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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000 Free Software Foundation, Inc.
*
* 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* The structure type "mod_list" is used by the "multiboot_info" structure.
*/
#ifndef MBOOT_MB_INFO_H
#define MBOOT_MB_INFO_H
#include <inttypes.h>
struct mod_list {
/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
uint32_t mod_start;
uint32_t mod_end;
/* Module command line */
uint32_t cmdline;
/* padding to take it to 16 bytes (must be zero) */
uint32_t pad;
};
/*
* INT-15, AX=E820 style "AddressRangeDescriptor"
* ...with a "size" parameter on the front which is the structure size - 4,
* pointing to the next one, up until the full buffer length of the memory
* map has been reached.
*/
struct AddrRangeDesc {
uint32_t size;
uint64_t BaseAddr;
uint64_t Length;
uint32_t Type;
/* unspecified optional padding... */
} __attribute__ ((packed));
/* usable memory "Type", all others are reserved. */
#define MB_ARD_MEMORY 1
/* Drive Info structure. */
struct drive_info {
/* The size of this structure. */
uint32_t size;
/* The BIOS drive number. */
uint8_t drive_number;
/* The access mode (see below). */
uint8_t drive_mode;
/* The BIOS geometry. */
uint16_t drive_cylinders;
uint8_t drive_heads;
uint8_t drive_sectors;
/* The array of I/O ports used for the drive. */
uint16_t drive_ports[0];
};
/* Drive Mode. */
#define MB_DI_CHS_MODE 0
#define MB_DI_LBA_MODE 1
/* APM BIOS info. */
struct apm_info {
uint16_t version;
uint16_t cseg;
uint32_t offset;
uint16_t cseg_16;
uint16_t dseg_16;
uint16_t cseg_len;
uint16_t cseg_16_len;
uint16_t dseg_16_len;
};
/*
* MultiBoot Info description
*
* This is the struct passed to the boot image. This is done by placing
* its address in the EAX register.
*/
struct multiboot_info {
/* MultiBoot info version number */
uint32_t flags;
/* Available memory from BIOS */
uint32_t mem_lower;
uint32_t mem_upper;
/* "root" partition */
uint32_t boot_device;
/* Kernel command line */
uint32_t cmdline;
/* Boot-Module list */
uint32_t mods_count;
uint32_t mods_addr;
union {
struct {
/* (a.out) Kernel symbol table info */
uint32_t tabsize;
uint32_t strsize;
uint32_t addr;
uint32_t pad;
} a;
struct {
/* (ELF) Kernel section header table */
uint32_t num;
uint32_t size;
uint32_t addr;
uint32_t shndx;
} e;
} syms;
/* Memory Mapping buffer */
uint32_t mmap_length;
uint32_t mmap_addr;
/* Drive Info buffer */
uint32_t drives_length;
uint32_t drives_addr;
/* ROM configuration table */
uint32_t config_table;
/* Boot Loader Name */
uint32_t boot_loader_name;
/* APM table */
uint32_t apm_table;
/* Video */
uint32_t vbe_control_info;
uint32_t vbe_mode_info;
uint16_t vbe_mode;
uint16_t vbe_interface_seg;
uint16_t vbe_interface_off;
uint16_t vbe_interface_len;
};
/*
* Flags to be set in the 'flags' parameter above
*/
/* is there basic lower/upper memory information? */
#define MB_INFO_MEMORY 0x00000001
/* is there a boot device set? */
#define MB_INFO_BOOTDEV 0x00000002
/* is the command-line defined? */
#define MB_INFO_CMDLINE 0x00000004
/* are there modules to do something with? */
#define MB_INFO_MODS 0x00000008
/* These next two are mutually exclusive */
/* is there a symbol table loaded? */
#define MB_INFO_AOUT_SYMS 0x00000010
/* is there an ELF section header table? */
#define MB_INFO_ELF_SHDR 0x00000020
/* is there a full memory map? */
#define MB_INFO_MEM_MAP 0x00000040
/* Is there drive info? */
#define MB_INFO_DRIVE_INFO 0x00000080
/* Is there a config table? */
#define MB_INFO_CONFIG_TABLE 0x00000100
/* Is there a boot loader name? */
#define MB_INFO_BOOT_LOADER_NAME 0x00000200
/* Is there a APM table? */
#define MB_INFO_APM_TABLE 0x00000400
/* Is there video information? */
#define MB_INFO_VIDEO_INFO 0x00000800
/*
* The following value must be present in the EAX register.
*/
#define MULTIBOOT_VALID 0x2BADB002
#endif /* MBOOT_MB_INFO_H */
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