usr/src/sys/hp300/stand/boot.c

/*-
 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 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.
 *
 *      @(#)boot.c      7.4 (Berkeley) 5/5/91
 */

#include <sys/param.h>
#include <sys/reboot.h>
#include <a.out.h>
#include "saio.h"

#ifndef INSECURE
#include "sys/stat.h"
struct stat sb;
#endif
                                        /* XXX -- see sys/reboot.h */
#define B_MAKEDEV(a,u,p,t) \
        (((a) << B_ADAPTORSHIFT) | ((u) << B_UNITSHIFT) | \
         ((p) << B_PARTITIONSHIFT) | ((t) << B_TYPESHIFT))

/*
 * Boot program... arguments in `devtype' and `howto' determine
 * whether boot stops to ask for system name and which device
 * boot comes from.
 */

/* Types in `devtype' specifying major device */
char    devname[][2] = {
        '\0', '\0',     /* 0 = ct */
        '\0', '\0',     /* 1 = fd */
         'r',  'd',     /* 2 = rd */
        '\0', '\0',     /* 3 = sw */
         's',  'd',     /* 4 = sd */
};
#define MAXTYPE (sizeof(devname) / sizeof(devname[0]))

char line[100];

int     retry = 0;
extern  char *lowram;
extern  int noconsole;
extern  int howto, devtype;

#define MSUS (0xfffffedc)

char rom2mdev[] = {
        0,      /*  0 - none */
        0,      /*  1 - none */
        0,      /*  2 - none */
        0,      /*  3 - none */
        0,      /*  4 - none */
        0,      /*  5 - none */
        0,      /*  6 - none */
        0,      /*  7 - none */
        0,      /*  8 - none */
        0,      /*  9 - none */
        0,      /* 10 - none */
        0,      /* 11 - none */
        0,      /* 12 - none */
        0,      /* 13 - none */
        4,      /* 14 - SCSI disk */
        0,      /* 15 - none */
        2,      /* 16 - CS/80 device on HPIB */
        2,      /* 17 - CS/80 device on HPIB */
        0,      /* 18 - none */
        0,      /* 19 - none */
        0,      /* 20 - none */
        0,      /* 21 - none */
        0,      /* 22 - none */
        0,      /* 23 - none */
        0,      /* 24 - none */
        0,      /* 25 - none */
        0,      /* 26 - none */
        0,      /* 27 - none */
        0,      /* 28 - none */
        0,      /* 29 - none */
        0,      /* 30 - none */
        0,      /* 31 - none */
};

main()
{
        register type, part, unit, io;
        register char *cp;

        printf("\nBoot\n");
#ifdef JUSTASK
        howto = RB_ASKNAME|RB_SINGLE;
#else
        type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
        unit = (devtype >> B_UNITSHIFT) & B_UNITMASK;
        unit += 8 * ((devtype >> B_ADAPTORSHIFT) & B_ADAPTORMASK);
        part = (devtype >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
        if ((howto & RB_ASKNAME) == 0) {
                if ((devtype & B_MAGICMASK) != B_DEVMAGIC) {
                        /*
                         * we have to map the ROM device type codes
                         * to Unix major device numbers.
                         */
                        type = rom2mdev[*(char *)MSUS & 0x1f];
                        devtype = (devtype &~ (B_TYPEMASK << B_TYPESHIFT))
                                  | (type << B_TYPESHIFT);
                }
                if (type >= 0 && type <= MAXTYPE && devname[type][0]) {
                        cp = line;
                        *cp++ = devname[type][0];
                        *cp++ = devname[type][1];
                        *cp++ = '(';
                        if (unit >= 10)
                                *cp++ = unit / 10 + '0';
                        *cp++ = unit % 10 + '0';
                        *cp++ = ',';
                        *cp++ = part + '0';
                        *cp++ = ')';
                        strcpy(cp, UNIX);
                } else
                        howto = RB_SINGLE|RB_ASKNAME;
        }
#endif
        for (;;) {
                if (!noconsole && (howto & RB_ASKNAME)) {
                        printf(": ");
                        gets(line);
                } else
                        printf(": %s\n", line);
                io = open(line, 0);
                if (io >= 0) {
#ifndef INSECURE
                        (void) fstat(io, &sb);
                        if (sb.st_uid || (sb.st_mode & 2)) {
                                printf("non-secure file, will not load\n");
                                howto = RB_SINGLE|RB_ASKNAME;
                                continue;
                        }
#endif
                        if (howto & RB_ASKNAME) {
                                /*
                                 * Build up devtype register to pass on to
                                 * booted program.
                                 */
                                cp = line;
                                for (type = 0; type <= MAXTYPE; type++)
                                        if ((devname[type][0] == cp[0]) &&
                                            (devname[type][1] == cp[1]))
                                                break;
                                if (type <= MAXTYPE) {
                                        cp += 3;
                                        unit = *cp++ - '0';
                                        if (*cp >= '0' && *cp <= '9')
                                                unit = unit * 10 + *cp++ - '0';
                                        cp++;
                                        part = atol(cp);
                                        devtype = B_MAKEDEV(unit >> 3, unit & 7, part, type);
                                }
                        }
                        devtype |= B_DEVMAGIC;
                        copyunix(howto, devtype, io);
                        close(io);
                        howto = RB_SINGLE|RB_ASKNAME;
                }
        bad:
                if (++retry > 2)
                        howto = RB_SINGLE|RB_ASKNAME;
        }
}

/*ARGSUSED*/
copyunix(howto, devtype, io)
        register howto;         /* d7 contains boot flags */
        register devtype;       /* d6 contains boot device */
        register io;
{
        struct exec x;
        register int i;
        register char *load;    /* a5 contains load addr for unix */
        register char *addr;

        i = read(io, (char *)&x, sizeof x);
        if (i != sizeof x ||
            (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
                _stop("Bad format\n");
        printf("%d", x.a_text);
        if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
                goto shread;
        load = addr = lowram;
        if (read(io, (char *)addr, x.a_text) != x.a_text)
                goto shread;
        addr += x.a_text;
        if (x.a_magic == 0413 || x.a_magic == 0410)
                while ((int)addr & CLOFSET)
                        *addr++ = 0;
        printf("+%d", x.a_data);
        if (read(io, addr, x.a_data) != x.a_data)
                goto shread;
        addr += x.a_data;
        printf("+%d", x.a_bss);
        x.a_bss += 128*512;     /* slop */
        for (i = 0; i < x.a_bss; i++)
                *addr++ = 0;
        x.a_entry += (int)lowram;
        printf(" start 0x%x\n", x.a_entry);
#ifdef __GNUC__
        asm("   movl %0,d7" : : "m" (howto));
        asm("   movl %0,d6" : : "m" (devtype));
        asm("   movl %0,a5" : : "a" (load));
#endif
        (*((int (*)()) x.a_entry))();
        exit();
shread:
        _stop("Short read\n");
}