coreboot for the Switch
Find a file
Kyösti Mälkki 5413dfd0f4 UPSTREAM: AGESA: Fix UMA calculations
Vendorcode decides already in AMD_INIT_POST the exact location
of UMA memory. To meet alignment requirements, it will extend
uma_memory_size. We cannot calculate base from size and TOP_MEM1,
but need to calculate size from base and TOP_MEM1 instead.

Also allows selection of UmaMode==UMA_SPECIFIED to manually set
amount of memory reserved for framebuffer.

BUG=none
BRANCH=none
TEST=none

Change-Id: Ie72f645e841d758ad4a275c39111c3a785ddd883
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 61be3603f4
Original-Change-Id: I2514c70a331c7fbf0056f22bf64f19c9374754c0
Original-Signed-off-by: Kysti Mlkki <kyosti.malkki@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/19328
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/508778
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
2017-05-18 18:07:13 -07:00
configs UPSTREAM: configs/builder: Remove pre-defined VGA bios file 2017-01-22 05:03:18 -08:00
Documentation UPSTREAM: Documentation/Intel: Add vboot documentation 2017-05-06 19:52:17 -07:00
payloads UPSTREAM: cbgfx: Add portrait screen support 2017-05-02 20:24:10 -07:00
src UPSTREAM: AGESA: Fix UMA calculations 2017-05-18 18:07:13 -07:00
util UPSTREAM: util/release: Update build-release script 2017-05-16 10:41:45 -07:00
.checkpatch.conf Drop --exclude statement from .checkpatch.conf 2017-03-13 17:53:59 -07:00
.clang-format Provide coreboot coding style formalisation file for clang-format 2015-11-10 00:49:03 +01:00
.gitignore UPSTREAM: .gitignore: ignore blobtool binary 2017-05-15 08:17:54 -07:00
.gitmodules Make upstream tree CrOS SDK friendly 2016-05-12 15:42:17 -06:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COMMIT-QUEUE.ini DO NOT UPSTREAM: COMMIT-QUEUE: add peppy-pre-cq for more coverage. 2017-04-26 19:46:58 -07:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
gnat.adc UPSTREAM: gnat.adc: Do not generate assertion code for Refined_Post 2016-11-03 14:44:05 -07:00
MAINTAINERS UPSTREAM: MAINTAINERS: Update list 2017-03-08 05:13:03 -08:00
Makefile UPSTREAM: build system: when cleaning the tree, remove ..config.tmp* 2017-04-28 22:25:31 -07:00
Makefile.inc UPSTREAM: device: allow devicetree accesses in postcar stage 2017-04-26 13:36:56 -07:00
PRESUBMIT.cfg Make upstream tree CrOS SDK friendly 2016-05-12 15:42:17 -06:00
README UPSTREAM: Remove extra newlines from the end of all coreboot files. 2016-08-04 23:36:56 -07:00
toolchain.inc UPSTREAM: Remove libverstage as separate library and source file class 2017-03-29 13:43:09 -07:00

-------------------------------------------------------------------------------
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
------------------

 * make
 * gcc / g++
   Because Linux distribution compilers tend to use lots of patches. coreboot
   does lots of "unusual" things in its build system, some of which break due
   to those patches, sometimes by gcc aborting, sometimes - and that's worse -
   by generating broken object code.
   Two options: use our toolchain (eg. make crosstools-i386) or enable the
   ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this
   case).
 * iasl (for targets with ACPI support)

Optional:

 * doxygen (for generating/viewing documentation)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig' and 'make nconfig')
 * 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.