commit | 61f44127f0c06688343fdfa3f518a58b4efe170c | [log] [tgz] |
---|---|---|
author | Raul E Rangel <rrangel@chromium.org> | Fri Jun 25 11:24:38 2021 -0600 |
committer | Raul Rangel <rrangel@chromium.org> | Sun Jul 18 15:17:30 2021 +0000 |
tree | 869a1413ce1c155ef489dfe6a6bd643b777f75b7 | |
parent | fca58334c8e08427ff9f87e5d121f487d7f45484 [diff] |
soc/amd/cezanne: Start loading APOB asynchronously This enables COOP_MULTITASKING (i.e., multiple stacks single CPU). This will allow the APOB to start loading while FSP-S executes. BUG=b:179699789 TEST=Boot guybrush and verify APOB read timestamp has dropped from 10ms to a few uS. Starting APOB preload APOB thread running spi_dma_readat_dma: start: dest: 0xcb7aa640, offset: 0x0, size: 65536 took 0 us to acquire mutex start_spi_dma_transaction: dest: 0xcb7aa640, offset: 0x0, remaining: 65536 <ramstage doing work> spi_dma_readat_dma: end: dest: 0xcb7aa640, offset: 0x0, size: 65536, remaining: 0 <more work..> waiting for thread took 0 us APOB valid copy is already in flash Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I4b5c1ef4cad571d1cbca33b1aff017a3cedc1bea Reviewed-on: https://review.coreboot.org/c/coreboot/+/56234 Reviewed-by: Karthik Ramasubramanian <kramasub@google.com> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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.
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.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN
Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig
and make nconfig
)Please consult https://www.coreboot.org/Build_HOWTO for details.
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.
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
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.