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// Standard disk BIOS definitions.
#ifndef __DISK_H
#define __DISK_H
#include "types.h" // u8
#define DISK_RET_SUCCESS 0x00
#define DISK_RET_EPARAM 0x01
#define DISK_RET_EADDRNOTFOUND 0x02
#define DISK_RET_EWRITEPROTECT 0x03
#define DISK_RET_ECHANGED 0x06
#define DISK_RET_EBOUNDARY 0x09
#define DISK_RET_EBADTRACK 0x0c
#define DISK_RET_ECONTROLLER 0x20
#define DISK_RET_ETIMEOUT 0x80
#define DISK_RET_ENOTLOCKED 0xb0
#define DISK_RET_ELOCKED 0xb1
#define DISK_RET_ENOTREMOVABLE 0xb2
#define DISK_RET_ETOOMANYLOCKS 0xb4
#define DISK_RET_EMEDIA 0xC0
#define DISK_RET_ENOTREADY 0xAA
/****************************************************************
* Interface structs
****************************************************************/
// Bios disk structures.
struct int13ext_s {
u8 size;
u8 reserved;
u16 count;
struct segoff_s data;
u64 lba;
} PACKED;
// DPTE definition
struct dpte_s {
u16 iobase1;
u16 iobase2;
u8 prefix;
u8 unused;
u8 irq;
u8 blkcount;
u8 dma;
u8 pio;
u16 options;
u16 reserved;
u8 revision;
u8 checksum;
};
// Disk Physical Table definition
struct int13dpt_s {
u16 size;
u16 infos;
u32 cylinders;
u32 heads;
u32 spt;
u64 sector_count;
u16 blksize;
struct segoff_s dpte;
u16 key;
u8 dpi_length;
u8 reserved1;
u16 reserved2;
u8 host_bus[4];
u8 iface_type[8];
u64 iface_path;
union {
struct {
u64 device_path;
u8 reserved3;
u8 checksum;
} phoenix;
struct {
u64 device_path[2];
u8 reserved3;
u8 checksum;
} t13;
};
} PACKED;
// Floppy info
struct fdpt_s {
u16 cylinders;
u8 heads;
u8 a0h_signature;
u8 phys_sectors;
u16 precompensation;
u8 reserved;
u8 drive_control_byte;
u16 phys_cylinders;
u8 phys_heads;
u16 landing_zone;
u8 sectors;
u8 checksum;
} PACKED;
// Floppy "Disk Base Table"
struct floppy_dbt_s {
u8 specify1;
u8 specify2;
u8 shutoff_ticks;
u8 bps_code;
u8 sectors;
u8 interblock_len;
u8 data_len;
u8 gap_len;
u8 fill_byte;
u8 settle_time;
u8 startup_time;
} PACKED;
struct floppy_ext_dbt_s {
struct floppy_dbt_s dbt;
// Extra fields
u8 max_track;
u8 data_rate;
u8 drive_type;
} PACKED;
/****************************************************************
* Master boot record
****************************************************************/
struct packed_chs_s {
u8 heads;
u8 sptcyl;
u8 cyllow;
} PACKED;
struct partition_s {
u8 status;
struct packed_chs_s first;
u8 type;
struct packed_chs_s last;
u32 lba;
u32 count;
} PACKED;
struct mbr_s {
u8 code[440];
// 0x01b8
u32 diskseg;
// 0x01bc
u16 null;
// 0x01be
struct partition_s partitions[4];
// 0x01fe
u16 signature;
} PACKED;
#define MBR_SIGNATURE 0xaa55
/****************************************************************
* ElTorito CDROM interface
****************************************************************/
struct eltorito_s {
u8 size;
u8 media;
u8 emulated_drive;
u8 controller_index;
u32 ilba;
u16 device_spec;
u16 buffer_segment;
u16 load_segment;
u16 sector_count;
struct packed_chs_s chs;
} PACKED;
#endif // disk.h
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