FreeBSD/Linux Kernel Cross Reference
sys/dev/dcons/dcons.h

     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (C) 2002-2004
      *      Hidetoshi Shimokawa. All rights reserved.
      * 
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *
     *      This product includes software developed by Hidetoshi Shimokawa.
     *
     * 4. Neither the name of the author nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     * 
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     * 
     * $Id: dcons.h,v 1.15 2003/10/23 15:05:31 simokawa Exp $
     * $FreeBSD$
     */
    
    #if defined(_KERNEL) || defined(_BOOT)
    #define V volatile
    #else
    #define V
    #endif
    
    #define DCONS_NPORT     2
    #define DCONS_CON       0
    #define DCONS_GDB       1
    
    struct dcons_buf {
    #define DCONS_VERSION 2
            V u_int32_t version;
            V u_int32_t ooffset[DCONS_NPORT];
            V u_int32_t ioffset[DCONS_NPORT];
            V u_int32_t osize[DCONS_NPORT];
            V u_int32_t isize[DCONS_NPORT];
    #define DCONS_MAGIC 0x64636f6e  /* "dcon" */
            V u_int32_t magic;
    #define DCONS_GEN_SHIFT         (24)
    #define DCONS_GEN_MASK          (0xff)
    #define DCONS_POS_MASK  ((1<< DCONS_GEN_SHIFT) - 1)
            V u_int32_t optr[DCONS_NPORT];
            V u_int32_t iptr[DCONS_NPORT];
            V char buf[0];
    };
    
    #define DCONS_CSR_VAL_VER       0x64636f /* "dco" */
    #define DCONS_CSR_KEY_HI        0x3a
    #define DCONS_CSR_KEY_LO        0x3b
    #define DCONS_CSR_KEY_RESET_HI  0x3c
    #define DCONS_CSR_KEY_RESET_LO  0x3d
    
    #define DCONS_HEADER_SIZE sizeof(struct dcons_buf)
    #define DCONS_MAKE_PTR(x)       htonl(((x)->gen << DCONS_GEN_SHIFT) | (x)->pos)
    #define DCONS_NEXT_GEN(x)       (((x) + 1) & DCONS_GEN_MASK)
    
    struct dcons_ch {
            u_int32_t size;
            u_int32_t gen;
            u_int32_t pos;
    #if defined(_KERNEL) || defined(_BOOT)
            V u_int32_t *ptr;
            V char *buf;
    #else
            off_t buf;
    #endif
    };
    
    #define KEY_CTRLB       2       /* ^B */
    #define KEY_CR          13      /* CR '\r' */
    #define KEY_TILDE       126     /* ~ */
    #define STATE0          0
    #define STATE1          1
    #define STATE2          2
    #define STATE3          3
    
    #if defined(_KERNEL) || defined(_BOOT)
    struct dcons_softc {
            struct dcons_ch o, i;
           int brk_state;
   #define DC_GDB  1
           int flags;
           void *tty;
   };
   
   int     dcons_checkc(struct dcons_softc *);
   int     dcons_ischar(struct dcons_softc *);
   void    dcons_putc(struct dcons_softc *, int);
   int     dcons_load_buffer(struct dcons_buf *, int, struct dcons_softc *);
   void    dcons_init(struct dcons_buf *, int, struct dcons_softc *);
   #endif

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