BSD 4_4 release

[unix-history] / usr / src / sys / luna68k / stand / conf.c

/*
* Copyright (c) 1992 OMRON Corporation.
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* 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 the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University 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.
*
*      @(#)conf.c      8.1 (Berkeley) 6/10/93
*/

#include <luna68k/stand/saio.h>

devread(io)
       register struct iob *io;
{
       int cc;

       io->i_flgs |= F_RDDATA;
       io->i_error = 0;
       cc = (*devsw[io->i_dev].dv_strategy)(io, READ);
       io->i_flgs &= ~F_TYPEMASK;
       return (cc);
}

devwrite(io)
       register struct iob *io;
{
       int cc;

       io->i_flgs |= F_WRDATA;
       io->i_error = 0;
       cc = (*devsw[io->i_dev].dv_strategy)(io, WRITE);
       io->i_flgs &= ~F_TYPEMASK;
       return (cc);
}

devopen(io)
       register struct iob *io;
{

       (*devsw[io->i_dev].dv_open)(io);
}

devclose(io)
       register struct iob *io;
{

       (*devsw[io->i_dev].dv_close)(io);
}

devioctl(io, cmd, arg)
       register struct iob *io;
       int cmd;
       caddr_t arg;
{

       return ((*devsw[io->i_dev].dv_ioctl)(io, cmd, arg));
}

/*ARGSUSED*/
nullsys(io)
       struct iob *io;
{

       ;
}

/*ARGSUSED*/
nullioctl(io, cmd, arg)
       struct iob *io;
       int cmd;
       caddr_t arg;
{

       return (ECMD);
}

int     nullsys(), nullioctl();
int     sdstrategy(), sdopen(), sdioctl();

struct devsw devsw[] = {
       { "sd", sdstrategy,     sdopen,         nullsys,        nullioctl },
       { 0, 0, 0, 0, 0 },
};

dev_t
make_device(str)
       char *str;
{
       char *cp;
       struct devsw *dp;
       int major, unit, part;

       /*
        * parse path strings
        */
                                                       /* find end of dev type name */
       for (cp = str; *cp && *cp != '('; cp++)
                       ;
       if (*cp != '(') {
               return (-1);
       }
                                                       /* compare dev type name */
       *cp = '\0';
       for (dp = devsw; dp->dv_name; dp++)
               if (!strcmp(str, dp->dv_name))
                       break;
       *cp++ = '(';
       if (dp->dv_name == NULL) {
               return (-1);
       }
       major = dp - devsw;
                                                       /* get unit number */
       unit = *cp++ - '0';
       if (*cp >= '0' && *cp <= '9')
               unit = unit * 10 + *cp++ - '0';
       if (unit < 0 || unit > 63) {
               return (-1);
       }
                                                       /* get partition offset */
       if (*cp++ != ',') {
               return (-1);
       }
       part = *cp - '0';
                                                       /* check out end of dev spec */
       for (;;) {
               if (*cp == ')')
                       break;
               if (*cp++)
                       continue;
               return (-1);
       }

       return(major << 8 | unit << 3 | part);
}