u-boot.git/disk/part.c, branch v2013.04

disk: define HAVE_BLOCK_DEVICE in a common place

2013-03-14T18:06:44+00:00

This set of ifdefs is used in a number of places. Move its definition
somewhere common so it doesn't have to be repeated.

Signed-off-by: Stephen Warren 
Acked-by: Simon Glass 
Acked-by: Tom Rini 
Signed-off-by: Tom Warren

sandbox: Add host filesystem

2013-03-04T19:19:56+00:00

This allows reading of files from the host filesystem in sandbox.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini

part: check each variable for capability calculation

2012-12-06T20:56:39+00:00

In order to calculate the capability, we use the below expression to check:
((dev_desc->lba * dev_desc->blksz)>0L)
If the capability is greater than 4GB (e.g. 8GB = 8 * 1024 * 104 * 1024),
the result will overflow, the low 32bit may be zero.

Therefore, change to check each variable to fix this potential issue.

Signed-off-by: Jerry Huang

disk: Make the disk partition code work with no specific partition types

2012-10-22T15:29:55+00:00

Currently, if the disk partition code is compiled with all of the parition
types compiled out, it hits an #error which stops the build. This change
adjusts that file so that those functions will fall through to their defaults
in those cases instead of breaking the build. These functions are needed
because other code calls them, and that code is needed because other config
options are overly broad and bring in support we don't need along with
support we do.

Also reduce repetition of the 6-term #ifdef throughout the file.

Signed-off-by: Gabe Black 
Signed-off-by: Simon Glass

disk: initialize name/part fields when returning a whole disk

2012-10-19T20:42:33+00:00

When get_device_and_partition() finds a disk without a partition table,
under some conditions, it "returns" a disk_partition_t that describes
the entire raw disk. Make sure to initialize all fields in the partition
descriptor in that case.

The value chosen for name is just some arbitrary descriptive string.

The value chosen for info matches the check at the end of
get_device_and_partition(). However, it's probably not that important;
it's not obvious that the value is really used.

Reported-by: Benoît Thébaudeau 
Signed-off-by: Stephen Warren 
Reviewed-by: Benoît Thébaudeau 
Signed-off-by: Tom Rini

disk: get_device_and_partition() return value fixes

2012-10-17T14:59:09+00:00

When no valid partitions are found, guarantee that we return -1. This
most likely already happens, since the most recent get_partition_info()
will have returned an error. However, it's best to be explicit.

Remove an unnecessary assignment of ret=0 in the success case; this value
is over-written with the processed partition ID later.

Signed-off-by: Stephen Warren

disk: allow - or empty string to fall back to $bootdevice

2012-09-28T16:15:35+00:00

Commit 10a37fd "disk: get_device_and_partition() "auto" partition"
prevented the use of "-" on the command-line to request fallback to the
$bootdevice environment variable instead. This patch allows that, or an
empty string "" to be used.

Tested:
setenv bootfile /boot/zImage
setenv bootdevice 0:1
ext2load mmc 0:1
ext2load mmc -
ext2load mmc ""

Signed-off-by: Stephen Warren

disk: part_efi: parse and store partition UUID

2012-09-25T22:05:44+00:00

Each EFI partition table entry contains a UUID. Extend U-Boot's struct
disk_partition to be able to store this information, and modify
get_partition_info_efi() to fill it in.

The implementation of uuid_string() was derived from the Linux kernel,
tag v3.6-rc4 file lib/vsprintf.c function uuid_string().

Signed-off-by: Stephen Warren

disk: get_device_and_partition() "auto" partition and cleanup

2012-09-25T21:58:48+00:00

Rework get_device_and_partition() to:
a) Implement a new partition ID of "auto", which requests that U-Boot
   search for the first "bootable" partition, and fall back to the first
   valid partition if none is found. This way, users don't need to
   specify an explicit partition in their commands.
b) Make use of get_device().
c) Add parameter to indicate whether returning a whole device is
   acceptable, or whether a partition is mandatory.
d) Make error-checking of the user's device-/partition-specification
   more complete. In particular, if strtoul() doesn't convert all
   characters, it's an error rather than just ignored.

The resultant device/partition returned by the function will be as
follows, based on whether the disk has a partition table (ptable) or not,
and whether the calling command allows the whole device to be returned
or not.

(D and P are integers, P >= 1)

D
D:
  No ptable:
    !allow_whole_dev: error
    allow_whole_dev: device D
  ptable:
    device D partition 1
D:0
  !allow_whole_dev: error
  allow_whole_dev: device D
D:P
  No ptable: error
  ptable: device D partition P
D:auto
  No ptable:
    !allow_whole_dev: error
    allow_whole_dev: device D
  ptable:
    first partition in device D with bootable flag set.
    If none, first valid paratition in device D.

Note: In order to review this patch, it's probably easiest to simply
look at the file contents post-application, rather than reading the
patch itself.

Signed-off-by: Rob Herring 
[swarren: Rob implemented scanning for bootable partitions. I fixed a
couple of issues there, switched the syntax to ":auto", added the
error-checking rework, and ":0" syntax for the whole device]
Signed-off-by: Stephen Warren

disk: introduce get_device()

2012-09-25T21:49:33+00:00

This patch introduces function get_device(). This looks up a
block_dev_desc_t from an interface name (e.g. mmc) and device number
(e.g. 0). This function is essentially the non-partition-specific
prefix of get_device_and_partition().

Signed-off-by: Stephen Warren