1 // Definitions for X86 bios disks.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
9 #include "types.h" // u8
10 #include "config.h" // CONFIG_*
11 #include "farptr.h" // struct segoff_s
13 #define DISK_RET_SUCCESS 0x00
14 #define DISK_RET_EPARAM 0x01
15 #define DISK_RET_EADDRNOTFOUND 0x02
16 #define DISK_RET_EWRITEPROTECT 0x03
17 #define DISK_RET_ECHANGED 0x06
18 #define DISK_RET_EBOUNDARY 0x09
19 #define DISK_RET_EBADTRACK 0x0c
20 #define DISK_RET_ECONTROLLER 0x20
21 #define DISK_RET_ETIMEOUT 0x80
22 #define DISK_RET_ENOTLOCKED 0xb0
23 #define DISK_RET_ELOCKED 0xb1
24 #define DISK_RET_ENOTREMOVABLE 0xb2
25 #define DISK_RET_ETOOMANYLOCKS 0xb4
26 #define DISK_RET_EMEDIA 0xC0
27 #define DISK_RET_ENOTREADY 0xAA
30 /****************************************************************
32 ****************************************************************/
34 // Bios disk structures.
43 #define GET_INT13EXT(regs,var) \
44 GET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var)
45 #define SET_INT13EXT(regs,var,val) \
46 SET_FARVAR((regs)->ds, ((struct int13ext_s*)((regs)->si+0))->var, (val))
48 // Disk Physical Table definition
71 #define GET_INT13DPT(regs,var) \
72 GET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var)
73 #define SET_INT13DPT(regs,var,val) \
74 SET_FARVAR((regs)->ds, ((struct int13dpt_s*)((regs)->si+0))->var, (val))
76 // Floppy "Disk Base Table"
91 struct floppy_ext_dbt_s {
92 struct floppy_dbt_s dbt;
99 // Helper function for setting up a return code.
101 void __disk_ret(struct bregs *regs, u32 linecode, const char *fname);
102 #define disk_ret(regs, code) \
103 __disk_ret((regs), (code) | (__LINE__ << 8), __func__)
104 void __disk_ret_unimplemented(struct bregs *regs, u32 linecode
105 , const char *fname);
106 #define disk_ret_unimplemented(regs, code) \
107 __disk_ret_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
110 /****************************************************************
112 ****************************************************************/
114 struct packed_chs_s {
122 struct packed_chs_s first;
124 struct packed_chs_s last;
136 struct partition_s partitions[4];
141 #define MBR_SIGNATURE 0xaa55
144 /****************************************************************
145 * Disk command request
146 ****************************************************************/
151 struct drive_s *drive_g;
156 #define CMD_RESET 0x00
157 #define CMD_READ 0x02
158 #define CMD_WRITE 0x03
159 #define CMD_VERIFY 0x04
160 #define CMD_FORMAT 0x05
161 #define CMD_SEEK 0x07
162 #define CMD_ISREADY 0x10
165 /****************************************************************
167 ****************************************************************/
170 u16 heads; // # heads
171 u16 cylinders; // # cylinders
172 u16 spt; // # sectors / track
176 u8 type; // Driver type (DTYPE_*)
177 u8 floppy_type; // Type of floppy (only for floppy drives).
178 struct chs_s lchs; // Logical CHS
179 u64 sectors; // Total sectors count
180 char *desc; // Drive description (only available during POST)
181 u32 cntl_id; // Unique id for a given driver type.
182 u8 removable; // Is media removable (currently unused)
184 // Info for EDD calls
185 u8 translation; // type of translation
186 u16 blksize; // block size
187 struct chs_s pchs; // Physical CHS
190 #define DISK_SECTOR_SIZE 512
191 #define CDROM_SECTOR_SIZE 2048
193 #define DTYPE_NONE 0x00
194 #define DTYPE_FLOPPY 0x01
195 #define DTYPE_ATA 0x02
196 #define DTYPE_ATAPI 0x03
197 #define DTYPE_RAMDISK 0x04
198 #define DTYPE_CDEMU 0x05
199 #define DTYPE_USB 0x06
200 #define DTYPE_VIRTIO 0x07
201 #define DTYPE_AHCI 0x08
203 #define MAXDESCSIZE 80
205 #define TRANSLATION_NONE 0
206 #define TRANSLATION_LBA 1
207 #define TRANSLATION_LARGE 2
208 #define TRANSLATION_RECHS 3
210 #define EXTTYPE_FLOPPY 0
214 #define EXTSTART_HD 0x80
215 #define EXTSTART_CD 0xE0
218 /****************************************************************
220 ****************************************************************/
223 extern u8 FloppyCount, CDCount;
224 struct drive_s *getDrive(u8 exttype, u8 extdriveoffset);
225 int getDriveId(u8 exttype, struct drive_s *drive_g);
226 void map_floppy_drive(struct drive_s *drive_g);
227 void map_hd_drive(struct drive_s *drive_g);
228 void map_cd_drive(struct drive_s *drive_g);
229 int process_op(struct disk_op_s *op);
230 int send_disk_op(struct disk_op_s *op);
233 extern struct floppy_ext_dbt_s diskette_param_table2;
234 void floppy_setup(void);
235 struct drive_s *addFloppy(int floppyid, int ftype, int driver);
236 int find_floppy_type(u32 size);
237 int process_floppy_op(struct disk_op_s *op);
238 void floppy_tick(void);
241 extern struct drive_s *cdemu_drive_gf;
242 int process_cdemu_op(struct disk_op_s *op);
243 void cdemu_setup(void);
244 void cdemu_134b(struct bregs *regs);
245 int cdrom_boot(struct drive_s *drive_g);
248 void ramdisk_setup(void);
249 int process_ramdisk_op(struct disk_op_s *op);