console_64.c

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/* 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 ([email protected])
 * Copyright (C) 1996,1997 Jakub Jelinek ([email protected])
 */

#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;
    }
}