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 #include <asm/setup.h> 14 15 extern void prom_putchar(char); 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 = { 28 .name = "early", 29 .write = early_console_write, 30 .flags = CON_PRINTBUFFER | CON_BOOT, 31 .index = -1 32 }; 33 34 static int early_console_initialized __initdata; 35 36 void __init setup_early_printk(void) 37 { 38 if (early_console_initialized) 39 return; 40 early_console_initialized = 1; 41 42 register_console(&early_console); 43 } 44