diff options
Diffstat (limited to 'src/block.h')
| -rw-r--r-- | src/block.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/block.h b/src/block.h new file mode 100644 index 0000000..3492806 --- /dev/null +++ b/src/block.h @@ -0,0 +1,129 @@ +#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 |