release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/cobalt/console.c

   1 /*
   2  * (C) P. Horton 2006
   3  */
   4 #include <linux/io.h>
   5 #include <linux/serial_reg.h>
   6
   7 #include <cobalt.h>
   8
   9 #define UART_BASE       ((void __iomem *)CKSEG1ADDR(0x1c800000))
  10
  11 void prom_putchar(char c)
  12 {
  13         if (cobalt_board_id <= COBALT_BRD_ID_QUBE1)
  14                 return;
  15
  16         while (!(readb(UART_BASE + UART_LSR) & UART_LSR_THRE))
  17                 ;
  18
  19         writeb(c, UART_BASE + UART_TX);
  20 }