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IEEE1275 disk write support.

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* grub-core/kern/ieee1275/ieee1275.c (grub_ieee1275_write): Make buffer
	const void *.
	* include/grub/ieee1275/ieee1275.h (grub_ieee1275_write): Likewise.
	* grub-core/disk/ieee1275/ofdisk.c (grub_ofdisk_read): Move open
	and seek loginc to ...
	(grub_ofdisk_prepare): ... here.
	(grub_ofdisk_write): Implement.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-01-25 18:32:08 +01:00
parent fc36d6038b
commit 7626111087
4 changed files with 46 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

43
grub-core/disk/ieee1275/ofdisk.c
View file

@ -311,10 +311,9 @@ grub_ofdisk_close (grub_disk_t disk)
}
static grub_err_t
grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
grub_ofdisk_prepare (grub_disk_t disk, grub_disk_addr_t sector)
{
grub_ssize_t status, actual;
grub_ssize_t status;
unsigned long long pos;
if (disk->data != last_devpath)
@ -343,15 +342,28 @@ grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
last_devpath = disk->data;
}
pos = sector * 512UL;
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);
grub_ieee1275_read (last_ihandle, buf, size * 512UL, &actual);
if (actual != (grub_ssize_t) (size * 512UL))
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_err_t err;
grub_ssize_t actual;
err = grub_ofdisk_prepare (disk, sector);
if (err)
return err;
grub_ieee1275_read (last_ihandle, buf, size << GRUB_DISK_SECTOR_BITS,
&actual);
if (actual != (grub_ssize_t) (size << GRUB_DISK_SECTOR_BITS))
return grub_error (GRUB_ERR_READ_ERROR, "read error on block: %llu",
(long long) sector);
@ -359,12 +371,21 @@ grub_ofdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
}
static grub_err_t
grub_ofdisk_write (grub_disk_t disk __attribute ((unused)),
grub_disk_addr_t sector __attribute ((unused)),
grub_size_t size __attribute ((unused)),
const char *buf __attribute ((unused)))
grub_ofdisk_write (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, const char *buf)
{
return GRUB_ERR_NOT_IMPLEMENTED_YET;
grub_err_t err;
grub_ssize_t actual;
err = grub_ofdisk_prepare (disk, sector);
if (err)
return err;
grub_ieee1275_write (last_ihandle, buf, size << GRUB_DISK_SECTOR_BITS,
&actual);
if (actual != (grub_ssize_t) (size << GRUB_DISK_SECTOR_BITS))
return grub_error (GRUB_ERR_WRITE_ERROR, "write error on block: %llu",
(long long) sector);
return 0;
}
static struct grub_disk_dev grub_ofdisk_dev =