mips/sgi-ip30/ip30-console.c

0001 // SPDX-License-Identifier: GPL-2.0
0002
0003 #include <linux/io.h>
0004
0005 #include <asm/sn/ioc3.h>
0006
0007 static inline struct ioc3_uartregs *console_uart(void)
0008 {
0009     struct ioc3 *ioc3;
0010
0011     ioc3 = (struct ioc3 *)((void *)(0x900000001f600000));
0012     return &ioc3->sregs.uarta;
0013 }
0014
0015 void prom_putchar(char c)
0016 {
0017     struct ioc3_uartregs *uart = console_uart();
0018
0019     while ((readb(&uart->iu_lsr) & 0x20) == 0)
0020         cpu_relax();
0021
0022     writeb(c, &uart->iu_thr);
0023 }