source: trunk/hal/x86_64/hal_multiboot.h @ 36

/*
 * hal_multiboot.h - Multiboot-specific values and structures
 * 
 * Copyright (c) 2017 Maxime Villard
 * 
 * This file is part of ALMOS-MKH.
 *
 * ALMOS-MKH 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; version 2.0 of the License.
 *
 * ALMOS-MKH 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 ALMOS-MKH.; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

/*
 * Multiboot header structure.
 */
#define MULTIBOOT_HEADER_MAGIC          0x1BADB002
#define MULTIBOOT_HEADER_MODS_ALIGNED   0x00000001
#define MULTIBOOT_HEADER_WANT_MEMORY    0x00000002
#define MULTIBOOT_HEADER_HAS_VBE        0x00000004
#define MULTIBOOT_HEADER_HAS_ADDR       0x00010000

#ifndef x86_ASM
struct multiboot_header {
        uint32_t        mh_magic;
        uint32_t        mh_flags;
        uint32_t        mh_checksum;

        /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
        paddr_t         mh_header_addr;
        paddr_t         mh_load_addr;
        paddr_t         mh_load_end_addr;
        paddr_t         mh_bss_end_addr;
        paddr_t         mh_entry_addr;

        /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE. */
        uint32_t        mh_mode_type;
        uint32_t        mh_width;
        uint32_t        mh_height;
        uint32_t        mh_depth;
};
#endif

/*
 * Multiboot information structure.
 */
#define MULTIBOOT_INFO_MAGIC            0x2BADB002
#define MULTIBOOT_INFO_HAS_MEMORY       0x00000001
#define MULTIBOOT_INFO_HAS_BOOT_DEVICE  0x00000002
#define MULTIBOOT_INFO_HAS_CMDLINE      0x00000004
#define MULTIBOOT_INFO_HAS_MODS         0x00000008
#define MULTIBOOT_INFO_HAS_AOUT_SYMS    0x00000010
#define MULTIBOOT_INFO_HAS_ELF_SYMS     0x00000020
#define MULTIBOOT_INFO_HAS_MMAP         0x00000040
#define MULTIBOOT_INFO_HAS_DRIVES       0x00000080
#define MULTIBOOT_INFO_HAS_CONFIG_TABLE 0x00000100
#define MULTIBOOT_INFO_HAS_LOADER_NAME  0x00000200
#define MULTIBOOT_INFO_HAS_APM_TABLE    0x00000400
#define MULTIBOOT_INFO_HAS_VBE          0x00000800

#define MULTIBOOT_INFO_SIZE             92

/* Offsets into the structure */
#define MB_MI_FLAGS             0
#define MB_MI_MMAP_LENGTH       44
#define MB_MI_MMAP_ADDR         48
#define MB_MI_LOADER_NAME       64

#ifndef x86_ASM
typedef uint32_t mb_paddr_t;

struct multiboot_info {
        uint32_t        mi_flags;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_MEMORY. */
        uint32_t        mi_mem_lower;
        uint32_t        mi_mem_upper;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_BOOT_DEVICE. */
        uint8_t         mi_boot_device_part3;
        uint8_t         mi_boot_device_part2;
        uint8_t         mi_boot_device_part1;
        uint8_t         mi_boot_device_drive;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_CMDLINE. */
        mb_paddr_t      mi_cmdline;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_MODS. */
        uint32_t        mi_mods_count;
        mb_paddr_t      mi_mods_addr;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_{AOUT,ELF}_SYMS. */
        uint32_t        mi_elfshdr_num;
        uint32_t        mi_elfshdr_size;
        mb_paddr_t      mi_elfshdr_addr;
        uint32_t        mi_elfshdr_shndx;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_MMAP. */
        uint32_t        mi_mmap_length;
        mb_paddr_t      mi_mmap_addr;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_DRIVES. */
        uint32_t        mi_drives_length;
        mb_paddr_t      mi_drives_addr;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_CONFIG_TABLE. */
        mb_paddr_t      unused_mi_config_table;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_LOADER_NAME. */
        mb_paddr_t      mi_loader_name;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_APM. */
        mb_paddr_t      unused_mi_apm_table;

        /* Valid if mi_flags sets MULTIBOOT_INFO_HAS_VBE. */
        mb_paddr_t      unused_mi_vbe_control_info;
        mb_paddr_t      unused_mi_vbe_mode_info;
        mb_paddr_t      unused_mi_vbe_interface_seg;
        mb_paddr_t      unused_mi_vbe_interface_off;
        uint32_t        unused_mi_vbe_interface_len;
};

/*
 * Drive information. This describes an entry in the drives table as
 * pointed to by mi_drives_addr.
 */
struct multiboot_drive {
        uint32_t        md_length;
        uint8_t         md_number;
        uint8_t         md_mode;
        uint16_t        md_cylinders;
        uint8_t         md_heads;
        uint8_t         md_sectors;

        /* The variable-sized 'ports' field comes here, so this structure
         * can be longer. */
};

/*
 * Memory mapping. This describes an entry in the memory mappings table
 * as pointed to by mi_mmap_addr.
 *
 * Be aware that mm_size specifies the size of all other fields *except*
 * for mm_size. In order to jump between two different entries, you
 * have to count mm_size + 4 bytes.
 */
struct multiboot_mmap {
        uint32_t        mm_size;
        uint64_t        mm_base_addr;
        uint64_t        mm_length;
        uint32_t        mm_type;
} __packed;

/*
 * Modules. This describes an entry in the modules table as pointed
 * to by mi_mods_addr.
 */

struct multiboot_module {
        uint32_t        mmo_start;
        uint32_t        mmo_end;
        mb_paddr_t      mmo_string;
        uint32_t        mmo_reserved;
};
#endif