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
18extern int kgdb_initialized;
19#endif
20
21static char ppbuf[1024];
22
23void
24prom_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