Annotation of sys/arch/mvme68k/stand/bootxx/bootxx.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: bootxx.c,v 1.7 2003/08/20 00:24:43 deraadt Exp $ */
! 2: /* $NetBSD: bootxx.c,v 1.5 1995/10/13 21:44:57 gwr Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1994 Paul Kranenburg
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by Paul Kranenburg.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: /*
! 35: * This is a generic "first-stage" boot program.
! 36: *
! 37: * Note that this program has absolutely no filesystem knowledge!
! 38: *
! 39: * Instead, this uses a table of disk block numbers that are
! 40: * filled in by the installboot program such that this program
! 41: * can load the "second-stage" boot program.
! 42: */
! 43:
! 44: #include <sys/param.h>
! 45: #include <sys/time.h>
! 46: #include <sys/exec.h>
! 47: #include <machine/prom.h>
! 48:
! 49: #include "stand.h"
! 50: #include "libsa.h"
! 51: #include "libbug.h"
! 52:
! 53: /*
! 54: * Boot device is derived from ROM provided information.
! 55: */
! 56: #define LOADADDR 0x6F0000 /* where to load level 2 bootstrap */
! 57: /* (l2 must relocate itself) */
! 58:
! 59: /* This determines the largest boot program we can load. */
! 60: #define MAXBLOCKNUM 64
! 61:
! 62: /*
! 63: * These three names are known by installboot.
! 64: * The block_table contains starting block numbers,
! 65: * in terms of 512-byte blocks. Each non-zero value
! 66: * will result in a read of block_size bytes.
! 67: */
! 68: int block_size = 512; /* default */
! 69: int block_count = MAXBLOCKNUM; /* length of table */
! 70: daddr_t block_table[MAXBLOCKNUM] = { 0 };
! 71:
! 72: extern char *version;
! 73:
! 74: static int
! 75: copyboot(struct open_file *fp, char *addr)
! 76: {
! 77: int n, i, blknum;
! 78: struct exec *x;
! 79:
! 80: addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
! 81: x = (struct exec *)addr;
! 82:
! 83: if (!block_count) {
! 84: printf("bootxx: no data!?!\n");
! 85: return -1;
! 86: }
! 87:
! 88: for (i = 0; i < block_count; i++) {
! 89:
! 90: if ((blknum = block_table[i]) == 0)
! 91: break;
! 92:
! 93: #ifdef DEBUG
! 94: printf("bootxx: read block # %d = %d\n", i, blknum);
! 95: #endif
! 96: if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
! 97: blknum, block_size, addr, &n)) {
! 98: printf("bootxx: read failed\n");
! 99: return -1;
! 100: }
! 101: if (n != block_size) {
! 102: printf("bootxx: short read\n");
! 103: return -1;
! 104: }
! 105: addr += block_size;
! 106: }
! 107:
! 108: if (N_GETMAGIC(*x) != OMAGIC) {
! 109: printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
! 110: return(-1);
! 111: }
! 112:
! 113: return 0;
! 114: }
! 115:
! 116: main(int argc, char *argv[])
! 117: {
! 118: struct open_file f;
! 119: char *addr;
! 120: int n, error;
! 121:
! 122: printf("Boot: bug device: ctrl=%d, dev=%d\n",
! 123: bugargs.ctrl_lun, bugargs.dev_lun);
! 124: printf("\nbootxx: first level bootstrap program [%s]\n\n", version);
! 125:
! 126: f.f_flags = F_RAW;
! 127: if (devopen(&f, 0, &addr)) {
! 128: printf("bootxx: open failed\n");
! 129: _rtt();
! 130: }
! 131:
! 132: addr = (char *)LOADADDR;
! 133: error = copyboot(&f, addr);
! 134: f.f_dev->dv_close(&f);
! 135: if (!error) {
! 136: bugexec((void (*)(void))addr + 8);
! 137: }
! 138: /* copyboot had a problem... */
! 139: _rtt();
! 140: }
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