WebSVN - shark - Blame - Rev 2 - /shark/branches/pj/include/ll/i386/mb-info.h

Rev	Author	Line No.	Line
2	pj	1	/* Project: OSLib
		2	* Description: The OS Construction Kit
		3	* Date: 1.6.2000
		4	* Idea by: Luca Abeni & Gerardo Lamastra
		5	*
		6	* OSLib is an SO project aimed at developing a common, easy-to-use
		7	* low-level infrastructure for developing OS kernels and Embedded
		8	* Applications; it partially derives from the HARTIK project but it
		9	* currently is independently developed.
		10	*
		11	* OSLib is distributed under GPL License, and some of its code has
		12	* been derived from the Linux kernel source; also some important
		13	* ideas come from studying the DJGPP go32 extender.
		14	*
		15	* We acknowledge the Linux Community, Free Software Foundation,
		16	* D.J. Delorie and all the other developers who believe in the
		17	* freedom of software and ideas.
		18	*
		19	* For legalese, check out the included GPL license.
		20	*/
		21
		22	/*
		23	* GRUB -- GRand Unified Bootloader
		24	* Copyright (C) 1996 Erich Boleyn <erich@uruk.org>
		25	*
		26	* This program is free software; you can redistribute it and/or modify
		27	* it under the terms of the GNU General Public License as published by
		28	* the Free Software Foundation; either version 2 of the License, or
		29	* (at your option) any later version.
		30	*
		31	* This program is distributed in the hope that it will be useful,
		32	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		33	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		34	* GNU General Public License for more details.
		35	*
		36	* You should have received a copy of the GNU General Public License
		37	* along with this program; if not, write to the Free Software
		38	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		39	*/
		40
		41	#ifndef __LL_I386_MB_INFO_H__
		42	#define __LL_I386_MB_INFO_H__
		43
		44	#include <ll/i386/defs.h>
		45	BEGIN_DEF
		46
		47
		48	/*
		49	* The structure type "mod_list" is used by the "multiboot_info" structure.
		50	*/
		51
		52	struct mod_list
		53	{
		54	/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
		55	unsigned long mod_start;
		56	unsigned long mod_end;
		57
		58	/* Module command line */
		59	unsigned long cmdline;
		60
		61	/* padding to take it to 16 bytes (must be zero) */
		62	unsigned long pad;
		63	};
		64
		65
		66	/*
		67	* INT-15, AX=E820 style "AddressRangeDescriptor"
		68	* ...with a "size" parameter on the front which is the structure size - 4,
		69	* pointing to the next one, up until the full buffer length of the memory
		70	* map has been reached.
		71	*/
		72
		73	struct AddrRangeDesc
		74	{
		75	unsigned long size;
		76	unsigned long BaseAddrLow;
		77	unsigned long BaseAddrHigh;
		78	unsigned long LengthLow;
		79	unsigned long LengthHigh;
		80	unsigned long Type;
		81
		82	/* unspecified optional padding... */
		83	};
		84
		85	/* usable memory "Type", all others are reserved. */
		86	#define MB_ARD_MEMORY 1
		87
		88	/*
		89	* MultiBoot Info description
		90	*
		91	* This is the struct passed to the boot image. This is done by placing
		92	* its address in the EAX register.
		93	*/
		94
		95	struct multiboot_info
		96	{
		97	/* MultiBoot info version number */
		98	unsigned long flags;
		99
		100	/* Available memory from BIOS */
		101	unsigned long mem_lower;
		102	unsigned long mem_upper;
		103	/* "root" partition */
		104	unsigned long boot_device;
		105
		106	/* Kernel command line */
		107	unsigned long cmdline;
		108
		109	/* Boot-Module list */
		110	unsigned long mods_count;
		111	unsigned long mods_addr;
		112
		113	union
		114	{
		115	struct
		116	{
		117	/* (a.out) Kernel symbol table info */
		118	unsigned long tabsize;
		119	unsigned long strsize;
		120	unsigned long addr;
		121	unsigned long pad;
		122	} a;
		123
		124	struct
		125	{
		126	/* (ELF) Kernel section header table */
		127	unsigned long num;
		128	unsigned long size;
		129	unsigned long addr;
		130	unsigned long shndx;
		131	} e;
		132	} syms;
		133
		134	/* Memory Mapping buffer */
		135	unsigned long mmap_length;
		136	unsigned long mmap_addr;
		137
		138	#ifndef __OLD_MB__
		139	/*
		140	Gerardo: I need to add also the phisical address base for
		141	both low ( < 1MB) & upper ( > 1MB) memory, as X starts from DOS
		142	which could have preallocated some of this memory...
		143	For example, GRUB assumes that mem_lowbase = 0x0 &
		144	mem_upbase = 0x100000
		145	*/
		146	unsigned long mem_lowbase;
		147	unsigned long mem_upbase;
		148	#endif /* __OLD_MB__ */
		149	};
		150
		151	/*
		152	* Flags to be set in the 'flags' parameter above
		153	*/
		154
		155	/* is there basic lower/upper memory information? */
		156	#define MB_INFO_MEMORY 0x1
		157	/* is there a boot device set? */
		158	#define MB_INFO_BOOTDEV 0x2
		159	/* is the command-line defined? */
		160	#define MB_INFO_CMDLINE 0x4
		161	/* are there modules to do something with? */
		162	#define MB_INFO_MODS 0x8
		163
		164	/* These next two are mutually exclusive */
		165
		166	/* is there a symbol table loaded? */
		167	#define MB_INFO_AOUT_SYMS 0x10
		168	/* is there an ELF section header table? */
		169	#define MB_INFO_ELF_SHDR 0x20
		170
		171	/* is there a full memory map? */
		172	#define MB_INFO_MEM_MAP 0x40
		173
		174	/* Gerardo: Added this!
		175	--------------------
		176	The idea is that the BootLoader provides an interface
		177	to return back to it; this is useful to implement a DOS
		178	boot-loader, in order to use DOS as development environment.
		179	*/
		180	#define MB_INFO_USEGDT 0x80
		181
		182	/*
		183	* The following value must be present in the EAX register.
		184	*/
		185
		186	#define MULTIBOOT_VALID 0x2BADB002
		187
		188	struct multiboot_info * mbi_address(void);
		189
		190	END_DEF
		191
		192	#endif

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