/*

mkdos shell tool

Initialize FAT16 or FAT32 partitions, FAT12 floppy disks not supported

Copyright (c) 2002 Marcus Overhagen <marcus@overhagen.de>, Haiku project

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Copyright 2024, Haiku, Inc. All rights reserved.

*/
#ifndef MKDOS_H
#define MKDOS_H


#ifdef FS_SHELL
#include "sys/types.h"
#include "fssh_api_wrapper.h"
#else
#include <SupportDefs.h>
#include <disk_device_manager.h>
#endif


struct initialize_parameters {
        uint32  fatBits;
        uint32  flags;
        bool    verbose;
};


#ifdef __cplusplus
extern "C" 
{
#endif
status_t
_dosfs_initialize(int fd, partition_id partitionID, const char* name, const char* parameterString,
        off_t partitionSize, disk_job_id job);
status_t
_dosfs_uninitialize(int fd, partition_id partitionID, off_t partitionSize, uint32 blockSize,
        disk_job_id job);
#ifdef __cplusplus
}
#endif


#ifdef MKDOS

#define ATTRIBUTE_PACKED __attribute__((packed))

struct bootsector1216 {
        uint8   BS_jmpBoot[3];
        uint8   BS_OEMName[8];
        uint16  BPB_BytsPerSec; 
        uint8   BPB_SecPerClus;
        uint16  BPB_RsvdSecCnt;
        uint8   BPB_NumFATs;
        uint16  BPB_RootEntCnt;
        uint16  BPB_TotSec16;
        uint8   BPB_Media;
        uint16  BPB_FATSz16;
        uint16  BPB_SecPerTrk;
        uint16  BPB_NumHeads;
        uint32  BPB_HiddSec;
        uint32  BPB_TotSec32;
        uint8   BS_DrvNum;
        uint8   BS_Reserved1;
        uint8   BS_BootSig;
        uint8   BS_VolID[4];
        uint8   BS_VolLab[11];
        uint8   BS_FilSysType[8];
        uint8   bootcode[448];
        uint16  signature;
} ATTRIBUTE_PACKED;

struct bootsector32 {
        uint8   BS_jmpBoot[3];
        uint8   BS_OEMName[8];
        uint16  BPB_BytsPerSec;
        uint8   BPB_SecPerClus;
        uint16  BPB_RsvdSecCnt;
        uint8   BPB_NumFATs;
        uint16  BPB_RootEntCnt;
        uint16  BPB_TotSec16;
        uint8   BPB_Media;
        uint16  BPB_FATSz16;
        uint16  BPB_SecPerTrk;
        uint16  BPB_NumHeads;
        uint32  BPB_HiddSec;
        uint32  BPB_TotSec32; 
        uint32  BPB_FATSz32;
        uint16  BPB_ExtFlags;
        uint16  BPB_FSVer;
        uint32  BPB_RootClus;
        uint16  BPB_FSInfo;
        uint16  BPB_BkBootSec;
        uint8   BPB_Reserved[12];
        uint8   BS_DrvNum;
        uint8   BS_Reserved1;
        uint8   BS_BootSig;
        uint8   BS_VolID[4];
        uint8   BS_VolLab[11];
        uint8   BS_FilSysType[8];
        uint8   bootcode[420];
        uint16  signature;
} ATTRIBUTE_PACKED;

struct fsinfosector32 {
        uint32  FSI_LeadSig;
        uint8   FSI_Reserved1[480];
        uint32  FSI_StrucSig;
        uint32  FSI_Free_Count;
        uint32  FSI_Nxt_Free;
        uint8   FSI_Reserved2[12];
        uint32  FSI_TrailSig;
} ATTRIBUTE_PACKED;


// a FAT directory entry
struct fatdirent {
        uint8 Name[11];
        uint8 Attr;
        uint8 NTRes;
        uint8 CrtTimeTenth;
        uint16 CrtTime;
        uint16 CrtDate;
        uint16 LstAccDate;
        uint16 FstClusHI;
        uint16 WrtTime;
        uint16 WrtDate;
        uint16 FstClusLO;
        uint32 FileSize;
} ATTRIBUTE_PACKED;


//maximum size of a 2,88 MB floppy 
#define FLOPPY_MAX_SIZE (2 * 80 * 36 * 512)

//maximum size of a cluster
#define CLUSTER_MAX_SIZE 32768
#define FAT12_CLUSTER_MAX_SIZE 4084


//limits
#define FAT12_MAX_CLUSTER_COUNT 4084LL
#define FAT16_MAX_CLUSTER_COUNT 65524LL
#define FAT32_MAX_CLUSTER_COUNT 0x0ffffff4LL


#define BOOTJMP_START_OFFSET 0x00
uint8 bootjmp[] = {
        0xeb, 0x7e, 0x90
};

#define BOOTCODE_START_OFFSET 0x80
uint8 bootcode[] = {
        0x31, 0xc0, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 
        0xd8, 0xb4, 0x0e, 0x31, 0xdb, 0xbe, 0x00, 0x7d,
        0xfc, 0xac, 0x08, 0xc0, 0x74, 0x04, 0xcd, 0x10, 
        0xeb, 0xf7, 0xb4, 0x00, 0xcd, 0x16, 0xcd, 0x19,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x53, 0x6f, 0x72, 0x72, 0x79, 0x2c, 0x20, 0x74, 
        0x68, 0x69, 0x73, 0x20, 0x64, 0x69, 0x73, 0x6b,
        0x20, 0x69, 0x73, 0x20, 0x6e, 0x6f, 0x74, 0x20, 
        0x62, 0x6f, 0x6f, 0x74, 0x61, 0x62, 0x6c, 0x65,
        0x2e, 0x0d, 0x0a, 0x50, 0x6c, 0x65, 0x61, 0x73, 
        0x65, 0x20, 0x70, 0x72, 0x65, 0x73, 0x73, 0x20,
        0x61, 0x6e, 0x79, 0x20, 0x6b, 0x65, 0x79, 0x20, 
        0x74, 0x6f, 0x20, 0x72, 0x65, 0x62, 0x6f, 0x6f,
        0x74, 0x2e, 0x0d, 0x0a, 0x00
};

#define BOOT_SECTOR_NUM 0
#define FSINFO_SECTOR_NUM 1
#define BACKUP_SECTOR_NUM 6
#define FAT32_ROOT_CLUSTER 2

#endif // MKDOS


#endif // MKDOS_H