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Paul Menzel 5218e61651 intel/lynxpoint: Allow building without IFD (descripter.bin)
On newer Intel systems, like Intel Lynx Point, the flash ROM is shared
between the host processor (BIOS), its Management Engine (ME) and an
integrated Ethernet controller (GbE). The layout of the flash ROM (and
other information) is kept in the so called Intel Firmware Descriptor
(IFD).  If we only want to build coreboot to update the BIOS section,
all we need is the flash layout.

So add the option to specify the flash layout in the mainboard’s
Kconfig, and thus, to build without the real IFD. However, with such a
build, one has to make sure that the IFD section on the flash ROM will
not be written over (nor any other section that has not been included
by coreboot). A patch to write selected sections of a flash ROM with
IFD has been sent to the flashrom mailing list [2].

The same was done in commit a15cd66b [1] (sandybridge: Make build
possible without descriptor.bin) for Intel Sandy Bridge (BD82x6x).

[1] http://www.flashrom.org/pipermail/flashrom/2013-June/011083.html
    [PATCH] Add option to read ROM layout from IFD
[2] http://review.coreboot.org/3524

Change-Id: I26a604446cdf37a6bbcee2b14a107b7ccf417d5c
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/6046
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
2014-07-04 17:48:40 +02:00
3rdparty@45f0c04fd7 acpigen: Add acpigen_emit_eisaid. 2014-06-01 01:24:53 +02:00
documentation Drop drivers/generic/debug 2014-04-22 13:42:48 +02:00
payloads payloads/external/SeaBIOS: Upgrade stable from 1.7.2.1 to 1.7.4 2014-05-28 22:41:59 +02:00
src intel/lynxpoint: Allow building without IFD (descripter.bin) 2014-07-04 17:48:40 +02:00
util utils/cbfstool: No need to pass -g flag twice 2014-06-29 04:16:49 +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
Makefile Makefile: HOSTCC set too late in clang builds 2014-06-29 19:17:49 +02:00
Makefile.inc Makefile.inc: Detect if a working clang binary exists before set 2014-06-30 06:31:27 +02:00
README
toolchain.inc build: remove -ccopts mechanism 2014-06-29 09:22:13 +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.