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Annotation of XNU/osfmk/ppc/clock.h, revision 1.1

1.1     ! root        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_ */

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