1*2874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 22e601613SDavid Gibson /* 32e601613SDavid Gibson * OF console routines 42e601613SDavid Gibson * 52e601613SDavid Gibson * Copyright (C) Paul Mackerras 1997. 62e601613SDavid Gibson */ 72e601613SDavid Gibson #include <stddef.h> 82e601613SDavid Gibson #include "types.h" 92e601613SDavid Gibson #include "elf.h" 102e601613SDavid Gibson #include "string.h" 112e601613SDavid Gibson #include "stdio.h" 122e601613SDavid Gibson #include "page.h" 132e601613SDavid Gibson #include "ops.h" 142e601613SDavid Gibson 152e601613SDavid Gibson #include "of.h" 162e601613SDavid Gibson 17926e6940SCédric Le Goater static unsigned int of_stdout_handle; 182e601613SDavid Gibson 192e601613SDavid Gibson static int of_console_open(void) 202e601613SDavid Gibson { 212e601613SDavid Gibson void *devp; 222e601613SDavid Gibson 2308464712SDavid Gibson if (((devp = of_finddevice("/chosen")) != NULL) 2408464712SDavid Gibson && (of_getprop(devp, "stdout", &of_stdout_handle, 252e601613SDavid Gibson sizeof(of_stdout_handle)) 26926e6940SCédric Le Goater == sizeof(of_stdout_handle))) { 27926e6940SCédric Le Goater of_stdout_handle = be32_to_cpu(of_stdout_handle); 282e601613SDavid Gibson return 0; 29926e6940SCédric Le Goater } 302e601613SDavid Gibson 312e601613SDavid Gibson return -1; 322e601613SDavid Gibson } 332e601613SDavid Gibson 34b96fbb6eSGeoff Levand static void of_console_write(const char *buf, int len) 352e601613SDavid Gibson { 362e601613SDavid Gibson of_call_prom("write", 3, 1, of_stdout_handle, buf, len); 372e601613SDavid Gibson } 382e601613SDavid Gibson 392e601613SDavid Gibson void of_console_init(void) 402e601613SDavid Gibson { 412e601613SDavid Gibson console_ops.open = of_console_open; 422e601613SDavid Gibson console_ops.write = of_console_write; 432e601613SDavid Gibson } 44