1 // SPDX-License-Identifier: GPL-2.0-only 2 3 /* 4 * Linux logo to be displayed on boot 5 * 6 * Copyright (C) 1996 Larry Ewing (lewing@isc.tamu.edu) 7 * Copyright (C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 * Copyright (C) 2001 Greg Banks <gnb@alphalink.com.au> 9 * Copyright (C) 2001 Jan-Benedict Glaw <jbglaw@lug-owl.de> 10 * Copyright (C) 2003 Geert Uytterhoeven <geert@linux-m68k.org> 11 */ 12 13 #include <linux/linux_logo.h> 14 #include <linux/stddef.h> 15 #include <linux/module.h> 16 17 #ifdef CONFIG_M68K 18 #include <asm/setup.h> 19 #endif 20 21 static bool nologo; 22 module_param(nologo, bool, 0); 23 MODULE_PARM_DESC(nologo, "Disables startup logo"); 24 25 /* 26 * Logos are located in the initdata, and will be freed in kernel_init. 27 * Use late_init to mark the logos as freed to prevent any further use. 28 */ 29 30 static bool logos_freed; 31 32 static int __init fb_logo_late_init(void) 33 { 34 logos_freed = true; 35 return 0; 36 } 37 38 late_initcall_sync(fb_logo_late_init); 39 40 /* logo's are marked __initdata. Use __ref to tell 41 * modpost that it is intended that this function uses data 42 * marked __initdata. 43 */ 44 const struct linux_logo * __ref fb_find_logo(int depth) 45 { 46 const struct linux_logo *logo = NULL; 47 48 if (nologo || logos_freed) 49 return NULL; 50 51 if (depth >= 1) { 52 #ifdef CONFIG_LOGO_LINUX_MONO 53 /* Generic Linux logo */ 54 logo = &logo_linux_mono; 55 #endif 56 #ifdef CONFIG_LOGO_SUPERH_MONO 57 /* SuperH Linux logo */ 58 logo = &logo_superh_mono; 59 #endif 60 } 61 62 if (depth >= 4) { 63 #ifdef CONFIG_LOGO_LINUX_VGA16 64 /* Generic Linux logo */ 65 logo = &logo_linux_vga16; 66 #endif 67 #ifdef CONFIG_LOGO_SUPERH_VGA16 68 /* SuperH Linux logo */ 69 logo = &logo_superh_vga16; 70 #endif 71 } 72 73 if (depth >= 8) { 74 #ifdef CONFIG_LOGO_LINUX_CLUT224 75 /* Generic Linux logo */ 76 logo = &logo_linux_clut224; 77 #endif 78 #ifdef CONFIG_LOGO_DEC_CLUT224 79 /* DEC Linux logo on MIPS/MIPS64 or ALPHA */ 80 logo = &logo_dec_clut224; 81 #endif 82 #ifdef CONFIG_LOGO_MAC_CLUT224 83 /* Macintosh Linux logo on m68k */ 84 if (MACH_IS_MAC) 85 logo = &logo_mac_clut224; 86 #endif 87 #ifdef CONFIG_LOGO_PARISC_CLUT224 88 /* PA-RISC Linux logo */ 89 logo = &logo_parisc_clut224; 90 #endif 91 #ifdef CONFIG_LOGO_SGI_CLUT224 92 /* SGI Linux logo on MIPS/MIPS64 */ 93 logo = &logo_sgi_clut224; 94 #endif 95 #ifdef CONFIG_LOGO_SUN_CLUT224 96 /* Sun Linux logo */ 97 logo = &logo_sun_clut224; 98 #endif 99 #ifdef CONFIG_LOGO_SUPERH_CLUT224 100 /* SuperH Linux logo */ 101 logo = &logo_superh_clut224; 102 #endif 103 } 104 return logo; 105 } 106 EXPORT_SYMBOL_GPL(fb_find_logo); 107