Patrick Delaunay [Tue, 22 Mar 2022 16:08:43 +0000 (17:08 +0100)]
cmd: pxe_utils: sysboot: replace cls command by video_clear in PXE parser
Since the commit bfaa51dd4adf ("cmd: add serial console support
for the cls command") the cls command is not enough to clear the
video display when ANSI console is activated.
This patch clears the video device with the video_clear() API
before to display the bitmap used for the PXE background.
This patch avoids to display the LOGO, activated by default with
commit 7a8555d87136 ("video: Show the U-Boot logo by default").
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Patrice Chotard [Mon, 21 Mar 2022 08:13:37 +0000 (09:13 +0100)]
mtd: Update the way partitions are parsed
In case mtd_info's dev field is not populated (raw nand's case),
use the flash_node new field which reference the DT flash node where
can be found "partitions" node with "fixed-partitions" compatible.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> Cc: Farhan Ali <farhan.ali@broadcom.com> Cc: Heinrich Schuchardt <xypron.glpk@gmx.de> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Marek Behun <marek.behun@nic.cz> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Simon Glass <sjg@chromium.org> Cc: Wolfgang Denk <wd@denx.de>
Patrice Chotard [Mon, 21 Mar 2022 08:13:36 +0000 (09:13 +0100)]
mtd: Add flash_node in struct mtd_info
Currently, add_mtd_partitions_of() can be used only if dev field of
mtd_info struct is populated. It's the case, for example, for a spi nor
flash, which has a DT compatible "jedec,spi-nor" and an associated
device. mtd->dev is populated in spi_nor_scan().
But in case of a raw nand node, mtd_info's dev field can't be populated
as flash node has no compatible, so no associated device.
add_mtd_partitions_of() can't be used to parse "partitions" subnode.
To remove this constraint, add an ofnode field in mtd_info struct
which reference the DT flash node. This new field is populated by
nand_scan_tail(). This new field will be used by add_mtd_partitions_of()
to parse the flash node for "partitions" defined in DT.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> Cc: Farhan Ali <farhan.ali@broadcom.com> Cc: Heinrich Schuchardt <xypron.glpk@gmx.de> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Marek Behun <marek.behun@nic.cz> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Simon Glass <sjg@chromium.org> Cc: Wolfgang Denk <wd@denx.de>
Paul HENRYS [Thu, 17 Mar 2022 09:29:47 +0000 (10:29 +0100)]
drivers: led: bcm6858: Set a default brightness when probing LEDs
When probing the LEDs, a default brightness is set based on settings
from the U-Boot device tree, i.e. the 'default-brightness' property
of the LED nodes. If that property is not present, the default
maximum brightness is set.
This should make sure the LED controller's registers affecting the
brightness are correctly initialized and should give a consistent
behaviour.
Signed-off-by: Paul HENRYS <paul.henrys_ext@softathome.com>
Jérôme Carretero [Tue, 15 Mar 2022 20:34:51 +0000 (16:34 -0400)]
spl: allow boot from first bootable partition
This was implemented in order to get dual-slot bootloader
partitions on the BeagleBone Black, whose MLO boots from
the first bootable partition: MLO chainloads u-boot in the
same way.
Signed-off-by: Jérôme Carretero <cJ-uboot@zougloub.eu> Reviewed-by: Tom Rini <trini@konsulko.com>
Dhananjay Phadke [Tue, 15 Mar 2022 17:19:32 +0000 (10:19 -0700)]
lib/crypto: support sha384/sha512 in x509/pkcs7
Set digest_size SHA384 and SHA512 algorithms in pkcs7 and x509,
(not set by ported linux code, but needed by __UBOOT__ part).
EFI_CAPSULE_AUTHENTICATE doesn't select these algos but required for
correctness if certificates contain sha384WithRSAEncryption or
sha512WithRSAEncryption OIDs.
Ivan Vozvakhov [Sat, 12 Mar 2022 10:03:14 +0000 (13:03 +0300)]
led: led_pwm: Add a driver for LEDs connected to PWM
Add a driver which allows to use of LEDs connected
to PWM (Linux compatible).
MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm
C(required during new functionality adding).
Signed-off-by: Ivan Vozvakhov <i.vozvakhov@corp.mail.ru>
SESA644425 [Wed, 9 Mar 2022 09:27:17 +0000 (01:27 -0800)]
lib: rsa: Update function padding_pss_verify (any-salt)
Modify function to support any salt length instead of max
length only. Function now detects salt length by parsing
the content of db buffer. Note that it works with (but is
not limited to) zero-length, digest-length and max-length
Signed-off-by: SESA644425 <gioja.hermann@non.se.com> Reviewed-by: Simon Glass <sjg@chromium.org>
SESA644425 [Wed, 9 Mar 2022 09:27:16 +0000 (01:27 -0800)]
lib: rsa: Leverage existing data buffer instead of systematic copy
Prior to introduction of modifications in rsassa_pss functions
related to padding verification, doing a pass to reduce memory
consumption of function by replacing memory copies of parts of
const buffer by pointers to the original buffer (masked_db and
h are subparts of msg buffer which is declared const, salt is a
subpart of db which is a working buffer, unmodified after being
filled). New pointers scope is limited to the function where
they are declared (not returned to caller by any mean), zeroing
risk of memory fault related to the change.
Signed-off-by: SESA644425 <gioja.hermann@non.se.com> Reviewed-by: Simon Glass <sjg@chromium.org>
SESA644425 [Wed, 9 Mar 2022 09:27:15 +0000 (01:27 -0800)]
lib: rsa: Fix const-correctness of rsassa_pss functions
Prior to introduction of modifications in rsassa_pss functions
related to padding verification, doing a pass to update
const-correctness in targeted functions to comply with
coding-rules and avoid const-cast
Signed-off-by: SESA644425 <gioja.hermann@non.se.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Patrick Delaunay [Tue, 29 Mar 2022 12:21:25 +0000 (14:21 +0200)]
configs: add support of OPTEE RNG in stm32mp15 defconfig
When the RNG device is secured with OP-TEE, it is only accessible with
the HWRNG TA, the CONFIG_RNG_OPTEE is needed for STM32MP15 targets
with OP-TEE support.
The probe of this RNG driver fails when the TA is not available in OP-TEE
and the previous driver can be used, as CONFIG_RNG_STM32MP1 is activated
and when the associated node is activated in the device tree with:
&rng1 {
status = "okay";
};
When the RNG is used in OP-TEE, this node should be deactivated in
the Linux and U-Boot device tree.
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Patrick Delaunay [Tue, 29 Mar 2022 12:21:23 +0000 (14:21 +0200)]
rng: add OP-TEE based Random Number Generator
Add driver for OP-TEE based Random Number Generator on ARM SoCs
where hardware entropy sources are not accessible to normal world
and the RNG service is provided by a HWRNG Trusted Application (TA).
This driver is based on the linux driver: char/hw_random/optee-rng.c
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
To quote the author:
This series adds support for running valgrind against U-Boot's internal
malloc. This allows for much more useful reports to be generated.
Some example output of valgrind run against u-boot/master with this
branch applied may be found at [1]. Note that valgrind gives up around
acpi. This feature still needs a lot of work on suppressions/hints to
filter out the noise properly.
Sean Anderson [Wed, 23 Mar 2022 18:04:49 +0000 (14:04 -0400)]
malloc: Annotate allocator for valgrind
This annotates malloc and friends so that valgrind can track the heap. To
do this, we need to follow a few rules:
* Call VALGRIND_MALLOCLIKE_BLOCK whenever we malloc something
* Call VALGRIND_FREELIKE_BLOCK whenever we free something (generally after
we have done our bookkeeping)
* Call VALGRIND_RESIZEINPLACE_BLOCK whenever we change the size of an
allocation. We don't record the original request size of a block, and
neither does valgrind. For this reason, we pretend that the old size of
the allocation was for 0 bytes. This marks the whole allocaton as
undefined, so in order to mark all bits correctly, we must make the whole
new allocation defined with VALGRIND_MAKE_MEM_DEFINED. This may cause us
to miss some invalid reads, but there is no way to detect these without
recording the original size of the allocation.
In addition to the above, dlmalloc itself tends to make a lot of accesses
which we know are safe, but which would be unsafe outside of dlmalloc. For
this reason, we provide a suppression file which ignores errors ocurring in
dlmalloc.c
Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Sean Anderson [Wed, 23 Mar 2022 18:04:48 +0000 (14:04 -0400)]
Add valgrind headers to U-Boot
Valgrind uses magic code sequences to define an ABI that the client may use
to request behavior from the host. In particular, this may be used to
inform valgrind about custom allocators, such as the one used in U-Boot.
This adds headers defining these sequences to U-Boot. It also adds a config
option to disable emission of these sequences entirely, in the (likely)
event that the user does not wish to use valgrind. Note that this option is
called NVALGRIND upstream, but was renamed (and inverted) to
CONFIG_VALGRIND. Aside from this and the conversion of a few instances of
VALGRIND_DO_CLIENT_REQUEST_EXPR to STMT, these headers are unmodified.
These headers were copied from valgrind 3.16.1-4 as distributed in Arch
Linux. They are licensed with the bzip2 1.16 license. This appears to be a
BSD license with some clauses from Zlib.
Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Tom Rini [Sun, 10 Apr 2022 15:21:39 +0000 (11:21 -0400)]
Merge tag 'efi-2022-07-rc1' of https://source.denx.de/u-boot/custodians/u-boot-efi
Pull request for efi-2022-07-rc1
Documentation:
* Describe how enable DM_SERIAL for a board
UEFI
* Preparatory patches for better integration of DM and UEFI
* Use sysreset after capsule updates instead of do_reset
* Allow to disable persisting non-volatile variables
This commit broke environment on literally every board I have access
to, with this revert in place, environment works as it should again.
The problem I observe with this patch is that saved environment in
either SPI NOR or eMMC is never used, the system always falls back
to default environment. The 'saveenv' command does succeed, but then
after reset, the default env is again used.
Furthermore, the commit introduced duplicate code in env_init(), this:
"
if (!prio) {
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = ENV_INVALID;
Also note that upstream does not support UltraZed EG board, so
this might have been a patch pulled from downstream which did
depend on some other downstream behavior.
Signed-off-by: Marek Vasut <marex@denx.de> Cc: Felix.Vietmeyer@jila.colorado.edu <felix.vietmeyer@jila.colorado.edu> Cc: Tom Rini <trini@konsulko.com>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:46 +0000 (20:36 +0900)]
dm: add tag support
With dm-tag feature, any U-Boot subsystem is allowed to associate
arbitrary number of data with a particular udevice. This can been
see as expanding "struct udevice" without modifying the definition.
As a first user, UEFI subsystem makes use of tags to associate
an efi_disk object with a block device.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:45 +0000 (20:36 +0900)]
virtio: call device_probe() in scanning
virtio_init() enumerates all the peripherals that are to be materialised
with udevices(UCLASS_VIRIO) and creates particular device instances
(UCLASS_BlK or whatever else) as children.
On the other hand, device_probe() won't be invoked against those resultant
udevices unlike other ordinary device drivers do in the driver model.
This is particularly inconvenient when we want to add "event notification"
callback so that we will be able to automatically create all efi_disk
objects in a later patch.
With this patch applied, "virtio scan" will work in a similar way
to "scsi rescan", "usb start" or others in term of 'probe' semantics.
I didn't add this change to virtio_init() itself because this function
may be called in board_init_r() (indirectly in board_late_init())
before UEFI subsustem is initialized.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:44 +0000 (20:36 +0900)]
block: ide: call device_probe() after scanning
Every time an ide bus/port is scanned and a new device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:43 +0000 (20:36 +0900)]
sata: call device_probe() after scanning
Every time a sata bus/port is scanned and a new device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:42 +0000 (20:36 +0900)]
nvme: call device_probe() after scanning
Every time a nvme bus/port is scanned and a new device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:41 +0000 (20:36 +0900)]
mmc: call device_probe() after scanning
Every time a mmc bus/port is scanned and a new device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:40 +0000 (20:36 +0900)]
usb: storage: call device_probe() after scanning
Every time a usb bus/port is scanned and a new device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
AKASHI Takahiro [Tue, 8 Mar 2022 11:36:39 +0000 (20:36 +0900)]
scsi: call device_probe() after scanning
Every time a scsi bus/port is scanned and a new block device is detected,
we want to call device_probe() as it will give us a chance to run
additional post-processings for some purposes.
In particular, support for creating partitions on a device will be added.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
Masami Hiramatsu [Mon, 21 Mar 2022 13:37:56 +0000 (22:37 +0900)]
efi_loader: Use sysreset instead of reset command
Use sysreset_walk_halt() directly from reset-after-capsule-on-disk
feature to reboot (cold reset) machine instead of using reset command
interface, since this is not a command.
Note that this will make CONFIG_EFI_CAPSULE_ON_DISK depending on
the CONFIG_SYSRESET.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
Masami Hiramatsu [Mon, 21 Mar 2022 13:37:45 +0000 (22:37 +0900)]
efi_loader: Make efi_load_capsule_drivers() available even if EFI_CAPSULE_ON_DISK=n
Make efi_load_capsule_drivers() available even if EFI_CAPSULE_ON_DISK
is disabled because the caller (efi_init_obj_list()) expects it only
relays on EFI_HAVE_CAPSULE_SUPPORT.
Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
Masami Hiramatsu [Mon, 21 Mar 2022 13:37:35 +0000 (22:37 +0900)]
cmd: efidebug: Disable 'capsule disk-update' when CONFIG_EFI_CAPSULE_ON_DISK=n
Disable 'capsule disk-update' option for the efidebug command
when CONFIC_EFI_CAPSULE_ON_DISK is disabled, because this option
is available only when the EFI capsule update on disk is enabled.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org> Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tom Saeger [Tue, 22 Mar 2022 21:21:10 +0000 (15:21 -0600)]
efi_loader: optional persistence of variables
Since be66b89da306 ("efi_loader: configuration of variables store")
the choice of EFI_VARIABLE_FILE_STORE or EFI_MM_COMM_TEE
is mutually-exclusive, however efi_var_to_file also allows
for "neither". Provide an additional Kconfig option.
Signed-off-by: Tom Saeger <tom.saeger@oracle.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Eddie James [Mon, 7 Feb 2022 23:09:01 +0000 (17:09 -0600)]
gpio: Enable hogging support in SPL
Use the CONFIG macros to conditionally build the GPIO hogging support in
either the SPL or U-Boot, or both, depending on the configuration. Also
call the GPIO hog probe function in the common SPL board initialization
as an equivalent to adding it to the U-Boot init sequence functions.
Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Andrew Jeffery [Mon, 31 Jan 2022 03:24:05 +0000 (13:54 +1030)]
gpio: Add gpio_request_by_line_name()
Add support for the upstream gpio-line-names property already described
in the common GPIO binding document[1]. The ability to search for a line
name allows boards to lift the implementation of common GPIO behaviours
away from specific line indexes on a GPIO controller.
Tom Rini [Wed, 30 Mar 2022 22:07:23 +0000 (18:07 -0400)]
spi: cadence_qspi: Migrate CONFIG_CQSPI_REF_CLK to Kconfig
This is a little tricky since SoCFPGA has code to determine this as
runtime. Introduce a guard variable for platforms to select if they
have a static value to use. Then for ARCH_SOCFPGA, call
cm_get_qspi_controller_clk_hz() and otherwise continue the previous
behavior.
Cc: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Wed, 30 Mar 2022 22:07:18 +0000 (18:07 -0400)]
corvus: Migrate CONFIG_*_LED out of CONFIG namespace
This code is only used on the corvus platform, so migrate the LED on/off
code to this platform and remove it from the CONFIG namespace. In
theory, this should likely be moved to the modern GPIO LED driver as a
further cleanup.
Tom Rini [Wed, 30 Mar 2022 22:07:16 +0000 (18:07 -0400)]
s5p_goni, smdkc100: Move some environment settings out of CONFIG
A number of CONFIG options are used on these platforms as part of the
default environment. Set some of these more directly and in other
cases, just reference them directly.
Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Wed, 30 Mar 2022 22:07:15 +0000 (18:07 -0400)]
arm: integrator: Migrate platform-specific options and cleanup armcoremodule.h
This converts the following to Kconfig:
CONFIG_CM_INIT
CONFIG_CM_REMAP
CONFIG_CM_SPD_DETECT
CONFIG_CM_MULTIPLE_SSRAM
CONFIG_CM_TCRAM
We make the first three of these options be always enabled, as that
matches usage. We select the last two based on how they were defined in
armcoremodule.h. This also allows us to remove some unused code in
board/armltd/integrator/lowlevel_init.S
Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Tom Rini <trini@konsulko.com>
Tom Rini [Fri, 8 Apr 2022 12:27:50 +0000 (08:27 -0400)]
Merge branch '2022-04-08-env-updates'
- Assorted env tooling updates
- Bug fix around multiple possible env locations and ENV_IS_NOWHERE
- Add 'indirect' sub-command to env
- Allow for FAT env to have the location overridden by the board code.
Simon Glass [Sun, 13 Mar 2022 05:47:49 +0000 (22:47 -0700)]
env: Allow text-env tests to run with awk
At present the tests assume that gawk is being used. Adjust the tests so
that the names are inserted in alphabetical order, so that awk is happy.
Also use PROCINFO to make gawk output in alphabetical order. This is not
ideal, since it changes the env-car ordering from what the user provided,
but it may be acceptable.
Signed-off-by: Simon Glass <sjg@chromium.org> Reported-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Fixes: https://source.denx.de/u-boot/u-boot/-/issues/10
This will sort the default environment file generated by
"make u-boot-initial-env", but won't sort the default
environment in the compiled u-boot binary. The file
u-boot-initial-env is considered to use for the userpace
environment access tools [1] in case of that the
environments is written the first time into its location.
This is done on the one hand for a better overview and
comparison of the generated environment file. On the other
hand it is to synchronize the output with the script
get_default_env.sh, which generated a sorted default
environment file. The sorting preserves the order of equal
variable names by sorting only the variable name, and
disable the last-resort comparison. After sorting,
unnoticed blank lines at the end move to the top. Avoid
that by removing it before sorting.
[1] https://github.com/sbabic/libubootenv
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com> Reviewed-by: Stefano Babic <sbabic@denx.de> Tested-by: Stefano Babic <sbabic@denx.de> Cc: Stefano Babic <sbabic@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Marek Behún <marek.behun@nic.cz>
To: u-boot@lists.denx.de Reviewed-by: Simon Glass <sjg@chromium.org>
env: Load env when ENV_IS_NOWHERE is only location selected
This patch prevent u-boot from hanging on a UltraZed EG board (zynqmp).
Without the patch,
(drv = env_driver_lookup(ENVOP_INIT, prio))
evaluates to 0, causing prio = 0
Then, (!prio) is hit, returning -ENODEV causing a stall.
With the patch,
instead of returning -ENODEV and causing a stall, we
set gd->env_addr (is this really needed?)
and then
mark gd->env_valid = ENV_INVALID to use the default env.
Fabio Estevam [Sat, 26 Mar 2022 14:47:40 +0000 (11:47 -0300)]
imx8/ls10xx: Use a sane SYS_MALLOC_F_LEN default
When adding new features to imx8m boards, such as DM clock support,
the malloc area can be exhausted.
To avoid such issue, provide a reasonable default for the
SYS_MALLOC_F_LEN size.
Quoting Tom Rini:
"This seems to be an area where everyone is either:
- Kicking the value up a bit for themselves
- Having hard to figure out problems booting the platform because it's
too small a value until they see someone else picked a larger value.
So lets raise these a bit and get some acks, please."
Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Fabio Estevam <festevam@denx.de> Tested-by: Adam Ford <aford173@gmail.com> #imx8mm-beacon, imx8mn-beacon Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
This series collects together various misc patches that were needed when
building mainline U-Boot against Chromium OS verified boot. Most of them
fix minor bugs.
Simon Glass [Mon, 28 Feb 2022 19:08:32 +0000 (12:08 -0700)]
stdint: Add a definition of UINT8_MAX
This is normally defined in stdint.h but is not used in U-Boot. When
libraries (such as Chromium OS vboot) are built against U-Boot they may
expect this value to be available. Add it to avoid build errors in this
case.