#pragma once

#define MULTIBOOT_BOOTLOADER_MAGIC 0x36d76289

#define MULTIBOOT_TAG_ALIGN 8

#define MULTIBOOT_TAG_TYPE_END 0
#define MULTIBOOT_TAG_TYPE_CMDLINE 1
#define MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME 2
#define MULTIBOOT_TAG_TYPE_MODULE 3
#define MULTIBOOT_TAG_TYPE_BASIC_MEMINFO 4
#define MULTIBOOT_TAG_TYPE_BOOTDEV 5
#define MULTIBOOT_TAG_TYPE_MMAP 6
#define MULTIBOOT_TAG_TYPE_VBE 7
#define MULTIBOOT_TAG_TYPE_FRAMEBUFFER 8
#define MULTIBOOT_TAG_TYPE_ELF_SECTIONS 9
#define MULTIBOOT_TAG_TYPE_APM 10
#define MULTIBOOT_TAG_TYPE_EFI32 11
#define MULTIBOOT_TAG_TYPE_EFI64 12
#define MULTIBOOT_TAG_TYPE_SMBIOS 13
#define MULTIBOOT_TAG_TYPE_ACPI_OLD 14
#define MULTIBOOT_TAG_TYPE_ACPI_NEW 15
#define MULTIBOOT_TAG_TYPE_NETWORK 16
#define MULTIBOOT_TAG_TYPE_EFI_MMAP 17
#define MULTIBOOT_TAG_TYPE_EFI_BS 18
#define MULTIBOOT_TAG_TYPE_EFI32_IH 19
#define MULTIBOOT_TAG_TYPE_EFI64_IH 20
#define MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR 21

typedef struct {
    u8 red;
    u8 green;
    u8 blue;
} multiboot_color;

#define MULTIBOOT_MEMORY_AVAILABLE 1
#define MULTIBOOT_MEMORY_RESERVED 2
#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
#define MULTIBOOT_MEMORY_NVS 4
#define MULTIBOOT_MEMORY_BADRAM 5

typedef struct {
    u32 type;
    u32 size;
} multiboot_tag;

typedef struct {
    u32 type;
    u32 size;
    char string[0];
} multiboot_tag_string;

typedef struct {
    u32 type;
    u32 size;
    u32 mod_start;
    u32 mod_end;
    char cmdline[0];
} multiboot_tag_module;

typedef struct {
    u32 type;
    u32 size;
    u32 mem_lower;
    u32 mem_upper;
} multiboot_tag_basic_meminfo;

typedef struct {
    u32 type;
    u32 size;
    u32 biosdev;
    u32 slice;
    u32 part;
} multiboot_tag_bootdev;

typedef struct {
    u64 addr;
    u64 len;
    u32 type;
    u32 zero;
} multiboot_mmap_entry;

typedef struct {
    u32 type;
    u32 size;
    u32 entry_size;
    u32 entry_version;
    multiboot_mmap_entry entries[0];
} multiboot_tag_mmap;

typedef struct {
    u32 type;
    u32 size;

    u16 vbe_mode;
    u16 vbe_interface_seg;
    u16 vbe_interface_off;
    u16 vbe_interface_len;

    u8 vbe_control_info[512];
    u8 vbe_mode_info[256];
} multiboot_tag_vbe;

#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2

typedef struct {
    u32 type;
    u32 size;
    u64 framebuffer_addr;
    u32 framebuffer_pitch;
    u32 framebuffer_width;
    u32 framebuffer_height;
    u8 framebuffer_bpp;
    u8 framebuffer_type;
    u16 reserved;

    union {
        struct {
            u16 framebuffer_palette_num_colors;
            multiboot_color framebuffer_palette[0];
        };
        struct {
            u8 framebuffer_red_field_position;
            u8 framebuffer_red_mask_size;
            u8 framebuffer_green_field_position;
            u8 framebuffer_green_mask_size;
            u8 framebuffer_blue_field_position;
            u8 framebuffer_blue_mask_size;
        };
    };
} multiboot_tag_framebuffer;

typedef struct {
    u32 type;
    u32 size;
    u32 num;
    u32 entsize;
    u32 shndx;
    char sections[0];
} multiboot_tag_elf_sections;

typedef struct {
    u32 type;
    u32 size;
    u16 version;
    u16 cseg;
    u32 offset;
    u16 cseg_16;
    u16 dseg;
    u16 flags;
    u16 cseg_len;
    u16 cseg_16_len;
    u16 dseg_len;
} multiboot_tag_apm;

typedef struct {
    u32 type;
    u32 size;
    u32 pointer;
} multiboot_tag_efi32;

typedef struct {
    u32 type;
    u32 size;
    u64 pointer;
} multiboot_tag_efi64;

typedef struct {
    u32 type;
    u32 size;
    u8 major;
    u8 minor;
    u8 reserved[6];
    u8 tables[0];
} multiboot_tag_smbios;

typedef struct {
    u32 type;
    u32 size;
    u8 rsdp[0];
} multiboot_tag_old_acpi;

typedef struct {
    u32 type;
    u32 size;
    u8 rsdp[0];
} multiboot_tag_new_acpi;

typedef struct {
    u32 type;
    u32 size;
    u8 dhcpack[0];
} multiboot_tag_network;

typedef struct {
    u32 type;
    u32 size;
    u32 descr_size;
    u32 descr_vers;
    u8 efi_mmap[0];
} multiboot_tag_efi_mmap;

typedef struct {
    u32 type;
    u32 size;
    u32 pointer;
} multiboot_tag_efi32_ih;

typedef struct {
    u32 type;
    u32 size;
    u64 pointer;
} multiboot_tag_efi64_ih;

typedef struct {
    u32 type;
    u32 size;
    u32 load_base_addr;
} multiboot_tag_load_base_addr;