;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; RDOS operating system
; Copyright (C) 2000, Leif Ekblad
;
; 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; either version 2 of the License, or
; (at your option) any later version. The only exception to this rule
; is for commercial usage in embedded systems. For information on
; usage in commercial embedded systems, contact embedded@rdos.net
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
;
; The author of this program may be contacted at leif@rdos.net
;
; GRUB32.ASM
; 32-bit part of GRUB dummy kernel (OS loader)
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

		NAME  grub32

;;;;;;;;; INTERNAL PROCEDURES ;;;;;;;;;;;

.386p

INCLUDE ..\os\protseg.def

IMAGE_BASE = 110000h

code	SEGMENT byte public USE32 'CODE'

	assume cs:code

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			multiboot header
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

mb_magic			DD 1BADB002h
mb_flags			DD 00010001h
mb_checksum			DD 0			; calculated by grubimg
mb_header_addr		DD IMAGE_BASE
mb_load_addr		DD 0			; calculated by grubimg
mb_load_end_addr	DD 0			; calculated by grubimg
mb_bss_end_addr		DD 0			; calculated by grubimg
mb_entry_addr		DD 0			; calculated by grubimg

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			init
;
;		DESCRIPTION:	GRUB entry-point
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

init:
	mov edx,IMAGE_BASE + OFFSET gdt10
	db 66h
	lgdt [edx]
;
	mov edx,IMAGE_BASE + OFFSET gdt8
	db 66h
    lidt [edx]
;
	db 0EAh
	dd OFFSET prot_init
	dd device_code_sel

code	ENDS

	extrn prot_init:near
	extrn gdt8:near
	extrn gdt10:near

	END init