blob: 81101ae5017a883d2c92eb3138768ea32736c8de [file] [log] [blame]
Ralf Baechlea57c2282007-11-04 04:49:44 +00001#include <linux/console.h>
2#include <linux/init.h>
3#include <linux/serial_reg.h>
4#include <asm/io.h>
5
6#define PORT(offset) (0x3f8 + (offset))
7
8static inline unsigned int serial_in(int offset)
9{
10 return inb(PORT(offset));
11}
12
13static inline void serial_out(int offset, int value)
14{
15 outb(value, PORT(offset));
16}
17
18int prom_putchar(char c)
19{
20 while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
21 ;
22
23 serial_out(UART_TX, c);
24
25 return 1;
26}