//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#ifndef __DISK_H
#define __DISK_H
-#include "ioport.h" // outb
-#include "biosvar.h" // struct bregs
+#include "types.h" // u8
+#include "config.h" // CONFIG_*
#define DISK_RET_SUCCESS 0x00
#define DISK_RET_EPARAM 0x01
#define DISK_RET_EMEDIA 0xC0
#define DISK_RET_ENOTREADY 0xAA
+
+/****************************************************************
+ * Interface structs
+ ****************************************************************/
+
// Bios disk structures.
struct int13ext_s {
u8 size;
u16 count;
u16 offset;
u16 segment;
- u32 lba1;
- u32 lba2;
-};
+ u64 lba;
+} PACKED;
#define GET_INT13EXT(regs,var) \
GET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var)
u32 cylinders;
u32 heads;
u32 spt;
- u32 sector_count1;
- u32 sector_count2;
+ u64 sector_count;
u16 blksize;
u16 dpte_offset;
u16 dpte_segment;
u16 reserved2;
u8 host_bus[4];
u8 iface_type[8];
- u8 iface_path[8];
- u8 device_path[8];
+ u64 iface_path;
+ u64 device_path;
u8 reserved3;
u8 checksum;
-};
+} PACKED;
#define GET_INT13DPT(regs,var) \
GET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var)
u8 fill_byte;
u8 settle_time;
u8 startup_time;
-};
+} PACKED;
struct floppy_ext_dbt_s {
struct floppy_dbt_s dbt;
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__)
+
+
+/****************************************************************
+ * 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;
+ u16 count;
+ u8 driveid;
+ 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; // Detected type of drive (ata/atapi/none)
+ u8 removable; // Removable device flag
+ u16 blksize; // block size
+ int cntl_id;
+ u8 floppy_type; // Type of floppy (only for floppy drives).
+
+ char model[41];
+
+ u8 translation; // type of translation
+ struct chs_s lchs; // Logical CHS
+ struct chs_s pchs; // Physical CHS
+
+ u64 sectors; // Total sectors count
+};
+
+#define DTYPE_NONE 0x00
+#define DTYPE_FLOPPY 0x01
+#define DTYPE_ATA 0x02
+#define DTYPE_ATAPI 0x03
+#define DTYPE_RAMDISK 0x04
+
+#define TRANSLATION_NONE 0
+#define TRANSLATION_LBA 1
+#define TRANSLATION_LARGE 2
+#define TRANSLATION_RECHS 3
+
+struct drives_s {
+ // info on each internally handled drive
+ struct drive_s drives[CONFIG_MAX_DRIVES];
+ u8 drivecount;
+ //
+ // map between bios floppy/hd/cd id and driveid index into drives[]
+ u8 floppycount;
+ u8 cdcount;
+ u8 idmap[3][CONFIG_MAX_EXTDRIVE];
+};
+
+#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 struct drives_s Drives;
+void setup_translation(int driveid);
+void map_floppy_drive(int driveid);
+void map_hd_drive(int driveid);
+void map_cd_drive(int driveid);
+int send_disk_op(struct disk_op_s *op);
+void drive_setup();
+
// floppy.c
-void floppy_13(struct bregs *regs, u8 drive);
+extern struct floppy_ext_dbt_s diskette_param_table2;
+void floppy_setup();
+void addFloppy(int floppyid, int ftype, int driver);
+int find_floppy_type(u32 size);
+int process_floppy_op(struct disk_op_s *op);
void floppy_tick();
+// disk.c
+void disk_13(struct bregs *regs, u8 driveid);
+void disk_13XX(struct bregs *regs, u8 driveid);
+void cdemu_access(struct bregs *regs, u8 driveid, u16 command);
+
+// cdrom.c
+void cdrom_13(struct bregs *regs, u8 driveid);
+void cdemu_13(struct bregs *regs);
+void cdemu_134b(struct bregs *regs);
+int cdrom_boot(int cdid);
+
+// ramdisk.c
+void ramdisk_setup();
+int process_ramdisk_op(struct disk_op_s *op);
+
#endif // disk.h