5ae96aa171
Move PSP_SHAREDMEM_DRAM_END after _etransfer_buffer to ensure that the transfer buffer actually lives within the 32KiB that is supported to be transferred. Resulting symbol address change in bootblock.debug file summarized below. BEFORE: 02011000 T _psp_sharedmem_dram 02011000 T _transfer_buffer 02011000 T _transfer_info 02011040 T _etransfer_info 02011040 T _vboot2_work 02014040 T _evboot2_work 02019000 T _epsp_sharedmem_dram 02019000 T _preram_cbmem_console 0201a600 T _epreram_cbmem_console 0201a600 T _timestamp 0201a800 T _etimestamp 0201a800 T _fmap_cache 0201ac52 T _efmap_cache 0201ac52 T _etransfer_buffer AFTER: 02011000 T _psp_sharedmem_dram 02011000 T _transfer_buffer 02011000 T _transfer_info 02011040 T _etransfer_info 02011040 T _vboot2_work 02014040 T _evboot2_work 02014040 T _preram_cbmem_console 02015640 T _epreram_cbmem_console 02015640 T _timestamp 02015840 T _etimestamp 02015840 T _fmap_cache 02015c92 T _efmap_cache 02015c92 T _etransfer_buffer 02019000 T _epsp_sharedmem_dram BUG=b:167243965 BRANCH=None TEST=checked 'cbmem -1' for FMAP error after ec reboot Signed-off-by: Josie Nordrum <josienordrum@google.com> Change-Id: I9b482aced5deb40bd87d19d9c42585d8a6db5fc0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45045 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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_TOOLCHAINKconfig 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 menuconfigandmake 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:
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.