No description
86bd91a69a
When across warm reset, if VDD_3V3_SD_CARD gets power-cycled but VDDIO_SDMMC3 does not, we will get ~1.5V leakage on VDD. To fix that, we reset VDDIO_SDMMC3 to 0 along with VDD_3V3_SD_CARD in Coreboot. Payloads must turn on VDDIO_SDMMC3 explicitly before accessing SD card. Note the warnings of "VDD_SDMMC must set early" in comment seems only happens on U-Boot and can be removed. BUG=chrome-os-partner:27053 BRNACH=nyan TEST=Ctrl-U to boot from SD card, login and type "reboot", then Ctrl-U to boot again. Without this patch, system will fail in loading kernel. Original-Change-Id: I7f85995317d18587d514ea3afcff3bfea0a33e93 Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/196961 Original-Reviewed-by: Gabe Black <gabeblack@chromium.org> Original-Tested-by: Andrew Bresticker <abrestic@chromium.org> (cherry picked from commit 2cfdb78d9dc229a3c06f19bbe137d59d923908a4) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ie7d814e0424478c35a56fbc959437ee6a555684a Reviewed-on: http://review.coreboot.org/7866 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> |
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3rdparty@9f68e20e5e | ||
documentation | ||
payloads | ||
src | ||
util | ||
.gitignore | ||
.gitmodules | ||
.gitreview | ||
COPYING | ||
Makefile | ||
Makefile.inc | ||
README | ||
toolchain.inc |
------------------------------------------------------------------------------- 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 http://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: * http://www.coreboot.org/Supported_Motherboards * http://www.coreboot.org/Supported_Chipsets_and_Devices Build Requirements ------------------ * gcc / g++ * make Optional: * doxygen (for generating/viewing documentation) * iasl (for targets with ACPI support) * gdb (for better debugging facilities on some targets) * ncurses (for 'make menuconfig') * flex and bison (for regenerating parsers) Building coreboot ----------------- Please consult http://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 http://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: http://www.coreboot.org You can contact us directly on the coreboot mailing list: http://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.