Go to file
Gabe Black f220df6ff9 nyan: Use asm volatile instead of plain asm so it doesn't get optimized out.
If an asm blob isn't marked as volatile, gcc is free to throw it out if it
doesn't think it produces any values that are actually used. To prevent that
from happening, add volatile to some asm blobs in the nyan romstage code.

BUG=None
TEST=Booted on nyan rev1.
BRANCH=None

Original-Change-Id: I819e068e738e94ea749fcb72bba2eee080e1dfb1
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/185610
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 76c09581d6ca4dc6c2f9048f599822939f439d11)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I0b32197abf0ddc5f454f9c2415a65d98c60ca48b
Reviewed-on: http://review.coreboot.org/7396
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
2014-11-12 02:25:06 +01:00
3rdparty@27bdb5e8a6 blobs: Update to IPQ blob commit 2014-11-11 23:15:41 +01:00
documentation mkelfimage: remove 2014-10-08 14:27:24 +02:00
payloads arm: Redesign, clarify and clean up cache related code 2014-11-10 21:34:49 +01:00
src nyan: Use asm volatile instead of plain asm so it doesn't get optimized out. 2014-11-12 02:25:06 +01:00
util abuild: pass compiler configuration options to tool building step 2014-11-09 22:46:47 +01:00
.gitignore .gitignore: add 3 executables that can be built in util/ 2014-08-11 06:26:01 +02:00
.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: Add ccopts back into the build 2014-11-09 01:36:43 +01:00
Makefile.inc build: Add ccopts back into the build 2014-11-09 01:36:43 +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 build: Add ccopts back into the build 2014-11-09 01:36:43 +01:00

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.