/*-
 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>

#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <sys/boot.h>
#include "bootstrap.h"
#include "libi386.h"
#include "btxv86.h"

int
bi_getboothowto(char *kargs)
{
    char        *cp;
    char        *curpos, *next, *string;
    int         howto;
    int         active;
    int         i;
    int         vidconsole;

    /* Parse kargs */
    howto = 0;
    if (kargs  != NULL) {
        cp = kargs;
        active = 0;
        while (*cp != 0) {
            if (!active && (*cp == '-')) {
                active = 1;
            } else if (active)
                switch (*cp) {
                case 'a':
                    howto |= RB_ASKNAME;
                    break;
                case 'C':
                    howto |= RB_CDROM;
                    break;
                case 'd':
                    howto |= RB_KDB;
                    break;
                case 'D':
                    howto |= RB_MULTIPLE;
                    break;
                case 'm':
                    howto |= RB_MUTE;
                    break;
                case 'g':
                    howto |= RB_GDB;
                    break;
                case 'h':
                    howto |= RB_SERIAL;
                    break;
                case 'p':
                    howto |= RB_PAUSE;
                    break;
                case 'r':
                    howto |= RB_DFLTROOT;
                    break;
                case 's':
                    howto |= RB_SINGLE;
                    break;
                case 'v':
                    howto |= RB_VERBOSE;
                    break;
                default:
                    active = 0;
                    break;
                }
            cp++;
        }
    }
    /* get equivalents from the environment */
    for (i = 0; howto_names[i].ev != NULL; i++)
        if (getenv(howto_names[i].ev) != NULL)
            howto |= howto_names[i].mask;

    /* Enable selected consoles */
    string = next = strdup(getenv("console"));
    vidconsole = 0;
    while (next != NULL) {
        curpos = strsep(&next, " ,");
        if (*curpos == '\0')
                continue;
        if (!strcmp(curpos, "text"))
            vidconsole = 1;
        else if (!strcmp(curpos, "ttya"))
            howto |= RB_SERIAL;
        else if (!strcmp(curpos, "ttyb"))
            howto |= RB_SERIAL;
        else if (!strcmp(curpos, "ttyc"))
            howto |= RB_SERIAL;
        else if (!strcmp(curpos, "ttyd"))
            howto |= RB_SERIAL;
        else if (!strcmp(curpos, "null"))
            howto |= RB_MUTE;
    }

    if (vidconsole && (howto & RB_SERIAL))
        howto |= RB_MULTIPLE;

    /*
     * XXX: Note that until the kernel is ready to respect multiple consoles
     * for the boot messages, the first named console is the primary console
     */
    if (!strcmp(string, "text"))
        howto &= ~RB_SERIAL;

    free(string);

    return(howto);
}

void
bi_setboothowto(int howto)
{
    int         i;

    for (i = 0; howto_names[i].ev != NULL; i++)
        if (howto & howto_names[i].mask)
            setenv(howto_names[i].ev, "YES", 1);
}

/*
 * Copy the environment into the load area starting at (addr).
 * Each variable is formatted as <name>=<value>, with a single nul
 * separating each variable, and a double nul terminating the environment.
 */
vm_offset_t
bi_copyenv(vm_offset_t addr)
{
    struct env_var      *ep;

    /* traverse the environment */
    for (ep = environ; ep != NULL; ep = ep->ev_next) {
        i386_copyin(ep->ev_name, addr, strlen(ep->ev_name));
        addr += strlen(ep->ev_name);
        i386_copyin("=", addr, 1);
        addr++;
        if (ep->ev_value != NULL) {
            i386_copyin(ep->ev_value, addr, strlen(ep->ev_value));
            addr += strlen(ep->ev_value);
        }
        i386_copyin("", addr, 1);
        addr++;
    }
    i386_copyin("", addr, 1);
    addr++;
    return(addr);
}