/*
** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the MIT License.
*/
#ifndef ATARI_PARTITION_H
#define ATARI_PARTITION_H

/*
 * An extented partition scheme exists, (several actually), cf.
 * http://people.debian.org/~smarenka/d-i/atari-fdisk-README
 * boot sector stuff:
 * http://leonard.oxg.free.fr/articles/multi_atari/multi_atari.html
 */

#include "SupportDefs.h"
#include "ByteOrder.h"

/* this one is BIG endian */
struct atari_partition_entry {
#define ATARI_PART_EXISTS       0x01
#define ATARI_PART_BOOTABLE     0x80
        uint8   flags;
        /* some known types */
#define ATARI_PART_TYPE_GEM 'G', 'E', 'M'
#define ATARI_PART_TYPE_LNX 'L', 'N', 'X'
#define ATARI_PART_TYPE_OS9 'O', 'S', '9'
        /* the one we'll use */
#define ATARI_PART_TYPE_BFS 'B', 'F', 'S'
        char    id[3];
        uint32  start;
        uint32  size;

        uint8 Flags() const { return flags; }
        uint32 Start() const { return B_BENDIAN_TO_HOST_INT32(start); }
        uint32 Size() const { return B_BENDIAN_TO_HOST_INT32(size); }
} _PACKED ;


/* this one is BIG endian */
struct atari_root_block {
        uint8   bootcode[0x1b6];
        uint16  cylinder_count;
        uint8   head_count;
        uint8   _reserved_1[1];
        uint16  reduced_write_current_cylinder;
        uint16  write_precomp_cynlinder;
        uint8   landing_zone;
        uint8   seek_rate_code;
        uint8   interleave_factor;
        uint8   sectors_per_track;
        uint32  maximum_partition_size; /* in sectors (in clusters) */
        struct atari_partition_entry    partitions[4];
        uint32  bad_sector_list_start;
        uint32  bad_sector_list_count;
#define ATARI_BOOTABLE_MAGIC    0x1234
        uint16  checksum; /* checksum? 0x1234 for bootable */

        uint32 MaxPartitionSize() const { return B_BENDIAN_TO_HOST_INT16(maximum_partition_size); }
        uint32 BadSectorsStart() const { return B_BENDIAN_TO_HOST_INT32(bad_sector_list_start); }
        uint32 BadSectorsCount() const { return B_BENDIAN_TO_HOST_INT32(bad_sector_list_count); }
        uint16 Checksum() const { return B_BENDIAN_TO_HOST_INT16(checksum); }
} _PACKED ;

/************* bad blocks *************/

struct bad_block_entry {
};

struct bad_block_block {
};

/************* partition block *************/

/* this one is BIG endian, but with LITTLE endian fields! marked LE */
/* this is part of the filesystem... */
struct atari_boot_block {
        uint16  branch; /* branch code */
        char    volume_id[6];
        uint8   disk_id[3];
        uint16  bytes_per_sector;       /* LE */
        uint8   sectors_per_cluster;
        uint16  reserved_sectors;       /* LE */
        uint8   fat_count;
        uint16  entries_in_root_dir;    /* LE */
        uint16  sector_count;           /* LE */
        uint8   media_descriptor;
        uint16  sectors_per_fat;        /* LE */
        uint16  sectors_per_track;      /* LE */
        uint16  side_count;             /* LE */
        uint16  hidden_sector_count;    /* LE */
        /* boot code... */
        uint16  execflag;
        uint16  loadmode;
        uint16  first_sector;
        uint16  num_sectors;
        uint32  load_addr;
        uint32  fat_buffer;
#define ATARI_BB_FILENAME_SZ (0x003a - 0x002e)
        char    filename[ATARI_BB_FILENAME_SZ];
#define ATARI_BB_BOOTCODE_SZ (0x01fe - 0x003a)
        uint8   bootcode[ATARI_BB_BOOTCODE_SZ];
        uint16  checksum;       /* 0x1234 if bootable */
};



#endif  /* ATARI_PARTITION_H */