| 1 | /* |
|---|---|
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2002, 2003, 06, 07 Ralf Baechle (ralf@linux-mips.org) |
| 7 | * Copyright (C) 2007 MIPS Technologies, Inc. |
| 8 | * written by Ralf Baechle (ralf@linux-mips.org) |
| 9 | */ |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/console.h> |
| 12 | #include <linux/printk.h> |
| 13 | #include <linux/init.h> |
| 14 | |
| 15 | #include <asm/setup.h> |
| 16 | |
| 17 | static void early_console_write(struct console *con, const char *s, unsigned n) |
| 18 | { |
| 19 | while (n-- && *s) { |
| 20 | if (*s == '\n') |
| 21 | prom_putchar('\r'); |
| 22 | prom_putchar(*s); |
| 23 | s++; |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | static struct console early_console_prom = { |
| 28 | .name = "early", |
| 29 | .write = early_console_write, |
| 30 | .flags = CON_PRINTBUFFER | CON_BOOT, |
| 31 | .index = -1 |
| 32 | }; |
| 33 | |
| 34 | void __init setup_early_printk(void) |
| 35 | { |
| 36 | if (early_console) |
| 37 | return; |
| 38 | early_console = &early_console_prom; |
| 39 | |
| 40 | register_console(&early_console_prom); |
| 41 | } |
| 42 |