static grub_err_t
grub_biosdisk_open (const char *name, grub_disk_t disk)
{
int drive;
struct grub_biosdisk_data *data;
drive = (! grub_strcmp (name, "boot")) ? grub_boot_drive :
grub_biosdisk_get_drive (name);
if (drive < 0)
return grub_errno;
data = get_drive_geom (drive);
if (! data)
return grub_error (GRUB_ERR_BAD_DEVICE, "invalid drive");
disk->has_partitions = (drive != cd_drive);
disk->id = drive;
disk->total_sectors = data->total_sectors;
disk->data = data;
return GRUB_ERR_NONE;
}
static grub_err_t
grub_biosdisk_open (const char *name, grub_disk_t disk)
{
grub_uint64_t total_sectors = 0;
int drive;
struct grub_biosdisk_data *data;
drive = grub_biosdisk_get_drive (name);
if (drive < 0)
return grub_errno;
disk->has_partitions = ((drive & 0x80) && (drive != cd_drive));
disk->id = drive;
data = (struct grub_biosdisk_data *) grub_zalloc (sizeof (*data));
if (! data)
return grub_errno;
data->drive = drive;
if ((cd_drive) && (drive == cd_drive))
{
data->flags = GRUB_BIOSDISK_FLAG_LBA | GRUB_BIOSDISK_FLAG_CDROM;
data->sectors = 32;
total_sectors = GRUB_ULONG_MAX; /* TODO: get the correct size. */
}
else if (drive & 0x80)
{
/* HDD */
int version;
version = grub_biosdisk_check_int13_extensions (drive);
if (version)
{
struct grub_biosdisk_drp *drp
= (struct grub_biosdisk_drp *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
/* Clear out the DRP. */
grub_memset (drp, 0, sizeof (*drp));
drp->size = sizeof (*drp);
if (! grub_biosdisk_get_diskinfo_int13_extensions (drive, drp))
{
data->flags = GRUB_BIOSDISK_FLAG_LBA;
if (drp->total_sectors)
total_sectors = drp->total_sectors;
else
/* Some buggy BIOSes doesn't return the total sectors
correctly but returns zero. So if it is zero, compute
it by C/H/S returned by the LBA BIOS call. */
total_sectors = drp->cylinders * drp->heads * drp->sectors;
}
}
}
if (! (data->flags & GRUB_BIOSDISK_FLAG_CDROM))
{
if (grub_biosdisk_get_diskinfo_standard (drive,
&data->cylinders,
&data->heads,
&data->sectors) != 0)
{
if (total_sectors && (data->flags & GRUB_BIOSDISK_FLAG_LBA))
{
data->sectors = 63;
data->heads = 255;
data->cylinders
= grub_divmod64 (total_sectors
+ data->heads * data->sectors - 1,
data->heads * data->sectors, 0);
}
else
{
grub_free (data);
return grub_error (GRUB_ERR_BAD_DEVICE, "%s cannot get C/H/S values", disk->name);
}
}
if (! total_sectors)
total_sectors = data->cylinders * data->heads * data->sectors;
}
disk->total_sectors = total_sectors;
disk->data = data;
return GRUB_ERR_NONE;
}
