// Definitions for X86 bios disks. // // Copyright (C) 2008 Kevin O'Connor // // 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_BLK 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