intel/promif/prom_putchar.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/promif.h>
#include <sys/promimpl.h>
#include <sys/bootsvcs.h>

/*ARGSUSED*/
int
prom_mayput(char c)
{
    prom_putchar(c);
    return (1);
}

void
prom_putchar(char c)
{
    static int bhcharpos = 0;
    promif_owrap_t *ow;

    ow = promif_preout();
    switch (c) {
    case '\t':
        do {
            BSVC_PUTCHAR(SYSP, ' ');
        } while (++bhcharpos % 8);
        break;
    case '\n':
    case '\r':
        bhcharpos = 0;
        BSVC_PUTCHAR(SYSP, c);
        break;
    case '\b':
        if (bhcharpos)
            bhcharpos--;
        BSVC_PUTCHAR(SYSP, c);
        break;
    default:
        bhcharpos++;
        BSVC_PUTCHAR(SYSP, c);
        break;
    }
    promif_postout(ow);
}

void
prom_writestr(const char *s, size_t n)
{
    while (n-- != 0)
        prom_putchar(*s++);
}