static grub_err_t
grub_ofdisk_prepare (grub_disk_t disk, grub_disk_addr_t sector)
{
grub_ssize_t status;
unsigned long long pos;
if (disk->data != last_devpath)
{
if (last_ihandle)
grub_ieee1275_close (last_ihandle);
last_ihandle = 0;
last_devpath = NULL;
grub_ieee1275_open (disk->data, &last_ihandle);
if (! last_ihandle)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "can't open device");
last_devpath = disk->data;
}
pos = sector << disk->log_sector_size;
grub_ieee1275_seek (last_ihandle, pos, &status);
if (status < 0)
return grub_error (GRUB_ERR_READ_ERROR,
"seek error, can't seek block %llu",
(long long) sector);
return 0;
}
static grub_err_t
grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
{
grub_ssize_t status, actual;
unsigned long long pos;
if (disk->data != last_devpath)
{
if (last_ihandle)
grub_ieee1275_close (last_ihandle);
last_ihandle = 0;
last_devpath = NULL;
if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PARTITION_0))
{
char name2[grub_strlen (disk->data) + 3];
char *p;
grub_strcpy (name2, disk->data);
p = name2 + grub_strlen (name2);
*p++ = ':';
*p++ = '0';
*p = 0;
grub_ieee1275_open (name2, &last_ihandle);
}
else
grub_ieee1275_open (disk->data, &last_ihandle);
if (! last_ihandle)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "can't open device");
last_devpath = disk->data;
}
pos = sector * 512UL;
grub_ieee1275_seek (last_ihandle, pos, &status);
if (status < 0)
return grub_error (GRUB_ERR_READ_ERROR,
"seek error, can't seek block %llu",
(long long) sector);
grub_ieee1275_read (last_ihandle, buf, size * 512UL, &actual);
if (actual != (grub_ssize_t) (size * 512UL))
return grub_error (GRUB_ERR_READ_ERROR, "read error on block: %llu",
(long long) sector);
return 0;
}
static grub_err_t
grub_ofdisk_prepare (grub_disk_t disk, grub_disk_addr_t sector)
{
grub_ssize_t status;
unsigned long long pos;
if (disk->data != last_devpath)
{
if (last_ihandle)
grub_ieee1275_close (last_ihandle);
last_ihandle = 0;
last_devpath = NULL;
if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PARTITION_0))
{
char name2[grub_strlen (disk->data) + 3];
char *p;
grub_strcpy (name2, disk->data);
p = name2 + grub_strlen (name2);
*p++ = ':';
*p++ = '0';
*p = 0;
grub_ieee1275_open (name2, &last_ihandle);
}
else
grub_ieee1275_open (disk->data, &last_ihandle);
if (! last_ihandle)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "can't open device");
last_devpath = disk->data;
}
pos = sector << GRUB_DISK_SECTOR_BITS;
grub_ieee1275_seek (last_ihandle, pos, &status);
if (status < 0)
return grub_error (GRUB_ERR_READ_ERROR,
"seek error, can't seek block %llu",
(long long) sector);
return 0;
}
static grub_err_t
grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
{
grub_ssize_t status, actual;
unsigned long long pos;
struct ofdisk_hash_ent *data = disk->data;
pos = sector * 512UL;
grub_ieee1275_seek (data->dev_ihandle, pos, &status);
if (status < 0)
return grub_error (GRUB_ERR_READ_ERROR,
"seek error, can't seek block %llu",
(long long) sector);
size <<= 9;
grub_ieee1275_read (data->dev_ihandle, buf, size, &actual);
if (actual != (int) size)
return grub_error (GRUB_ERR_READ_ERROR, "read error on block: %llu",
(long long) sector);
return 0;
}