| 1 | /* |
|---|---|
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (c) 2014 Finn Thain |
| 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/console.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <asm/setup.h> |
| 14 | |
| 15 | |
| 16 | #include "../mvme147/mvme147.h" |
| 17 | #include "../mvme16x/mvme16x.h" |
| 18 | |
| 19 | asmlinkage void __init debug_cons_nputs(struct console *c, const char *s, unsigned int n); |
| 20 | |
| 21 | static struct console early_console_instance = { |
| 22 | .name = "debug", |
| 23 | .flags = CON_PRINTBUFFER | CON_BOOT, |
| 24 | .index = -1 |
| 25 | }; |
| 26 | |
| 27 | static int __init setup_early_printk(char *buf) |
| 28 | { |
| 29 | if (early_console || buf) |
| 30 | return 0; |
| 31 | |
| 32 | if (MACH_IS_MVME147) |
| 33 | early_console_instance.write = mvme147_scc_write; |
| 34 | else if (MACH_IS_MVME16x) |
| 35 | early_console_instance.write = mvme16x_cons_write; |
| 36 | else |
| 37 | early_console_instance.write = debug_cons_nputs; |
| 38 | early_console = &early_console_instance; |
| 39 | register_console(early_console); |
| 40 | |
| 41 | return 0; |
| 42 | } |
| 43 | early_param("earlyprintk", setup_early_printk); |
| 44 | |
| 45 | static int __init unregister_early_console(void) |
| 46 | { |
| 47 | /* |
| 48 | * debug_cons_nputs() defined in arch/m68k/kernel/head.S cannot be |
| 49 | * called after init sections are discarded (for platforms that use it). |
| 50 | */ |
| 51 | if (early_console && early_console->write == debug_cons_nputs) |
| 52 | return unregister_console(early_console); |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | late_initcall(unregister_early_console); |
| 57 |