lilo.h

LINUX lilo-22.7 源代码。

/* lilo.h  -  LILO constants

Copyright 1992-1998 Werner Almesberger.
Copyright 1999-2004 John Coffman.
All rights reserved.

Licensed under the terms contained in the file 'COPYING' in the 
source directory.

*/


/* This file is also included by the boot loader assembler code. Put
   everything that isn't legal C syntax or isn't swallowed by the
   preprocessor into #ifdef LILO_ASM ... #endif */

#ifndef LILO_H
#define LILO_H

#if !__MSDOS__
#define INT4 int
#else
#define INT4 long
#endif /* !__MSDOS__ */

/* This is the stuff to check the configuration:
 */
#if defined(LCF_READONLY) && defined(LCF_REWRITE_TABLE)
#error "Incompatible Makefile options: READONLY and REWRITE_TABLE"
#endif

/*
 * Starting with 2.1.something, Linux kernels put VGA constants and segment
 * definitions into asm/boot.h instead of linux/config.h
 */

#if 0

#ifdef HAS_BOOT_H
#include <asm/boot.h>
#else
#include <linux/config.h>
#endif

#else

/* Don't touch these, unless you really know what you're doing. */
#define DEF_INITSEG	0x9000
#define DEF_SYSSEG	0x1000
#define DEF_SETUPSEG	0x9020
#define DEF_SYSSIZE	0x7F00

/* Internal svga startup constants */
#define NORMAL_VGA	0xffff		/* 80x25 mode */
#define EXTENDED_VGA	0xfffe		/* 80x50 mode */
#define ASK_VGA		0xfffd		/* ask for it at bootup */

#endif

#if defined(HAS_VERSION_H) && !__MSDOS__
#include <linux/version.h>
#endif /* !__MSDOS__ */

#ifndef LINUX_VERSION_CODE
#define LINUX_VERSION_CODE 0
#endif
#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
#endif

#define nelem(a) (sizeof(a)/sizeof((a)[0]))
#define S2(x) #x
#define S(x) S2(x)

#include "version.h"
#define VERSION 256*VERSION_MINOR+VERSION_MAJOR
#if VERSION_MINOR >= 50
# define BETA_TEST 1
#else
# define BETA_TEST 0
#endif

/* definitions for pf_hard_disk_scan in device.c  */
#if VERSION_MINOR>50 && DEBUG
#define PARTITIONS "./devfs_partitions"
#else
#define PARTITIONS "/proc/partitions"
#endif


/* the known major device numbers */
#define MAJMIN_RAM	0x101 /* RAM disk */
#define MAJOR_FD	2 /* floppy disks */
#define MAJOR_HPT370_SORT  MAJOR_FD	/* 114->2 for sorting HPT370 controller */
#define MAJOR_HD	3 /* IDE-type hard disks */
#define MAJOR_LOOP	7 /* Loopback devices 0-15 */
#define MAJOR_SD	8 /* SCSI disks 0-15 */
#define MAJOR_MD	9 /* multi-disk RAID sets */
#define MAJOR_XT	13 /* XT-type hard disks */
#define MAJOR_ACORN	21 /* Acorn MFM controller */
#define MAJOR_IDE2	22 /* IDE on second interface */
#define MAJOR_IDE3	33 /* IDE on third interface */
#define MAJOR_IDE4	34 /* IDE on fourth interface */
#define MAJOR_ESDI	36 /* PS/2 ESDI drives */
#define MAJOR_FTL	44 /* Flash Transition Layer on Memory Technology Device */
#define MAJOR_PP	45 /* Parallel Port IDE drive */
#define MAJOR_PPFD	47 /* Parallel Port floppy drive */
#define MAJOR_DAC960	48 /* First Mylex DAC960 PCI RAID controller */
#if !BETA_TEST || 1
#define MAJOR_IDE5	56 /* IDE on fifth interface */
#endif
#define MAJOR_IDE6	57 /* IDE on sixth interface */
#define MAJOR_LVM	58 /* Logical Volume Manager block device */
#define MAJOR_EXPR	60 /* Experimental devices 60..63 */
/*#define MAJOR_FL	62 / M-Systems Disk-On-Chip 2000 ***experimental*** */

#define MAJOR_SD_SORT	64 /*** MAJOR_SD converted to this for sorting ***/
#define MAJOR_SD2	65 /* SCSI disks 16-31 */
#define MAJOR_SD3	66 /* SCSI disks 32-47 */
#define MAJOR_SD4	67 /* SCSI disks 48-63 */
#define MAJOR_SD5	68 /* SCSI disks 64-79 */
#define MAJOR_SD6	69 /* SCSI disks 80-95 */
#define MAJOR_SD7	70 /* SCSI disks 96-111 */
#define MAJOR_SD8	71 /* SCSI disks 112-127 */
#define MAJOR_SMART2	72 /* First Compaq Smart/2 Major 72-79 */
#define MAJOR_I2O	80  /* First I2O block device 80-87 */
#define MAJOR_IDE7	88 /* IDE on seventh interface */
#define MAJOR_IDE8	89 /* IDE on eighth interface */
#define MAJOR_IDE9	90 /* IDE on ninth interface */
#define MAJOR_IDE10	91 /* IDE on tenth interface */
#define MAJOR_PPDD	92 /* PPDD encrypted disks - not supported */
#define MAJOR_NFTL	93 /* NAND Flash Translation Layer (Disk-On-Chip) */
#define MAJOR_DOC	100 /* Disk-On-Chip driver */
#define MAJOR_AMI_HYP	101 /* AMI Hyper Disk RAID controller */
#define MAJOR_CISS	104 /* First CCISS Major 104-111 */
#define MAJOR_IBM_iSER	112 /* IBM iSeries virtual disk */
#define MAJOR_HPT370	114 /* HPT370 controller */
#define MAJOR_EVMS	117 /* Enterprise Volume Management System */
#define MAJOR_SD9	128 /* SCSI disks 129     */
#define MAJOR_SD16	135 /* SCSI disks    -255 */
#define MAJOR_DAC960_8	136 /* Ninth Mylex DAC960 PCI RAID controller */
#define MAJOR_EMD	153 /* Enhanced multi-disk RAID sets */
#define MAJOR_SATA	160 /* Carmel SATA Disk on first 8-port controller */
#define MAJOR_SATA2	161 /* Carmel SATA Disk on 2nd 8-port controller */

#define MAX_TOKEN	1023 /* max device Token length */
#define MAX_IMAGE_NAME	15 /* maximum name length (w/o terminating NUL) */
#define MAX_DESCR_SECTORS  12  /* upper limit on MAX_DESCR_SECS */

#ifdef LCF_PASS160
#undef SHS_PASSWORDS
#define SHS_PASSWORDS		/* use this one if SHS passwords are in use */
#define MAX_PW_CRC	5  	/* max # of longwords in password digest */
#define PW_FILE_SUFFIX ".shs"  	/* suffix for the file that saves password digest */
#else
#define CRC_PASSWORDS		/* use this one if CRC passwords are in use */
#define MAX_PW_CRC	2  	/* max # of CRC-32's in password */
#define PW_FILE_SUFFIX ".crc"  	/* suffix for the file that saves password CRC's */
#endif

#ifdef LCF_DSECS
#define MAX_DESCR_SECS LCF_DSECS
#else
#define MAX_DESCR_SECS 2	/* maximum # of descriptor sectors */
#endif
#if MAX_DESCR_SECS > MAX_DESCR_SECTORS
# error "Maximum DSECS=x exceeded."
#endif
#define MAX_IMAGES      ((int)((SECTOR_SIZE*MAX_DESCR_SECS-sizeof(INT4)-1)/sizeof(IMAGE_DESCR)))
			  /* maximum number of images */

#define COMMAND_LINE_SIZE	256	/* CL_LENGTH */
#define SECTOR_SIZE	512 /* disk sector size */
#ifndef BLOCK_SIZE /* may also come from linux/fs.h */
#define BLOCK_SIZE	1024 /* disk block size */
#endif

#define PARTITION_ENTRY	   16	/* size of one partition entry */
#define PARTITION_ENTRIES  4    /* number of partition entries */
#define PART_TABLE_SIZE    (PARTITION_ENTRY*PARTITION_ENTRIES)
#define PART_TABLE_OFFSET  0x1be /* offset in the master boot sector */
#define PART_ACT_ENT_OFF   0	/* offset in entry for active flag */
#define PART_TYPE_ENT_OFF  4	/* offset in entry for partition type */

#define P_MASK(x) ((~has_partitions(x))&0xFFFF)
#define D_MASK(x) (has_partitions(x))
#define PART_MAX PARTITION_ENTRIES /* biggest primary partition number */
#define PART_MAX_MAX	63	/* max. partition number (on IDE disks) */

#define MAX_BOOT_SIZE	0x1b6	/* (leave some space for NT's and DR DOS' dirty
				   hacks) scream if the boot sector gets any
				   bigger -- (22.5 - we now use those hacks) */

#define BOOT_SIGNATURE	0xAA55	/* boot signature */
#define BOOT_SIG_OFFSET	510	/* boot signature offset */
#define MAGIC_SERIAL	0xC9CF	/* LILO installed serial number */
#define PRIME		271	/* prime number used for serial no generation */
#define SMALL_PRIME     17	/* another prime, but a small one */
#if VERSION_MINOR>90
#define MAX_BIOS_DEVICES  2	/* max hard disk devices used by BIOS */
#define MAX_DEVICES	4	/* max hard disk devices, total */
#else
#define MAX_BIOS_DEVICES  16	/* max hard disk devices used by BIOS */
#define MAX_DEVICES	64	/* max hard disk devices, total */
#endif
#define MAX_RAID	30	/* max number of RAID disks in a set */
#if 0
#define MAX_RAID_DEVICES  6	/* max raid devices reported to second.S */
#else
#define MAX_RAID_DEVICES MAX_DESCR_SECTORS-MAX_DESCR_SECS+6	/* max raid devices reported to second.S */
#endif

#define PART_LINUX_MINIX  0x81	/* Linux/MINIX partition */
#define PART_LINUX_SWAP	  0x82	/* Linux swap partition */
#define PART_LINUX_NATIVE 0x83	/* Linux native (file system) */
#define PART_DOS_EXTD 	  5	/* DOS Extended partition */
#define PART_WIN_EXTD_LBA 0xF	/* Win95/98 Extended partition */
#define PART_LINUX_EXTD   0x85	/* Linux Extended partition */
#define PART_OS2_BOOTMGR  0xA	/* OS/2 Boot Manager */

#define PART_DOS12	  1	/* DOS 12 bit FAT partition type */
#define PART_DOS16_SMALL  4	/* DOS 16 bit FAT partition type, < 32 MB */
#define PART_DOS16_BIG	  6	/* DOS 16 bit FAT partition type, >= 32 MB */
#define PART_HPFS	  7	/* OS/2 High Performance File System */
#define PART_NTFS	  7	/* WinNT File System */
#define PART_FAT32	  0xB	/* Win95/98 FAT32 partition on small disk */
#define PART_FAT32_LBA	  0xC	/* Win95/98 FAT32 partition on large disk */
#define PART_FAT16_LBA	  0xE	/* Win95/98 FAT16 partition on large disk */
#define PART_INVALID	  98	/* invalid partition type */

#define HIDDEN_OFF	0x10	/* type offset to hide partition (OS/2 BM) */
#define PART_HDOS12	PART_DOS12+HIDDEN_OFF
#define PART_HDOS16_SMALL PART_DOS16_SMALL+HIDDEN_OFF
#define PART_HDOS16_BIG	PART_DOS16_BIG+HIDDEN_OFF

#define STAGE_FIRST	1	/* first stage loader code */
#define STAGE_SECOND	2	/* second stage loader code */
#define	STAGE_CHAIN	0x10	/* chain loader code */
#define STAGE_DRIVE_MAP	0x11	/* chain loader drive mapper */
#define STAGE_MBR	0x12	/* mbr loader */
#define STAGE_MBR2	0x13	/* mbr2 loader (extended) */
#define STAGE_FLAG_SERIAL  0x0100	/* boot loader supports serial i/o */