LXR linux/drivers/video/logo/logo.c

   1
   2/*
   3 *  Linux logo to be displayed on boot
   4 *
   5 *  Copyright (C) 1996 Larry Ewing (lewing@isc.tamu.edu)
   6 *  Copyright (C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7 *  Copyright (C) 2001 Greg Banks <gnb@alphalink.com.au>
   8 *  Copyright (C) 2001 Jan-Benedict Glaw <jbglaw@lug-owl.de>
   9 *  Copyright (C) 2003 Geert Uytterhoeven <geert@linux-m68k.org>
  10 */
  11
  12#include <linux/linux_logo.h>
  13#include <linux/stddef.h>
  14#include <linux/module.h>
  15
  16#ifdef CONFIG_M68K
  17#include <asm/setup.h>
  18#endif
  19
  20static bool nologo;
  21module_param(nologo, bool, 0);
  22MODULE_PARM_DESC(nologo, "Disables startup logo");
  23
  24/*
  25 * Logos are located in the initdata, and will be freed in kernel_init.
  26 * Use late_init to mark the logos as freed to prevent any further use.
  27 */
  28
  29static bool logos_freed;
  30
  31static int __init fb_logo_late_init(void)
  32{
  33        logos_freed = true;
  34        return 0;
  35}
  36
  37late_initcall(fb_logo_late_init);
  38
  39/* logo's are marked __initdata. Use __ref to tell
  40 * modpost that it is intended that this function uses data
  41 * marked __initdata.
  42 */
  43const struct linux_logo * __ref fb_find_logo(int depth)
  44{
  45        const struct linux_logo *logo = NULL;
  46
  47        if (nologo || logos_freed)
  48                return NULL;
  49
  50        if (depth >= 1) {
  51#ifdef CONFIG_LOGO_LINUX_MONO
  52                /* Generic Linux logo */
  53                logo = &logo_linux_mono;
  54#endif
  55#ifdef CONFIG_LOGO_SUPERH_MONO
  56                /* SuperH Linux logo */
  57                logo = &logo_superh_mono;
  58#endif
  59        }
  60        
  61        if (depth >= 4) {
  62#ifdef CONFIG_LOGO_LINUX_VGA16
  63                /* Generic Linux logo */
  64                logo = &logo_linux_vga16;
  65#endif
  66#ifdef CONFIG_LOGO_BLACKFIN_VGA16
  67                /* Blackfin processor logo */
  68                logo = &logo_blackfin_vga16;
  69#endif
  70#ifdef CONFIG_LOGO_SUPERH_VGA16
  71                /* SuperH Linux logo */
  72                logo = &logo_superh_vga16;
  73#endif
  74        }
  75        
  76        if (depth >= 8) {
  77#ifdef CONFIG_LOGO_LINUX_CLUT224
  78                /* Generic Linux logo */
  79                logo = &logo_linux_clut224;
  80#endif
  81#ifdef CONFIG_LOGO_BLACKFIN_CLUT224
  82                /* Blackfin Linux logo */
  83                logo = &logo_blackfin_clut224;
  84#endif
  85#ifdef CONFIG_LOGO_DEC_CLUT224
  86                /* DEC Linux logo on MIPS/MIPS64 or ALPHA */
  87                logo = &logo_dec_clut224;
  88#endif
  89#ifdef CONFIG_LOGO_MAC_CLUT224
  90                /* Macintosh Linux logo on m68k */
  91                if (MACH_IS_MAC)
  92                        logo = &logo_mac_clut224;
  93#endif
  94#ifdef CONFIG_LOGO_PARISC_CLUT224
  95                /* PA-RISC Linux logo */
  96                logo = &logo_parisc_clut224;
  97#endif
  98#ifdef CONFIG_LOGO_SGI_CLUT224
  99                /* SGI Linux logo on MIPS/MIPS64 */
 100                logo = &logo_sgi_clut224;
 101#endif
 102#ifdef CONFIG_LOGO_SUN_CLUT224
 103                /* Sun Linux logo */
 104                logo = &logo_sun_clut224;
 105#endif
 106#ifdef CONFIG_LOGO_SUPERH_CLUT224
 107                /* SuperH Linux logo */
 108                logo = &logo_superh_clut224;
 109#endif
 110#ifdef CONFIG_LOGO_M32R_CLUT224
 111                /* M32R Linux logo */
 112                logo = &logo_m32r_clut224;
 113#endif
 114        }
 115        return logo;
 116}
 117EXPORT_SYMBOL_GPL(fb_find_logo);
 118