Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 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/console.h> |
| 11 | #include <linux/init.h> |
| 12 | |
Dmitri Vorobiev | 07cdb78 | 2008-05-29 17:57:08 +0300 | [diff] [blame] | 13 | #include <asm/setup.h> |
| 14 | |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 15 | extern void prom_putchar(char); |
| 16 | |
Franck Bui-Huu | ca4437d | 2007-05-03 12:58:54 +0200 | [diff] [blame] | 17 | static void __init |
| 18 | early_console_write(struct console *con, const char *s, unsigned n) |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 19 | { |
| 20 | while (n-- && *s) { |
| 21 | if (*s == '\n') |
| 22 | prom_putchar('\r'); |
| 23 | prom_putchar(*s); |
| 24 | s++; |
| 25 | } |
| 26 | } |
| 27 | |
Franck Bui-Huu | ca4437d | 2007-05-03 12:58:54 +0200 | [diff] [blame] | 28 | static struct console early_console __initdata = { |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 29 | .name = "early", |
| 30 | .write = early_console_write, |
| 31 | .flags = CON_PRINTBUFFER | CON_BOOT, |
| 32 | .index = -1 |
| 33 | }; |
| 34 | |
Franck Bui-Huu | 36ea1d5 | 2007-05-03 13:01:32 +0200 | [diff] [blame] | 35 | static int early_console_initialized __initdata; |
| 36 | |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 37 | void __init setup_early_printk(void) |
| 38 | { |
Franck Bui-Huu | 36ea1d5 | 2007-05-03 13:01:32 +0200 | [diff] [blame] | 39 | if (early_console_initialized) |
| 40 | return; |
| 41 | early_console_initialized = 1; |
| 42 | |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 43 | register_console(&early_console); |
| 44 | } |