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