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Teddy Shih 369b9ad787 mb/google/dedede/var/beadrix: Update PCIe and SATA pins for low power consumption
To achieve low power consumption, we disable unused PCIe and SATA
pins at beadrix/overridetree.cb according to baseboard/devicetree.cb
and mainboard schematic. Original measured beadrix board's power
consumption is about 250 mW. After we disable unused PCIe and SATA
pins, as well as, enable the other low power MUX CL (3487086: USB
MUX: Update low power mode of MUX anx7447 used as MUX only |
https://chromium-review.googlesource.com/c/chromiumos/platform/ec/
+/3487086), the measured power consumption achieves about 110 ~ 116
mW, as well as, meets Google battery life for 14 days in the suspend
state and Intel low power consumption about 116 mW.

BRANCH=dedede
BUG=b:204882915
TEST=on beadrix, measured power consumption meets Intel power
consumption.

Signed-off-by: Teddy Shih <teddyshih@ami.corp-partner.google.com>
Change-Id: I79ec524c5ce8f2a79da4aeba084786fb9dac17af
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62776
Reviewed-by: Teddy Shih <teddyshihau@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Super Ni <super.ni@intel.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Ivan Chen <yulunchen@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2022-04-07 15:31:57 +00:00
3rdparty Update blobs submodule to upstream master 2022-03-24 17:20:58 +00:00
Documentation mb/starlabs/lite: Add Lite Mk IV variant 2022-04-04 21:54:24 +00:00
LICENSES treewide: Remove trailing whitespace 2021-02-17 17:30:05 +00:00
configs src/mainboard/emulation/qemu-power9/*: add QEMU POWER9 mainboard 2022-02-11 20:14:55 +00:00
payloads commonlib/bsd/helpers: Remove redundancy with libpayload defines 2022-03-30 21:21:47 +00:00
spd spd/lp5: Add new part MT62F2G32D8DR-031 2022-03-10 15:16:52 +00:00
src mb/google/dedede/var/beadrix: Update PCIe and SATA pins for low power consumption 2022-04-07 15:31:57 +00:00
tests tests/lib: Add space before single line comment termination 2022-03-27 15:33:39 +00:00
util superiotool/ite: add IT8625E EC registers 2022-04-06 16:28:53 +00:00
.checkpatch.conf lint: checkpatch: Only exclude specific src/vendorcode/ subdirectories 2021-04-06 16:04:41 +00:00
.clang-format
.editorconfig
.gitignore .gitignore: Ignore .test/.dependencies globally 2020-10-31 18:21:36 +00:00
.gitmodules .gitmodules: Update intel-microcode submodule to track branch=main 2021-06-09 17:20:50 +00:00
.gitreview
.mailmap .mailmap: Add a .mailmap file for git 2022-03-08 18:53:47 +00:00
AUTHORS AUTHORS, util/: Drop individual copyright notices 2020-05-09 21:21:32 +00:00
COPYING
MAINTAINERS MAINTAINERS: Remove myself 2022-03-14 15:53:10 +00:00
Makefile Makefile: Clean up old targets 2022-03-31 17:37:59 +00:00
Makefile.inc crossgcc: Upgrade IASL from 20211217 to 20220331 2022-04-04 13:54:49 +00:00
README.md README.md: Remove link to deprecated wiki 2019-11-16 20:39:55 +00:00
gnat.adc treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
toolchain.inc build system: immediately report what users are supposed to look into 2021-10-18 16:39:25 +00:00

README.md

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 https://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:

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)
  • pkg-config
  • libssl-dev (openssl)

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 https://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 https://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:

https://www.coreboot.org

You can contact us directly on the coreboot mailing list:

https://www.coreboot.org/Mailinglist

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.