modified for common sys.c

[unix-history] / usr / src / sys / i386 / stand / conf.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* %sccs.include.redist.c%
*
*      @(#)conf.c      7.2 (Berkeley) %G%
*/

#include "param.h"

#include "saio.h"
#ifdef BOOT
extern exception;
extern int debugflag;
#endif

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

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

#ifdef BOOT
if(/*io->i_error || */(c=scankbd()))
       _longjmp(&exception,1);
#endif
       return (cc);
}

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

       io->i_flgs |= F_WRDATA;
       io->i_error = 0;
       cc = (*devsw[io->i_dev].dv_strategy)(io, WRITE);
       io->i_flgs &= ~F_TYPEMASK;
#ifdef BOOT
if(/* io->i_error || */ (c=scankbd()))
       _longjmp(&exception,1);
#endif
       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     wdstrategy(), wdopen()/*, wdioctl()*/;
int     fdstrategy(), fdopen()/*, fdioctl()*/;

struct devsw devsw[] = {
       /*{ "xx",       xxstrategy,     xxopen,         nullsys, nullioctl },*/
       { "wd", wdstrategy,     wdopen,         nullsys,/*wdioctl*/ nullioctl },
       { "", 0, 0, 0, 0 }, /* swapdev place holder */
       { "fd", fdstrategy,     fdopen,         nullsys,/*fdioctl*/ nullioctl },
       { 0, 0, 0, 0, 0 },
};
int ndevs = 3 ;