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Matt DeVillier a2804781fe mb/google/cyan: Switch eMMC and SD from ACPI to PCI mode 
Braswell boards don't work well with the eMMC and SD controller
in ACPI in payloads other than depthcharge - SeaBIOS requires
an onerous workaround (manually determining the PCI BAR0 address
for each eMMC and SD controller, then adding adding etc/sdcard
entries to the CBFS), and Tianocore can't see the devices at all.
To make the common use-case work better, switch to PCI mode.

Test: build/boot cyan variants with SeaBIOS and Tianocore
payloads, verify eMMC and SD card visible and bootable to
both payloads and OSes.

Change-Id: I71947603e22a37fe2c8ef4eaac8a3aa0d0ed1cec
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40002
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-04-03 16:24:17 +00:00
3rdparty 3rdparty/libgfxinit: Update submodule pointer 2020-03-09 08:20:12 +00:00
configs configs: Add builder config to create a working Cedar Island CRB 2020-03-26 18:15:04 +00:00
Documentation Doc/mb/index.md: Fix mainboard vendor order 2020-04-03 13:43:35 +00:00
LICENSES LICENSES: Add licenses used in the coreboot repo 2019-10-30 08:23:51 +00:00
payloads cros_ec: add chrome EC headers to include path 2020-04-01 09:19:48 +00:00
src mb/google/cyan: Switch eMMC and SD from ACPI to PCI mode 2020-04-03 16:24:17 +00:00
util util/sconfig: emit NULL sibling fields 2020-03-30 08:37:56 +00:00
.checkpatch.conf
.clang-format lint/clang-format: set to 96 chars per line 2019-06-13 20:14:00 +00:00
.editorconfig Add .editorconfig file 2019-09-10 12:52:18 +00:00
.gitignore cbfstool: Build vboot library 2020-03-23 08:34:23 +00:00
.gitmodules submodules: Add 3rdparty/amd_blobs 2019-10-31 12:28:38 +00:00
.gitreview
AUTHORS AUTHORS: Add authors from util/ 2020-03-18 18:22:37 +00:00
COPYING
gnat.adc
MAINTAINERS Remove myself from MAINTAINERS file 2020-04-01 09:03:18 +00:00
Makefile cbfstool: Build vboot library 2020-03-23 08:34:23 +00:00
Makefile.inc Makefile.inc: Don't run ifittool with CONFIG_UPDATE_IMAGE 2020-03-25 10:51:50 +00:00
README.md README.md: Remove link to deprecated wiki 2019-11-16 20:39:55 +00:00
toolchain.inc Makefile: Remove romcc 2019-12-27 08:59:59 +00:00

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:

  • doxygen (for generating/viewing documentation)
  • 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.