/* biosdisk.h - emulate biosdisk */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2002,2007  Free Software Foundation, Inc.
 *
 *  GRUB is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef GRUB_BIOSDISK_MACHINE_UTIL_HEADER
#define GRUB_BIOSDISK_MACHINE_UTIL_HEADER	1

#include <grub/disk.h>
#include <grub/partition.h>
#include <sys/types.h>

#if defined (__AROS__)
struct grub_util_fd
{
  enum { GRUB_UTIL_FD_FILE, GRUB_UTIL_FD_DISK } type;
  grub_uint64_t off;
  union
  {
    int fd;
    struct {
      struct IOExtTD *ioreq;
      struct MsgPort *mp;
      unsigned int is_floppy:1;
      unsigned int is_64:1;
    };
  };
};
typedef struct grub_util_fd *grub_util_fd_t;

#define GRUB_UTIL_FD_INVALID NULL
#define GRUB_UTIL_FD_IS_VALID(x) ((x) != GRUB_UTIL_FD_INVALID)
#define GRUB_UTIL_FD_STAT_IS_FUNCTIONAL 0

#elif defined (__CYGWIN__) || defined (__MINGW32__)
#include <windows.h>
typedef HANDLE grub_util_fd_t;
#define GRUB_UTIL_FD_INVALID INVALID_HANDLE_VALUE
#define GRUB_UTIL_FD_IS_VALID(x) ((x) != GRUB_UTIL_FD_INVALID)
#define GRUB_UTIL_FD_STAT_IS_FUNCTIONAL 0
#else
typedef int grub_util_fd_t;
#define GRUB_UTIL_FD_INVALID -1
#define GRUB_UTIL_FD_IS_VALID(x) ((x) >= 0)
#define GRUB_UTIL_FD_STAT_IS_FUNCTIONAL 1
#endif

grub_util_fd_t
grub_util_fd_open (const char *os_dev, int flags);
const char *
grub_util_fd_strerror (void);
void
grub_util_fd_sync (grub_util_fd_t fd);
void
grub_util_fd_close (grub_util_fd_t fd);

grub_util_fd_t
grub_util_fd_open_device (const grub_disk_t disk, grub_disk_addr_t sector, int flags,
			  grub_disk_addr_t *max);

void grub_util_biosdisk_init (const char *dev_map);
void grub_util_biosdisk_fini (void);
char *grub_util_biosdisk_get_grub_dev (const char *os_dev);
const char *grub_util_biosdisk_get_osdev (grub_disk_t disk);
int grub_util_biosdisk_is_present (const char *name);
int grub_util_biosdisk_is_floppy (grub_disk_t disk);
const char *
grub_util_biosdisk_get_compatibility_hint (grub_disk_t disk);
grub_err_t grub_util_biosdisk_flush (struct grub_disk *disk);
grub_err_t
grub_util_fd_seek (grub_util_fd_t fd, const char *name, grub_uint64_t sector);
ssize_t grub_util_fd_read (grub_util_fd_t fd, char *buf, size_t len);
ssize_t grub_util_fd_write (grub_util_fd_t fd, const char *buf, size_t len);
grub_err_t
grub_cryptodisk_cheat_mount (const char *sourcedev, const char *cheat);
const char *
grub_util_cryptodisk_get_uuid (grub_disk_t disk);
char *
grub_util_get_ldm (grub_disk_t disk, grub_disk_addr_t start);
int
grub_util_is_ldm (grub_disk_t disk);
#ifdef GRUB_UTIL
grub_err_t
grub_util_ldm_embed (struct grub_disk *disk, unsigned int *nsectors,
		     unsigned int max_nsectors,
		     grub_embed_type_t embed_type,
		     grub_disk_addr_t **sectors);
#endif
const char *
grub_hostdisk_os_dev_to_grub_drive (const char *os_dev, int add);

grub_uint64_t
grub_util_get_fd_size (grub_util_fd_t fd, const char *name, unsigned *log_secsize);

char *
grub_util_get_os_disk (const char *os_dev);

#ifdef __linux__
int
grub_hostdisk_linux_find_partition (char *dev, grub_disk_addr_t sector);
#endif

int
grub_util_get_dm_node_linear_info (const char *dev,
				   int *maj, int *min,
				   grub_disk_addr_t *st);


/* Supplied by hostdisk_*.c.  */
grub_int64_t
grub_util_get_fd_size_os (grub_util_fd_t fd, const char *name, unsigned *log_secsize);
/* REturns partition offset in 512B blocks.  */
grub_disk_addr_t
grub_hostdisk_find_partition_start_os (const char *dev);
void
grub_hostdisk_flush_initial_buffer (const char *os_dev);

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__) || defined (__sun__) || defined(__OpenBSD__)
#define GRUB_DISK_DEVS_ARE_CHAR 1
#else
#define GRUB_DISK_DEVS_ARE_CHAR 0
#endif

struct grub_util_hostdisk_data
{
  char *dev;
  int access_mode;
  grub_util_fd_t fd;
  int is_disk;
  int device_map;
};

#endif /* ! GRUB_BIOSDISK_MACHINE_UTIL_HEADER */