// 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_* #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; u16 offset; u16 segment; 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; u64 device_path; u8 reserved3; u8 checksum; } 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__) /**************************************************************** * 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_CDROM_READ 1 #define CMD_CDEMU_READ 2 /**************************************************************** * Global storage ****************************************************************/ struct chs_s { u16 heads; // # heads u16 cylinders; // # cylinders u16 spt; // # sectors / track }; struct ata_channel_s { u16 iobase1; // IO Base 1 u16 iobase2; // IO Base 2 u16 pci_bdf; u8 irq; // IRQ }; struct ata_device_s { u8 type; // Detected type of ata (ata/atapi/none/unknown) u8 device; // Detected type of attached devices (hd/cd/none) u8 removable; // Removable device flag u16 blksize; // block size u8 version; // ATA/ATAPI version 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 }; struct ata_s { // ATA channels info struct ata_channel_s channels[CONFIG_MAX_ATA_INTERFACES]; // ATA devices info struct ata_device_s devices[CONFIG_MAX_ATA_DEVICES]; // // map between bios hd/cd id and ata channels u8 cdcount; u8 idmap[2][CONFIG_MAX_ATA_DEVICES]; }; /**************************************************************** * Function defs ****************************************************************/ // ata.c extern struct ata_s ATA; int ata_cmd_data(struct disk_op_s *op); int cdrom_read(struct disk_op_s *op); int cdrom_read_512(struct disk_op_s *op); int ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen , u32 length, void *buf_fl); void ata_reset(int driveid); void hard_drive_setup(); void map_drive(int driveid); // floppy.c extern u8 FloppyCount; extern struct floppy_ext_dbt_s diskette_param_table2; void floppy_drive_setup(); void floppy_13(struct bregs *regs, u8 drive); void floppy_tick(); // disk.c void disk_13(struct bregs *regs, u8 device); void disk_13XX(struct bregs *regs, u8 device); // cdrom.c void cdrom_13(struct bregs *regs, u8 device); void cdemu_13(struct bregs *regs); void cdemu_134b(struct bregs *regs); int cdrom_boot(int cdid); #endif // disk.h