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