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/dcons/dcons.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (C) 2002-2004
    5  *      Hidetoshi Shimokawa. All rights reserved.
    6  * 
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *
   18  *      This product includes software developed by Hidetoshi Shimokawa.
   19  *
   20  * 4. Neither the name of the author nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  * 
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  * 
   36  * $Id: dcons.h,v 1.15 2003/10/23 15:05:31 simokawa Exp $
   37  * $FreeBSD: releng/12.0/sys/dev/dcons/dcons.h 325966 2017-11-18 14:26:50Z pfg $
   38  */
   39 
   40 #if defined(_KERNEL) || defined(_BOOT)
   41 #define V volatile
   42 #else
   43 #define V
   44 #endif
   45 
   46 #define DCONS_NPORT     2
   47 #define DCONS_CON       0
   48 #define DCONS_GDB       1
   49 
   50 struct dcons_buf {
   51 #define DCONS_VERSION 2
   52         V u_int32_t version;
   53         V u_int32_t ooffset[DCONS_NPORT];
   54         V u_int32_t ioffset[DCONS_NPORT];
   55         V u_int32_t osize[DCONS_NPORT];
   56         V u_int32_t isize[DCONS_NPORT];
   57 #define DCONS_MAGIC 0x64636f6e  /* "dcon" */
   58         V u_int32_t magic;
   59 #define DCONS_GEN_SHIFT         (24)
   60 #define DCONS_GEN_MASK          (0xff)
   61 #define DCONS_POS_MASK  ((1<< DCONS_GEN_SHIFT) - 1)
   62         V u_int32_t optr[DCONS_NPORT];
   63         V u_int32_t iptr[DCONS_NPORT];
   64         V char buf[0];
   65 };
   66 
   67 #define DCONS_CSR_VAL_VER       0x64636f /* "dco" */
   68 #define DCONS_CSR_KEY_HI        0x3a
   69 #define DCONS_CSR_KEY_LO        0x3b
   70 #define DCONS_CSR_KEY_RESET_HI  0x3c
   71 #define DCONS_CSR_KEY_RESET_LO  0x3d
   72 
   73 #define DCONS_HEADER_SIZE sizeof(struct dcons_buf)
   74 #define DCONS_MAKE_PTR(x)       htonl(((x)->gen << DCONS_GEN_SHIFT) | (x)->pos)
   75 #define DCONS_NEXT_GEN(x)       (((x) + 1) & DCONS_GEN_MASK)
   76 
   77 struct dcons_ch {
   78         u_int32_t size;
   79         u_int32_t gen;
   80         u_int32_t pos;
   81 #if defined(_KERNEL) || defined(_BOOT)
   82         V u_int32_t *ptr;
   83         V char *buf;
   84 #else
   85         off_t buf;
   86 #endif
   87 };
   88 
   89 #define KEY_CTRLB       2       /* ^B */
   90 #define KEY_CR          13      /* CR '\r' */
   91 #define KEY_TILDE       126     /* ~ */
   92 #define STATE0          0
   93 #define STATE1          1
   94 #define STATE2          2
   95 #define STATE3          3
   96 
   97 #if defined(_KERNEL) || defined(_BOOT)
   98 struct dcons_softc {
   99         struct dcons_ch o, i;
  100         int brk_state;
  101 #define DC_GDB  1
  102         int flags;
  103         void *tty;
  104 };
  105 
  106 int     dcons_checkc(struct dcons_softc *);
  107 int     dcons_ischar(struct dcons_softc *);
  108 void    dcons_putc(struct dcons_softc *, int);
  109 int     dcons_load_buffer(struct dcons_buf *, int, struct dcons_softc *);
  110 void    dcons_init(struct dcons_buf *, int, struct dcons_softc *);
  111 #endif

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