FreeBSD/Linux Kernel Cross Reference
sys/chips/screen_switch.c

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        screen_switch.c,v $
     * Revision 2.9  93/02/05  08:05:36  danner
     *      Add conditionals for pmax screen. Not available on a Flamingo
     *      [92/12/03            jeffreyh]
     *      Added sfb driver.
     *      [92/12/10            af]
     * 
     * Revision 2.8  92/03/02  18:33:09  rpd
     *      Added MAXine framebuffer.
     *      [92/03/02  02:03:13  af]
     * 
     * Revision 2.7  91/08/24  11:53:14  af
     *      Added new hires, monochrome screen driver "fb", dressed as a color one.
     *      [91/08/02  01:56:50  af]
     * 
     * Revision 2.6  91/06/19  11:54:24  rvb
     *      mips->DECSTATION; vax->VAXSTATION
     *      [91/06/12  14:02:13  rvb]
     * 
     *      File moved here from mips/PMAX since it tries to be generic;
     *      it is used on the PMAX and the Vax3100.
     *      [91/06/04            rvb]
     * 
     * Revision 2.5  91/05/14  17:27:41  mrt
     *      Correcting copyright
     * 
     * Revision 2.4  91/02/05  17:44:22  mrt
     *      Added author notices
     *      [91/02/04  11:17:47  mrt]
     * 
     *      Changed to use new Mach copyright
     *      [91/02/02  12:16:23  mrt]
     * 
     * Revision 2.3  90/12/05  23:34:24  af
     *      Do not use a single patchable switch, but a pointer
     *      to a per-device one.
     *      [90/12/03  23:37:08  af]
     * 
     * Revision 2.1.1.1  90/11/01  03:41:38  af
     *      Re-Created from pm_switch.c for consistent file naming.
     *      [90/09/03            af]
     * 
     */
    /*
     *      File: screen_switch.c
     *      Author: Alessandro Forin, Carnegie Mellon University
     *      Date:   9/90
     *
     *      Autoconfiguration code for the Generic Screen Driver.
     */
    
    #include <platforms.h>
    
    #if     defined(DECSTATION) || defined(FLAMINGO)
    #include <fb.h>
    #include <gx.h>
    #include <cfb.h>
    #include <mfb.h>
    #include <xcfb.h>
    #include <sfb.h>
    #endif
    
    #ifdef  VAXSTATION
    #define NGX 0
    #define NCFB 0
    #define NXCFB 0
    #endif
    
    #include <chips/screen_switch.h>
    
    /* When nothing needed */
    int screen_noop()
   {}
   
   /*
    * Vector of graphic interface drivers to probe.
    * Zero terminate this list.
    */
   
   
   #if     NGX > 0
   extern int gq_probe(), gq_cold_init();
   extern unsigned int gq_mem_need();
   
   extern int ga_probe(), ga_cold_init();
   extern unsigned int ga_mem_need();
   #endif  /* NGX > 0 */
   
   #if     NCFB > 0
   extern int cfb_probe(), cfb_cold_init();
   extern unsigned int pm_mem_need();
   #endif  /* NCFB > 0 */
   
   #if     NMFB > 0
   extern int fb_probe(), fb_cold_init();
   extern unsigned int pm_mem_need();
   #endif  /* NMFB > 0 */
   
   #if     NXCFB > 0
   extern int xcfb_probe(), xcfb_cold_init();
   extern unsigned int pm_mem_need();
   #endif  /* NXCFB > 0 */
   
   #if     NSFB > 0
   extern int sfb_probe(), sfb_cold_init();
   extern unsigned int pm_mem_need();
   #endif  /* NSFB > 0 */
   
   #if     NFB > 0
   extern int pm_probe(), pm_cold_init();
   extern unsigned int pm_mem_need();
   #endif  /* NFB > 0 */
   
   struct screen_probe_vector screen_probe_vector[] = {
   
   #if     NGX > 0
           gq_probe, gq_mem_need, gq_cold_init, /* 3max 3D color option */
           ga_probe, ga_mem_need, ga_cold_init, /* 3max 2D color option */
   #endif  /* NGX > 0 */
   
   #if     NSFB > 0
           sfb_probe, pm_mem_need, sfb_cold_init, /* Smart frame buffer */
   #endif  /* NSFB > 0 */
   
   #if     NMFB > 0
           fb_probe, pm_mem_need, fb_cold_init, /* 3max/3min 1D(?) mono option */
   #endif  /* NMFB > 0 */
   
   #if     NCFB > 0
           cfb_probe, pm_mem_need, cfb_cold_init, /* 3max 1D(?) color option */
   #endif  /* NCFB > 0 */
   
   #if     NXCFB > 0
           xcfb_probe, pm_mem_need, xcfb_cold_init,/* MAXine frame buffer */
   #endif  /* NXCFB > 0 */
   
   #if     NFB > 0
           pm_probe, pm_mem_need, pm_cold_init, /* "pm" mono/color (pmax) */
   #endif
           0,
   };
   
   char    *screen_data;   /* opaque */
   
   int screen_find()
   {
           struct screen_probe_vector *p = screen_probe_vector;
           for (;p->probe; p++)
                   if ((*p->probe)()) {
                           (*p->setup)(0/*XXX*/, screen_data);
                           return 1;
                   }
           return 0;
   }
   
   unsigned int
   screen_memory_alloc(avail)
           char *avail;
   {
           struct screen_probe_vector *p = screen_probe_vector;
           int             size;
           for (; p->probe; p++)
                   if ((*p->probe) ()) {
                           screen_data = avail;
                           size = (*p->alloc) ();
                           bzero(screen_data, size);
                           return size;
                   }
           return 0;
   
   }
   

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