| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2011 Richard Weinberger <richrd@nod.at> |
| 4 | */ |
| 5 | |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/console.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <os.h> |
| 10 | |
| 11 | static void early_console_write(struct console *con, const char *s, unsigned int n) |
| 12 | { |
| 13 | um_early_printk(s, n); |
| 14 | } |
| 15 | |
| 16 | static struct console early_console_dev = { |
| 17 | .name = "earlycon", |
| 18 | .write = early_console_write, |
| 19 | .flags = CON_BOOT, |
| 20 | .index = -1, |
| 21 | }; |
| 22 | |
| 23 | static int __init setup_early_printk(char *buf) |
| 24 | { |
| 25 | if (!early_console) { |
| 26 | early_console = &early_console_dev; |
| 27 | register_console(&early_console_dev); |
| 28 | } |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | early_param("earlyprintk", setup_early_printk); |
| 33 |