cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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logo.c (2423B)

      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
     21static bool nologo;
     22module_param(nologo, bool, 0);
     23MODULE_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
     30static bool logos_freed;
     31
     32static int __init fb_logo_late_init(void)
     33{
     34	logos_freed = true;
     35	return 0;
     36}
     37
     38late_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 */
     44const 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}
    106EXPORT_SYMBOL_GPL(fb_find_logo);