2 * printf.c: Internal prom library printf facility.
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com)
7 * We used to warn all over the code: DO NOT USE prom_printf(),
8 * and yet people do. Anton's banking code was outputting banks
9 * with prom_printf for most of the 2.4 lifetime. Since an effective
10 * stick is not available, we deployed a carrot: an early printk
11 * through PROM by means of -p boot option. This ought to fix it.
12 * USE printk; if you need, deploy -p.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
18 #include <asm/openprom.h>
19 #include <asm/oplib.h>
21 static char ppbuf[1024];
24 prom_write(const char *buf, unsigned int n)
30 if ((ch = *buf++) == '\n')
37 prom_printf(char *fmt, ...)
43 i = vscnprintf(ppbuf, sizeof(ppbuf), fmt, args);
48 EXPORT_SYMBOL(prom_printf);