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ARC disk write support.

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* grub-core/disk/arc/arcdisk.c (handle_writable): New var.
	(reopen): New argument writable. All users updated.
	Handle required access mode.
	(grub_arcdisk_write): Implement.
	* include/grub/arc/arc.h (grub_arc_file_access): New enum.
	(grub_arc_firmware_vector): Make buffer to write a const buffer.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-01-25 16:13:34 +01:00
parent e06c2e7abc
commit fc36d6038b
3 changed files with 59 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

50
grub-core/disk/arc/arcdisk.c
View file

@ -24,6 +24,7 @@
static grub_arc_fileno_t last_handle = 0;
static char *last_path = NULL;
static int handle_writable = 0;
static int lnum = 0;
@ -100,11 +101,12 @@ grub_arcdisk_iterate (int (*hook_in) (const char *name),
#define RAW_SUFFIX "partition(10)"
static grub_err_t
reopen (const char *name)
reopen (const char *name, int writable)
{
grub_arc_fileno_t handle;
if (last_path && grub_strcmp (last_path, name) == 0)
if (last_path && grub_strcmp (last_path, name) == 0
&& (!writable || handle_writable))
{
grub_dprintf ("arcdisk", "using already opened %s\n", name);
return GRUB_ERR_NONE;
@ -115,12 +117,16 @@ reopen (const char *name)
grub_free (last_path);
last_path = NULL;
last_handle = 0;
handle_writable = 0;
}
if (GRUB_ARC_FIRMWARE_VECTOR->open (name, 0, &handle))
if (GRUB_ARC_FIRMWARE_VECTOR->open (name,
writable ? GRUB_ARC_FILE_ACCESS_OPEN_RW
: GRUB_ARC_FILE_ACCESS_OPEN_RO, &handle))
{
grub_dprintf ("arcdisk", "couldn't open %s\n", name);
return grub_error (GRUB_ERR_IO, "couldn't open %s", name);
}
handle_writable = writable;
last_path = grub_strdup (name);
if (!last_path)
return grub_errno;
@ -180,7 +186,7 @@ grub_arcdisk_open (const char *name, grub_disk_t disk)
if (!hash)
return grub_errno;
err = reopen (fullname);
err = reopen (fullname, 0);
if (err)
return err;
@ -234,7 +240,7 @@ grub_arcdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_uint64_t totl = size << 9;
grub_arc_err_t r;
err = reopen (disk->data);
err = reopen (disk->data, 0);
if (err)
return err;
r = GRUB_ARC_FIRMWARE_VECTOR->seek (last_handle, &pos, 0);
@ -258,12 +264,36 @@ grub_arcdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
}
static grub_err_t
grub_arcdisk_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_arcdisk_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_uint64_t pos = sector << 9;
unsigned long count;
grub_uint64_t totl = size << 9;
grub_arc_err_t r;
err = reopen (disk->data, 1);
if (err)
return err;
r = GRUB_ARC_FIRMWARE_VECTOR->seek (last_handle, &pos, 0);
if (r)
{
grub_dprintf ("arcdisk", "seek to 0x%" PRIxGRUB_UINT64_T " failed: %ld\n",
pos, r);
return grub_error (GRUB_ERR_IO, "couldn't seek");
}
while (totl)
{
if (GRUB_ARC_FIRMWARE_VECTOR->write (last_handle, buf,
totl, &count))
return grub_error (GRUB_ERR_WRITE_ERROR, "write failed");
totl -= count;
buf += count;
}
return GRUB_ERR_NONE;
}
static struct grub_disk_dev grub_arcdisk_dev =