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/dev/ic/ns16450reg.h

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    1 /*      $OpenBSD: ns16450reg.h,v 1.3 2003/06/02 23:28:02 millert Exp $  */
    2 /*      $NetBSD: ns16450reg.h,v 1.3 1994/10/27 04:18:42 cgd Exp $       */
    3 
    4 /*-
    5  * Copyright (c) 1991 The Regents of the University of California.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)ns16450.h   7.1 (Berkeley) 5/9/91
   33  */
   34 
   35 /*
   36  * NS16450 UART registers
   37  */
   38 
   39 #define com_data        0       /* data register (R/W) */
   40 #define com_dlbl        0       /* divisor latch low (W) */
   41 #define com_dlbh        1       /* divisor latch high (W) */
   42 #define com_ier         1       /* interrupt enable (W) */
   43 #define com_iir         2       /* interrupt identification (R) */
   44 #define com_lctl        3       /* line control register (R/W) */
   45 #define  com_cfcr       3       /* line control register (R/W) */
   46 #define com_mcr         4       /* modem control register (R/W) */
   47 #define com_lsr         5       /* line status register (R/W) */
   48 #define com_msr         6       /* modem status register (R/W) */

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