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Duncan Laurie bf5407cd49 chromeec: Clear post code before reboot to RO
When doing an EC requested reboot to RO mode clear the
saved post code in order to prevent confusing events in
the log where the system is rebooted intentionally.

BUG=chrome-os-partner:28234
BRANCH=none
TEST=build and boot on samus, run FAFT, check for odd
eventlog entries about last post code 0x31 when it is
rebooted during samus romstage entry point.

Original-Change-Id: I8bedc611712424bf1044cdca1972e34ffdd51abd
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/215681
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit e32d7a7e54e7006b84509dbc2bfe9b4b022eba71)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Iad816669fb4054260f995f6f0bfb140121aaddff
Reviewed-on: http://review.coreboot.org/9176
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@google.com>
2015-03-31 20:21:43 +02:00
3rdparty@2bc495fd31 3rdparty: Update submodule to get Tegra 132 binaries 2015-03-07 17:50:58 +01:00
documentation documentation: begin documenting our use of git submodules 2015-02-13 09:33:24 +01:00
payloads libpayload: usb: xhci: set ENT flag in last Normal TRB 2015-03-23 18:41:18 +01:00
src chromeec: Clear post code before reboot to RO 2015-03-31 20:21:43 +02:00
util cbfstool: add filetypes for FSP, MRC, SPC and MRC_CACHE 2015-03-30 21:45:11 +02:00
.gitignore .gitignore: add the doxygen directory. 2014-12-14 23:30:45 +01:00
.gitmodules nvidia/cbootimage: avoid upstream's build system 2014-10-02 10:26:58 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING
Makefile build system: generalize src-to-obj 2015-03-30 20:41:17 +02:00
Makefile.inc x86/smm: Move SMM configuration out of generic Makefile 2015-03-30 20:41:15 +02:00
README
toolchain.inc mips: mips, not mipsel 2015-03-29 22:38:57 +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.