--- /dev/null
+// Definitions for X86 bios disks.
+//
+// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+#ifndef __DISK_H
+#define __DISK_H
+
+#include "types.h" // u8
+#include "config.h" // CONFIG_*
+#include "farptr.h" // struct segoff_s
+
+#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;
+
+#define GET_INT13EXT(regs,var) \
+ GET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var)
+#define SET_INT13EXT(regs,var,val) \
+ SET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var, (val))
+
+// Disk Physical Table definition
+struct int13dpt_s {
+ u16 size;
+ u16 infos;
+ u32 cylinders;
+ u32 heads;
+ u32 spt;
+ u64 sector_count;
+ u16 blksize;
+ u16 dpte_offset;
+ u16 dpte_segment;
+ 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;
+
+#define GET_INT13DPT(regs,var) \
+ GET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var)
+#define SET_INT13DPT(regs,var,val) \
+ SET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var, (val))
+
+// 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;
+
+// Helper function for setting up a return code.
+struct bregs;
+void __disk_ret(struct bregs *regs, u32 linecode, const char *fname);
+#define disk_ret(regs, code) \
+ __disk_ret((regs), (code) | (__LINE__ << 8), __func__)
+void __disk_ret_unimplemented(struct bregs *regs, u32 linecode
+ , const char *fname);
+#define disk_ret_unimplemented(regs, code) \
+ __disk_ret_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
+
+
+/****************************************************************
+ * Master boot record
+ ****************************************************************/
+
+struct packed_chs_s {
+ u8 heads;
+ u8 sptcyl;
+ u8 cyllow;
+};
+
+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
+
+
+/****************************************************************
+ * Disk command request
+ ****************************************************************/
+
+struct disk_op_s {
+ u64 lba;
+ void *buf_fl;
+ struct drive_s *drive_g;
+ u16 count;
+ u8 command;
+};
+
+#define CMD_RESET 0x00
+#define CMD_READ 0x02
+#define CMD_WRITE 0x03
+#define CMD_VERIFY 0x04
+#define CMD_FORMAT 0x05
+#define CMD_SEEK 0x07
+#define CMD_ISREADY 0x10
+
+
+/****************************************************************
+ * Global storage
+ ****************************************************************/
+
+struct chs_s {
+ u16 heads; // # heads
+ u16 cylinders; // # cylinders
+ u16 spt; // # sectors / track
+};
+
+struct drive_s {
+ u8 type; // Driver type (DTYPE_*)
+ u8 floppy_type; // Type of floppy (only for floppy drives).
+ struct chs_s lchs; // Logical CHS
+ u64 sectors; // Total sectors count
+ u32 cntl_id; // Unique id for a given driver type.
+ u8 removable; // Is media removable (currently unused)
+
+ // Info for EDD calls
+ u8 translation; // type of translation
+ u16 blksize; // block size
+ struct chs_s pchs; // Physical CHS
+};
+
+#define DISK_SECTOR_SIZE 512
+#define CDROM_SECTOR_SIZE 2048
+
+#define DTYPE_NONE 0x00
+#define DTYPE_FLOPPY 0x01
+#define DTYPE_ATA 0x02
+#define DTYPE_ATAPI 0x03
+#define DTYPE_RAMDISK 0x04
+#define DTYPE_CDEMU 0x05
+#define DTYPE_USB 0x06
+#define DTYPE_VIRTIO 0x07
+#define DTYPE_AHCI 0x08
+
+#define MAXDESCSIZE 80
+
+#define TRANSLATION_NONE 0
+#define TRANSLATION_LBA 1
+#define TRANSLATION_LARGE 2
+#define TRANSLATION_RECHS 3
+
+#define EXTTYPE_FLOPPY 0
+#define EXTTYPE_HD 1
+#define EXTTYPE_CD 2
+
+#define EXTSTART_HD 0x80
+#define EXTSTART_CD 0xE0
+
+
+/****************************************************************
+ * Function defs
+ ****************************************************************/
+
+// block.c
+extern u8 FloppyCount, CDCount;
+extern u8 *bounce_buf_fl;
+struct drive_s *getDrive(u8 exttype, u8 extdriveoffset);
+int getDriveId(u8 exttype, struct drive_s *drive_g);
+void map_floppy_drive(struct drive_s *drive_g);
+void map_hd_drive(struct drive_s *drive_g);
+void map_cd_drive(struct drive_s *drive_g);
+int process_op(struct disk_op_s *op);
+int send_disk_op(struct disk_op_s *op);
+int bounce_buf_init(void);
+
+// floppy.c
+extern struct floppy_ext_dbt_s diskette_param_table2;
+void floppy_setup(void);
+struct drive_s *init_floppy(int floppyid, int ftype);
+int find_floppy_type(u32 size);
+int process_floppy_op(struct disk_op_s *op);
+void floppy_tick(void);
+
+// cdrom.c
+extern struct drive_s *cdemu_drive_gf;
+int process_cdemu_op(struct disk_op_s *op);
+void cdemu_setup(void);
+void cdemu_134b(struct bregs *regs);
+int cdrom_boot(struct drive_s *drive_g);
+
+// ramdisk.c
+void ramdisk_setup(void);
+int process_ramdisk_op(struct disk_op_s *op);
+
+#endif // disk.h
