208 lines
4.9 KiB
C
208 lines
4.9 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2000 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* The structure type "mod_list" is used by the "multiboot_info" structure.
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*/
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#ifndef MBOOT_MB_INFO_H
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#define MBOOT_MB_INFO_H
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#include <inttypes.h>
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struct mod_list {
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/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
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uint32_t mod_start;
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uint32_t mod_end;
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/* Module command line */
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uint32_t cmdline;
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/* padding to take it to 16 bytes (must be zero) */
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uint32_t pad;
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};
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/*
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* INT-15, AX=E820 style "AddressRangeDescriptor"
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* ...with a "size" parameter on the front which is the structure size - 4,
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* pointing to the next one, up until the full buffer length of the memory
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* map has been reached.
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*/
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struct AddrRangeDesc {
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uint32_t size;
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uint64_t BaseAddr;
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uint64_t Length;
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uint32_t Type;
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/* unspecified optional padding... */
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} __attribute__ ((packed));
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/* usable memory "Type", all others are reserved. */
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#define MB_ARD_MEMORY 1
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/* Drive Info structure. */
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struct drive_info {
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/* The size of this structure. */
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uint32_t size;
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/* The BIOS drive number. */
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uint8_t drive_number;
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/* The access mode (see below). */
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uint8_t drive_mode;
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/* The BIOS geometry. */
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uint16_t drive_cylinders;
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uint8_t drive_heads;
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uint8_t drive_sectors;
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/* The array of I/O ports used for the drive. */
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uint16_t drive_ports[0];
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};
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/* Drive Mode. */
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#define MB_DI_CHS_MODE 0
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#define MB_DI_LBA_MODE 1
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/* APM BIOS info. */
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struct apm_info {
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uint16_t version;
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uint16_t cseg;
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uint32_t offset;
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uint16_t cseg_16;
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uint16_t dseg_16;
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uint16_t cseg_len;
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uint16_t cseg_16_len;
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uint16_t dseg_16_len;
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};
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/*
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* MultiBoot Info description
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*
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* This is the struct passed to the boot image. This is done by placing
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* its address in the EAX register.
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*/
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struct multiboot_info {
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/* MultiBoot info version number */
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uint32_t flags;
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/* Available memory from BIOS */
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uint32_t mem_lower;
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uint32_t mem_upper;
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/* "root" partition */
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uint32_t boot_device;
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/* Kernel command line */
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uint32_t cmdline;
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/* Boot-Module list */
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uint32_t mods_count;
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uint32_t mods_addr;
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union {
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struct {
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/* (a.out) Kernel symbol table info */
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uint32_t tabsize;
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uint32_t strsize;
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uint32_t addr;
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uint32_t pad;
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} a;
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struct {
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/* (ELF) Kernel section header table */
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uint32_t num;
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uint32_t size;
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uint32_t addr;
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uint32_t shndx;
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} e;
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} syms;
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/* Memory Mapping buffer */
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uint32_t mmap_length;
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uint32_t mmap_addr;
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/* Drive Info buffer */
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uint32_t drives_length;
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uint32_t drives_addr;
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/* ROM configuration table */
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uint32_t config_table;
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/* Boot Loader Name */
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uint32_t boot_loader_name;
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/* APM table */
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uint32_t apm_table;
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/* Video */
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uint32_t vbe_control_info;
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uint32_t vbe_mode_info;
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uint16_t vbe_mode;
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uint16_t vbe_interface_seg;
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uint16_t vbe_interface_off;
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uint16_t vbe_interface_len;
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};
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/*
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* Flags to be set in the 'flags' parameter above
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*/
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/* is there basic lower/upper memory information? */
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#define MB_INFO_MEMORY 0x00000001
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/* is there a boot device set? */
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#define MB_INFO_BOOTDEV 0x00000002
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/* is the command-line defined? */
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#define MB_INFO_CMDLINE 0x00000004
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/* are there modules to do something with? */
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#define MB_INFO_MODS 0x00000008
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/* These next two are mutually exclusive */
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/* is there a symbol table loaded? */
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#define MB_INFO_AOUT_SYMS 0x00000010
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/* is there an ELF section header table? */
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#define MB_INFO_ELF_SHDR 0x00000020
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/* is there a full memory map? */
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#define MB_INFO_MEM_MAP 0x00000040
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/* Is there drive info? */
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#define MB_INFO_DRIVE_INFO 0x00000080
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/* Is there a config table? */
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#define MB_INFO_CONFIG_TABLE 0x00000100
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/* Is there a boot loader name? */
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#define MB_INFO_BOOT_LOADER_NAME 0x00000200
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/* Is there a APM table? */
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#define MB_INFO_APM_TABLE 0x00000400
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/* Is there video information? */
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#define MB_INFO_VIDEO_INFO 0x00000800
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/*
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* The following value must be present in the EAX register.
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*/
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#define MULTIBOOT_VALID 0x2BADB002
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#endif /* MBOOT_MB_INFO_H */
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