coreboot changes

The coreboot blog has a long post, which covers the last five weeks of changes, and there were a lot: 314 commits. Some highlights:

Over one third of the commits covers Intel Skylake development, where boards and chipset code saw misc improvements and tons of clean ups.

There also was a notable effort of unifying common code across the more recent Intel SoCs, removing lots of duplicated code all over the place.

On x86, the romstage is now relocated for its final location in CBFS by cbfstool, obsoleting the old approach that had us link it twice, once to determine its final size and then to the actual location it’s supposed to run from. In the future this same approach may be extended to other files that need to be executed in place such as the FSP binary.

The romstage change eliminated the need for cbfstool’s “locate” command, and so it was removed. cbfstool also saw other extensions, the biggest one a compatible change to the format to allow for per-file attributes in CBFS. These attributes can contain additional information about a file, currently the compression method and uncompressed size of a file. cbfstool and the build system were extended to allow compressing files, libpayload is able to uncompress these files.

On the AMD side, there were various bugfixes both for new (merlin falcon) and old (Fam10) chipsets.

ARM64 and Tegra210 saw various bugfixes and improvements to power use. For the latter, coreboot also learned how to reserve memory for other functions than the main processor.
Rockchip’s RK3288 ARMv7 SoC also saw a number of bug fixes and the code was restructured to use a single mainboard directory for a large number of very similar Google Veyron mainboards based on that SoC.

Our RISCV support now boots on the Spike simulator which (besides supporting a wider variety of emulators) is notable because unlike the QEmu RISCV support, Spike supports RISCV’s revised ABI.
Speaking of emulators, recent versions of qemu-x86 expect the firmware to initialize the LAPIC, which we now do.

The ongoing effort to move CPU microcode into CBFS (and to store these as binaries in 3rdparty/blobs instead of header files in the main sources) saw some progress.

Lots of interesting things were omitted above. Full post:

http://blogs.coreboot.org/blog/2015/09/28/coreboot-changelog-most-of-september-edition/

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