1 /* 2 * arch/mips/dec/prom/console.c 3 * 4 * DECstation PROM-based early console support. 5 * 6 * Copyright (C) 2004, 2007 Maciej W. Rozycki 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 11 * 2 of the License, or (at your option) any later version. 12 */ 13 #include <linux/console.h> 14 #include <linux/init.h> 15 #include <linux/kernel.h> 16 #include <linux/string.h> 17 18 #include <asm/dec/prom.h> 19 20 static void __init prom_console_write(struct console *con, const char *s, 21 unsigned int c) 22 { 23 char buf[81]; 24 unsigned int chunk = sizeof(buf) - 1; 25 26 while (c > 0) { 27 if (chunk > c) 28 chunk = c; 29 memcpy(buf, s, chunk); 30 buf[chunk] = '\0'; 31 prom_printf("%s", buf); 32 s += chunk; 33 c -= chunk; 34 } 35 } 36 37 static struct console promcons __initdata = { 38 .name = "prom", 39 .write = prom_console_write, 40 .flags = CON_BOOT | CON_PRINTBUFFER, 41 .index = -1, 42 }; 43 44 void __init register_prom_console(void) 45 { 46 register_console(&promcons); 47 } 48