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// 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;
}
}
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