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Icarus Chau d5f551a82a broadcom/cygnus: Initialize dram in romstage.
BUG=chrome-os-partner:36456
BRANCH=broadcom-firmware
TEST=When enable configuration CYGNUS_SDRAM_TEST_DDR,
print on console:

sdram initialization is completed.
test ddr start from 0x60000000 to 0x80000000
...
test ddr end: fail=0
Translation table is @ 02004000
Mapping address range [0x00000000:0x00000000) as uncached

Change-Id: I88dc2f0c504e2a152133edd442c3d776dd73d37e
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 376471751d6980f99bbe47faad193c79a05fa69f
Original-Signed-off-by: Icarus Chau <ichau@broadcom.com>
Original-Reviewed-on: https://chrome-internal-review.googlesource.com/199775
Original-Commit-Queue: <ichau@broadcom.com>
Original-Tested-by: <ichau@broadcom.com>
Original-Reviewed-by: Scott Branden <sbranden@broadcom.com>
Original-Change-Id: I47bc5d9ec147cc8bfbd893e8c0d7e5fc5e401771
Original-Reviewed-on: https://chromium-review.googlesource.com/256416
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: http://review.coreboot.org/9853
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-04-22 08:40:04 +02:00
3rdparty@892a6976ba 3rdparty: move checkout marker forward 2015-04-14 01:09:51 +02:00
documentation documentation: define downstream data consumption rules 2015-04-07 00:20:13 +02:00
payloads libpayload: add timer driver for cygnus 2015-04-21 08:29:10 +02:00
src broadcom/cygnus: Initialize dram in romstage. 2015-04-22 08:40:04 +02:00
util cbfstool: clean up source code 2015-04-18 08:50:38 +02:00
.gitignore .gitignore: add the doxygen directory. 2014-12-14 23:30:45 +01:00
.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 Makefile: Fix dependency tracking for ramstage objects 2015-04-17 09:55:31 +02:00
Makefile.inc build system: improve portability by not relying on extraordinary dd options 2015-04-20 19:49:36 +02:00
README
toolchain.inc ARM: Remove -mno-unaligned-access 2015-04-17 09:21:16 +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.