lilo.h

LINUX lilo-22.7 源代码。

#define STAGE_FLAG_MENU	0x0200	/* boot loader supports menu interface */
#define STAGE_FLAG_BMP4	0x0400	/* boot loader supports 640x480x4 bitmaps */

#define SETUPSECS	4	/* nr of setup sectors */
#define VSS_NUM		497	/* address where variable setup size is
				   stored */
#define VGA_SET		506	/* address of initial kernel VGA mode */
#define MAX_SETUPSECS	31	/* maximum number of sectors in kernel
				   setup code (+ bootsect) */
#define MAX_KERNEL_SECS	1024	/* absolute maximum kernel size */
#define SPECIAL_SECTORS	2	/* special sectors (don't compact) at beginning
				   of map sections */
#define SPECIAL_BOOTSECT 1	/* INITSEG bootsect.S bootloader at beginning
				   of all kernels, ahead of SETUPSECS */

#define LINEAR_FLAG	0x40	/* mark linear address */
#define LBA32_FLAG      0x20    /* mark lba 32-bit address */
#define LBA32_NOCOUNT   0x40    /* mark address with count absent */
#define RAID_REL_FLAG	0x10	/* mark address raid-relocatable */
/*
 *	FLAG	Description
 *
 *   	0x00	 pure geometric addressing (C:H:S)
 *	0x40	 Linear address (24-bits) converted to CHS at boot-time
 *	0x60	 LBA32 address (32-bits), count=1, sets the high nibble!!
 *	0x20	 LBA32 address (24-bits) + (8-bit) high nibble (implied)
 *
*/
#define DEV_MASK_EXP	0x80+MAX_BIOS_DEVICES-1
#define DEV_MASK	(DEV_MASK_EXP)

#define	EX_OFF		SETUP_STACKSIZE-8+SSDIFF /* external parameter block */
#define EX_DL_MAG	0xfe	/* magic number in DL */
#define EX_MAG_L	0x494c	/* magic number at ES:SI, "LI" */
#define EX_MAG_H	0x4f4c	/* magic number at ES:SI+2, "LO" */
#define EX_MAG_HL	0x4f4c494c  /* "LILO" */
#define EX_MAG_STRING	"LILO"	/* magic signature string as as string */

#define BIOS_MAX_DEVS	2	/* BIOS devices (2 fd, 2 hd) */
#define BIOS_MAX_HEADS  256	/* 8 bits head number; really 255 */
			/* but must account for oddball BIOS's that allow 256 */
#define BIOS_MAX_CYLS   1024	/* 10 bits cylinder number */
#define BIOS_MAX_SECS   63	/* 6 bits sector number (no, it's not 64) */

/* these are the boot record flags in the "prompt" variable */
#define FLAG_PROMPT	1	/* always issue boot: prompt */
#define FLAG_RAID	2	/* one boot record of many */
#define FLAG_RAID_DEFEAT  4	/* defeat finding this RAID boot record */
#if 0
#define FLAG_RAID_NOWRITE 8	/* defeat RAID writeback of command line */
#endif
#define FLAG_NOBD	16	/* defeat BIOS data collection at boot time */
#define FLAG_LARGEMEM	32	/* BIOS has MoveExtMemBlk support for 386 */
#define FLAG_MAP_ON_BOOT 64	/* map file is on the boot device */
#define FLAG_BD_OKAY	128	/* BIOS data collection known to work */
#ifdef FLAG_RAID_NOWRITE
#define FLAG_SAVE (~(FLAG_RAID|FLAG_RAID_DEFEAT|FLAG_RAID_NOWRITE))  /* All but raid flags */
#else
#define FLAG_SAVE (~(FLAG_RAID|FLAG_RAID_DEFEAT))  /* All but raid flags */
#endif

/* these are the second-stage specific flags */
#define FLAG2_EL_TORITO	 2	/* El Torito format bootable CD */
#define FLAG2_UNATTENDED 4	/* Unattended booting option */

/* these are the descriptor flags */
#define FLAG_VGA	1	/* override VGA mode */
#define FLAG_RESTR	2	/* restrict additional parameters */
#define FLAG_LOCK	4	/* lock on target */
#define FLAG_MODKRN	8	/* modern kernel with high memory support */
#define FLAG_KERNEL	16	/* image is a kernel */
#define FLAG_TOOBIG	32	/* initrd so big, kernel may overwrite */
#define FLAG_FALLBACK	64	/* fallback command line exists */
#define FLAG_PASSWORD	128	/* this image requires a password */
#define FLAG_LOADHI	256	/* this kernel loads high (>=1Mb) */
#ifdef LCF_VIRTUAL
#define FLAG_VMDISABLE	512	/* unable to boot if virtual */
#define FLAG_VMWARN	1024	/* warn on virtual boot */
#define FLAG_VMDEFAULT	2048	/* this is the default vitual load */
#endif
#define FLAG_SINGLE	4096	/* single key activation */
#define FLAG_RETAIN	0x2000	/* retain BMP screen on boot */

#define VGA_NOCOVR	0x8000	/* VGA setting not overridden on command line */

#define SER_DFL_PRM	0xa3	/* default serial parameters: 2400n8 */

#define DC_MAGIC	0xf4f2	/* magic number of default cmd. line sector */
#define DC_MGOFF	0x6b6d	/* magic number for disabled line */

#define MAX_MESSAGE	65535	/* maximum message length */
#define MAX_MENU_TITLE	37	/* maximum MENU title length */

#define NEW_HDR_SIG	"HdrS"	/* setup header signature */
#define NEW_HDR_VERSION	0x200	/* header version number */
#define NEW2_HDR_VERSION 0x202	/* new cmdline protocol */
#define NEW3_HDR_VERSION 0X203	/* defines CL_RAMDISK_MAX */
#define LOADER_VERSION	0x02	/* loader version, for SETUP_HDR.loader */
#define LFLAG_HIGH	1	/* SETUP_HDR.flags */
#define LFLAG_USE_HEAP	0x80

#define PRTMAP_SIZE	32	/* number of partition type mappings */
#define DRVMAP_SIZE	24	/* number of drive mappings */

#define CRC_POLY1 0x04c11db7
#define CRC_POLY2 0x23a55379
#define CRC_POLY3 0x049f21c7
#define CRC_POLY4 0x1c632927
#define CRC_POLY5 0xA3139383

#define PROBE_SIGNATURE	"LiLo"	/* signature placed in low memory */
#define PROBESEG 0x60		/* must be in first 4k page in memory */
#define EDD_LTH	    30		/* length of the EDD return structure (max) */
#define EDD_PACKET  01		/* packet calls are supported */
#define EDD_LOCK    02		/* removable media may be locked */
#define EDD_SUBSET  04		/* EDD call supported */



#ifdef LILO_ASM
BOOTSEG   = 0x07C0			! original address of boot-sector
PARTS_LOAD= 0x0600			! partition sector load address
PARTS_SCR = 0x0800			! ditto, for non-boot partitions
PART_TABLE= 0x07BE			! partition table

INITSEG   = DEF_INITSEG			! we move boot here - out of the way
SETUPSEG  = DEF_SETUPSEG		! setup starts here
SYSSEG    = DEF_SYSSEG			! system loaded at 0x10000 (65536).

MAX_DESCR_SECS_asm = MAX_DESCR_SECS	! **
MAX_DESCR_SECTORS_asm = MAX_DESCR_SECTORS ! **
MAX_IMAGE_NAME_asm = MAX_IMAGE_NAME	! **
MAX_PW_CRC_asm	= MAX_PW_CRC		! **
SECTOR_SIZE_asm = SECTOR_SIZE		! **
MAX_MENU_TITLE_asm = MAX_MENU_TITLE	! **
MAX_BIOS_DEVICES_asm = MAX_BIOS_DEVICES	! **
MAX_RAID_DEVICES_asm = MAX_RAID_DEVICES	! **
DEV_MASK_asm = DEV_MASK_EXP		! **


STACKSEG  = 0x9000	     ! MUST == INITSEG for kernel 2.0.36 (and others?)
SETUP_STACKSIZE = 2048		! stacksize for kernel setup.S

#else
#define BOOTSEG 0x07c0			/* for probe.c  */
#endif

#define FIRSTSEG BOOTSEG

#ifdef LILO_ASM

STACK	  = 2048		! amount of stack space to reserve
SSDIFF	= 0

BOOTSECT  = 0x200		! kernel bootsect.S

#define SETUP_STACK_DYN  PARMLINE
#define SLA_SIZE_DYN  SETUP_STACK_DYN-SETUP_STACKSIZE-BOOTSECT

KBBEG     = 0x41A			! beginning of keyboard buffer
KBEND	  = 0x41C			! end of keyboard buffer
KBLOW	  = 0x1e
KBHIGH	  = 0x3e

!
!  Memory layout
!
! 0x007BE-0x007FD    64 B    partition table
! 0x07C00-0x07DFF   0.5 kB   HD/FD boot load address
! 0x10000-0x8FFFF 512.0 kB   kernel (zImage)
! 0x90000-0x901FF   0.5 kB   kernel floppy boot sector (bootsect.S)
! 0x90200-0x967FF  25.5 kB   kernel setup code (setup.S) and heap
! 0x96800-0x969FF   0.5 kB   LILO stack
! 0x96A00-0x96BFF   0.5 kB   LILO first stage loader
! 0x96C00-0x985FF   6.5 kB   LILO second stage loader
! 0x98600-0x987FF   0.5 kB   file map load area
! 0x98800-0x98BFF     1 kB   descriptor table load area
! 0x98C00-0x98DFF   0.5 kB   default command line load area
! 0x98E00-0x98FFF   0.5 kB   keyboard translation table load area
! 0x99000-0x991FF   0.5 kB   parameter line construction area
! 0x99200-0x9FFFF  27.5 kB   Extended BIOS Data Area

! when LILO has loaded the kernel, and control is transfered to
! the kernel setup.S code at 0x9020:0000
!
! 0x007BE-0x007FD    64 B    partition table
! 0x07C00-0x07DFF   0.5 kB   HD/FD boot load address
! 0x10000-0x8FFFF 512.0 kB   kernel (zImage)
! 0x90000-0x901FF   0.5 kB   kernel floppy boot sector (bootsect.S)
! 0x90200-0x967FF  25.5 kB   kernel setup code (setup.S) and heap
! 0x96800-0x987FF   8.0 kB   additional heap space
! 0x98800-0x98FFF   2.0 kB   stack created for (setup.S)
! 0x99000-0x991FF   0.5 kB   parameter line for kernel
! 0x99200-0x9FFFF  27.5 kB   Extended BIOS Data Area

CL_MAGIC_ADDR	= 0x20			! command line magic number
CL_MAGIC	= 0xa33f		! very unusual command sequence
CL_OFFSET	= 0x22			! command line offset
CL_LENGTH	= COMMAND_LINE_SIZE	! maximum length = 256-1

! 0x90020-0x90021     2 by   command line magic number
! 0x90022-0x90023     2 by   command line offset

CL_HEADER_ID	= 0x202			! "HdrS"
CL_HDRS_VERSION	= 0x206			! 0x0201=old;  0x0202=new
NEW_VERSION	= NEW2_HDR_VERSION	! 0x0202 for new cmdline protocol
CL_POINTER	= 0x228			! new pointer is dword address
CL_RAMDISK_MAX	= CL_POINTER+4		! ramdisk_max; header version 0x0203


#endif

/* Bug fix needed for some S-ATA controllers with the Silicon Image
   3112 or 3114 chipsets.  Early versions of the SI BIOS do not properly
   update the low memory size in the BIOS Data Area at 40h:13h when
   they allocate space in the Extended BIOS Data Area (EBDA).
*/
#ifdef LCF_BUG_SI_EBDA
# define EBDA_EXTRA LCF_BUG_SI_EBDA
#else
# define EBDA_EXTRA 0
#endif


/* the following configuration variable are now  required
   don't compile without them ...
 */

#ifndef LCF_UNIFY
# define LCF_UNIFY
#endif
#ifndef LCF_BUILTIN
# define LCF_BUILTIN
#endif
#ifndef LCF_FIRST6
# define LCF_FIRST6
#endif

#endif