The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/splash.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/5.1/sys/dev/fb/splash.c 81051 2001-08-02 13:23:17Z yokota $
   27  */
   28 
   29 #include "opt_splash.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/malloc.h>
   34 #include <sys/linker.h>
   35 #include <sys/fbio.h>
   36 #include <sys/kernel.h>
   37 
   38 #include <dev/fb/fbreg.h>
   39 #include <dev/fb/splashreg.h>
   40 
   41 MODULE_VERSION(splash, 1);
   42 
   43 /* video adapter and image decoder */
   44 static video_adapter_t  *splash_adp;
   45 static splash_decoder_t *splash_decoder;
   46 
   47 /* decoder candidates */
   48 static int              decoders;
   49 static splash_decoder_t **decoder_set;
   50 #define DECODER_ARRAY_DELTA 4
   51 
   52 /* console driver callback */
   53 static int              (*splash_callback)(int, void *);
   54 static void             *splash_arg;
   55 
   56 static int
   57 splash_find_data(splash_decoder_t *decoder)
   58 {
   59         caddr_t image_module;
   60         caddr_t p;
   61 
   62         if (decoder->data_type == NULL)
   63                 return 0;
   64         image_module = preload_search_by_type(decoder->data_type);
   65         if (image_module == NULL)
   66                 return ENOENT;
   67         p = preload_search_info(image_module, MODINFO_ADDR);
   68         if (p == NULL)
   69                 return ENOENT;
   70         decoder->data = *(void **)p;
   71         p = preload_search_info(image_module, MODINFO_SIZE);
   72         if (p == NULL)
   73                 return ENOENT;
   74         decoder->data_size = *(size_t *)p;
   75         if (bootverbose)
   76                 printf("splash: image@%p, size:%lu\n",
   77                        (void *)decoder->data, (long)decoder->data_size);
   78         return 0;
   79 }
   80 
   81 static int
   82 splash_test(splash_decoder_t *decoder)
   83 {
   84         if (splash_find_data(decoder))
   85                 return ENOENT;  /* XXX */
   86         if (*decoder->init && (*decoder->init)(splash_adp)) {
   87                 decoder->data = NULL;
   88                 decoder->data_size = 0;
   89                 return ENODEV;  /* XXX */
   90         }
   91         if (bootverbose)
   92                 printf("splash: image decoder found: %s\n", decoder->name);
   93         return 0;
   94 }
   95 
   96 static void
   97 splash_new(splash_decoder_t *decoder)
   98 {
   99         splash_decoder = decoder;
  100         if (splash_callback != NULL)
  101                 (*splash_callback)(SPLASH_INIT, splash_arg);
  102 }
  103 
  104 int
  105 splash_register(splash_decoder_t *decoder)
  106 {
  107         splash_decoder_t **p;
  108         int error;
  109         int i;
  110 
  111         if (splash_adp != NULL) {
  112                 /*
  113                  * If the video card has aleady been initialized, test
  114                  * this decoder immediately.
  115                  */
  116                 error = splash_test(decoder);
  117                 if (error == 0) {
  118                         /* replace the current decoder with new one */
  119                         if (splash_decoder != NULL)
  120                                 error = splash_term(splash_adp);
  121                         if (error == 0)
  122                                 splash_new(decoder);
  123                 }
  124                 return error;
  125         } else {
  126                 /* register the decoder for later use */
  127                 for (i = 0; i < decoders; ++i) {
  128                         if (decoder_set[i] == NULL)
  129                                 break;
  130                 }
  131                 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
  132                         p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
  133                                 M_DEVBUF, M_NOWAIT);
  134                         if (p == NULL)
  135                                 return ENOMEM;
  136                         if (decoder_set != NULL) {
  137                                 bcopy(decoder_set, p, sizeof(*p)*decoders);
  138                                 free(decoder_set, M_DEVBUF);
  139                         }
  140                         decoder_set = p;
  141                         i = decoders++;
  142                 }
  143                 decoder_set[i] = decoder;
  144         }
  145 
  146         return 0;
  147 }
  148 
  149 int
  150 splash_unregister(splash_decoder_t *decoder)
  151 {
  152         int error;
  153 
  154         if (splash_decoder == decoder) {
  155                 if ((error = splash_term(splash_adp)) != 0)
  156                         return error;
  157         }
  158         return 0;
  159 }
  160 
  161 int
  162 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
  163 {
  164         int i;
  165 
  166         splash_adp = adp;
  167         splash_callback = callback;
  168         splash_arg = arg;
  169 
  170         splash_decoder = NULL;
  171         for (i = 0; i < decoders; ++i) {
  172                 if (decoder_set[i] == NULL)
  173                         continue;
  174                 if (splash_test(decoder_set[i]) == 0) {
  175                         splash_new(decoder_set[i]);
  176                         break;
  177                 }
  178                 decoder_set[i] = NULL;
  179         }
  180         for (++i; i < decoders; ++i) {
  181                 decoder_set[i] = NULL;
  182         }
  183         return 0;
  184 }
  185 
  186 int
  187 splash_term(video_adapter_t *adp)
  188 {
  189         int error = 0;
  190 
  191         if (splash_adp != adp)
  192                 return EINVAL;
  193         if (splash_decoder != NULL) {
  194                 if (splash_callback != NULL)
  195                         error = (*splash_callback)(SPLASH_TERM, splash_arg);
  196                 if (error == 0 && splash_decoder->term)
  197                         error = (*splash_decoder->term)(adp);
  198                 if (error == 0)
  199                         splash_decoder = NULL;
  200         }
  201         return error;
  202 }
  203 
  204 int
  205 splash(video_adapter_t *adp, int on)
  206 {
  207         if (splash_decoder != NULL)
  208                 return (*splash_decoder->splash)(adp, on);
  209         return ENODEV;
  210 }

Cache object: 19262542d78008867b806e90aba0a78c


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