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q-console.c

#include <linux/console.h>
#include <linux/init.h>
#include <linux/serial_reg.h>
#include <asm/io.h>

#define PORT(offset) (0x3f8 + (offset))

static inline unsigned int serial_in(int offset)
{
      return inb(PORT(offset));
}

static inline void serial_out(int offset, int value)
{
      outb(value, PORT(offset));
}

int prom_putchar(char c)
{
      while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
            ;

      serial_out(UART_TX, c);

      return 1;
}

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