1 /* 2 * GRUB -- GRand Unified Bootloader 3 * Copyright (C) 1999,2000,2002,2004 Free Software Foundation, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20 #ifndef STAGE1_HEADER 21 #define STAGE1_HEADER 1 22 23 24 /* Define the version numbers here, so that Stage 1 can know them. */ 25 #define COMPAT_VERSION_MAJOR 3 26 #define COMPAT_VERSION_MINOR 2 27 #define COMPAT_VERSION ((COMPAT_VERSION_MINOR << 8) \ 28 | COMPAT_VERSION_MAJOR) 29 30 /* The signature for bootloader. */ 31 #define STAGE1_SIGNATURE 0xaa55 32 33 /* The offset of the end of BPB (BIOS Parameter Block). */ 34 #define STAGE1_BPBEND 0x3e 35 36 /* The offset of the major version. */ 37 #define STAGE1_VER_MAJ_OFFS 0x3e 38 39 /* The offset of BOOT_DRIVE. */ 40 #define STAGE1_BOOT_DRIVE 0x40 41 42 /* The offset of FORCE_LBA. */ 43 #define STAGE1_FORCE_LBA 0x41 44 45 /* The offset of STAGE2_ADDRESS. */ 46 #define STAGE1_STAGE2_ADDRESS 0x42 47 48 /* The offset of STAGE2_SECTOR. */ 49 #define STAGE1_STAGE2_SECTOR 0x44 50 51 /* The offset of STAGE2_SEGMENT. */ 52 #define STAGE1_STAGE2_SEGMENT 0x48 53 54 /* The offset of BOOT_DRIVE_CHECK. */ 55 #define STAGE1_BOOT_DRIVE_CHECK 0x4b 56 57 /* The offset of a magic number used by Windows NT. */ 58 #define STAGE1_WINDOWS_NT_MAGIC 0x1b8 59 60 /* The offset of the start of the partition table. */ 61 #define STAGE1_PARTSTART 0x1be 62 63 /* The offset of the end of the partition table. */ 64 #define STAGE1_PARTEND 0x1fe 65 66 /* The stack segment. */ 67 #define STAGE1_STACKSEG 0x2000 68 69 /* The segment of disk buffer. The disk buffer MUST be 32K long and 70 cannot straddle a 64K boundary. */ 71 #define STAGE1_BUFFERSEG 0x7000 72 73 /* The address of drive parameters. */ 74 #define STAGE1_DRP_ADDR 0x7f00 75 76 /* The size of drive parameters. */ 77 #define STAGE1_DRP_SIZE 0x42 78 79 /* The flag for BIOS drive number to designate a hard disk vs. a 80 floppy. */ 81 #define STAGE1_BIOS_HD_FLAG 0x80 82 83 /* The drive number of an invalid drive. */ 84 #define GRUB_INVALID_DRIVE 0xFF 85 86 #endif /* ! STAGE1_HEADER */ 87