/* * printf.c: Internal prom library printf facility. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com) * * We used to warn all over the code: DO NOT USE prom_printf(), * and yet people do. Anton's banking code was outputting banks * with prom_printf for most of the 2.4 lifetime. Since an effective * stick is not available, we deployed a carrot: an early printk * through PROM by means of -p boot option. This ought to fix it. * USE printk; if you need, deploy -p. */ #include #include #include static char ppbuf[1024]; void prom_write(const char *buf, unsigned int n) { char ch; while (n != 0) { --n; if ((ch = *buf++) == '\n') prom_putchar('\r'); prom_putchar(ch); } } void prom_printf(const char *fmt, ...) { va_list args; int i; va_start(args, fmt); i = vscnprintf(ppbuf, sizeof(ppbuf), fmt, args); va_end(args); prom_write(ppbuf, i); }
