Fix bug in export 64 bit unsigned environment variable. ...

This patch corrects exporting unsigned 64-bit environment variables.
I had left out a signed off line before.

Signed-off-by: Michael Burkey <mdburkey at gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

don't cast negative error codes to unsigned size_t ...

The cast prevents us from doing proper error checking.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: fix signedness mixups in printf format specifiers ...

This most likely doesn't fix any real bugs, but it's the
right thing to do and reduces the noise level with static
checkers.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

loadenv: detect truncated environment files ...

Properly detect when an environment file is truncated. This can happen
when a previous saveenv failed because the environment partition is too
small.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

saveenv: Properly detect write errors ...

The return value check of the write call is completely bogus. We
check if we have written at minimum sizeof(struct envfs_super) bytes
instead of all bytes. Properly check for all bytes written instead
and allow write to write less bytes than requested.
Do not use write_full because this file is compiled for userspace
aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/ppc'

Merge branch 'for-next/menutree'

Merge branch 'for-next/boot'

environment: Fix unitiliazed variable ...

envfs_load_data needs a pointer to the envfs_super, otherwise it
works on an unitialized struct when detecting the envfs version.

This is broken since:

| commit 0a2a8f7
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Thu Feb 20 08:16:01 2014 +0100
|
|     environment: Add function to load envfs from buffer
|
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Grmpf. Most compilers do not issue a warning, only the blackfin
gcc 4.3.5 warns about this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defenv-2: replace menu with menutree ...

This makes the menu easier to extend and to maintain.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

add menutree command ...

Creating menus from the shell using the regular 'menu' command is rather
complicated. This adds a 'menutree' command which creates a menu from
a directory structure. In the directory structure each directory corresponds
to a single menu entry. The directory contains the following files:

title -  A file containing the title of the entry as shown in the menu
box -    If present, the entry is a 'bool' entry. The file contains a variable
         name from which the current state of the bool is taken from and saved
         to.
action - if present this file contains a shell script which is executed when
         when the entry is selected.

If neither 'box' or 'action' are present this entry is considered a submenu
containing more entries.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add shell_expand function ...

shell_expand expands shell variables in a string.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: Fix menu files selection ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

blspec: Check if an entry is compatible with the current machine ...

When a bootspec entry has the 'devicetree' property specified, check
if the tree is compatible with the currently running machine, otherwise
ignore the entry. This makes it possible to have entries for multiple
machines on an SD card and pick a suitable one.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: DDR3 SPD verification support ...

Add DDR3 SPD verification support for use by the PPC 8xxx DDR driver.

This is based on the equivalent files from U-Boot version git-be937b5.

Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/nfs' ...

Conflicts:
	defaultenv/defaultenv-2-base/bin/ifup

Merge branch 'for-next/misc' ...

Conflicts:
	common/environment.c

Merge branch 'for-next/gpio-keys'

blspec: Add NFS support ...

With this barebox can start root filesystems containing bootloader
spec entries via NFS. It is used as:

boot nfs://<ipaddr>[:<port]//path/to/nfsroot

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: Add ifup support ...

The defaultenv-2 has ifup support as a shell script. This patch
replaces it with a command which is more robust, can be called
from C and now can also bring up all configured interfaces.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

run_command: remove unused flag parameter ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: Add boot option for DFU ...

DFU is for device firmware upgrade, but for development purposes it's
sometmes useful to just start a kernel vie DFU. This adds a boot option
for doing this and also the corresponding counterpart on the host. With
this it's possible to boot a system with:

scripts/dfuboot.sh -k linuximage -d dtb -c "root=ubi0:root ubi.mtd=ubi rootfstype=ubifs ignore_loglevel"

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: Allow multiple defaultenvironment overlays ...

We can compile barebox for multiple boards at once, but currently
they all share a single default environment. This patch adds a
defaultenv_append() which boards can call to customize the default
environment during runtime. Each board now generate default environment
snippets using bbenv-y and add them during runtime with defaultenv_append()

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move defaultenv-2 to defaultenv/defaultenv-2-* ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move defaultenv-1 to defaultenv/defaultenv-1 ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: Align defaultenv array ...

The default environment buffer is an unsigned char array and thus
may be unaligned. Some decompression algorithms expect the buffer
to be sufficiently aligned for u32 accesses. We make this sure by
copying the default env to a temporary buffer. Instead of doing this
just add a __aligned(4) to the default environment.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

environment: Add function to load envfs from buffer ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

environment: constify arguments ...

The directory arguments to envfs_load and envfs_save can
be const.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

filetype: Add detection for barebox environment ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Kconfig: Select default compression type ...

Instead of asking explicitly for the default environment compression
type ask for the in-barebox default compression type. This also adds
a DEFAULT_COMPRESSION_SUFFIX make variable which can be used together
with the wildcard rules for compressed files to generate compressed
files without explicitly support each compression type.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>