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 "../mvme16x/mvme16x.h" |
17 | |
18 | asmlinkage void __init debug_cons_nputs(const char *s, unsigned n); |
19 | |
20 | static void __ref debug_cons_write(struct console *c, |
21 | const char *s, unsigned n) |
22 | { |
23 | #if !(defined(CONFIG_SUN3) || defined(CONFIG_M68000) || \ |
24 | defined(CONFIG_COLDFIRE)) |
25 | if (MACH_IS_MVME16x) |
26 | mvme16x_cons_write(co: c, str: s, count: n); |
27 | else |
28 | debug_cons_nputs(s, n); |
29 | #endif |
30 | } |
31 | |
32 | static struct console early_console_instance = { |
33 | .name = "debug" , |
34 | .write = debug_cons_write, |
35 | .flags = CON_PRINTBUFFER | CON_BOOT, |
36 | .index = -1 |
37 | }; |
38 | |
39 | static int __init setup_early_printk(char *buf) |
40 | { |
41 | if (early_console || buf) |
42 | return 0; |
43 | |
44 | early_console = &early_console_instance; |
45 | register_console(early_console); |
46 | |
47 | return 0; |
48 | } |
49 | early_param("earlyprintk" , setup_early_printk); |
50 | |
51 | /* |
52 | * debug_cons_nputs() defined in arch/m68k/kernel/head.S cannot be called |
53 | * after init sections are discarded (for platforms that use it). |
54 | */ |
55 | #if !(defined(CONFIG_SUN3) || defined(CONFIG_M68000) || \ |
56 | defined(CONFIG_COLDFIRE)) |
57 | |
58 | static int __init unregister_early_console(void) |
59 | { |
60 | if (!early_console || MACH_IS_MVME16x) |
61 | return 0; |
62 | |
63 | return unregister_console(early_console); |
64 | } |
65 | late_initcall(unregister_early_console); |
66 | |
67 | #endif |
68 | |