#ifndef ATAGS_H
#define ATAGS_H

#include <stdint.h>

#define ATAG_NONE      0x00000000
#define ATAG_CORE      0x54410001
#define ATAG_MEM       0x54410002
#define ATAG_VIDEOTEXT 0x54410003
#define ATAG_RAMDISK   0x54410004
#define ATAG_INITRD2   0x54420005
#define ATAG_SERIAL    0x54410006
#define ATAG_REVISION  0x54410007
#define ATAG_VIDEOLFB  0x54410008
#define ATAG_CMDLINE   0x54410009

struct atag_header
{
  uint32_t size;
  uint32_t tag;
};

struct atag_core
{
  uint32_t flags;
  uint32_t pagesize;
  uint32_t rootdev;
};

struct atag_mem
{
  uint32_t size;
  uint32_t start;
};

struct atag_videotext
{
  uint8_t  x;
  uint8_t  y;
  uint16_t video_page;
  uint8_t  video_mode;
  uint8_t  video_cols;
  uint16_t video_ega_bx;
  uint8_t  video_lines;
  uint8_t  video_isvga;
  uint16_t video_points;
};

struct atag_ramdisk
{
  uint32_t flags;
  uint32_t size;
  uint32_t start;
};

struct atag_initrd2
{
  uint32_t start;
  uint32_t size;
};

struct atag_serialnr
{
  uint32_t low;
  uint32_t high;
};

struct atag_revision
{
  uint32_t rev;
};

struct atag_videolfb
{
  uint16_t lfb_width;
  uint16_t lfb_height;
  uint16_t lfb_depth;
  uint16_t lfb_linelength;
  uint32_t lfb_base;
  uint32_t lfb_size;
  uint8_t  red_size;
  uint8_t  red_pos;
  uint8_t  green_size;
  uint8_t  green_pos;
  uint8_t  blue_size;
  uint8_t  blue_pos;
  uint8_t  rsvd_size;
  uint8_t  rsvd_pos;
};

struct atag_cmdline
{
  char cmdline[1];
};

uint32_t find_memory_size(struct atag_header *atags);

void print_tag(struct atag_header *tag);

void print_atags(struct atag_header *atags);

#endif // ATAGS_H