bootlst/common/sasubr.c

	sasubr.c revision e7cbe64f7a72dae5cb44f100db60ca88f3313c65
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/sysmacros.h>
#include <sys/salib.h>
#include <sys/promif.h>

#define MINALLOC    8
#define TOPMEM      ((caddr_t)0x1000000)

extern caddr_t _end;
extern struct boot_fs_ops promfs_ops;

struct boot_fs_ops *boot_fsw[] = {
    &promfs_ops,
};
int boot_nfsw = sizeof (boot_fsw) / sizeof (boot_fsw[0]);

void *
bkmem_alloc(size_t s)
{
    static caddr_t next;
    caddr_t ret;

    if (next == NULL)
        next = (caddr_t)roundup((uintptr_t)&_end, MINALLOC);
    ret = next;
    next += roundup(s, MINALLOC);
    if (next >= TOPMEM)
        prom_panic("out of memory");
    return (ret);
}

/*ARGSUSED*/
void
bkmem_free(void *p, size_t s)
{
}

int
cons_getchar(void)
{
    register int c;

    while ((c = prom_mayget()) == -1)
        ;
    if (c == '\r') {
        prom_putchar(c);
        c = '\n';
    }
    if (c == 0177 || c == '\b') {
        prom_putchar('\b');
        prom_putchar(' ');
        c = '\b';
    }
    prom_putchar(c);
    return (c);
}

char *
cons_gets(char *buf, int n)
{
    char *lp;
    char *limit;
    int c;

    lp = buf;
    limit = &buf[n - 1];
    for (;;) {
        c = cons_getchar() & 0177;
        switch (c) {
        case '\n':
        case '\r':
            *lp = '\0';
            return (buf);
        case '\b':
            if (lp > buf)
                lp--;
            continue;
        case 'u'&037:           /* ^U */
            lp = buf;
            prom_putchar('\r');
            prom_putchar('\n');
            continue;
        case 0:
            continue;
        default:
            if (lp < limit)
                *lp++ = (char)c;
            else
                prom_putchar('\a'); /* bell */
        }
    }
}