/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-10-09     Bernard      the grub related definitions
 *                             (multiboot)
 */

#ifndef __GRUB_H__
#define __GRUB_H__

/* the magic number for the multiboot header.  */
#define MULTIBOOT_HEADER_MAGIC      0x1BADB002

/* the flags for the multiboot header.  */
#define MULTIBOOT_HEADER_FLAGS      0x00000003

/* the magic number passed by a multiboot-compliant boot loader.  */
#define MULTIBOOT_BOOTLOADER_MAGIC  0x2BADB002

#ifndef __ASM__
/* the multiboot header.  */
typedef struct multiboot_header
{
    unsigned long magic;
    unsigned long flags;
    unsigned long checksum;
    unsigned long header_addr;
    unsigned long load_addr;
    unsigned long load_end_addr;
    unsigned long bss_end_addr;
    unsigned long entry_addr;
} multiboot_header_t;

/* the section header table for elf.  */
typedef struct elf_section_header_table
{
    unsigned long num;
    unsigned long size;
    unsigned long addr;
    unsigned long shndx;
} elf_section_header_table_t;

/* the multiboot information.  */
typedef struct multiboot_info
{
    unsigned long flags;
    unsigned long mem_lower;
    unsigned long mem_upper;
    unsigned long boot_device;
    unsigned long cmdline;
    unsigned long mods_count;
    unsigned long mods_addr;
    union
    {
        aout_symbol_table_t aout_sym;
        elf_section_header_table_t elf_sec;
    } u;
    unsigned long mmap_length;
    unsigned long mmap_addr;
} multiboot_info_t;

/* the module structure.  */
typedef struct module
{
    unsigned long mod_start;
    unsigned long mod_end;
    unsigned long string;
    unsigned long reserved;
} module_t;

/* the memory map. be careful that the offset 0 is base_addr_low
   but no size.  */
typedef struct memory_map
{
    unsigned long size;
    unsigned long base_addr_low;
    unsigned long base_addr_high;
    unsigned long length_low;
    unsigned long length_high;
    unsigned long type;
} memory_map_t;

#endif

#endif