Based loosely on the Linux kernel
Documentation/admin-guide/security-bugs.rst file, create a basic
security document for U-Boot. In sum, security issues should be
disclosed in public on the mailing list if at all possible as an initial
position.
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
The output of the sbi command has been changed since the last release of
the man-page. Update the example.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
The struct is only used to overlay the MMIO region, so the behavior is
the same. This obsoletes the Kconfig option for the number of ports.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Add documentation for the FWU Multi Bank Update feature. The document
describes the steps needed for setting up the platform for the
feature, as well as steps for enabling the feature on the platform.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Add support for setting OEM flags in the capsule header. As per the
UEFI specification, bits 0-15 of the flags member of the capsule
header can be defined per capsule GUID.
The oemflags will be used for the FWU Multi Bank update feature, as
specified by the Dependable Boot specification[1]. Bit
15 of the flags member will be used to determine if the
acceptance/rejection of the updated images is to be done by the
firmware or an external component like the OS.
[1] - https://git.codelinaro.org/linaro/dependable-boot/mbfw/uploads/6f7ddfe3be24e18d4319e108a758d02e/mbfw.pdf
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
The Dependable Boot specification[1] describes the structure of the
firmware accept and revert capsules. These are empty capsules which
are used for signalling the acceptance or rejection of the updated
firmware by the OS. Add support for generating these empty capsules.
[1] - https://git.codelinaro.org/linaro/dependable-boot/mbfw/uploads/6f7ddfe3be24e18d4319e108a758d02e/mbfw.pdf
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Add a command to read the metadata as specified in the FWU
specification and print the fields of the metadata.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Add bindings needed for accessing the FWU metadata partitions. These
include the compatible string which point to the access method and the
actual device which stores the FWU metadata.
The current patch adds basic bindings needed for accessing the
metadata structure on GPT partitioned block devices.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Add support for filtering out FIT images by phase. Rather than adding yet
another argument to this already overloaded function, use a composite
value, where the phase is only added in if needed.
The FIT config is still selected (and verified) as normal, but the images
are selected based on the phase.
Tests for this come in a little later, as part of the updated VPL test.
Signed-off-by: Simon Glass <sjg@chromium.org>
We want to be able to mark an image as related to a phase, so we can
easily load all the images for SPL or for U-Boot proper.
Add this to the FIT specification, along with some access functions.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present we normally write tests either in Python or in C. But most
Python tests end up doing a lot of checks which would be better done in C.
Checks done in C are orders of magnitude faster and it is possible to get
full access to U-Boot's internal workings, rather than just relying on
the command line.
The model is to have a Python test set up some things and then use C code
(in a unit test) to check that they were done correctly. But we don't want
those checks to happen as part of normal test running, since each C unit
tests is dependent on the associate Python tests, so cannot run without
it.
To acheive this, add a new UT_TESTF_MANUAL flag to use with the C 'check'
tests, so that they can be skipped by default when the 'ut' command is
used. Require that tests have a name ending with '_norun', so that pytest
knows to skip them.
Signed-off-by: Simon Glass <sjg@chromium.org>
The current name is inconsistent with SPL which uses CONFIG_SPL_TEXT_BASE
and this makes it imposible to use CONFIG_VAL().
Rename it to resolve this problem.
Signed-off-by: Simon Glass <sjg@chromium.org>
- simplefb rotation support
- support splash as raw image from MMC
- enhancements to Truetype console (multiple fonts and sizes)
- drop old LCD support
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Merge tag 'video-20221030' of https://source.denx.de/u-boot/custodians/u-boot-video
- fix [hv]sync active vs back porch in dw_mipi_dsi
- simplefb rotation support
- support splash as raw image from MMC
- enhancements to Truetype console (multiple fonts and sizes)
- drop old LCD support
Add a new 'font' command which allows the fonts to be listed as well as
selecting a different font and size.
Allow the test to run on sandbox, where multiple font/size combinations
are supported, as well as sandbox_flattree, where they are not.
Signed-off-by: Simon Glass <sjg@chromium.org>
In a couple of places the document says u-boot,pre-reloc but all
examples show u-boot,dm-pre-reloc, use the latter consistently.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
GPMC stands for General Purpose Memory Controller and it is
present on many Texas Instruments SoCs.
It supports a number of Asynchronous and Synchronous interfaces
and has various settings to configure the bus interface.
The DT bindings define all the various GPMC settings.
As the GPMC supports multiple devices on the bus, each
device is represented as a child and the respective
GPMC settings are situated there. (see ti,gpmc-child.yaml)
These binding docs are picked up from the Linux kernel.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
- nuvoton: add expire function for generic reset (Jim)
- handle watchdogs during keyed autoboot (Rasmus)
- cyclic: Don't disable cylic function upon exceeding CPU time (Stefan)
- ulp wdog: Updates to support iMX93 and DM (Alice)
This is a companion to u-boot,noautostart. If one has a single
watchdog device that one does want to have auto-started, but several
others that one doesn't, the only way currently is to set the
CONFIG_WATCHDOG_AUTOSTART and then use the opt-out for the majority.
The main motivation for this is to add an autostarted watchdog device
to the sandbox (to test a fix) without having to set AUTOSTART in
sandbox_defconfig and add the noautostart property to the existing
devices. But it's also nice for symmetry, and the logic in
init_watchdog_dev() becomes simpler to read because we avoid all the
negations.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
There are no platforms that have not migrated to using DM_KEYBOARD,
remove the legacy option.
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This adds support for the Kontron Electronics SoM SL i.MX8MM OSM-S
and the matching baseboard BL i.MX8MM OSM-S.
The SoM hardware complies to the Open Standard Module (OSM) 1.0
specification, size S (https://sget.org/standards/osm).
The existing board configuration for the non-OSM SoM is reused and
allows to detect the SoM variant at runtime.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
When a FIT includes some OS requests, U-Boot should process these and add
the requested info to corresponding subnodes of the /chosen node. Add a
pytest for this, which sets up the FIT, runs bootm and then uses a C
unit test to check that everything looks OK.
The test needs to run on sandbox_flattree since we don't support
device tree fixups on sandbox (live tree) yet. So enable BOOTMETH_VBE and
disable bootflow_system(), since EFI is not supported on
sandbox_flattree.
Add a link to the initial documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
Update this function's comment and also the livetree documentation, so it
is clear when to use the function.
Signed-off-by: Simon Glass <sjg@chromium.org>
The working FDT is the one which comes from the OS and is fixed up by
U-Boot. When the bootm command runs, it sets up the working FDT to be the
one it is about to pass to the OS, so that fixups can happen.
This seems like an important step, so add a message indicating that the
working FDT has changed. This is shown during the running of the bootm
command.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add xxd command to print file content as hexdump to standard out
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Roger Knecht <rknecht@pm.me>
This adds keyword devicetree-overlay as an alias for fdtoverlays in
extlinux (sysboot) and pxe to better follow the Boot Loader Specification
[1], improves documentation around them by adding an example for both
fdtoverlays and devicetree-overlay and the environment variable required
for this feature. The link for the spec is updated to the current one.
[1] https://systemd.io/BOOT_LOADER_SPECIFICATION/
Signed-off-by: Edoardo Tomelleri <e.tomell@gmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
We want tests to avoid the usage of sudo. Describe that virt-make-fs can
generate disk images without being root.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Packages python3-filelock python3-pytest-xdist as required to run
'make tests'. Add them to the required packages list in the documentation.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Provide a man-page for the cls command.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The XTRN_DECLARE_GLOBAL_DATA_PTR declarations in ppc code are permanently
commented out, so there are no users for this macro:
#if 1
#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r2")
#else /* We could use plain global data, but the resulting code is bigger */
#define XTRN_DECLARE_GLOBAL_DATA_PTR extern
#define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \
gd_t *gd
#endif
Remove all references to this macro, but add a documentation note regarding
the possibility of using plain global data for the GD pointer.
Signed-off-by: Ovidiu Panait <ovpanait@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
* Convert code comments in include/efi_driver.h to Sphinx style.
* Add include/efi_driver.h to the HTML documentation.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
At present ofnode_write_prop() is inconsistent between livetree and
flattree, in that livetree requires the caller to ensure the property
value is stable (e.g. in rodata or allocated) but flattree does not, since
it makes a copy.
This makes the API call a bit painful to use, since the caller must do
different things depending on OF_LIVE.
Add a new 'copy' argument which tells the function to make a copy if
needed. Add some tests to cover this behaviour.
Signed-off-by: Simon Glass <sjg@chromium.org>
The current tests do not cover all functions, nor do they cover the new
multi-tree functionality. Add and update the tests accordingly and update
the 'future work' notes in the documentation.
There is a still more testing needed for the failure cases, since at
present some ofnode functions return a libfdt error code instead of
converting it to an errno.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add the logic to redirect requests for the device tree through a function
which can look up the tree ID. This works by using the top bits of
ofnode.of_offset to encode a tree.
It is assumed that there will only be a few device trees used at runtime,
typically the control FDT (always tree ID 0) and possibly a separate FDT
to be passed the OS.
The maximum number of device trees supported at runtime is 8, with this
implementation. That would use bits 30:28 of the node-offset value,
meaning that the positive offset range is limited to bits 27:0, versus
30:1 with this feature disabled. That still allows a device tree of up
to 256MB, which should be enough for most FITs. Larger ones can be
supported by using external data with the FIT, or by enabling OF_LIVE.
Update the documentation a little and fix up the comment for
ofnode_valid().
Signed-off-by: Simon Glass <sjg@chromium.org>
Complete the list of commands influenced by the autostart environment
variable.
Make it clearer what values qualifies at 'yes'.
Eventually the list of environment variables is to be alphabetically
sorted. Move autostart up.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When the flat device tree changes it can mess up the live tree since that
uses the flat tree for its strings. This affects only a few sandbox tests
which modify the device tree, but the number will grow as ofnode support
for writing improves.
While the control FDT is not intended to change while U-Boot is running,
some tests do so. For example, the ofnode interface only supports
modifying properties in the control FDT, so tests must use that.
To solve this problem, keep a copy of the FDT and restore it as needed
when the test is finished. The copy only happens on sandbox (except SPL
builds), to reduce memory usage and because these tests are not useful on
other boards. For other boards, a checksum is taken to ensure that nothing
changes.
It would be possible to always checksum the FDT on sandbox and only
restore it if needed, but this is slightly slower than restoring it every
time, at least with crc8.
Move the code which checks for success to the very end, for clarity.
Signed-off-by: Simon Glass <sjg@chromium.org>
This is not needed and we should avoid typedefs. Use the struct instead
and rename it to indicate that it really is a legacy struct.
Signed-off-by: Simon Glass <sjg@chromium.org>
When running the script to sign SPL/U-Boot on a kontron-sl-mx8mm board,
the fit_block_size was calculated as 0x1000 instead of 0x1020.
Add an extra parenthesis pair to fix it.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Add HABv4 documentation extension for SPL targets covering the
following topics:
- How to sign an securely boot an flash.bin container image.
- How to extend the root of trust for additional boot images.
- Add SPL and fitImage CSF examples.
- Add signature generation script example.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Breno Lima <breno.lima@nxp.com>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Utkarsh Gupta <utkarsh.gupta@nxp.com>
Cc: Ye Li <ye.li@nxp.com>
We currently have an if_type (interface type) and a uclass id. These are
closely related and we don't need to have both.
Drop the if_type values and use the uclass ones instead.
Maintain the existing, subtle, one-way conversion between UCLASS_USB and
UCLASS_MASS_STORAGE for now, and add a comment.
Signed-off-by: Simon Glass <sjg@chromium.org>
This option is fact really related to SPL. For U-Boot proper we always use
driver model for block devices, so CONFIG_BLK is enabled if block devices
are in use.
It is only for SPL that we have two cases:
- SPL_BLK is enabled, in which case we use driver model and blk-uclass.c
- SPL_BLK is not enabled, in which case (if we need block devices) we must
use blk_legacy.c
Rename the symbol to SPL_LEGACY_BLOCK to make this clear. This is
different enough from BLK and SPL_BLK that there should be no confusion.
Signed-off-by: Simon Glass <sjg@chromium.org>
Disable UBI fastmap support which is not supported by original Maemo 5
kernel and explicitly set UBI BEB limit to 10%, which is the value used by
original Maemo 5 kernel. U-Boot default value is 20%.
Signed-off-by: Pali Rohár <pali@kernel.org>
UEFI:
Implement a command eficonfig to maintain Load Options and boot order via
menus.
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Merge tag 'efi-next-2022-09-14' of https://source.denx.de/u-boot/custodians/u-boot-efi into next
Pull request for efi next
UEFI:
Implement a command eficonfig to maintain Load Options and boot order via
menus.
The bootmenu enumerates the UEFI boot options
for boot device selection.
This commit adds the description how the UEFI boot work
in bootmenu. This commit also adds "Synopsis", "Description"
and "Configuration" sections to follow the U-Boot command
documentation format.
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Add documentation for the cyclic function infrastructure, including the
cyclic command.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Running tests in parallel is much faster, e.g. 15 seconds to run the tests
on sandbox (only), instead of 100 seconds (on a 16-core machine). Add a
'make pcheck' option to access this feature.
Note that the tools/ tests still run each tool's tests once after the
other, although within that, they do run in parallel. So for example,
the buildman tests run in parallel, then the binman tests run in
parallel. There would be a signiificant advantage to running them all
in parallel together, but that would require a large amount of
refactoring, e.g. with more use of pytest fixtures.
Update the documentation to represent the current state.
Signed-off-by: Simon Glass <sjg@chromium.org>
Documentation:
* man-page for tftpput
UEFI:
* fix driver binding protocol for block IO devices
* don't delete invalid handles
* add a unit test for the EFI Conformance Profile Table
Other:
* correct short text for tftpboot
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Merge tag 'efi-2022-10-rc5' of https://source.denx.de/u-boot/custodians/u-boot-efi
Pull request for efi-2022-10-rc5
Documentation:
* man-page for tftpput
UEFI:
* fix driver binding protocol for block IO devices
* don't delete invalid handles
* add a unit test for the EFI Conformance Profile Table
Other:
* correct short text for tftpboot
Provide a man-page for the tftpput command.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Some tests can have race conditions which are hard to detect on a single
one. Add a way to run tests more than once, to help with this.
Each individual test is run the requested number of times before moving
to the next test. If any runs failed, a message is shown.
This is most useful when running a single test, since running all tests
multiple times can take a while.
Signed-off-by: Simon Glass <sjg@chromium.org>
LTO (Link-Time Optimisation) is an very useful feature which can
significantly reduce the size of U-Boot binaries. So far it has been
made available for selected ARM boards and sandbox.
However, incremental builds are much slower when LTO is used. For example,
an incremental build of sandbox takes 2.1 seconds on my machine, but 6.7
seconds with LTO enabled.
Add a NO_LTO parameter to the build, similar to NO_SDL, so it can be
disabled during development if needed, for faster builds.
Add some documentation about LTO while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
This command is being introduced with the goal of allowing user-friendly
"generic use case" U-Boot builds to pause until user input under some
situations.
The main use case would be when a boot failure happens, to pause until
the user has had time to acknowledge the current state.
Tested using:
make && ./u-boot -v -T -c 'ut lib lib_test_hush_pause'
Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>
Add bindings needed for accessing the FWU metadata regions.
These include the compatible string which point to the access
method, the actual device which stores the FWU metadata and
the offsets for both metadata regions.
The current patch adds basic bindings needed for accessing the
metadata structure on non-GPT mtd regions.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
- Use gender-neutral language to refer to the user, consistently.
- Reference the checkpatch document.
- Move the section on commit message tags to the process document and
reference this in sending_patches.rst.
- Reword the custodian workflow process section to refer to this new
section, integrate some of the wording from there in this new section.
- Update the comment about GPLv2 applying to August 2022, to be clear
this still is correct.
- Reword the section about MAKEALL to talk about local build testing and
link to the CI document.
- Reference the system_configuration document for the note about
modifying existing code.
- Reword the patchwork flow section.
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Import as-is much of the old "Patches" wiki page to the current
sending_patches.rst file. This means we need to move patman to being
included in the higher level ToC and add a reference for "Custodians" in
the process document. A very minimal amount of content changing and
rewording is done here as part of the import, in order to make the
conversion easier.
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add gpio status output fields description and one output example.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tweak the formatting.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
With the addition of the revision stats this now takes over a minute. Use
a parallel build to reduce it a bit (24 seconds for me).
Series-changes; 2
- Use '-j auto' instead
Signed-off-by: Simon Glass <sjg@chromium.org>
Since both pm8916.c and pm8916_gpio.c are already supporting multiple
Qcom SoCs, it makes sense to rename these drivers to pmic_qcom.c and
qcom_pmic_gpio.c respectively. Also, these driver can be extended to
support additional functionality if required for other Qcom SoCs.
Along with this import latest DT binding: qcom,spmi-pmic.txt from Linux
kernel and thereby remove pm8916.txt.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
These boards have been orphaned for some time and are behind on various
DM migrations. Remove them.
Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Explain when devices should get activated.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
The ELF U-Boot image produced by qemu-riscv64_smode_defconfig can be
used to boot with QEMU and KVM.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This is an attempt to answer the comments provided by Xavier [1].
[1] https://lore.kernel.org/all/Yulcol7HpTHtjXTX@begut/
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Link to patman's documentation from the doc/ directory so that it appears
in the 'make htmldocs' output.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This was widely used by U-Boot for a long time, but is not used anymore,
with Gitlab and Azure taking over.
Drop the text.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
We talk about importing code from other projects in two places. The
first place is in the coding style section, where we explain when to or
not to deviate in terms of white space, etc. In the process
documentation we now add a note about saying where the code was imported
from and to ensure that you do not copy Signed-off-by or other tags.
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
* describe crashs in UEFI binaries
* provide architechture specific information for the sandbox and RISC-V
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
These typos were found while reading the docs.
Signed-off-by: Paul Barker <paul.barker@sancloud.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Remove alias 'efi' with invalid data.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add some documentation and a new flag so that we can safely enabled using
the ofnode interface to write to the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present ofnode only works with a single device tree, for the most part.
This is the control FDT used by U-Boot.
When booting an OS we may obtain a different device tree and want to
modify it. Add some initial support for this into the ofnode API.
Note that we don't permit aliases in this other device tree, since the
of_access implementation maintains a list of aliases collected at
start-up. Also, we don't need aliases to do fixups in the other FDT. So
make sure that flat tree and live tree processing are consistent in this
area.
Signed-off-by: Simon Glass <sjg@chromium.org>
The unflattening algorithm results in a single block of memory being
allocated for the whole tree. When writing new properties, these are
allocated new memory outside that block. When the block is freed, the
allocated properties remain.
Document how this works and the potential memory leak, as well as
mentioning that updating the livetree is actually supported now.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a few links to documents about Verified Boot for Embedded (VBE).
These will be expanded as development proceeds.
Signed-off-by: Simon Glass <sjg@chromium.org>
This is not needed now that CONFIG_SYS_TARGET_NAME is correctly determined
when scanning Kconfig.
This reverts commit 25b8acee2e.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
There are a large number of options under CONFIG_SYS (but some of these
are elsewhere, spotted while cleaning CONFIG_SYS) that are never
referenced, or only used slightly later in the config file. Remove or
restructure these.
Signed-off-by: Tom Rini <trini@konsulko.com>
Start by describing in general the best practices for how to implement
configuration of some aspect of U-Boot. This generally means finding
the right choices for when something should be static or dynamically
configured and enabled. Then further document when to use CONFIG or CFG
namespaces for static configuration.
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
