2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
18 * Putting things on the screen/serial line using YAMONs facilities.
20 #include <linux/console.h>
21 #include <linux/init.h>
22 #include <linux/serial_reg.h>
26 #define PORT(offset) (0x3f8 + (offset))
29 static inline unsigned int serial_in(int offset)
31 return inb(PORT(offset));
34 static inline void serial_out(int offset, int value)
36 outb(value, PORT(offset));
39 int prom_putchar(char c)
41 while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
44 serial_out(UART_TX, c);