projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 0a5cfe20 WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| 8 | * %sccs.include.noredist.c% | |
| 9 | * | |
| 10 | * @(#)bootxx.c 7.1 (Berkeley) %G% | |
| 11 | */ | |
| 12 | ||
| 13 | #include "../h/param.h" | |
| 14 | #include "../h/inode.h" | |
| 15 | #include "../h/fs.h" | |
| 16 | #include <a.out.h> | |
| 17 | #include "saio.h" | |
| 18 | #include "../h/reboot.h" | |
| 19 | #include "../h/dir.h" | |
| 20 | #include "../h/disk.h" | |
| 21 | #include "devvm.h" | |
| 22 | ||
| 23 | extern int howto, bootdev, unit, cyloffset, boottype; | |
| 24 | extern char bootprog[] ; | |
| 25 | /* | |
| 26 | * Boot program... arguments passed in r10 and r11 | |
| 27 | * are passed through to the full boot program. | |
| 28 | */ | |
| 29 | ||
| 30 | main() | |
| 31 | { | |
| 32 | register int io, partition; register char *bp ; | |
| 33 | ||
| 34 | #ifdef lint | |
| 35 | howto = 0; devtype = 0; | |
| 36 | #endif | |
| 37 | extern struct disklabel disklabel; | |
| 38 | ||
| 39 | /* are we a disk, if so look at disklabel and do things */ | |
| 40 | if (bootdev == 0 || bootdev == 3) { | |
| 41 | /* | |
| 42 | * Synthesize bootdev from unit, type and partition | |
| 43 | * from the ROM monitor. | |
| 44 | * It's dirty work, but someone's got to do it, and | |
| 45 | * we always seem to get it. | |
| 46 | */ | |
| 47 | for (io = 0; io < 8; io++) | |
| 48 | if (bootdev > 0) { /* XXX should check dk_type == DTYPE_SCSI */ | |
| 49 | if (disklabel.dk_partition[io].cyloff | |
| 50 | == cyloffset * disklabel.dk_secpercyl) | |
| 51 | break; | |
| 52 | } else { | |
| 53 | ||
| 54 | if (disklabel.dk_partition[io].cyloff == cyloffset) | |
| 55 | break; | |
| 56 | } | |
| 57 | if (io == 8) io = 0; /* probably a bad or non-existant disklabel */ | |
| 58 | bootdev = makedev(bootdev, make_minor(unit, io)); | |
| 59 | } else { io = 0 ; howto = (howto&0x7) | 3 ; } | |
| 60 | bp = bootprog ; | |
| 61 | while (*bp != '0') bp++ ; /* n-char device names instead of 2 */ | |
| 62 | *bp++ = unit % 10 + '0' ; | |
| 63 | *bp += io % 10 ; | |
| 64 | /* bootprog[3] = unit % 10 + '0'; | |
| 65 | bootprog[4] = io % 10 + 'a';*/ | |
| 66 | printf("loading %s\n", bootprog); | |
| 67 | io = open(bootprog, 0); | |
| 68 | if (io >= 0) | |
| 69 | copyunix(io); | |
| 70 | _stop("boot failed\n"); | |
| 71 | } | |
| 72 | ||
| 73 | /*ARGSUSED*/ | |
| 74 | copyunix(io) | |
| 75 | register io; | |
| 76 | { | |
| 77 | struct exec x; | |
| 78 | register int i; | |
| 79 | char *addr; | |
| 80 | ||
| 81 | i = read(io, (char *)&x, sizeof x); | |
| 82 | if (i != sizeof x || | |
| 83 | (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410)) | |
| 84 | _stop("Bad format\n"); | |
| 85 | if ((x.a_magic == 0413 || x.a_magic == 0410) && | |
| 86 | lseek(io, 0x400, 0) == -1) | |
| 87 | goto shread; | |
| 88 | if (read(io, (char *)0, x.a_text) != x.a_text) | |
| 89 | goto shread; | |
| 90 | addr = (char *)x.a_text; | |
| 91 | if (x.a_magic == 0413 || x.a_magic == 0410) | |
| 92 | while ((int)addr & CLOFSET) | |
| 93 | *addr++ = 0; | |
| 94 | if (read(io, addr, x.a_data) != x.a_data) | |
| 95 | goto shread; | |
| 96 | addr += x.a_data; | |
| 97 | x.a_bss += 128*512; /* slop */ | |
| 98 | for (i = 0; i < x.a_bss; i++) | |
| 99 | *addr++ = 0; | |
| 100 | setregs(); | |
| 101 | (*((int (*)()) x.a_entry))(); | |
| 102 | return; | |
| 103 | shread: | |
| 104 | _stop("Short read\n"); | |
| 105 | } |