/arch/um/kernel/early_printk.c

http://github.com/mirrors/linux · C · 32 lines · 23 code · 5 blank · 4 comment · 1 complexity · 55403069c5229b4298e8771d991b3117 MD5 · raw file 

    

  1. // SPDX-License-Identifier: GPL-2.0-only
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
    4. 

  4.  */
    5. 

  5. 

  6. #include <linux/kernel.h>
    7. 

  7. #include <linux/console.h>
    8. 

  8. #include <linux/init.h>
    9. 

  9. #include <os.h>
    10. 

  10. 

  11. static void early_console_write(struct console *con, const char *s, unsigned int n)
    12. 

  12. {
    13. 

  13. 	um_early_printk(s, n);
    14. 

  14. }
    15. 

  15. 

  16. static struct console early_console_dev = {
    17. 

  17. 	.name = "earlycon",
    18. 

  18. 	.write = early_console_write,
    19. 

  19. 	.flags = CON_BOOT,
    20. 

  20. 	.index = -1,
    21. 

  21. };
    22. 

  22. 

  23. static int __init setup_early_printk(char *buf)
    24. 

  24. {
    25. 

  25. 	if (!early_console) {
    26. 

  26. 		early_console = &early_console_dev;
    27. 

  27. 		register_console(&early_console_dev);
    28. 

  28. 	}
    29. 

  29. 	return 0;
    30. 

  30. }
    31. 

  31. 

  32. early_param("earlyprintk", setup_early_printk);
    33.