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Julius Werner f36d53c653 device_tree: Drop sub-node path lookup from dt_find_node_by_path() 
Besides looking up a node with an absolute path dt_find_node_by_path()
currently also supports finding a sub-node of a non-root node. All
callers of the function pass the root node though, so it seems there
is no real need for this functionality. Also it is planned to support
DT path names with aliases, which would become messy in combination with
the lookup from a sub-node.

Change the interface of dt_find_node_by_path() to receive the DT tree
object instead of a parent node and adapt all callers accordingly.

This patch was adapted from depthcharge's http://crosreview.com/1252769

Change-Id: Iff56be4da2461ae73a7301dcaa315758d2a8c999
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32864
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
 		2019-06-04 11:23:12 +00:00
3rdparty 3rdparty: Uprev vboot submodule to upstream master 2019-05-13 09:32:04 +00:00
Documentation vendorcode/eltan: Add vendor code for measured and verified boot 2019-06-04 10:41:53 +00:00
configs mb/lenovo/*: Add support for VBOOT on 8MiB devices 2019-05-08 10:31:23 +00:00
payloads libpayload/i8042/keyboard: Fix return value check for keyboard_cmd 2019-06-04 11:20:05 +00:00
src device_tree: Drop sub-node path lookup from dt_find_node_by_path() 2019-06-04 11:23:12 +00:00
util qcs405: util/qualcomm: Add T32 debug scripts 2019-06-03 13:20:38 +00:00
.checkpatch.conf
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.clang-format Revert "lint/clang-format: set to 96 chars per line" 2019-03-15 23:05:06 +00:00
.gitignore util/bucts: Add tool to manipulate BUC.TS bit on Intel targets 2018-11-19 08:19:16 +00:00
.gitmodules 3rdparty/opensbi: Add submodule 2019-04-24 08:46:25 +00:00
.gitreview
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COPYING
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MAINTAINERS MAINTAINERS: Update Braswell SoC maintainers 2019-03-06 20:05:11 +00:00
Makefile Hook up Kconfig Ada spec file 2019-02-06 16:20:35 +00:00
Makefile.inc Makefile.inc: Extend version string for timeless builds 2019-05-29 20:09:24 +00:00
README.md README: Convert to Markdown 2018-09-16 13:01:58 +00:00
gnat.adc
…
toolchain.inc arch/power8: Rename to ppc64 2018-11-30 20:02:17 +00:00

README.md

coreboot README

coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.

With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.

coreboot was formerly known as LinuxBIOS.

Payloads

After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.

See https://www.coreboot.org/Payloads for a list of supported payloads.

Supported Hardware

coreboot supports a wide range of chipsets, devices, and mainboards.

For details please consult:

Build Requirements

  • make
  • gcc / g++ Because Linux distribution compilers tend to use lots of patches. coreboot does lots of "unusual" things in its build system, some of which break due to those patches, sometimes by gcc aborting, sometimes - and that's worse - by generating broken object code. Two options: use our toolchain (eg. make crosstools-i386) or enable the ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).
  • iasl (for targets with ACPI support)
  • pkg-config
  • libssl-dev (openssl)

Optional:

  • doxygen (for generating/viewing documentation)
  • gdb (for better debugging facilities on some targets)
  • ncurses (for make menuconfig and make nconfig)
  • flex and bison (for regenerating parsers)

Building coreboot

Please consult https://www.coreboot.org/Build_HOWTO for details.

Testing coreboot Without Modifying Your Hardware

If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.

Please see https://www.coreboot.org/QEMU for details.

Website and Mailing List

Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:

https://www.coreboot.org

You can contact us directly on the coreboot mailing list:

https://www.coreboot.org/Mailinglist

Copyright and License

The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details.

coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details.

This makes the resulting coreboot images licensed under the GPL, version 2.