197 lines
5.1 KiB
C
197 lines
5.1 KiB
C
// Definitions for X86 bios disks.
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//
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// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
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//
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// This file may be distributed under the terms of the GNU LGPLv3 license.
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#ifndef __DISK_H
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#define __DISK_H
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#include "types.h" // u8
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#include "config.h" // CONFIG_*
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#define DISK_RET_SUCCESS 0x00
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#define DISK_RET_EPARAM 0x01
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#define DISK_RET_EADDRNOTFOUND 0x02
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#define DISK_RET_EWRITEPROTECT 0x03
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#define DISK_RET_ECHANGED 0x06
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#define DISK_RET_EBOUNDARY 0x09
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#define DISK_RET_EBADTRACK 0x0c
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#define DISK_RET_ECONTROLLER 0x20
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#define DISK_RET_ETIMEOUT 0x80
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#define DISK_RET_ENOTLOCKED 0xb0
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#define DISK_RET_ELOCKED 0xb1
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#define DISK_RET_ENOTREMOVABLE 0xb2
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#define DISK_RET_ETOOMANYLOCKS 0xb4
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#define DISK_RET_EMEDIA 0xC0
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#define DISK_RET_ENOTREADY 0xAA
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/****************************************************************
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* Interface structs
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****************************************************************/
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// Bios disk structures.
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struct int13ext_s {
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u8 size;
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u8 reserved;
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u16 count;
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u16 offset;
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u16 segment;
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u64 lba;
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} PACKED;
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#define GET_INT13EXT(regs,var) \
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GET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var)
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#define SET_INT13EXT(regs,var,val) \
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SET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var, (val))
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// Disk Physical Table definition
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struct int13dpt_s {
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u16 size;
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u16 infos;
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u32 cylinders;
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u32 heads;
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u32 spt;
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u64 sector_count;
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u16 blksize;
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u16 dpte_offset;
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u16 dpte_segment;
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u16 key;
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u8 dpi_length;
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u8 reserved1;
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u16 reserved2;
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u8 host_bus[4];
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u8 iface_type[8];
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u64 iface_path;
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u64 device_path;
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u8 reserved3;
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u8 checksum;
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} PACKED;
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#define GET_INT13DPT(regs,var) \
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GET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var)
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#define SET_INT13DPT(regs,var,val) \
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SET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var, (val))
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// Floppy "Disk Base Table"
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struct floppy_dbt_s {
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u8 specify1;
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u8 specify2;
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u8 shutoff_ticks;
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u8 bps_code;
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u8 sectors;
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u8 interblock_len;
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u8 data_len;
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u8 gap_len;
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u8 fill_byte;
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u8 settle_time;
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u8 startup_time;
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} PACKED;
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struct floppy_ext_dbt_s {
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struct floppy_dbt_s dbt;
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// Extra fields
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u8 max_track;
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u8 data_rate;
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u8 drive_type;
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} PACKED;
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// Helper function for setting up a return code.
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struct bregs;
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void __disk_ret(struct bregs *regs, u32 linecode, const char *fname);
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#define disk_ret(regs, code) \
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__disk_ret((regs), (code) | (__LINE__ << 8), __func__)
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/****************************************************************
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* Disk command request
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****************************************************************/
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struct disk_op_s {
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u64 lba;
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void *far_buffer;
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u16 count;
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u8 driveid;
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u8 command;
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};
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#define CMD_CDROM_READ 1
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#define CMD_CDEMU_READ 2
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/****************************************************************
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* Global storage
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****************************************************************/
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struct chs_s {
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u16 heads; // # heads
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u16 cylinders; // # cylinders
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u16 spt; // # sectors / track
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};
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struct ata_channel_s {
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u16 iobase1; // IO Base 1
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u16 iobase2; // IO Base 2
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u16 pci_bdf;
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u8 irq; // IRQ
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};
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struct ata_device_s {
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u8 type; // Detected type of ata (ata/atapi/none/unknown)
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u8 device; // Detected type of attached devices (hd/cd/none)
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u8 removable; // Removable device flag
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u8 mode; // transfer mode : PIO 16/32 bits - IRQ - ISADMA - PCIDMA
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u16 blksize; // block size
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u8 translation; // type of translation
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struct chs_s lchs; // Logical CHS
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struct chs_s pchs; // Physical CHS
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u64 sectors; // Total sectors count
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};
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struct ata_s {
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// ATA channels info
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struct ata_channel_s channels[CONFIG_MAX_ATA_INTERFACES];
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// ATA devices info
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struct ata_device_s devices[CONFIG_MAX_ATA_DEVICES];
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//
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// map between bios hd/cd id and ata channels
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u8 cdcount;
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u8 idmap[2][CONFIG_MAX_ATA_DEVICES];
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};
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/****************************************************************
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* Function defs
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****************************************************************/
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// ata.c
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extern struct ata_s ATA;
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int ata_cmd_data(struct disk_op_s *op);
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int cdrom_read(struct disk_op_s *op);
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int cdrom_read_512(struct disk_op_s *op);
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int ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen
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, u32 length, void *far_buffer);
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void ata_reset(int driveid);
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void hard_drive_setup();
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// floppy.c
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extern struct floppy_ext_dbt_s diskette_param_table2;
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void floppy_drive_setup();
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void floppy_13(struct bregs *regs, u8 drive);
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void floppy_tick();
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// disk.c
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void disk_13(struct bregs *regs, u8 device);
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void disk_13XX(struct bregs *regs, u8 device);
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// cdrom.c
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void cdrom_13(struct bregs *regs, u8 device);
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void cdemu_13(struct bregs *regs);
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void cdemu_134b(struct bregs *regs);
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int cdrom_boot();
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#endif // disk.h
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