #  define CLK_INTERVAL  7833    /* clocks to hit CLK_TCK ticks per sec */
  41 #elif HZ == 60
  42 #  define CLK_INTERVAL  13055   /* clocks to hit CLK_TCK ticks per sec */
  43 #else
  44 #error "unknown clock speed"
  45 #endif
  46                         /* 6528 for 119.998 Hz. */
  47                         /* 7833 for 100.004 Hz */
  48                         /* 13055 for 60.002 Hz. */
  49 #define CLK_INTH        (CLK_INTERVAL >> 8)
  50 #define CLK_INTL        (CLK_INTERVAL & 0xff)
  51
  52 #define SECDAY  ((unsigned)(24*60*60))
  53 #define SECYR   ((unsigned)(365*SECDAY + SECDAY/4))
  54
  55 #endif /* _PPC_CLOCK_H_ */