9159e1c527
RaptorLake introduces the support of the Voltage Regulator Fast Vmode
feature. When enabled, it makes the SoC throttle when the current
exceeds the I_TRIP threshold. This threshold should be between
Iccmax.app and Iccmax and take into account the specification of the
Voltage Regulator of the system.
This change provides a mean to:
1. Enable the feature via the `vr_config->enable_fast_vmode'. If no
I_TRIP value is supplied FSPs picks an adapted I_TRIP value for
the current SoC assuming a Voltage Regulator error accuracy of
6.5%.
2. Set the I_TRIP threshold via the `vr_config->fast_vmode_i_trip'
field.
These new fields are considered independent from the other `vr_config'
fields so that the board configuration does not have to unnecessarily
supply other VR settings to enable Fast VMode.
Information about the Fast VMode Feature can be found in the following
Intel documents:
- 627270 ADL and RPL Processor Family Core and Uncore BIOS
Specification
- 724220 RaptorLake Platform Fast V-Mode
- 686872 RaptorLake Lake U P H Platform
BUG=b:243120082
BRANCH=firmware-brya-14505.B
TEST=Read I_TRIP from the Pcode and verify consistency with
a few `enable_fast_vmode' and `fast_vmode_i_trip' settings.
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Change-Id: I313acf01c534d0d32620a9dedba7cf3b304ed2ee
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66917
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
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| 3rdparty | ||
| Documentation | ||
| LICENSES | ||
| configs | ||
| payloads | ||
| spd | ||
| src | ||
| tests | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| .mailmap | ||
| AUTHORS | ||
| COPYING | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc | ||
| README.md | ||
| gnat.adc | ||
| toolchain.inc | ||
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_TOOLCHAINKconfig option if you're feeling lucky (no support in this case). - iasl (for targets with ACPI support)
- pkg-config
- libssl-dev (openssl)
Optional:
- gdb (for better debugging facilities on some targets)
- ncurses (for
make menuconfigandmake 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:
You can contact us directly on the coreboot mailing list:
https://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.