LXR linux/arch/mips/sgi-ip30/ip30-console.c

   1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <linux/io.h>
   4
   5#include <asm/sn/ioc3.h>
   6
   7static inline struct ioc3_uartregs *console_uart(void)
   8{
   9        struct ioc3 *ioc3;
  10
  11        ioc3 = (struct ioc3 *)((void *)(0x900000001f600000));
  12        return &ioc3->sregs.uarta;
  13}
  14
  15void prom_putchar(char c)
  16{
  17        struct ioc3_uartregs *uart = console_uart();
  18
  19        while ((readb(&uart->iu_lsr) & 0x20) == 0)
  20                cpu_relax();
  21
  22        writeb(c, &uart->iu_thr);
  23}
  24