| /* |
| * This program is free software; you can distribute it and/or modify it |
| * under the terms of the GNU General Public License (Version 2) as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| * |
| * Carsten Langgaard, carstenl@mips.com |
| * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. |
| * Copyright (C) 2007 MIPS Technologies, Inc. |
| * written by Ralf Baechle |
| */ |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/serial_reg.h> |
| |
| static inline unsigned int serial_in(int offset) |
| { |
| return inb(0x3f8 + offset); |
| } |
| |
| static inline void serial_out(int offset, int value) |
| { |
| outb(value, 0x3f8 + offset); |
| } |
| |
| void __init prom_putchar(char c) |
| { |
| while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0) |
| ; |
| |
| serial_out(UART_TX, c); |
| } |