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viewvar.h revision 1.3 
      1 /*	$NetBSD: viewvar.h,v 1.3 1996/04/18 08:52:12 leo Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Christian E. Hopps
      5  * 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  *      This product includes software developed by Christian E. Hopps.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /* The view major device is a placeholder device.  It serves
     34  * simply to map the semantics of a graphics dipslay to
     35  * the semantics of a character block device.  In other
     36  * words the graphics system as currently built does not like to be
     37  * refered to by open/close/ioctl.  This device serves as
     38  * a interface to graphics. */
     39 
     40 #define	NOPROC	((struct proc *)-1)	/* XXX */
     41 
     42 struct view_softc {
     43     struct  view_size size;
     44     view_t *view;
     45     pid_t   lock_process;
     46     int     flags;
     47 };
     48 
     49 enum view_unit_flag_bits {
     50     VUB_OPEN,
     51     VUB_ADDED,
     52     VUB_DISPLAY,
     53     VUB_LAST_BIT
     54 };
     55 
     56 enum view_unit_flags {
     57     VUF_OPEN    = 1<<VUB_OPEN,
     58     VUF_ADDED   = 1<<VUB_ADDED,
     59     VUF_DISPLAY = 1<<VUB_DISPLAY,
     60     VUF_MASK    = ((1<<VUB_LAST_BIT)-1)
     61 };
     62 
     63 #ifdef _KERNEL
     64 view_t	*viewview __P((dev_t));
     65 int	viewprobe __P((void));
     66 
     67 dev_type_close(viewclose);
     68 dev_type_ioctl(viewioctl);
     69 dev_type_open(viewopen);
     70 dev_type_mmap(viewmmap);
     71 dev_type_select(viewselect);
     72 
     73 #endif /* _KERNEL */
     74