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Annotation of sys/arch/mvme88k/stand/bootxx/bootxx.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: bootxx.c,v 1.6 2006/05/16 22:52:09 miod Exp $ */
                      2:
                      3: /*
                      4:  * Copyright (c) 1994 Paul Kranenburg
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *      This product includes software developed by Paul Kranenburg.
                     18:  * 4. The name of the author may not be used to endorse or promote products
                     19:  *    derived from this software without specific prior written permission
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     22:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     23:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     24:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     25:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     26:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     27:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     28:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     29:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     30:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     31:  */
                     32:
                     33: /*
                     34:  * This is a generic "first-stage" boot program.
                     35:  *
                     36:  * Note that this program has absolutely no filesystem knowledge!
                     37:  *
                     38:  * Instead, this uses a table of disk block numbers that are
                     39:  * filled in by the installboot program such that this program
                     40:  * can load the "second-stage" boot program.
                     41:  */
                     42:
                     43: #include <sys/param.h>
                     44: #include <sys/time.h>
                     45: #include <sys/exec.h>
                     46: #include <machine/prom.h>
                     47:
                     48: #include "stand.h"
                     49: #include "libsa.h"
                     50:
                     51: /*
                     52:  * Boot device is derived from ROM provided information.
                     53:  */
                     54:
                     55: /* This determines the largest boot program we can load. */
                     56: #define MAXBLOCKNUM    64
                     57:
                     58: /*
                     59:  * These three names are known by installboot.
                     60:  * The block_table contains starting block numbers,
                     61:  * in terms of 512-byte blocks.  Each non-zero value
                     62:  * will result in a read of block_size bytes.
                     63:  */
                     64: size_t         block_size = 512;       /* default */
                     65: int            block_count = MAXBLOCKNUM;      /* length of table */
                     66: daddr_t        block_table[MAXBLOCKNUM] = { 0 };
                     67:
                     68: extern         char *version;
                     69:
                     70: int    copyboot(struct open_file *, char *);
                     71:
                     72: int
                     73: main()
                     74: {
                     75:        struct open_file f;
                     76:        char *addr;
                     77:        int error;
                     78:
                     79:        printf("\nbootxx: first level bootstrap program [%s]\n", version);
                     80: #ifdef DEBUG
                     81:        printf("boot device: ctrl=%d, dev=%d\n",
                     82:                bugargs.ctrl_lun, bugargs.dev_lun);
                     83: #endif
                     84:
                     85:        f.f_flags = F_RAW;
                     86:        if (devopen(&f, 0, &addr)) {
                     87:                printf("bootxx: open failed\n");
                     88:                _rtt();
                     89:        }
                     90:
                     91:        addr = (char *)STAGE2_RELOC;
                     92:        error = copyboot(&f, addr);
                     93:        f.f_dev->dv_close(&f);
                     94:        if (!error) {
                     95:                bugexec((void (*)())addr + 8);
                     96:        }
                     97:        /* copyboot had a problem... */
                     98:        _rtt();
                     99:        return (0);
                    100: }
                    101:
                    102: int
                    103: copyboot(struct open_file *fp, char *addr)
                    104: {
                    105:        size_t n;
                    106:        int i, blknum;
                    107:        struct exec *x;
                    108:
                    109:        addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
                    110:        x = (struct exec *)addr;
                    111:
                    112:        if (!block_count) {
                    113:                printf("bootxx: no data!?!\n");
                    114:                return -1;
                    115:        }
                    116:
                    117:        for (i = 0; i < block_count; i++) {
                    118:
                    119:                if ((blknum = block_table[i]) == 0)
                    120:                        break;
                    121:
                    122: #ifdef DEBUG
                    123:                printf("bootxx: read block # %d = %d\n", i, blknum);
                    124: #endif
                    125:                if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
                    126:                    blknum, block_size, addr, &n)) {
                    127:                        printf("bootxx: read failed\n");
                    128:                        return -1;
                    129:                }
                    130:                if (n != block_size) {
                    131:                        printf("bootxx: short read\n");
                    132:                        return -1;
                    133:                }
                    134:                addr += block_size;
                    135:        }
                    136:
                    137:        if (N_GETMAGIC(*x) != OMAGIC) {
                    138:                printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
                    139:                return(-1);
                    140:        }
                    141:
                    142:        return 0;
                    143: }