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 __init 16 early_console_write(struct console *con, const char *s, unsigned n) 17 { 18 while (n-- && *s) { 19 if (*s == '\n') 20 prom_putchar('\r'); 21 prom_putchar(*s); 22 s++; 23 } 24 } 25 26 static struct console early_console __initdata = { 27 .name = "early", 28 .write = early_console_write, 29 .flags = CON_PRINTBUFFER | CON_BOOT, 30 .index = -1 31 }; 32 33 static int early_console_initialized __initdata; 34 35 void __init setup_early_printk(void) 36 { 37 if (early_console_initialized) 38 return; 39 early_console_initialized = 1; 40 41 register_console(&early_console); 42 } 43