| 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 | |
| 8 | static 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 | |
| 16 | void prom_putchar(char c) |
| 17 | { |
| 18 | struct ioc3_uartregs *uart = console_uart(); |
| 19 | |
| 20 | while ((readb(addr: &uart->iu_lsr) & 0x20) == 0) |
| 21 | cpu_relax(); |
| 22 | |
| 23 | writeb(val: c, addr: &uart->iu_thr); |
| 24 | } |
| 25 |