1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * printf.c: Internal prom library printf facility.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8 /* This routine is internal to the prom library, no one else should know
9 * about or use it! It's simple and smelly anyway....
10 */
11
12 #include <linux/kernel.h>
13
14 #include <asm/openprom.h>
15 #include <asm/oplib.h>
16
17 #ifdef CONFIG_KGDB
18 extern int kgdb_initialized;
19 #endif
20
21 static char ppbuf[1024];
22
23 void
24 prom_printf(char *fmt, ...)
25 {
26 va_list args;
27 char ch, *bptr;
28
29 va_start(args, fmt);
30
31 #ifdef CONFIG_KGDB
32 ppbuf[0] = 'O';
33 vsprintf(ppbuf + 1, fmt, args) + 1;
34 #else
35 vsprintf(ppbuf, fmt, args);
36 #endif
37
38 bptr = ppbuf;
39
40 #ifdef CONFIG_KGDB
41 if (kgdb_initialized) {
42 pr_info("kgdb_initialized = %d\n", kgdb_initialized);
43 putpacket(bptr, 1);
44 } else
45 #else
46 while((ch = *(bptr++)) != 0) {
47 if(ch == '\n')
48 prom_putchar('\r');
49
50 prom_putchar(ch);
51 }
52 #endif
53 va_end(args);
54 return;
55 }
56
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