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Annotation of Net2/arch/hp300/stand/boot.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)boot.c      7.4 (Berkeley) 5/5/91
        !            34:  */
        !            35: 
        !            36: #include <sys/param.h>
        !            37: #include <sys/reboot.h>
        !            38: #include <a.out.h>
        !            39: #include "saio.h"
        !            40: 
        !            41: #ifndef INSECURE
        !            42: #include "sys/stat.h"
        !            43: struct stat sb;
        !            44: #endif
        !            45:                                        /* XXX -- see sys/reboot.h */
        !            46: #define B_MAKEDEV(a,u,p,t) \
        !            47:        (((a) << B_ADAPTORSHIFT) | ((u) << B_UNITSHIFT) | \
        !            48:         ((p) << B_PARTITIONSHIFT) | ((t) << B_TYPESHIFT))
        !            49: 
        !            50: /*
        !            51:  * Boot program... arguments in `devtype' and `howto' determine
        !            52:  * whether boot stops to ask for system name and which device
        !            53:  * boot comes from.
        !            54:  */
        !            55: 
        !            56: /* Types in `devtype' specifying major device */
        !            57: char   devname[][2] = {
        !            58:        '\0', '\0',     /* 0 = ct */
        !            59:        '\0', '\0',     /* 1 = fd */
        !            60:         'r',  'd',     /* 2 = rd */
        !            61:        '\0', '\0',     /* 3 = sw */
        !            62:         's',  'd',     /* 4 = sd */
        !            63: };
        !            64: #define        MAXTYPE (sizeof(devname) / sizeof(devname[0]))
        !            65: 
        !            66: char line[100];
        !            67: 
        !            68: int    retry = 0;
        !            69: extern char *lowram;
        !            70: extern int noconsole;
        !            71: extern int howto, devtype;
        !            72: 
        !            73: #define        MSUS (0xfffffedc)
        !            74: 
        !            75: char rom2mdev[] = {
        !            76:        0,      /*  0 - none */
        !            77:        0,      /*  1 - none */
        !            78:        0,      /*  2 - none */
        !            79:        0,      /*  3 - none */
        !            80:        0,      /*  4 - none */
        !            81:        0,      /*  5 - none */
        !            82:        0,      /*  6 - none */
        !            83:        0,      /*  7 - none */
        !            84:        0,      /*  8 - none */
        !            85:        0,      /*  9 - none */
        !            86:        0,      /* 10 - none */
        !            87:        0,      /* 11 - none */
        !            88:        0,      /* 12 - none */
        !            89:        0,      /* 13 - none */
        !            90:        4,      /* 14 - SCSI disk */
        !            91:        0,      /* 15 - none */
        !            92:        2,      /* 16 - CS/80 device on HPIB */
        !            93:        2,      /* 17 - CS/80 device on HPIB */
        !            94:        0,      /* 18 - none */
        !            95:        0,      /* 19 - none */
        !            96:        0,      /* 20 - none */
        !            97:        0,      /* 21 - none */
        !            98:        0,      /* 22 - none */
        !            99:        0,      /* 23 - none */
        !           100:        0,      /* 24 - none */
        !           101:        0,      /* 25 - none */
        !           102:        0,      /* 26 - none */
        !           103:        0,      /* 27 - none */
        !           104:        0,      /* 28 - none */
        !           105:        0,      /* 29 - none */
        !           106:        0,      /* 30 - none */
        !           107:        0,      /* 31 - none */
        !           108: };
        !           109: 
        !           110: main()
        !           111: {
        !           112:        register type, part, unit, io;
        !           113:        register char *cp;
        !           114: 
        !           115:        printf("\nBoot\n");
        !           116: #ifdef JUSTASK
        !           117:        howto = RB_ASKNAME|RB_SINGLE;
        !           118: #else
        !           119:        type = (devtype >> B_TYPESHIFT) & B_TYPEMASK;
        !           120:        unit = (devtype >> B_UNITSHIFT) & B_UNITMASK;
        !           121:        unit += 8 * ((devtype >> B_ADAPTORSHIFT) & B_ADAPTORMASK);
        !           122:        part = (devtype >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
        !           123:        if ((howto & RB_ASKNAME) == 0) {
        !           124:                if ((devtype & B_MAGICMASK) != B_DEVMAGIC) {
        !           125:                        /*
        !           126:                         * we have to map the ROM device type codes
        !           127:                         * to Unix major device numbers.
        !           128:                         */
        !           129:                        type = rom2mdev[*(char *)MSUS & 0x1f];
        !           130:                        devtype = (devtype &~ (B_TYPEMASK << B_TYPESHIFT))
        !           131:                                  | (type << B_TYPESHIFT);
        !           132:                }
        !           133:                if (type >= 0 && type <= MAXTYPE && devname[type][0]) {
        !           134:                        cp = line;
        !           135:                        *cp++ = devname[type][0];
        !           136:                        *cp++ = devname[type][1];
        !           137:                        *cp++ = '(';
        !           138:                        if (unit >= 10)
        !           139:                                *cp++ = unit / 10 + '0';
        !           140:                        *cp++ = unit % 10 + '0';
        !           141:                        *cp++ = ',';
        !           142:                        *cp++ = part + '0';
        !           143:                        *cp++ = ')';
        !           144:                        strcpy(cp, UNIX);
        !           145:                } else
        !           146:                        howto = RB_SINGLE|RB_ASKNAME;
        !           147:        }
        !           148: #endif
        !           149:        for (;;) {
        !           150:                if (!noconsole && (howto & RB_ASKNAME)) {
        !           151:                        printf(": ");
        !           152:                        gets(line);
        !           153:                } else
        !           154:                        printf(": %s\n", line);
        !           155:                io = open(line, 0);
        !           156:                if (io >= 0) {
        !           157: #ifndef INSECURE
        !           158:                        (void) fstat(io, &sb);
        !           159:                        if (sb.st_uid || (sb.st_mode & 2)) {
        !           160:                                printf("non-secure file, will not load\n");
        !           161:                                howto = RB_SINGLE|RB_ASKNAME;
        !           162:                                continue;
        !           163:                        }
        !           164: #endif
        !           165:                        if (howto & RB_ASKNAME) {
        !           166:                                /*
        !           167:                                 * Build up devtype register to pass on to
        !           168:                                 * booted program.
        !           169:                                 */ 
        !           170:                                cp = line;
        !           171:                                for (type = 0; type <= MAXTYPE; type++)
        !           172:                                        if ((devname[type][0] == cp[0]) && 
        !           173:                                            (devname[type][1] == cp[1]))
        !           174:                                                break;
        !           175:                                if (type <= MAXTYPE) {
        !           176:                                        cp += 3;
        !           177:                                        unit = *cp++ - '0';
        !           178:                                        if (*cp >= '0' && *cp <= '9')
        !           179:                                                unit = unit * 10 + *cp++ - '0';
        !           180:                                        cp++;
        !           181:                                        part = atol(cp);
        !           182:                                        devtype = B_MAKEDEV(unit >> 3, unit & 7, part, type);
        !           183:                                }
        !           184:                        }
        !           185:                        devtype |= B_DEVMAGIC;
        !           186:                        copyunix(howto, devtype, io);
        !           187:                        close(io);
        !           188:                        howto = RB_SINGLE|RB_ASKNAME;
        !           189:                }
        !           190:        bad:
        !           191:                if (++retry > 2)
        !           192:                        howto = RB_SINGLE|RB_ASKNAME;
        !           193:        }
        !           194: }
        !           195: 
        !           196: /*ARGSUSED*/
        !           197: copyunix(howto, devtype, io)
        !           198:        register howto;         /* d7 contains boot flags */
        !           199:        register devtype;       /* d6 contains boot device */
        !           200:        register io;
        !           201: {
        !           202:        struct exec x;
        !           203:        register int i;
        !           204:        register char *load;    /* a5 contains load addr for unix */
        !           205:        register char *addr;
        !           206: 
        !           207:        i = read(io, (char *)&x, sizeof x);
        !           208:        if (i != sizeof x ||
        !           209:            (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
        !           210:                _stop("Bad format\n");
        !           211:        printf("%d", x.a_text);
        !           212:        if (x.a_magic == 0413 && lseek(io, 0x400, 0) == -1)
        !           213:                goto shread;
        !           214:        load = addr = lowram;
        !           215:        if (read(io, (char *)addr, x.a_text) != x.a_text)
        !           216:                goto shread;
        !           217:        addr += x.a_text;
        !           218:        if (x.a_magic == 0413 || x.a_magic == 0410)
        !           219:                while ((int)addr & CLOFSET)
        !           220:                        *addr++ = 0;
        !           221:        printf("+%d", x.a_data);
        !           222:        if (read(io, addr, x.a_data) != x.a_data)
        !           223:                goto shread;
        !           224:        addr += x.a_data;
        !           225:        printf("+%d", x.a_bss);
        !           226:        x.a_bss += 128*512;     /* slop */
        !           227:        for (i = 0; i < x.a_bss; i++)
        !           228:                *addr++ = 0;
        !           229:        x.a_entry += (int)lowram;
        !           230:        printf(" start 0x%x\n", x.a_entry);
        !           231: #ifdef __GNUC__
        !           232:        asm("   movl %0,d7" : : "m" (howto));
        !           233:        asm("   movl %0,d6" : : "m" (devtype));
        !           234:        asm("   movl %0,a5" : : "a" (load));
        !           235: #endif
        !           236:        (*((int (*)()) x.a_entry))();
        !           237:        exit();
        !           238: shread:
        !           239:        _stop("Short read\n");
        !           240: }

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