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Julius Werner df295d0432 nyan/rush/veyron: Align ChromeOS GPIOs to new model
This CL makes slight changes to the ChromeOS-specific GPIO definitions
of Tegra and Rockchip boards to prepare them for new features in
depthcharge. It adds descriptions for the EC in RW and reset GPIOs,
changes the value Tegra writes into the (previously unused) 'port' field
to describe the complete GPIO information, and removes code to sample
some GPIOs that don't need to be sampled at coreboot time (to help
depthcharge detect errors and avoid using a stale value for something
that should always represent the current state).

BRANCH=None
BUG=None
TEST=None (tested together with depthcharge patches)

Change-Id: I36bb16c8d931f862bf12a5b862b10cf18d738ddd
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/231222
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2014-12-02 21:11:40 +00:00
configs urara: Modify config to match hardware and depthcharge 2014-12-02 03:51:22 +00:00
documentation documentation: Add documentation for timestamp library 2014-11-14 23:57:04 +00:00
payloads libpayload: UTF-16LE to ASCII conversion 2014-11-25 03:47:18 +00:00
src nyan/rush/veyron: Align ChromeOS GPIOs to new model 2014-12-02 21:11:40 +00:00
util ARM64 rmodule: Add new reloc type R_AARCH64_LDST8_ABS_LO12_NC 2014-11-27 02:01:29 +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 Makefile: Change $(generic-deps) to order-only prerequisite 2014-10-04 03:10:51 +00:00
Makefile.inc UPSTREAM:Add Kconfig options for Linux as payload 2014-10-29 22:24:00 +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 arch/mips: Add base MIPS architecture support 2014-09-01 11:05:57 +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.