source: ps2launchargs/source/uLaunchELF/hdl_info/hdd.h

#ifndef _CDVDHDD_H_
#define _CDVDHDD_H_

#define HDL_IRX 0xD0D0D0D

#define HDD_SECTOR_SIZE 512    /* HDD sector size in bytes */

/* HD Loader I/O interface */

typedef struct hio_type hio_t;

typedef int (*hio_probe_t) (const char *path,
                            hio_t **hio);

typedef int (*hio_stat_t) (hio_t *hio,
                           u_long *size_in_kb);

typedef int (*hio_read_t) (hio_t *hio,
                           u_long start_sector,
                           u_long num_sectors,
                           void *output,
                           u_long *bytes);

typedef int (*hio_write_t) (hio_t *hio,
                            u_long start_sector,
                            u_long num_sectors,
                            const void *input,
                            u_long *bytes);

typedef int (*hio_flush_t) (hio_t *hio);

typedef int (*hio_poweroff_t) (hio_t *hio);

typedef int (*hio_close_t) (hio_t *hio);

/* return last error text in a memory buffer, that would be freed by calling hio_dispose_error_t */
typedef char* (*hio_last_error_t) (hio_t *hio);
typedef void (*hio_dispose_error_t) (hio_t *hio,
                                     char* error);

struct hio_type
{
  hio_stat_t stat;
  hio_read_t read;
  hio_write_t write;
  hio_flush_t flush;
  hio_close_t close;
  hio_poweroff_t poweroff;
  hio_last_error_t last_error;
  hio_dispose_error_t dispose_error;
};

typedef struct hio_iop_type
{
  hio_t hio;
  int unit;
  size_t size_in_sectors;
} hio_iop_t;

typedef struct {
  char Partition_Name [32 + 1];
} Rpc_Packet_Send_GetInfo;

typedef struct {
        char OldName[64];
        char NewName[64];
} Rpc_Packet_Send_Rename;

typedef struct {
  char Partition_Name [32 + 1];
  char Name [64 + 1];
  char Startup [8 + 1 + 3 + 1];
  int  Is_Dvd;
} GameInfo;

int HdlGetGameInfo(char *PartName, GameInfo *GameInf);
int HdlRenameGame(void *Data);

#endif