| // SPDX-License-Identifier: GPL-2.0-only |
| |
| /* |
| * Linux logo to be displayed on boot |
| * |
| * Copyright (C) 1996 Larry Ewing (lewing@isc.tamu.edu) |
| * Copyright (C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| * Copyright (C) 2001 Greg Banks <gnb@alphalink.com.au> |
| * Copyright (C) 2001 Jan-Benedict Glaw <jbglaw@lug-owl.de> |
| * Copyright (C) 2003 Geert Uytterhoeven <geert@linux-m68k.org> |
| */ |
| |
| #include <linux/linux_logo.h> |
| #include <linux/stddef.h> |
| #include <linux/module.h> |
| |
| #ifdef CONFIG_M68K |
| #include <asm/setup.h> |
| #endif |
| |
| static bool nologo; |
| module_param(nologo, bool, 0); |
| MODULE_PARM_DESC(nologo, "Disables startup logo"); |
| |
| /* |
| * Logos are located in the initdata, and will be freed in kernel_init. |
| * Use late_init to mark the logos as freed to prevent any further use. |
| */ |
| |
| static bool logos_freed; |
| |
| static int __init fb_logo_late_init(void) |
| { |
| logos_freed = true; |
| return 0; |
| } |
| |
| late_initcall_sync(fb_logo_late_init); |
| |
| /* logo's are marked __initdata. Use __ref to tell |
| * modpost that it is intended that this function uses data |
| * marked __initdata. |
| */ |
| const struct linux_logo * __ref fb_find_logo(int depth) |
| { |
| const struct linux_logo *logo = NULL; |
| |
| if (nologo || logos_freed) |
| return NULL; |
| |
| #ifdef CONFIG_LOGO_LINUX_MONO |
| if (depth >= 1) |
| logo = &logo_linux_mono; |
| #endif |
| |
| #ifdef CONFIG_LOGO_LINUX_VGA16 |
| if (depth >= 4) |
| logo = &logo_linux_vga16; |
| #endif |
| |
| #ifdef CONFIG_LOGO_LINUX_CLUT224 |
| if (depth >= 8) |
| logo = &logo_linux_clut224; |
| #endif |
| |
| return logo; |
| } |
| EXPORT_SYMBOL_GPL(fb_find_logo); |
