/*
 * 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 */
                }
        }
}