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 int i; 29 30 va_start(args, fmt); 31 32#ifdef CONFIG_KGDB 33 ppbuf[0] = 'O'; 34 i = vsprintf(ppbuf + 1, fmt, args) + 1; 35#else 36 i = vsprintf(ppbuf, fmt, args); 37#endif 38 39 bptr = ppbuf; 40 41#ifdef CONFIG_KGDB 42 if (kgdb_initialized) { 43 pr_info("kgdb_initialized = %d\n", kgdb_initialized); 44 putpacket(bptr, 1); 45 } else 46#else 47 while((ch = *(bptr++)) != 0) { 48 if(ch == '\n') 49 prom_putchar('\r'); 50 51 prom_putchar(ch); 52 } 53#endif 54 va_end(args); 55 return; 56} 57