#ifndef MBR_H
#define MBR_H

/* This file defines the interface to the encapsulated binary file
   produced by ld. */

extern u_int8_t _binary_mbr_b_start[];
extern u_int8_t _binary_mbr_b_end[];
extern u_int8_t _binary_mbr_b_size[];

#define MBR_START _binary_mbr_b_start
#define MBR_END _binary_mbr_b_end
#define MBR_SIZE ((unsigned long)_binary_mbr_b_size)

extern u_int8_t _binary_y2k_b_start[];
extern u_int8_t _binary_y2k_b_end[];
extern u_int8_t _binary_y2k_b_size[];

#define Y2K_START _binary_y2k_b_start
#define Y2K_END _binary_y2k_b_end
#define Y2K_SIZE ((unsigned long)_binary_y2k_b_size)

/* This defines the format of the parameters in the MBR for versions 0
   and 1.  This structure is now frozen. */
struct mbr_params_v1
{
  u_int8_t sig[6]; /* This must be at the top */
#define MP_V1_SIG "NDTmbr"
  u_int8_t mp_reserved1;
  u_int8_t ver_compat;
#define MP_V1_VERSION 1 /* A bit silly really. */
  u_int8_t variant;
  u_int8_t version;
#define MP_VARIANT_Y2K 1
#define MP_VERSION_Y2K 1
  u_int8_t flags;
#define MP_FLAG_EN1 1
#define MP_FLAG_EN2 2
#define MP_FLAG_EN3 4
#define MP_FLAG_EN4 8
#define MP_FLAG_ENF 16
#define MP_FLAG_ENA 128
  u_int8_t deflt;
#define MP_DEFLT_BITS 7
#define MP_DEFLT_ISHIFT 64
#define MP_DEFLT_IKEY 128
  u_int8_t delay;
#define MP_V1_DELAY_INT 0xff
  u_int8_t drive;
#define MP_DRIVE_UNSET 0xff
};

/* This defines the version 2 parameters.  It must match the code
   (mbr.S).  Everything uses u_int8_t so that packing will work
   (unless something strange happens).  Our 16 bit field is made up of
   two 8 bit fields.  This gets round endian problems too (we actually
   support running the installer on the wrong hardware).  The
   structure sits just before the partition table. */
struct mbr_params_v2
{
  u_int8_t flags;
  u_int8_t deflt;
#define MP_V2_DELAY_INT 0xffff
  u_int8_t delay[2];
  u_int8_t drive;
  u_int8_t variant;
  u_int8_t ver_compat; /* Versions 0,1 are illegal here. */
  u_int8_t version;    /* Versions 0,1 are illegal here. */
  u_int8_t sig[2];
  /* The signature has the following properties:
   *   It was generated randomly.
   *   It does not match sensible i386 instructions.
   *   It is an invalid parameter pointer for the V1 layout which was
   *     in this location.
   */
#define MP_V2_SIG {0xef,0x17}
};

#endif