coreboot for the Switch
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Lin Huang c135ea3e33 rockchip: rk3399: set W2W_DIFFCS_DLY to 5
It will enable PHY_PER_CS_TRAINING when DDR  DDR frequency >= 666.
For per cs training, the controller should consider the PHY delay
line switch time,there should be more cycles to switch delay line.
So need  increase W2W_DIFFCS_DLY_ value from 0x1 to 0x5.

BRANCH=none
BUG=chrome-os-partner:56940
TEST=do memtester on kevin board, and pass

Change-Id: I81b99cbc085769b7028e770509d79bd8d550820b
Signed-off-by: Lin Huang <hl@rock-chips.com>
Reviewed-on: https://chromium-review.googlesource.com/387506
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
2016-09-22 02:52:56 -07:00
Documentation UPSTREAM: Documentation: add start of documentation of the build system 2016-08-15 07:36:05 -07:00
payloads UPSTREAM: SeaBIOS: Update stable version to 1.9.3 2016-09-15 13:40:55 -07:00
src rockchip: rk3399: set W2W_DIFFCS_DLY to 5 2016-09-22 02:52:56 -07:00
util UPSTREAM: Add minimal GNAT run time system (RTS) 2016-09-21 19:36:46 -07:00
.checkpatch.conf UPSTREAM: Update .checkpatch.conf 2016-09-06 13:26:39 -07:00
.clang-format Provide coreboot coding style formalisation file for clang-format 2015-11-10 00:49:03 +01:00
.gitignore UPSTREAM: .gitignore: Add coreinfo build residue, defconfig 2016-09-06 13:26:36 -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 Make upstream tree CrOS SDK friendly 2016-05-12 15:42:17 -06:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
gnat.adc UPSTREAM: Make Ada a first class citizen 2016-09-21 19:36:43 -07:00
MAINTAINERS UPSTREAM: MAINTAINERS: Add myself as tpm support maintainer. 2016-07-07 19:29:05 -07:00
Makefile UPSTREAM: Add minimal GNAT run time system (RTS) 2016-09-21 19:36:46 -07:00
Makefile.inc UPSTREAM: Add minimal GNAT run time system (RTS) 2016-09-21 19:36:46 -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: Add minimal GNAT run time system (RTS) 2016-09-21 19:36:46 -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.