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Annotation of embedaddon/ntp/kernel/sys/i8253.h, revision 1.1

1.1     ! misho       1: /* Copyright (c) 1995 Vixie Enterprises
        !             2:  *
        !             3:  * Permission to use, copy, modify, and distribute this software for any
        !             4:  * purpose with or without fee is hereby granted, provided that the above
        !             5:  * copyright notice and this permission notice appear in all copies, and that
        !             6:  * the name of Vixie Enterprises not be used in advertising or publicity
        !             7:  * pertaining to distribution of the document or software without specific,
        !             8:  * written prior permission.
        !             9:  * 
        !            10:  * THE SOFTWARE IS PROVIDED "AS IS" AND VIXIE ENTERPRISES DISCLAIMS ALL
        !            11:  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
        !            12:  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL VIXIE ENTERPRISES
        !            13:  * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
        !            14:  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            15:  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            16:  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            17:  * SOFTWARE.
        !            18:  */
        !            19: 
        !            20: #ifndef _I8253_DEFINED
        !            21: #define _I8253_DEFINED
        !            22: 
        !            23: typedef union {
        !            24:        unsigned char   i;
        !            25:        struct {
        !            26:                unsigned int    bcd     : 1;
        !            27: #define                                i8253_binary    0
        !            28: #define                                i8253_bcd       1
        !            29:                unsigned int    mode    : 3;
        !            30: #define                                i8253_termcnt   0
        !            31: #define                                i8253_oneshot   1
        !            32: #define                                i8253_rategen   2
        !            33: #define                                i8253_sqrwave   3
        !            34: #define                                i8253_softstb   4
        !            35: #define                                i8253_hardstb   5
        !            36:                unsigned int    rl      : 2;
        !            37: #define                                i8253_latch     0
        !            38: #define                                i8253_lsb       1
        !            39: #define                                i8253_msb       2
        !            40: #define                                i8253_lmb       3
        !            41:                unsigned int    cntr    : 2;
        !            42: #define                                i8253_cntr_0    0
        !            43: #define                                i8253_cntr_1    1
        !            44: #define                                i8253_cntr_2    2
        !            45:        } s;
        !            46: } i8253_ctrl;
        !            47: 
        !            48: #endif /*_I8253_DEFINED*/