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