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Aaron Durbin 7538937d6e rambi: export SPI write-protect GPIO correctly
Bay Trail has 3 banks of gpios. Therefore, in order to
properly identify a gpio the specific bank number as well
as the GPIO within that bank is needed. The SPI
write-protect GPIO is GPIO 6 within the SUS bank (offset
0x2000).

BUG=chrome-os-partner:24324
BUG=chrome-os-partner:24408
BRANCH=None
TEST=Built and booted. Looked at GPIO sysfs in the
     chromeos_acpi directory.

Change-Id: Ic51b5abe3bacf6cf9b6a90cf666f1a63b098a0e3
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/179195
Reviewed-on: http://review.coreboot.org/4995
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins)
2014-05-09 05:41:29 +02:00
3rdparty@324ec3cb64 3rdparty: update to current HEAD 2014-01-11 10:57:34 +01:00
documentation Drop drivers/generic/debug 2014-04-22 13:42:48 +02:00
payloads libpayload/endian.h: Provide alignment-agnostic enc/dec bytestreams. 2014-04-26 15:03:43 +02:00
src rambi: export SPI write-protect GPIO correctly 2014-05-09 05:41:29 +02:00
util kconfig: update to follow upstream more closely 2014-05-07 19:39:28 +02:00
.gitignore git-ignore site-local 2014-04-01 08:55:02 +02:00
.gitmodules gitmodules: Fix 3rdparty updates 2013-06-28 00:56:43 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
Makefile kconfig: update to follow upstream more closely 2014-05-07 19:39:28 +02:00
Makefile.inc Introduce stage-specific architecture for coreboot 2014-05-06 20:23:31 +02:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc toolchain: get rid of some bashisms 2014-05-09 05:38:51 +02:00

README

-------------------------------------------------------------------------------
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.