f87ff33a89
In CSE Firmware Custom SKU, CSE region is logically divided into
2 boot partitions. These boot partitions are represented by BP1(RO),
BP2(RW). With CSE Firmware Custom SKU, CSE can boot from either
RO(BP1) or RW(BP2).
The CSE Firmware Custom SKU layout appears as below:
------------- -------------------- ---------------------
|CSE REGION | => | RO | RW | DATA | => | BP1 | BP2 | DATA |
------------- -------------------- ---------------------
In order to support CSE FW update to RW region, below APIs help coreboot
to get info about the boot partitions, and allows coreboot to set CSE
to boot from required boot partition (either RO(BP1) or RW(BP2)).
GET_BOOT_PARTITION_INFO - Provides info on available partitions in the CSE
region. The API provides info on boot partitions like start/end offsets
of a partition within CSE region, and their version and partition status.
SET_BOOT_PARTITION_INFO - Sets CSE's next boot partition to boot from.
With the HECI API, firmware can notify CSE to boot from RO(BP1) or RW(BP2)
on next boot.
As system having CSE Firmware Custom SKU, boots from RO(BP1) after G3,
so coreboot sets CSE to boot from RW(BP2) in normal mode and further,
coreboot ensure CSE to boot from whichever is selected boot partition
if system is in recovery mode.
BUG=b:145809764
TEST=Verified on hatch
Change-Id: Iaa62409c0616d5913d21374a8a6804f82258eb4f
Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35402
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
|
||
|---|---|---|
| 3rdparty | ||
| Documentation | ||
| LICENSES | ||
| configs | ||
| payloads | ||
| src | ||
| tests | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| 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:
- doxygen (for generating/viewing documentation)
- 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.