commit | 44caa1963fb9e3aa0a392223dab3b9c33acdc441 | [log] [tgz] |
---|---|---|
author | Duncan Laurie <dlaurie@google.com> | Sat Oct 10 00:05:36 2020 +0000 |
committer | Patrick Georgi <pgeorgi@google.com> | Mon Nov 09 07:32:13 2020 +0000 |
tree | 55972f116bd121b5b4d19e39a10d632b63e83b55 | |
parent | 74c16d0a8ba76f07b17d0db58071933b7d7f12b6 [diff] |
intel/common/pmc: Add functions for IPC mailbox in ACPI This change adds two functions that provide an IPC mailbox method via ACPI for runtime clock configuration. pmc_acpi_fill_ssdt_ipc_write_method() will provide a method in the SSDT that can be called by other ACPI devices to send an IPC mailbox command. This function is exported because some SOCs override the default PMC device and need to call this function to write the method into the SSDT. pmc_acpi_set_pci_clock() will call the method defined by the previous function to enable or disable the PCIe SRCCLK for a specified root port and clock pin. It can be called by the PCIe root port after turning off power to the attached device. BUG=b:160996445 TEST=boot on volteer device and disassemble the SSDT to ensure that this method exists. Signed-off-by: Duncan Laurie <dlaurie@google.com> Change-Id: I95f5a1ba2bc6905e0f8ce0e8b2342ad1287a23a0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/46259 Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> 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.