eduOS/arch/x86/include/asm/multiboot.h

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/*
* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
* 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.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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.
*/
/**
* @author Stefan Lankes
* @file arch/x86/include/asm/multiboot.h
* @brief Structures related to the Multiboot interface
*
* eduOS is able to use Multiboot (http://www.gnu.org/software/grub/manual/multiboot/),
* which specifies an interface between a boot loader and a operating system.\n
* \n
* This file contains several structures needed to match the interface.
*/
#ifndef __ARCH_MULTIBOOT_H__
#define __ARCH_MULTIBOOT_H__
#include <eduos/stddef.h>
/// Does the bootloader provide mem_* fields?
#define MULTIBOOT_INFO_MEM (1 << 0)
/// Does the bootloader provide the command-line?
#define MULTIBOOT_INFO_CMDLINE (1 << 2)
/// Does the bootloader provide a list of modules?
#define MULTIBOOT_INFO_MODS (1 << 3)
/// Does the bootloader provide a full memory map?
#define MULTIBOOT_INFO_MEM_MAP (1 << 6)
typedef uint16_t multiboot_uint16_t;
typedef uint32_t multiboot_uint32_t;
typedef uint64_t multiboot_uint64_t;
/* The symbol table for a.out. */
struct multiboot_aout_symbol_table
{
multiboot_uint32_t tabsize;
multiboot_uint32_t strsize;
multiboot_uint32_t addr;
multiboot_uint32_t reserved;
};
typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
/* The section header table for ELF. */
struct multiboot_elf_section_header_table
{
multiboot_uint32_t num;
multiboot_uint32_t size;
multiboot_uint32_t addr;
multiboot_uint32_t shndx;
};
typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
struct multiboot_info
{
/** Multiboot info version number */
multiboot_uint32_t flags;
/** Available memory from BIOS */
multiboot_uint32_t mem_lower;
multiboot_uint32_t mem_upper;
/** "root" partition */
multiboot_uint32_t boot_device;
/** Kernel command line */
multiboot_uint32_t cmdline;
/** Boot-Module list */
multiboot_uint32_t mods_count;
multiboot_uint32_t mods_addr;
union
{
multiboot_aout_symbol_table_t aout_sym;
multiboot_elf_section_header_table_t elf_sec;
} u;
/** Memory Mapping buffer */
multiboot_uint32_t mmap_length;
multiboot_uint32_t mmap_addr;
/** Drive Info buffer */
multiboot_uint32_t drives_length;
multiboot_uint32_t drives_addr;
/** ROM configuration table */
multiboot_uint32_t config_table;
/** Boot Loader Name */
multiboot_uint32_t boot_loader_name;
/** APM table */
multiboot_uint32_t apm_table;
/** Video */
multiboot_uint32_t vbe_control_info;
multiboot_uint32_t vbe_mode_info;
multiboot_uint16_t vbe_mode;
multiboot_uint16_t vbe_interface_seg;
multiboot_uint16_t vbe_interface_off;
multiboot_uint16_t vbe_interface_len;
};
typedef struct multiboot_info multiboot_info_t;
struct multiboot_mmap_entry
{
multiboot_uint32_t size;
multiboot_uint64_t addr;
multiboot_uint64_t len;
#define MULTIBOOT_MEMORY_AVAILABLE 1
#define MULTIBOOT_MEMORY_RESERVED 2
multiboot_uint32_t type;
} __attribute__((packed));
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
struct multiboot_mod_list
{
/** the memory used goes from bytes mod start to mod end-1 inclusive */
multiboot_uint32_t mod_start;
multiboot_uint32_t mod_end;
/** Module command line */
multiboot_uint32_t cmdline;
/** padding to take it to 16 bytes (must be zero) */
multiboot_uint32_t pad;
};
typedef struct multiboot_mod_list multiboot_module_t;
/// Pointer to multiboot structure
/// This pointer is declared at set by entry.asm
extern multiboot_info_t* mb_info;
#endif