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Julius Werner 3e64e28f68 cbmem: Add support for new 'coreboot' compatible device tree binding
This patch brings the cbmem utility in line with the recent change to
coreboot's device tree binding. Since trying to find the right node to
place this binding has been so hard (and still isn't quite agreed upon),
and because it's really the more correct thing to do, this code searches
through the device tree for the 'coreboot' compatible property instead
of looking up a hardcoded path. It also provides bullet-proof
'#address-cells' handling that should work for any endianness and size.

BUG=chrome-os-partner:29311
TEST=Ran cbmem -c and cbmem -t on Nyan_Big. Also straced the to make
sure everything looks as expected. 'time cbmem -t' = ~35ms shows that
there is no serious performance problem from the more thorough lookup
code.

Change-Id: I806a21270ba6cec6e81232075749016eaf18508b
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/204274
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
2014-06-18 01:36:11 +00:00
configs coreboot rush: Add config for serial console 2014-06-11 00:09:41 +00:00
documentation sconfig: rename lapic_cluster -> cpu_cluster 2013-02-14 07:07:20 +01:00
payloads libpayload: Introduce new Kconfig to explicitly allow GPL code 2014-06-13 20:37:29 +00:00
src smbios: Allow custom Type3 entry 2014-06-13 22:43:24 +00:00
util cbmem: Add support for new 'coreboot' compatible device tree binding 2014-06-18 01:36:11 +00:00
.gitignore rmodules: add support for rmodtool 2014-03-31 22:25:57 +00:00
COMMIT-QUEUE.ini COMMIT-QUEUE.ini: Add documentation. 2013-11-01 14:08:42 +00:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
Makefile coreboot: Introduce stage-specific architecture for coreboot 2014-05-09 04:41:47 +00:00
Makefile.inc coreboot arm64: Add support for arm64 into coreboot framework 2014-05-15 23:52:58 +00:00
PRESUBMIT.cfg chromeos: Add PRESUBMIT.cfg 2013-05-01 14:31:10 -07:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc coreboot arm64: Add support for arm64 into coreboot framework 2014-05-15 23:52:58 +00:00

-------------------------------------------------------------------------------
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 http://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:

 * http://www.coreboot.org/Supported_Motherboards
 * http://www.coreboot.org/Supported_Chipsets_and_Devices


Build Requirements
------------------

 * gcc / g++
 * make

Optional:

 * doxygen (for generating/viewing documentation)
 * iasl (for targets with ACPI support)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig')
 * flex and bison (for regenerating parsers)


Building coreboot
-----------------

Please consult http://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 http://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:

  http://www.coreboot.org

You can contact us directly on the coreboot mailing list:

  http://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.