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review.coreboot.org / coreboot / 777099046f88f96921e21ad2e0a58b2fe66b25aa
commit777099046f88f96921e21ad2e0a58b2fe66b25aa[log] [tgz]
authorWerner Zeh <werner.zeh@siemens.com>Mon Aug 29 12:44:02 2022 +0200
committerPaul Fagerburg <pfagerburg@chromium.org>Thu Sep 22 15:34:24 2022 +0000
tree0169a8a4c2da1e267c49248682eaa2b3dbed85c2
parent3083f359c88d1d94587b2ed715a14a3d01ca1034 [diff]
soc/intel/spi: Move BIOS flash SPI controllers to fast SPI driver

There are two classes of SPI controllers on Intel chipsets:
 * generic usable SPI controllers
 * SPI controller hosting the BIOS flash (fast SPI controller)

While the first class can be used for generic peripheral attachment the
second class mostly controls the BIOS flash and a TPM device (if
enabled). The generic SPI driver is not fully applicable to the fast SPI
controller. In addition, the fast SPI controller reports the reserved
MMIO range used for the BIOS flash mapping so that the OS is aware of
this range.

This patch moves the fast SPI controller of all known SoCs to the
fast SPI driver in common code. In addition, the PCI device for the
fast SPI controller is removed from the function 'spi_soc_devfn_to_bus'
as this is a callback of the generic SPI driver.

Change-Id: Ia881c1d274acdcf7f042dd8284048a7dd018a84b
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67173
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
10 files changed
tree: 0169a8a4c2da1e267c49248682eaa2b3dbed85c2
  1. 3rdparty/
  2. configs/
  3. Documentation/
  4. LICENSES/
  5. payloads/
  6. spd/
  7. src/
  8. tests/
  9. util/
  10. .checkpatch.conf
  11. .clang-format
  12. .editorconfig
  13. .gitignore
  14. .gitmodules
  15. .gitreview
  16. .mailmap
  17. AUTHORS
  18. COPYING
  19. gnat.adc
  20. MAINTAINERS
  21. Makefile
  22. Makefile.inc
  23. README.md
  24. 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_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).
  • iasl (for targets with ACPI support)
  • pkg-config
  • libssl-dev (openssl)

Optional:

  • gdb (for better debugging facilities on some targets)
  • ncurses (for make menuconfig and make 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:

https://www.coreboot.org

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.