#ifndef ARCH_X86_MULTIBOOT2_H
#define ARCH_X86_MULTIBOOT2_H

#include <stdint.h>

/*  How many bytes from the start of the file we search for the header. */
#define MULTIBOOT_SEARCH                        32768
#define MULTIBOOT_HEADER_ALIGN                  8

/*  The magic field should contain this. */
#define MULTIBOOT2_HEADER_MAGIC                 0xe85250d6

/*  This should be in %eax. */
#define MULTIBOOT2_BOOTLOADER_MAGIC             0x36d76289

/*  Alignment of multiboot modules. */
#define MULTIBOOT_MOD_ALIGN                     0x00001000

/*  Alignment of the multiboot info structure. */
#define MULTIBOOT_INFO_ALIGN                    0x00000008

/* Tags found in the Multiboot2 information structure */
#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

struct multiboot_tag {
    uint32_t type;
    uint32_t size;
};

struct multiboot_tag_string {
    uint32_t type;
    uint32_t size;
    char string[0];
};

struct multiboot_tag_basic_meminfo {
    uint32_t type;
    uint32_t size;
    uint32_t mem_lower;
    uint32_t mem_upper;
};

struct multiboot_mmap_entry {
    uint64_t addr;
    uint64_t len;
    uint32_t type;
    uint32_t zero;
};

struct multiboot_tag_mmap {
    uint32_t type;
    uint32_t size;
    uint32_t entry_size;
    uint32_t entry_version;
    struct multiboot_mmap_entry entries[];
};

struct multiboot_tag_module {
    uint32_t type;
    uint32_t size;
    uint32_t mod_start;
    uint32_t mod_end;
    char string[0];
};

struct multiboot_tag_framebuffer {
    uint32_t type;
    uint32_t size;
    uint64_t framebuffer_addr;
    uint32_t framebuffer_pitch;
    uint32_t framebuffer_width;
    uint32_t framebuffer_height;
    uint8_t  framebuffer_bpp;
    uint8_t  framebuffer_type;
    uint8_t  reserved;
};

#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

#endif