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Rex-BC Chen 4fd80b286b soc/mediatek/mt8186: Modify internal capid to 0xE0
The mainboard may not be able to disable the internal cap, so we want
to set 0xe0 for all boards to minimize the internal cap. And a
mainboard implementation may choose XTAL with higher cload if the
frequency requirement is met, and the total capacitance can be tuned
externally for different boards.

BUG=b:218439447
TEST=set capid to 0xe0.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: I2139e6b3456d7a50e3cdc8fc606e5f6ea3406044
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62563
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2022-03-10 15:04:34 +00:00
3rdparty Update fsp submodule to upstream master 2022-03-01 01:53:17 +00:00
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payloads payloads/tianocore: Add prompt for Boot Timeout 2022-03-09 14:20:30 +00:00
spd util/spd_tools: Encode SDRAM min cycle time (TCKMinPs) 2022-03-08 23:46:50 +00:00
src soc/mediatek/mt8186: Modify internal capid to 0xE0 2022-03-10 15:04:34 +00:00
tests coreboot_tables.c: Expose the ACPI RSDP 2022-03-09 14:21:01 +00:00
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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

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.