Allocate memory for buffers at a cache-line boundary to avoid
misaligned buffer address for subsequent reads. This avoids an
additional sector-based memory copy in the fat file system driver:
FAT: Misaligned buffer address (...)
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Convert taken FPGA image "compatible" string to a binary compatible
flag and pass it to an FPGA driver.
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Tested-by: Ricardo Salveti <ricardo@foundries.io>
Tested-by: Adrian Fiergolski <adrian.fiergolski@fastree3d.com>
Link: https://lore.kernel.org/r/20220722141614.297383-9-oleksandr.suvorov@foundries.io
Signed-off-by: Michal Simek <michal.simek@amd.com>
These flags may be used to check whether an FPGA driver is able to
load a particular FPGA bitstream image.
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Tested-by: Ricardo Salveti <ricardo@foundries.io>
Tested-by: Adrian Fiergolski <adrian.fiergolski@fastree3d.com>
Link: https://lore.kernel.org/r/20220722141614.297383-7-oleksandr.suvorov@foundries.io
Signed-off-by: Michal Simek <michal.simek@amd.com>
At present we rely on the key blob being in the global_data fdt_blob
pointer. This is true in U-Boot but not with tools. For clarity, pass the
parameter around.
Signed-off-by: Simon Glass <sjg@chromium.org>
When, for various reasons, a bad FIT image is used where a loadable
image is marked as 0 length, attempt is made for a 0 length allocation and
read of 0 byte read operation.
Instead provide warning in log and skip attempting to do such a load.
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Aswath Govindraju <a-govindraju@ti.com>
cherry-picked from NXP code:
719d665a87c6: ("MLK-20467 imx8m: Fix issue for booting signed image through uuu")
which fixes secure boot on imx8m based boards. Problem was
that FIT header and so IVT header too, was loaded to
memallocated address. So the ivt header address coded
in IVT itself does not fit with the real position.
Signed-off-by: Heiko Schocher <hs@denx.de>
Tested-by: Tim Harvey <tharvey@gateworks.com>
add hook function spl_load_simple_fit_fix_load()
which is called after fit image header is loaded.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
clk:
- Add driver for Xilinx Clocking Wizard IP
fdt:
- Also record architecture in /fit-images
net:
- Fix plat/priv data handling in axi emac
- Add support for 10G/25G speeds
pca953x:
- Add missing dependency on i2c
serial:
- Fix dependencies for DEBUG uart for pl010/pl011
- Add setconfig option for cadence serial driver
watchdog:
- Add cadence wdt expire now function
zynq:
- Update DT bindings to reflect the latest state and descriptions
zynqmp:
- Update DT bindings to reflect the latest state and descriptions
- SPL: Add support for ECC DRAM initialization
- Fix R5 core 1 handling logic
- Enable firmware driver for mini configurations
- Enable secure boot, regulators, wdt
- Add support xck devices and 67dr
- Add psu init for sm/smk-k26 SOMs
- Add handling for MMC seq number via mmc_get_env_dev()
- Handle reserved memory locations
- Add support for u-boot.itb generation for secure OS
- Handle BL32 handoffs for secure OS
- Add support for 64bit addresses for u-boot.its generation
- Change eeprom handling via nvmem aliases
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Merge tag 'xilinx-for-v2021.10' of https://source.denx.de/u-boot/custodians/u-boot-microblaze into next
Xilinx changes for v2021.10
clk:
- Add driver for Xilinx Clocking Wizard IP
fdt:
- Also record architecture in /fit-images
net:
- Fix plat/priv data handling in axi emac
- Add support for 10G/25G speeds
pca953x:
- Add missing dependency on i2c
serial:
- Fix dependencies for DEBUG uart for pl010/pl011
- Add setconfig option for cadence serial driver
watchdog:
- Add cadence wdt expire now function
zynq:
- Update DT bindings to reflect the latest state and descriptions
zynqmp:
- Update DT bindings to reflect the latest state and descriptions
- SPL: Add support for ECC DRAM initialization
- Fix R5 core 1 handling logic
- Enable firmware driver for mini configurations
- Enable secure boot, regulators, wdt
- Add support xck devices and 67dr
- Add psu init for sm/smk-k26 SOMs
- Add handling for MMC seq number via mmc_get_env_dev()
- Handle reserved memory locations
- Add support for u-boot.itb generation for secure OS
- Handle BL32 handoffs for secure OS
- Add support for 64bit addresses for u-boot.its generation
- Change eeprom handling via nvmem aliases
On ARM64 secure OS can run as 64bit or 32bit that's why it is necessary to
record information about architecture that other code can read it and
properly pass it to TF-A and start in 64bit or 32bit mode.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
board_fit_image_post_process() passes only start and size of the image,
but type of the image is not passed. So pass fit and node_offset, to
derive information about image to be processed.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Tero Kristo <kristo@kernel.org>
This has the uclass enforce calling detect() before other methods. This
allows drivers to cache information in detect() and perform (cheaper)
retrieval in the other accessors. This also modifies the only instance
where this sequencing was not followed.
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Commit 4afc4f37c7 ("doc: FIT image: Clarify format and simplify
syntax") and delegated FPGA images to be added via the list of
"loadables" in lieu of the "fpga" property. Now actually implement
this in code.
Note that the "compatible" property is ignored for the time being, as
implementing "compatible" loading is beyond the scope of this change.
However, "u-boot,fpga-legacy" is accepted without warning.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Commit 4afc4f37c7 ("doc: FIT image: Clarify format and simplify
syntax") requires that FPGA images be referenced through the
"loadables" in the config node. This means that "fpga" properties in
config nodes are deprecated.
Given that there are likely FIT images which use "fpga", let's not
break those right away. Print a warning message that such use is
deprecated, and give users a couple of releases to update their
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The FPGA loading code in spl_simple_fit_read() can easily be separated
from the rest of the logic. It is split into two functions instead of
one because spl_fit_upload_fpga() is used in a subsequent patch.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
spl_load_fit_image() will try to load an image at the address given
in the "load" property. Absent such property, it uses
image_info->load_addr
Correct use of this is demonstrated in spl_fit_append_fdt(), which
resets the 'load_addr' before each spl_load_fit_image() call.
On the other hand loading "loadables" loop in spl_load_simple_fit()
completely ignores this. It re-uses the same structure, but doesn't
reset load_addr. If loadable [i] does not have a "load" property, its
load address defaults to load_addr, which still contains the address
of loadable [i - 1].
A simple solution is to treat NULL as an invalid load address. The
caller can set load_addr = 0 to request an abort if the "load"
property is absent.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present this casts addresses to pointers so cannot work with sandbox.
Update the code to use map_sysmem() instead.
As part of this change, the existing load_ptr is renamed to src_ptr since
it is not a pointer to load_addr. It is confusing to use a similar name
for something that is not actually related. For the alignment code,
ALIGN() is used instead of open-coded alignment. Add a comment to the line
that casts away a const.
Use a (new) load_ptr variable to access memory at address load_addr.
Signed-off-by: Simon Glass <sjg@chromium.org>
When a FIT config specifies a devicetree, we should load it, no
questions asked. In the case of the "simple" FIT loading path, a
difficulty arises in selecting the load address of the FDT.
The default FDT location is right after the "kernel" or "firmware"
image. However, if that is an OP-TEE image, then the FDT may end up in
secure DRAM, and not be accessible to normal world kernels.
Although the best solution is to be more careful about the FDT
address, a viable workaround is to only append the FDT after a u-boot
or Linux image. This is identical to the previous logic, except that
FDT loading is extended to IH_OS_LINUX images.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Use the IS_ENABLED() macro to control code flow, instead of the
caveman approach of sprinkling #ifdefs. Code size is not affected, as
the linker garbage-collects unused functions. However, readability is
improved significantly.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The configuration node a sub node under "/configurations", which
describes the components to load from "/images". We only need to
locate this node once.
However, for each component, spl_fit_get_image_name() would parse the
FIT image, looking for the correct node. Such work duplication is not
necessary. Instead, once the node is found, cache it, and re-use it.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When a desired configuration is not found, conf_node will have a
negative value. Thus the for loop will start at the root "/" node of
the image, print the "/description" property, and stop.
It appears the intent of the loop was to print the names of the
subnodes under "/configurations". We would need the offset to the
"/configurations" node, which is abstracted by fit_find_config_node().
This change agrees that abstracting the node offset is the correct
design, and we shouldn't be parsing the configurations manually. Thus
the loop in spl_fit_get_image_name() is useless. Remove it.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Several loose arguments describe the FIT image. They are thus related,
and it makes sense to pass them together, in a structure. Examples
include the FIT blob pointer, offset to FDT nodes, and the offset to
external data.
Use a spl_fit_info structure to group these parameters.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The logical steps in spl_load_simple_fit() are difficult to follow.
I think the long comments, ifdefs, and ungodly number of variables
seriously affect the readability. In particular, it violates section 6
of the coding style, paragraphs (3), and (4).
The purpose of this patch is to improve the situation by
- Factoring out initialization and parsing to separate functions
- Reduce the number of variables by using a context structure
This change introduces no functional changes.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The size is derived from the FIT image itself. Any alignment
requirements are machine-specific and known by the board code. Thus
the total length can be derived from the FIT image and knowledge of
the platform. The 'length' argument is redundant. Remove it.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
CC: Matt Porter <mporter@konsulko.com>
Move this out of the common header and include it only where needed. In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly. Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
When the hash check fails on a loadable image, the SPL/TPL simply
jump to the next one. This commit changes this behaviour, when the
hash check fails on a loadable image, the function spl_load_simple_fit
stops and report an error.
Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Fit images were loaded to a buffer provided by spl_get_load_buffer().
This may work when the FIT image is small and fits between the start
of DRAM and SYS_TEXT_BASE.
One problem with this approach is that the location of the buffer may
be manipulated by changing the 'size' field of the FIT. A maliciously
crafted FIT image could place the buffer over executable code and be
able to take control of SPL. This is unacceptable for secure boot of
signed FIT images.
Another problem is with larger FIT images, usually containing one or
more linux kernels. In such cases the buffer be be large enough so as
to start before DRAM (Figure I). Trying to load an image in this case
has undefined behavior.
For example, on stm32mp1, the MMC controller hits a RX overrun error,
and aborts loading.
_________________
| FIT Image |
| |
/===================\ /=====================\
|| DRAM || | DRAM |
|| || | |
||_________________|| SYS_TEXT_BASE | ___________________ |
| | || FIT Image ||
| | || ||
| _________________ | SYS_SPL_MALLOC_START || _________________ ||
|| malloc() data || ||| malloc() data |||
||_________________|| |||_________________|||
| | ||___________________||
| | | |
Figure I Figure II
One possibility that was analyzed was to remove the negative offset,
such that the buffer starts at SYS_TEXT_BASE. This is not a proper
solution because on a number of platforms, the malloc buffer() is
placed at a fixed address, usually after SYS_TEXT_BASE. A large
enough FIT image could cause the malloc()'d data to be overwritten
(Figure II) when loading.
/======================\
| DRAM |
| |
| | CONFIG_SYS_TEXT_BASE
| |
| |
| ____________________ | CONFIG_SYS_SPL_MALLOC_START
|| malloc() data ||
|| ||
|| __________________ ||
||| FIT Image |||
||| |||
||| |||
Figure III
The solution proposed here is to replace the ad-hoc heuristics of
spl_get_load_buffer() with malloc(). This provides two advantages:
* Bounds checking of the buffer region
* Guarantees the buffer does not conflict with other memory
The first problem is solved by constraining the buffer such that it
will not overlap currently executing code. This eliminates the chance
of a malicious FIT being able to replace the executing SPL code prior
to signature checking.
The second problem is solved in conjunction with increasing
CONFIG_SYS_SPL_MALLOC_SIZE. Since the SPL malloc() region is
carefully crafted on a per-platform basis, the chances of memory
conflicts are virtually eliminated.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit add the support of signature check for config node
in spl/tpl when the function spl_load_simple_fit is used.
Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This uclass is intended to provide a way to obtain information about a
U-Boot board. But the concept of a U-Boot 'board' is the whole system,
not just one circuit board, meaning that 'board' is something of a
misnomer for this uclass.
In addition, the name 'board' is a bit overused in U-Boot and we want to
use the same uclass to provide SMBIOS information.
The obvious name is 'system' but that is so vague as to be meaningless.
Use 'sysinfo' instead, since this uclass is aimed at providing information
on the system.
Rename everything accordingly.
Note: Due to the patch delta caused by the symbol renames, this patch
shows some renamed files as being deleted in one place and created in
another.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
SPL is creating fit-images DT node when loadables are recorded in selected
configuration. Entries which are created are using entry-point and
load-addr property names. But there shouldn't be a need to use non standard
properties because entry/load are standard FIT properties. But using
standard FIT properties enables option to use generic FIT functions to
descrease SPL size. Here is result for ZynqMP virt configuration:
xilinx_zynqmp_virt: spl/u-boot-spl:all -82 spl/u-boot-spl:rodata -22 spl/u-boot-spl:text -60
The patch causes change in run time fit image record.
Before:
fit-images {
uboot {
os = "u-boot";
type = "firmware";
size = <0xfd520>;
entry-point = <0x8000000>;
load-addr = <0x8000000>;
};
};
After:
fit-images {
uboot {
os = "u-boot";
type = "firmware";
size = <0xfd520>;
entry = <0x8000000>;
load = <0x8000000>;
};
};
Replacing calling fdt_getprop_u32() by fit_image_get_entry/load() also
enables support for reading entry/load properties recorded in 64bit format.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Some boards, specifically 64-bit Allwinner boards (sun50i), are
extremely limited on SPL size. One strategy that was used to make space
was to remove the FIT "os" property parsing code, because it uses a
rather large lookup table.
However, this forces the legacy FIT parsing code path, which requires
the "firmware" entry in the FIT to reference the U-Boot binary, even if
U-Boot is not the next binary in the boot sequence (for example, on
sun50i boards, ATF is run first).
This prevents the same FIT image from being used with a SPL with
CONFIG_SPL_FIT_IMAGE_TINY=n and CONFIG_SPL_ATF=y, because the boot
method selection code looks at `spl_image.os`, which is only set from
the "firmware" entry's "os" property.
To be able to use CONFIG_SPL_ATF=y, the "firmware" entry in the FIT
must be ATF, and U-Boot must be a loadable. For this to work, we need to
parse the "os" property just enough to tell U-Boot from other images, so
we can find it in the loadables list to append the FDT, and so we don't
try to append the FDT to ATF (which could clobber adjacent firmware).
So add the minimal code necessary to distinguish U-Boot/non-U-Boot
loadables with CONFIG_SPL_FIT_IMAGE_TINY=y. This adds about 300 bytes,
much less than the 7400 bytes added by CONFIG_SPL_FIT_IMAGE_TINY=n.
Acked-by: Patrick Wildt <patrick@blueri.se>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This reverts commit eb39d8ba5f.
The commit breaks booting of fitImage by SPL, the system simply hangs.
This is because on arm32, the fitImage and all of its content can be
aligned to 4 bytes and U-Boot expects just that.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Reuben Dowle <reuben.dowle@4rf.com>
Cc: Tom Rini <trini@konsulko.com>
Signed-off-by: Marek Vasut <marex@denx.de>
The patch does sed 's/SPL_FPGA_SUPPORT/SPL_FPGA/g' but also fixing Makefile
and zynqmp.c to simplify if/endif logic in zynqmp.c.
This change is mostly done to be able to use CONFIG_IS_ENABLED macro and
obj-$(CONFIG_$(SPL_)FPGA) in Makefile. For them symbols need to be in sync.
And removing one line from Topic Miami boards which is not needed because
symbol is not enabled via Kconfig.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
If uboot does not embed its device tree and the FIT loading function
returns error in case of failure in the FDT append, the redundant itb
image could be loaded.
cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.
Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.
Signed-off-by: Simon Glass <sjg@chromium.org>
The free() function checks if its argument is NULL. It is superfluous to do
the same check on the calling side.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Commit cf8dcc5d02 ("common: spl_fit: Default to IH_OS_U_BOOT if
FIT_IMAGE_TINY enabled") is not correct, it will append fdt to each loadable
image. Actually when using TINY FIT, the first loadable image is thought as
u-boot and already have fdt appended.
Signed-off-by: Ye Li <ye.li@nxp.com>
Tested-by: Fabio Estevam <festevam@gmail.com>
Allow reading compressed content from fit image, even if
CONFIG_SPL_OS_BOOT is not set.
This allow booting compressed 2nd stage u-boot from fit image.
Additionally, do not print warning message if compression node is not
found, since it simply implies the content is uncompressed.
Signed-off-by: Klaus H. Sorensen <khso@prevas.dk>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
spl_fit_get_image_name() is used to get the names of the images that the
SPL must load from the FIT. It relies on the content of a property present
in the FIT. The list of images is thus statically defined in the FIT.
With this scheme, it quickly becomes hard to manage combinations of more
than a handful of images.
To address this problem, give the board driver code the opportunity to
add to the list of images. The images from the FIT property are loaded
first, and then the board_get_fit_loadable() is called to get more image
names.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
There is no need for it to be non-constant. Making it constant, allows to
return constant string without warning.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
There are many ways the overlay application can fail.
2 of them are probably the most common:
- the application itself failed. Usually this is comes from an unresolved
reference
- DTBO not available in FIT (could be because of a typo)
In both case it is good to be more explicit about the error and at least
show which overlay is failing.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
If one overlay that must be applied cannot be found in the FIT, the current
implementation stops applying the overlays. Let's make it skip only the
failing overlay instead.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
If the node describing an overlay does not specify a load address, it will
be loaded at the address previously used.
Fixing it by allocating a temporary buffer that will be used as a
default load address. By default, the size of the buffer is 64kB which
should be plenty for most use cases.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Make room in the FDT before applying the overlay, otherwise it may fail if
the overlay is big. As the exact added size is not known in advance, just
add the size of the overlay.
Move after the end of the application of the overlays, the resize of the
FDT for the injection of the details on the loadables.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
doc/uImage.FIT/overlay-fdt-boot.txt is describing how to create FIT
image with DT overlays in it.
Add support for this feature to SPL.
Here is the ZynqMP fragment where dtb points to full DT and dtbo is
overlay which should be applied on the top of dtb.
config {
description = "ATF with full u-boot overlay";
firmware = "atf";
loadables = "uboot";
fdt = "dtb", "dtbo";
};
The whole feature depends on OF_LIBFDT_OVERLAY which is adding +4kB code
and 0 for platforms which are not enabling this feature.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When u-boot.img is a FIT image generated automatically by mkimage, the
configuration node has the following structure:
conf-1 {
description = "k3-am654-base-board";
firmware = "firmware-1";
loadables = "firmware-1";
fdt = "fdt-1";
};
The firmware is referenced twice. Once by the 'firmware' property and
once by the 'loadables' property. Currently this result in the firmware
being loaded twice. This is not a big problem but has an impact on the
boot time.
Fixing it by not loading a loadable image if it is also the firmware image.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Andreas Dannenberg <dannenberg@ti.com>
CONFIG_SECURE_BOOT is too generic and forbids to use it for cross
architecture purposes. If Secure Boot is required for imx, this means to
enable and use the HAB processor in the soc.
Signed-off-by: Stefano Babic <sbabic@denx.de>
As part of the SPL FIT boot flow, the device tree is appended to U-Boot
proper. The device tree is used to record information on the loadables
to make them available to the SPL framework and U-Boot proper. Depending
on the U-Boot device tree provider, the FIT image might not include a
device tree. Information on the loadables is missing in this case.
When booting via firmware bundled with the FIT image, U-Boot SPL loads
the firmware binary and U-Boot proper before starting the firmware. The
firmware, in turn, is responsible for starting U-Boot proper.
Information on the memory location of the U-Boot proper loadable must be
available to the SPL framework so that it can be passed to the firmware
binary. To support this use case when no device tree is found in the FIT
image, fall back to the U-Boot device tree in this situation.
At the same time, update the comment to remove the note that the
destination address must be aligned to ARCH_DMA_MINALIGN. Alignment is
only required as an intermediate step when reading external data. This
is automatically handled by spl_fit_append_fdt(). After reading the
external data, it is copied to the specified address, which does not
have to be aligned to ARCH_DMA_MINALIGN.
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
