Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
9static 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
17void 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}