Maulik V Vaghela 38b8bf02d8 intelblocks: Add function to program GPE_EN before GPIO locking
Since coreboot locks GPIO registers after GPIO configuration, OS is not
able to program GPE_EN register to program wake events. This causes
the issue of event not getting logged into event log (since GPE_EN bit
is not set).

GPE_EN register programming is required for the GPIO pins which are
capable of generating SCI for the system wake. Elog mechanism relies
on GPE_EN and GPE_STS bit to log correct wake signal.

This patch add supports to program GPE_EN register before coreboot locks
the GPIO registers. Note that coreboot will only program GPE_EN bits for
GPIO capable of generating SCI.

This will help resolve issue where we don't see wake event GPIO in event
log.

BUG=b:222375516
BRANCH=firmware-brya-14505.B
TEST=Compile code for Brya and see GPE_EN bits set from the kernel console

Change-Id: I27e525f50c374c2cc9675e77eaa7774683a6e7c2
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64089
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
2022-05-16 04:58:30 +00:00
2019-09-10 12:52:18 +00:00
2022-04-19 13:00:36 +00:00
2012-11-01 23:13:39 +01:00
2022-03-08 18:53:47 +00:00
2006-08-12 22:03:36 +00:00
2022-03-31 17:37:59 +00:00
2022-05-12 18:42:37 +00:00

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.

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