1 ;; -----------------------------------------------------------------------
3 ;; Copyright 1994-2002 H. Peter Anvin - All Rights Reserved
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, Inc., 53 Temple Place Ste 330,
8 ;; Boston MA 02111-1307, USA; either version 2 of the License, or
9 ;; (at your option) any later version; incorporated herein by reference.
11 ;; -----------------------------------------------------------------------
16 ;; Header file for the kernel interface definitions
23 ;; Structure of the real_mode_seg
27 resb 20h-($-$$) ; org 20h
28 kern_cmd_magic resw 1 ; 0020 Magic # for command line
29 kern_cmd_offset resw 1 ; 0022 Offset for kernel command line
30 resb 497-($-$$) ; org 497d
31 bs_setupsecs resb 1 ; 01F1 Sectors for setup code (0 -> 4)
32 bs_rootflags resw 1 ; 01F2 Root readonly flag
33 bs_syssize resw 1 ; 01F4
34 bs_swapdev resw 1 ; 01F6 Swap device (obsolete)
35 bs_ramsize resw 1 ; 01F8 Ramdisk flags, formerly ramdisk size
36 bs_vidmode resw 1 ; 01FA Video mode
37 bs_rootdev resw 1 ; 01FC Root device
38 bs_bootsign resw 1 ; 01FE Boot sector signature (0AA55h)
39 su_jump resb 1 ; 0200 0EBh
40 su_jump2 resb 1 ; 0201 Size of following header
41 su_header resd 1 ; 0202 New setup code: header
42 su_version resw 1 ; 0206 See linux/arch/i386/boot/setup.S
43 su_switch resw 1 ; 0208
44 su_setupseg resw 1 ; 020A
45 su_startsys resw 1 ; 020C
46 su_kver resw 1 ; 020E Kernel version pointer
47 su_loader resb 1 ; 0210 Loader ID
48 su_loadflags resb 1 ; 0211 Load high flag
49 su_movesize resw 1 ; 0212
50 su_code32start resd 1 ; 0214 Start of code loaded high
51 su_ramdiskat resd 1 ; 0218 Start of initial ramdisk
52 su_ramdisklen resd 1 ; 021C Length of initial ramdisk
53 su_bsklugeoffs resw 1 ; 0220
54 su_bsklugeseg resw 1 ; 0222
55 su_heapend resw 1 ; 0224
57 su_cmd_line_ptr resd 1 ; 0228
58 su_ramdisk_max resd 1 ; 022C
59 resb (9000h-12)-($-$$) ; Were bootsect.S puts it...
60 linux_stack equ $ ; 8FF4
63 cmd_line_here equ $ ; 9000 Should be out of the way
67 ; Kernel command line signature
69 CMD_MAGIC equ 0A33Fh ; Command line magic
72 ; Magic number of su_header field
74 HEADER_ID equ 'HdrS' ; HdrS (in littleendian hex)
77 ; Flags for the su_loadflags field
79 LOAD_HIGH equ 01h ; Large kernel, load high
80 CAN_USE_HEAP equ 80h ; Boot loader reports heap size
83 ; ID codes for various modules
85 syslinux_id equ 031h ; 3 = SYSLINUX family; 1 = SYSLINUX
86 pxelinux_id equ 032h ; 3 = SYSLINUX family; 2 = PXELINUX
87 isolinux_id equ 033h ; 3 = SYSLINUX family; 3 = ISOLINUX
88 extlinux_id equ 034h ; 3 = SYSLINUX family; 4 = EXTLINUX