1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * Copyright IBM Corp. 2017 !! 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
4 */ 7 */
5 8
6 #include <linux/console.h> <<
7 #include <linux/kernel.h> 9 #include <linux/kernel.h>
>> 10 #include <linux/console.h>
8 #include <linux/init.h> 11 #include <linux/init.h>
>> 12 #include <linux/string.h>
9 #include <asm/setup.h> 13 #include <asm/setup.h>
10 #include <asm/sclp.h> <<
11 14
12 static void sclp_early_write(struct console *c !! 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)
13 { 22 {
14 __sclp_early_printk(s, len); !! 23 #if !(defined(CONFIG_SUN3) || defined(CONFIG_M68000) || \
>> 24 defined(CONFIG_COLDFIRE))
>> 25 if (MACH_IS_MVME16x)
>> 26 mvme16x_cons_write(c, s, n);
>> 27 else
>> 28 debug_cons_nputs(s, n);
>> 29 #endif
15 } 30 }
16 31
17 static struct console sclp_early_console = { !! 32 static struct console early_console_instance = {
18 .name = "earlysclp", !! 33 .name = "debug",
19 .write = sclp_early_write, !! 34 .write = debug_cons_write,
20 .flags = CON_PRINTBUFFER | CON_BOOT, 35 .flags = CON_PRINTBUFFER | CON_BOOT,
21 .index = -1, !! 36 .index = -1
22 }; 37 };
23 38
24 void __init register_early_console(void) !! 39 static int __init setup_early_printk(char *buf)
25 { 40 {
26 if (early_console) !! 41 if (early_console || buf)
27 return; !! 42 return 0;
28 if (!sclp.has_linemode && !sclp.has_vt !! 43
29 return; !! 44 early_console = &early_console_instance;
30 early_console = &sclp_early_console; <<
31 register_console(early_console); 45 register_console(early_console);
>> 46
>> 47 return 0;
32 } 48 }
>> 49 early_param("earlyprintk", setup_early_printk);
33 50
34 static int __init setup_early_printk(char *buf !! 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)
35 { 59 {
36 if (early_console) !! 60 if (!early_console || MACH_IS_MVME16x)
37 return 0; 61 return 0;
38 /* Accept only "earlyprintk" and "earl !! 62
39 if (buf && !str_has_prefix(buf, "sclp" !! 63 return unregister_console(early_console);
40 return 0; <<
41 register_early_console(); <<
42 return 0; <<
43 } 64 }
44 early_param("earlyprintk", setup_early_printk) !! 65 late_initcall(unregister_early_console);
>> 66
>> 67 #endif
45 68
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