osfmk/ppc/clock.h

   1 /*
   2  * Copyright (c) 2000 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  * @OSF_COPYRIGHT@
  24  *
  25  */
  26
  27 #ifndef _PPC_CLOCK_H_
  28 #define _PPC_CLOCK_H_
  29
  30 #include <machine/mach_param.h>
  31
  32 #define CLK_SPEED       0.0000012766    /* time to complete a clock (3 MHz) */
  33
  34 #if HZ == 120
  35 #  define CLK_INTERVAL  6528    /* clocks to hit CLK_TCK ticks per sec */
  36 #elif HZ == 100
  37 #  define CLK_INTERVAL  7833    /* clocks to hit CLK_TCK ticks per sec */
  38 #elif HZ == 60
  39 #  define CLK_INTERVAL  13055   /* clocks to hit CLK_TCK ticks per sec */
  40 #else
  41 #error "unknown clock speed"
  42 #endif
  43                         /* 6528 for 119.998 Hz. */
  44                         /* 7833 for 100.004 Hz */
  45                         /* 13055 for 60.002 Hz. */
  46 #define CLK_INTH        (CLK_INTERVAL >> 8)
  47 #define CLK_INTL        (CLK_INTERVAL & 0xff)
  48
  49 #define SECDAY  ((unsigned)(24*60*60))
  50 #define SECYR   ((unsigned)(365*SECDAY + SECDAY/4))
  51
  52 #endif /* _PPC_CLOCK_H_ */