ARM: bootm: be more clever while deciding where to put zImage ...

For small systems we would put the zImage at 8MiB after
the start of memory, and put the DT a bit after the zImage.
When we encounter an image which is bigger than 8MiB
uncompressed, the kernel would try to relocate itself
and overwrite the DT.

Try to be more clever at zImage placement to avoid
triggering the kernel relocation.

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

ARM: bootm: pass free memory to __do_bootm_linux ...

This improves the initrd/devicetree placement in the bootm code.
We used to put the initrd at the start of the kernel + 8MiB. This
of course fails once the kernel gets bigger than 8MiB. Also the
place for the devicetree was allocated using malloc(). This can
lead to the problem that the devicetree is outside of the kernels
lowmem and thus not reachable for the kernel.
With this patch __do_bootm_linux gets a pointer to free space where
the devicetree and the initrd can be safely put.

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

ARM: bootm: locate zImage higher into RAM ...

The zImage should be placed where it won't be overwritten by the
uncompressed image, otherwise the kernel decompressing code has
to relocate the zImage before decompression. As Kernels tend to
become bigger put it into 32MiB into RAM if we have enough RAM
available.

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

bootm: introduce bootm_load_initrd helper ...

Make the bootm handlers simpler by factoring out an initrd load
function.

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

ARM: bootm: move os loading to do_bootm_linux ...

__do_bootm_linux is called from the uImage, zImage and raw handlers.
In case of the zImage handler the kernel will already be loaded and
the kernel load code in __do_bootm_linux will do nothing. Move the
loading code to do_bootm_linux so that __do_bootm_linux will always
be called with the kernel already loaded.

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

bootm: introduce bootm_load_os helper ...

The common bootm code used to load uImage contents to SDRAM
before calling into the handlers if possible. This makes the
handlers complicated since they have to handle many cases. Instead,
introduce a helper to load the os after the handlers have figured
out a good load address.

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

ARM: boot barebox with kernel calling convention ...

Start a 2nd stage barebox with the Linux Kernel calling convention.
Right now barebox does not interpret ATAGs or devicetree passed
to it, but it doesn't hurt to pass parameters so that future bareboxes
can use them.

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

ARM: bootm: Print Kernel commandline unconditionally ...

The Kernel commandline is an important debugging aid when people
ask why their Kernel won't start, so print it unconditionally.
This is done in !dt mode anyway, so also do it with dt.

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

Merge branch 'for-next/of'

ARM: Using unsigned specifiers for unsigned arguments for printf ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

bootm: print Kernel commandline in verbose mode ...

Without devicetree support we print the Kernel commandline in
verbose mode. Do the same with devicetree boot aswell.

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

bootm: make sure to print fixed oftree ...

when doing bootm -v -v we dumped the original tree to the console.
Make sure to print the fixed tree instead so that the fixups can
be examined.

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

of: remove unused libfdt ...

Now that we are completely independent of libfdt remove the unused
code.

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

ARM bootm: Switch initrd support to unflattened tree ...

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

bootm: Pass unflattened devicetree to handlers ...

This makes it possible to modify the tree in the handlers.
This is necessary because the initrd addresses are only
known inside the handlers, but not to the generic bootm
code.

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

ARM: bootm: rework concatenated oftree ...

Without compiled in devicetree support we used to copy the
concatenated devicetree directly behind the zImage. This is
unnecessary, even if we do not have devicetree support we can
copy the devicetree whereever we like and pass the kernel a
pointer to it. This makes the code a bit easier.
While at it, add the missing free calls in the error case.

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

of: Pass barebox internal format devicetree to of_get_fixed_tree ...

With this every devicetree is first converted to the barebox internal
format before it's converted back to dtb again.

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

ARM bootm: Use of_get_fixed_tree ...

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

ARM bootm: only use concatenated oftree when no other is available ...

When an oftree is already specified use it. This lets the user
boot a kernel with an oftree he provided himself rather than
hardcoding the concatenated one.

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

ARM android image: remove double of_fix_tree ...

With bootm of_fix_tree() will already be called from the generic bootm
code, so do not do this again in the Android image handler.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

filetype: Pass bufsize ...

Pass the buffer size to the file detection code. This makes sure we do not
read past the buffer. This is especially useful for ext filesystem detection
as the magic is at byte offset 1080. Also introduce a FILE_TYPE_SAFE_BUFSIZE
define which is set to the minimum bufsize the detection code needs to detect
all known filetypes.

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

bootm: close open files ...

Signed-off-by: Vicente <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arm/bootm: fix initrd_start init ...

initrd_start need to be init to data->initrd_address and updated only if the
addr is invalid.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

bootm: Fix undefined reference to of_fix_tree ...

It's only available when oftree support is enabled.

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

resource: store 'end' instead of 'size' in struct resource ...

Storing the size instead of the resource end in struct resource was
a mistake. 'size' ranges from 0 to UINT[32|64]_MAX + 1 which obviously
leads to problems. 'end' on the other hand will never exceed
UINT[32|64]_MAX. Also this way we can express a iomem region covering
the whole address space.

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

booting: more flexible Linux bootargs generation ...

We currently use the environment variable 'bootargs' to get the
Linux bootargs. This patch allows for a more flexible bootargs
generation using global variables. With it the Linux bootargs
are concatenated from multiple variables. This allows to replace
parts of the bootargs string without having to reconstruct it
completely.
With this bootargs can be constructed like:

global linux.bootargs.base="console=ttyS0,115200"
global linux.bootargs.ip="ip=dhcp"
global linux.mtdparts="physmap-flash.0:512K(nor0.barebox),-(root)"

This will then automatically be combined into a kernel bootargs
string during boot.

If the 'linux.bootargs.' variables are all empty the old standard
'bootargs' way will be used.

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

Merge branch 'binfmt' of git://git.jcrosoft.org/barebox into next

arm: bootm: zImage: add error message when can not request the memory ...

This will allow to understand what happened.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arm: bootm: add barebox, zImage and aImage binfmt support ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

arm: fix zImage support when a oftree is concatenated ...

When a oftree is concatenated,the zImage is bigger than the size specified in
the zImage header. Detect it and copy it too.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>