// SPDX-License-Identifier: GPL-2.0
/*
 * printf.c:  Internal prom library printf facility.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

/* This routine is internal to the prom library, no one else should know
 * about or use it!  It's simple and smelly anyway....
 */

#include <linux/kernel.h>

#include <asm/openprom.h>
#include <asm/oplib.h>

#ifdef CONFIG_KGDB
extern int kgdb_initialized;
#endif

static char ppbuf[1024];

void
prom_printf(char *fmt, ...)
{
        va_list args;
        char ch, *bptr;

        va_start(args, fmt);

#ifdef CONFIG_KGDB
        ppbuf[0] = 'O';
        vsnprintf(ppbuf + 1, sizeof(ppbuf) - 1, fmt, args);
#else
        vsnprintf(ppbuf, sizeof(ppbuf), fmt, args);
#endif

        bptr = ppbuf;

#ifdef CONFIG_KGDB
        if (kgdb_initialized) {
                pr_info("kgdb_initialized = %d\n", kgdb_initialized);
                putpacket(bptr, 1);
        } else
#else
        while((ch = *(bptr++)) != 0) {
                if(ch == '\n')
                        prom_putchar('\r');

                prom_putchar(ch);
        }
#endif
        va_end(args);
        return;
}