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David Hendricks c94702481b elog: Probe for SPI flash on bus indicated by Kconfig variable
This replaces a hard-coded bus number of 0 with a Kconfig variable,
CONFIG_BOOT_MEDIA_SPI_BUS. This removes an assumption made for x86
where this value is always 0 and makes it easy to add support for
other platforms where the bus number for the backing SPI flash is
more arbitrary.

BUG=none
BRANCH=none
TEST=tested on Nyan (bus=4) and Link (bus=0)
Signed-off-by: David Hendricks <dhendrix@chromium.org>

Original-Change-Id: I1e878a1628af7f4ccc2f39a70b2190192767e536
Original-Reviewed-on: https://chromium-review.googlesource.com/194854
Original-Tested-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 371c6c14d8d4b98004eebce7049a88a219682bc4)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ie105b4654e028098f2137c96e4309b8d85f096df
Reviewed-on: http://review.coreboot.org/7753
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2014-12-15 23:58:34 +01:00
3rdparty@9f68e20e5e 3rdparty: Update to latest commit in blobs repository 2014-12-01 08:50:32 +01:00
documentation mkelfimage: remove 2014-10-08 14:27:24 +02:00
payloads arm: Fix minor mistake in cache maintenance assembly 2014-12-15 23:27:41 +01:00
src elog: Probe for SPI flash on bus indicated by Kconfig variable 2014-12-15 23:58:34 +01:00
util buildgcc: Fix msys2 crossgcc build fail 2014-12-15 16:49:42 +01:00
.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 Makefile: Tone down some clang warnings, some are unproductive 2014-12-12 13:29:47 +01:00
Makefile.inc build system: fix alignment function 2014-12-03 15:50:28 +01:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc Add UCB RISCV support for architecture, soc, and emulation mainboard.. 2014-12-01 19:06:43 +01:00

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