| commit | c354f31b30f9b197a3f2ddf2d5f130fa5607fe53 | [log] [tgz] |
|---|---|---|
| author | Michał Żygowski <michal.zygowski@3mdeb.com> | Fri Apr 15 18:19:19 2022 +0200 |
| committer | Michał Żygowski <michal.zygowski@3mdeb.com> | Mon Jul 11 08:53:47 2022 +0000 |
| tree | 267396522e0d9528dcacaaabf3b4455ea8bef073 | |
| parent | c2d1588623b0196b86c25f700d6d0c39cd550be2 [diff] |
mb/msi/ms7d25: Configure PCIe Root Ports Add the full PCIe root port configuration. Proper initialization of the root ports depends on the correct GPIO programming including virtual wires. Do not program the CLKREQ signals in coreboot to let FSP detect and configure CLKREQ pads. Otherwise the CLKREQ pads are reprogrammed by FSP despite having GpioOverride=1. The pads that should not be touched by coreboot are left commented in the board GPIO file. CLKREQ reprogramming caused undefined behavior when ASPM and Clock PM was being enabled by coreboot on PCIe endpoints of CPU PCIe x4 slot (coreboot printed a lot of exceptions and simply halted). TEST=Boot the MSI PRO Z690-A DDR4 WiFi with all PCIe/M.2 slots populated and check if they are detected and functional in Linux. Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com> Change-Id: I50199d2caf54509a72c5100acb770bf766327e7f Reviewed-on: https://review.coreboot.org/c/coreboot/+/63656 Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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.
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.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig and make nconfig)Please consult https://www.coreboot.org/Build_HOWTO for details.
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.
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
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.