/*
 * Copyright (c) 2009 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup genarch
 * @{
 */
/** @file
 */

#ifndef KERN_MULTIBOOT_H_
#define KERN_MULTIBOOT_H_

#define MULTIBOOT_HEADER_MAGIC  0x1badb002
#define MULTIBOOT_HEADER_FLAGS  0x00010003

#define MULTIBOOT_LOADER_MAGIC  0x2badb002

#ifndef __ASM__

#include <typedefs.h>
#include <arch/boot/memmap.h>

/** Convert 32-bit multiboot address to a pointer. */
#define MULTIBOOT_PTR(mba)  ((void *) (uintptr_t) (mba))

/** Multiboot 32-bit address. */
typedef uint32_t mbaddr_t;

/** Multiboot module structure */
typedef struct {
	mbaddr_t start;
	mbaddr_t end;
	mbaddr_t string;
	uint32_t reserved;
} __attribute__((packed)) multiboot_module_t;

/** Multiboot mmap structure */
typedef struct {
	uint32_t size;
	e820memmap_t mm_info;
} __attribute__((packed)) multiboot_memmap_t;

/** Multiboot information structure */
typedef struct {
	uint32_t flags;
	uint32_t mem_lower;
	uint32_t mem_upper;
	
	uint32_t boot_device;
	uint32_t cmdline;
	
	uint32_t mods_count;
	mbaddr_t mods_addr;
	
	uint32_t syms[4];
	
	uint32_t mmap_length;
	mbaddr_t mmap_addr;
	
	/* ... */
} __attribute__((packed)) multiboot_info_t;

enum multiboot_info_flags {
	MULTIBOOT_INFO_FLAGS_MEM     = 0x01,
	MULTIBOOT_INFO_FLAGS_BOOT    = 0x02,
	MULTIBOOT_INFO_FLAGS_CMDLINE = 0x04,
	MULTIBOOT_INFO_FLAGS_MODS    = 0x08,
	MULTIBOOT_INFO_FLAGS_SYMS1   = 0x10,
	MULTIBOOT_INFO_FLAGS_SYMS2   = 0x20,
	MULTIBOOT_INFO_FLAGS_MMAP    = 0x40
	
	/* ... */
};

extern void multiboot_extract_command(char *, size_t, const char *);
extern void multiboot_extract_argument(char *, size_t, const char *);
extern void multiboot_info_parse(uint32_t, const multiboot_info_t *);

#endif /* __ASM__ */

#endif

/** @}
 */