diff options
Diffstat (limited to 'arch/sparc/prom/printf_64.c')
-rw-r--r-- | arch/sparc/prom/printf_64.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/sparc/prom/printf_64.c b/arch/sparc/prom/printf_64.c new file mode 100644 index 000000000000..660943ee4c2a --- /dev/null +++ b/arch/sparc/prom/printf_64.c @@ -0,0 +1,47 @@ +/* + * 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 <linux/kernel.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> + +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); +} |