// SPDX-License-Identifier: GPL-2.0
/* console.c: Routines that deal with sending and receiving IO
 *            to/from the current console device using the PROM.
 *
 * Copyright (C) 1995 David S. Miller (davem@davemloft.net)
 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <linux/string.h>

static int __prom_console_write_buf(const char *buf, int len)
{
        unsigned long args[7];
        int ret;

        args[0] = (unsigned long) "write";
        args[1] = 3;
        args[2] = 1;
        args[3] = (unsigned int) prom_stdout;
        args[4] = (unsigned long) buf;
        args[5] = (unsigned int) len;
        args[6] = (unsigned long) -1;

        p1275_cmd_direct(args);

        ret = (int) args[6];
        if (ret < 0)
                return -1;
        return ret;
}

void prom_console_write_buf(const char *buf, int len)
{
        while (len) {
                int n = __prom_console_write_buf(buf, len);
                if (n < 0)
                        continue;
                len -= n;
                buf += len;
        }
}