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Julius Werner 12de698c24 arm: Import armv7_dcache_wbinv_all function from NetBSD
This patch pulls in NetBSD's full cache flushing algorithm for ARM, to
replace our old, slow and slightly overzealous C-only implementation.
It's a beautiful piece of code that manages to run on only caller-saved
registers (meaning it doesn't need to write to memory) in a very tight
loop, and it's BSD-licensed to boot (which we need for libpayload).
Unfortunately it's also not quite correct, but I can fix that. Pulling
the original in a separate commit to make it more obvious what changes
are mine.

Change-Id: I7a71c9e570866a6e25f756cb09ae2b6445048d83
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/183878
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 4698467320613d7ddc39714f40aacbc990af9399)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6931
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
2014-09-29 17:26:22 +02:00
3rdparty@f37e0e64ac AMD Steppe Eagle: Update reference to BLOBs repo (3rdparty) 2014-09-01 00:37:16 +02:00
documentation Documentation: Use correct file name for the build guide in the Makefile 2014-07-04 19:03:10 +02:00
payloads libpayload: Add missing cache API stub to x86 2014-09-25 18:33:07 +02:00
src arm: Import armv7_dcache_wbinv_all function from NetBSD 2014-09-29 17:26:22 +02:00
util cbfstool: Propogate compression errors back to the caller. 2014-09-25 20:26:04 +02:00
.gitignore .gitignore: add 3 executables that can be built in util/ 2014-08-11 06:26:01 +02:00
.gitmodules nvidia-cbootimage: add submodule 2014-09-08 18:58:40 +02:00
.gitreview
COPYING
Makefile ARM: Generalize armv7 as arm. 2014-09-08 18:59:23 +02:00
Makefile.inc coreboot arm64: Add support for arm64 into coreboot framework 2014-09-23 18:10:32 +02:00
README
toolchain.inc coreboot arm64: Add support for arm64 into coreboot framework 2014-09-23 18:10:32 +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.