blob: 34928061efd3a80815752e26398e360308db4bf0 [file] [log] [blame]
#ifndef __BLOCK_H
#define __BLOCK_H
#include "types.h" // u32
/****************************************************************
* 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
u16 pad;
};
// ElTorito Device Emulation data
struct cdemu_s {
struct drive_s *emulated_drive_gf;
u32 ilba;
u16 buffer_segment;
u16 load_segment;
u16 sector_count;
u8 active;
u8 media;
u8 emulated_extdrive;
// Virtual device
struct chs_s lchs;
};
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_ATA_ATAPI 0x03
#define DTYPE_RAMDISK 0x04
#define DTYPE_CDEMU 0x05
#define DTYPE_AHCI 0x06
#define DTYPE_AHCI_ATAPI 0x07
#define DTYPE_VIRTIO_SCSI 0x08
#define DTYPE_VIRTIO_BLK 0x09
#define DTYPE_USB 0x0a
#define DTYPE_UAS 0x0b
#define DTYPE_LSI_SCSI 0x0c
#define DTYPE_ESP_SCSI 0x0d
#define DTYPE_MEGASAS 0x0e
#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 struct dpte_s DefaultDPTE;
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);
struct bregs;
void __disk_ret(struct bregs *regs, u32 linecode, const char *fname);
void __disk_ret_unimplemented(struct bregs *regs, u32 linecode
, const char *fname);
int process_op(struct disk_op_s *op);
int send_disk_op(struct disk_op_s *op);
int create_bounce_buf(void);
// Helper function for setting up a return code.
#define disk_ret(regs, code) \
__disk_ret((regs), (code) | (__LINE__ << 8), __func__)
#define disk_ret_unimplemented(regs, code) \
__disk_ret_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
#endif // block.h