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+;; -----------------------------------------------------------------------
+;;
+;; Copyright 1994-2008 H. Peter Anvin - All Rights Reserved
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+;; Boston MA 02111-1307, USA; either version 2 of the License, or
+;; (at your option) any later version; incorporated herein by reference.
+;;
+;; -----------------------------------------------------------------------
+
+;;
+;; kernel.inc
+;;
+;; Header file for the kernel interface definitions
+;;
+
+%ifndef _KERNEL_INC
+%define _KERNEL_INC
+
+;;
+;; Structure of the real_mode_seg
+;;
+
+ struc real_mode_seg_t
+ resb 20h-($-$$) ; org 20h
+kern_cmd_magic resw 1 ; 0020 Magic # for command line
+kern_cmd_offset resw 1 ; 0022 Offset for kernel command line
+ resb 497-($-$$) ; org 497d
+bs_setupsecs resb 1 ; 01F1 Sectors for setup code (0 -> 4)
+bs_rootflags resw 1 ; 01F2 Root readonly flag
+bs_syssize resw 1 ; 01F4
+bs_swapdev resw 1 ; 01F6 Swap device (obsolete)
+bs_ramsize resw 1 ; 01F8 Ramdisk flags, formerly ramdisk size
+bs_vidmode resw 1 ; 01FA Video mode
+bs_rootdev resw 1 ; 01FC Root device
+bs_bootsign resw 1 ; 01FE Boot sector signature (0AA55h)
+su_jump resb 1 ; 0200 0EBh
+su_jump2 resb 1 ; 0201 Size of following header
+su_header resd 1 ; 0202 New setup code: header
+su_version resw 1 ; 0206 See linux/arch/i386/boot/setup.S
+su_switch resw 1 ; 0208
+su_setupseg resw 1 ; 020A
+su_startsys resw 1 ; 020C
+su_kver resw 1 ; 020E Kernel version pointer
+su_loader resb 1 ; 0210 Loader ID
+su_loadflags resb 1 ; 0211 Load high flag
+su_movesize resw 1 ; 0212
+su_code32start resd 1 ; 0214 Start of code loaded high
+su_ramdiskat resd 1 ; 0218 Start of initial ramdisk
+su_ramdisklen resd 1 ; 021C Length of initial ramdisk
+su_bsklugeoffs resw 1 ; 0220
+su_bsklugeseg resw 1 ; 0222
+su_heapend resw 1 ; 0224
+su_pad1 resw 1 ; 0226
+su_cmd_line_ptr resd 1 ; 0228
+su_ramdisk_max resd 1 ; 022C
+ resb (0f800h-12)-($-$$)
+linux_stack equ $ ; F7F4
+linux_fdctab resb 12
+cmd_line_here equ $ ; F800 Should be out of the way
+ endstruc
+
+;
+; Old kernel command line signature
+;
+CMD_MAGIC equ 0A33Fh ; Command line magic
+
+;
+; If we're loading the command line old-style, we need a smaller
+; heap.
+;
+old_cmd_line_here equ 9800h
+old_max_cmd_len equ 2047
+old_linux_fdctab equ old_cmd_line_here-12
+old_linux_stack equ old_linux_fdctab
+
+;
+; Magic number of su_header field
+;
+HEADER_ID equ 'HdrS' ; HdrS (in littleendian hex)
+
+;
+; Flags for the su_loadflags field
+;
+LOAD_HIGH equ 01h ; Large kernel, load high
+CAN_USE_HEAP equ 80h ; Boot loader reports heap size
+
+;
+; ID codes for various modules
+;
+syslinux_id equ 031h ; 3 = SYSLINUX family; 1 = SYSLINUX
+pxelinux_id equ 032h ; 3 = SYSLINUX family; 2 = PXELINUX
+isolinux_id equ 033h ; 3 = SYSLINUX family; 3 = ISOLINUX
+extlinux_id equ 034h ; 3 = SYSLINUX family; 4 = EXTLINUX
+
+;
+; Types of vkernels
+;
+VK_KERNEL equ 0 ; Choose by filename
+VK_LINUX equ 1 ; Linux kernel image
+VK_BOOT equ 2 ; Boot sector
+VK_BSS equ 3 ; BSS boot sector
+VK_PXE equ 4 ; PXE NBP
+VK_FDIMAGE equ 5 ; Floppy disk image
+VK_COMBOOT equ 6 ; COMBOOT image
+VK_COM32 equ 7 ; COM32 image
+VK_CONFIG equ 8 ; Configuration file
+VK_TYPES equ 9 ; Number of VK types
+
+%endif ; _KERNEL_INC