| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * OF console routines |
| 4 | * |
| 5 | * Copyright (C) Paul Mackerras 1997. |
| 6 | */ |
| 7 | #include <stddef.h> |
| 8 | #include "types.h" |
| 9 | #include "elf.h" |
| 10 | #include "string.h" |
| 11 | #include "stdio.h" |
| 12 | #include "page.h" |
| 13 | #include "ops.h" |
| 14 | |
| 15 | #include "of.h" |
| 16 | |
| 17 | static unsigned int of_stdout_handle; |
| 18 | |
| 19 | static int of_console_open(void) |
| 20 | { |
| 21 | void *devp; |
| 22 | |
| 23 | if (((devp = of_finddevice("/chosen")) != NULL) |
| 24 | && (of_getprop(devp, "stdout", &of_stdout_handle, |
| 25 | sizeof(of_stdout_handle)) |
| 26 | == sizeof(of_stdout_handle))) { |
| 27 | of_stdout_handle = be32_to_cpu(of_stdout_handle); |
| 28 | return 0; |
| 29 | } |
| 30 | |
| 31 | return -1; |
| 32 | } |
| 33 | |
| 34 | static void of_console_write(const char *buf, int len) |
| 35 | { |
| 36 | of_call_prom(service: "write", nargs: 3, nret: 1, of_stdout_handle, buf, len); |
| 37 | } |
| 38 | |
| 39 | void of_console_init(void) |
| 40 | { |
| 41 | console_ops.open = of_console_open; |
| 42 | console_ops.write = of_console_write; |
| 43 | } |
| 44 |