// SPDX-License-Identifier: GPL-2.0 #include <linux/io.h> #include <asm/sn/ioc3.h> static inline struct ioc3_uartregs *console_uart(void) { struct ioc3 *ioc3; ioc3 = (struct ioc3 *)((void *)(0x900000001f600000)); return &ioc3->sregs.uarta; } void prom_putchar(char c) { struct ioc3_uartregs *uart = console_uart(); while ((readb(&uart->iu_lsr) & 0x20) == 0) cpu_relax(); writeb(c, &uart->iu_thr); }