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>
25 #ifdef CONFIG_MIPS_ATLAS
26 #include <asm/mips-boards/atlas.h>
28 #ifdef CONFIG_CPU_LITTLE_ENDIAN
29 #define PORT(offset) (ATLAS_UART_REGS_BASE + ((offset)<<3))
31 #define PORT(offset) (ATLAS_UART_REGS_BASE + 3 + ((offset)<<3))
34 #elif defined(CONFIG_MIPS_SEAD)
36 #include <asm/mips-boards/sead.h>
38 #ifdef CONFIG_CPU_LITTLE_ENDIAN
39 #define PORT(offset) (SEAD_UART0_REGS_BASE + ((offset)<<3))
41 #define PORT(offset) (SEAD_UART0_REGS_BASE + 3 + ((offset)<<3))
46 #define PORT(offset) (0x3f8 + (offset))
50 static inline unsigned int serial_in(int offset)
52 return inb(PORT(offset));
55 static inline void serial_out(int offset, int value)
57 outb(value, PORT(offset));
60 int prom_putchar(char c)
62 while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
65 serial_out(UART_TX, c);