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 13 extern void prom_putchar(char); 14 15 static void early_console_write(struct console *con, const char *s, unsigned n) 16 { 17 while (n-- && *s) { 18 if (*s == '\n') 19 prom_putchar('\r'); 20 prom_putchar(*s); 21 s++; 22 } 23 } 24 25 static struct console early_console = { 26 .name = "early", 27 .write = early_console_write, 28 .flags = CON_PRINTBUFFER | CON_BOOT, 29 .index = -1 30 }; 31 32 void __init setup_early_printk(void) 33 { 34 register_console(&early_console); 35 } 36 37 void __init disable_early_printk(void) 38 { 39 unregister_console(&early_console); 40 } 41