1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/io.h>
4 #include <linux/processor.h>
5
6 #include <asm/sn/ioc3.h>
7 #include <asm/setup.h>
8
9 static inline struct ioc3_uartregs *console_uart(void)
10 {
11 struct ioc3 *ioc3;
12
13 ioc3 = (struct ioc3 *)((void *)(0x900000001f600000));
14 return &ioc3->sregs.uarta;
15 }
16
17 void prom_putchar(char c)
18 {
19 struct ioc3_uartregs *uart = console_uart();
20
21 while ((readb(&uart->iu_lsr) & 0x20) == 0)
22 cpu_relax();
23
24 writeb(c, &uart->iu_thr);
25 }
26
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