commit | 3dea2b63eeb8f97b31571f6f0eb37f38f9967b6b | [log] [tgz] |
---|---|---|
author | Angel Pons <th3fanbus@gmail.com> | Thu Oct 01 22:50:12 2020 +0200 |
committer | Angel Pons <th3fanbus@gmail.com> | Tue Nov 03 17:04:03 2020 +0000 |
tree | 6d9843c11049d2ce89c55bd8deb451d542caee3c | |
parent | 88991caf00d3b8862bc3c1aa4497baeb67e910e6 [diff] |
soc/intel/common/block/systemagent/memmap.c: Align cached region When asked to place cbmem_top(), FSP does not seem to care about alignment. It can return an address that is MTRR poison, which will exhaust all variable MTRRs when trying to set up caching for CBMEM. This will make memory-mapped flash and TSEG caching fail as well. Safeguard against this by aligning the region to cache to half of its size, and move it upwards to compensate. It is assumed that caching memory above the provided bootloader TOLUM address is inconsequential. TEST=Boot Purism Librem Mini WHL, observe no MTRR exhaustion error messages in console. The boot process also feels more fluid. Change-Id: Ic64fd6d3d9e8ab4c78d68b910a476f9c4eb2d353 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45930 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.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.