/*      $OpenBSD: cmd_i386.c,v 1.16 2025/09/17 20:23:58 deraadt Exp $   */

/*
 * Copyright (c) 1997-1999 Michael Shalayeff
 * Copyright (c) 1997 Tobias Weingartner
 * 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 ``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 REGENTS 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/param.h>
#include <sys/reboot.h>
#include <machine/biosvar.h>
#include <sys/disklabel.h>
#include "disk.h"
#include "biosdev.h"
#include "libsa.h"
#include <cmd.h>

extern const char version[];

int Xboot(void);
int Xcomaddr(void);
int Xdiskinfo(void);
int Xmemory(void);
int Xregs(void);

/* From gidt.S */
int bootbuf(void *, int);

const struct cmd_table cmd_machine[] = {
        { "boot",       CMDT_CMD, Xboot },
        { "comaddr",    CMDT_CMD, Xcomaddr },
        { "diskinfo",   CMDT_CMD, Xdiskinfo },
        { "memory",     CMDT_CMD, Xmemory },
#ifdef DEBUG
        { "regs",       CMDT_CMD, Xregs },
#endif
        { NULL, 0 }
};

int
Xdiskinfo(void)
{
        dump_diskinfo();
        return 0;
}

#ifdef DEBUG
int
Xregs(void)
{
        DUMP_REGS;
        return 0;
}
#endif

int
Xboot(void)
{
        printf("Not supported yet\n");
        int dev, part, st;
        struct diskinfo *dip;
        char buf[DEV_BSIZE], *dest = (void *)BOOTBIOS_ADDR;

        if (cmd.argc != 2) {
                printf("machine boot {fd,hd}<0123>[abcd]\n");
                printf("Where [0123] is the disk number,"
                    " and [abcd] is the partition.\n");
                return 0;
        }

        /* Check arg */
        if (cmd.argv[1][0] != 'f' && cmd.argv[1][0] != 'h')
                goto bad;
        if (cmd.argv[1][1] != 'd')
                goto bad;
        if (cmd.argv[1][2] < '0' || cmd.argv[1][2] > '3')
                goto bad;
        if ((cmd.argv[1][3] < 'a' || cmd.argv[1][3] > 'd') &&
            cmd.argv[1][3] != '\0')
                goto bad;

        printf("Booting from %s ", cmd.argv[1]);

        dev = (cmd.argv[1][0] == 'h')?0x80:0;
        dev += (cmd.argv[1][2] - '0');
        part = DL_PARTNAME2NUM(cmd.argv[1][3]);

        if (part >= 0)
                printf("[%x,%d]\n", dev, part);
        else
                printf("[%x]\n", dev);

        /* Read boot sector from device */
        dip = dklookup(dev);
        st = dip->diskio(F_READ, dip, 0, 1, buf);
        if (st)
                goto bad;

        /* Frob boot flag in buffer from HD */
        if ((dev & 0x80) && (part >= 0)) {
                int i, j;

                for (i = 0, j = DOSPARTOFF; i < 4; i++, j += 16)
                        if (part == i)
                                buf[j] |= 0x80;
                        else
                                buf[j] &= ~0x80;
        }

        /* Load %dl, ljmp */
        bcopy(buf, dest, DEV_BSIZE);
        bootbuf(dest, dev);

bad:
        printf("Invalid device!\n");
        return 0;
}

int
Xmemory(void)
{
        if (cmd.argc >= 2) {
                int i;
                /* parse the memory specs */

                for (i = 1; i < cmd.argc; i++) {
                        char *p;
                        long long addr, size;

                        p = cmd.argv[i];

                        size = strtoll(p + 1, &p, 0);
                        /* Size the size */
                        switch (*p) {
                                case 'G':
                                case 'g':
                                        size *= 1024;
                                case 'M':
                                case 'm':
                                        size *= 1024;
                                case 'K':
                                case 'k':
                                        size *= 1024;
                                        p++;
                        }

                        /* Handle (possibly non-existent) address part */
                        switch (*p) {
                                case '@':
                                        addr = strtoll(p + 1, NULL, 0);
                                        break;

                                /* Adjust address if we don't need it */
                                default:
                                        if (cmd.argv[i][0] == '=')
                                                addr = -1;
                                        else
                                                addr = 0;
                        }

                        if (addr == 0 || size == 0) {
                                printf("bad language\n");
                                return 0;
                        } else {
                                switch (cmd.argv[i][0]) {
                                case '-':
                                        mem_delete(addr, addr + size);
                                        break;
                                case '+':
                                        mem_add(addr, addr + size);
                                        break;
                                case '=':
                                        mem_limit(size);
                                        break;
                                default :
                                        printf("bad OP\n");
                                        return 0;
                                }
                        }
                }
        }

        dump_biosmem(NULL);

        return 0;
}

int
Xcomaddr(void)
{
        extern int com_addr;

        if (cmd.argc >= 2)
                com_addr = (int)strtol(cmd.argv[1], NULL, 0);

        return 0;
}