Go to file
Furquan Shaikh 25fbe2ad82 t210: Apply A57 hardware issue workaround during cpu startup
Define custom stage_entry to apply workaround for A57 hardware issue
for power on reset. It is observed that BTB contains stale data after
power on reset. This could lead to unexpected branching and crashes at
random intervals during the boot flow. Thus, invalidate the BTB
immediately after power on reset.

BUG=chrome-os-partner:41877
BRANCH=None
TEST=Compiles successfully and reboot test does not crash in firmware
for 10K iterations.

Change-Id: Ifbc9667bc5556112374f35733192b67b64a345d2
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: bc7c2fec3c6b29e291235669ba9f22ff611064a7
Original-Change-Id: I1f5714074afdfee64b88cea8a394936ca848634b
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/284869
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/10899
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-07-13 10:01:58 +02:00
3rdparty vboot: Don't count boot attempts if lid is closed 2015-07-08 19:40:24 +02:00
Documentation Remove empty lines at end of file 2015-06-08 00:55:07 +02:00
payloads libpayload: Fix arithmetic precedence in div_round_up() 2015-07-13 09:19:42 +02:00
src t210: Apply A57 hardware issue workaround during cpu startup 2015-07-13 10:01:58 +02:00
util Update crossgcc Makefile for new buildgcc arguments 2015-07-12 19:04:14 +02:00
.gitignore gitignore: Have multiple crossgcc versions 2015-05-25 21:26:02 +02:00
.gitmodules submodules: add arm-trusted-firmware third-party repository 2015-06-23 08:20:24 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
MAINTAINERS MAINTAINERS: grab build system responsibility 2015-05-22 22:47:03 +02:00
Makefile Makefile: Use variables defined for Kconfig 2015-06-30 18:53:54 +02:00
Makefile.inc Makefile.inc: Add math macros 2015-07-11 22:11:29 +02:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00
toolchain.inc build system / amd64: Avoid GCC taking the ABI spec too literally 2015-07-08 19:38:35 +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.