ca741055e6
The Alder Lake chipset has several more reserved memory regions that are unavailable to the resource allocator than are currently marked as such in the system agent code. This CL adds the following regions (documented in Intel docs #626540, #619503): 1. TSEG 2. GSM 3. DSM 4. PCH_RESERVED 5. CRAB_ABORT 6. APIC 7. TPM 8. LT_SECURITY Claimed regions before this change: ======================================================== base 0 size a0000 // 0 - > 0xa0000 base a0000 size 20000 // legacy VGA base c0000 size 40000 // RAM base c0000 size 76f40000 // 0xc0000 -> top_of_ram base 77000000 size 9400000 // top_of_ram -> TOLUD base c0000000 size 10000000 // PCIEXBAR base f8000000 size 2000000 // MMSPI base fb000000 size 1000 // REGBAR base fed80000 size 4000 // EDRAMBAR base fed84000 size 1000 // TBT0BAR base fed85000 size 1000 // TBT1BAR base fed86000 size 1000 // TBT2BAR base fed87000 size 1000 // TBT3BAR base fed90000 size 1000 // GFXVTBAR base fed91000 size 1000 // VTVC0BAR base fed92000 size 1000 // IPUVTBAR base feda0000 size 1000 // DMIBAR base feda1000 size 1000 // EPBAR base fedc0000 size 20000 // MCHBAR base 100000000 size 17fc00000 // 4GiB -> TOUUD Claimed regions with this change: ======================================================== base 0 size a0000 // 0 - > 0xa0000 base a0000 size 20000 // legacy VGA base c0000 size 40000 // RAM base c0000 size 76f40000 // 0xc0000 -> top_of_ram base 77000000 size 9400000 // top_of_ram -> TOLUD base 7b800000 size 800000 // TSEG base 7c000000 size 800000 // GSM base 7c800000 size 3c00000 // DSM base c0000000 size 10000000 // PCIEXBAR base f8000000 size 2000000 // MMSPI base fb000000 size 1000 // REGBAR base fc800000 size 2000000 // PCH_RESERVED base feb00000 size 80000 // CRAB_ABORT base fec00000 size 100000 // APIC base fed40000 size 10000 // TPM base fed50000 size 20000 // LT_SECURITY base fed80000 size 4000 // EDRAMBAR base fed84000 size 1000 // TBT0BAR base fed85000 size 1000 // TBT1BAR base fed86000 size 1000 // TBT2BAR base fed87000 size 1000 // TBT3BAR base fed90000 size 1000 // GFXVTBAR base fed91000 size 1000 // VTVC0BAR base fed92000 size 1000 // IPUVTBAR base feda0000 size 1000 // DMIBAR base feda1000 size 1000 // EPBAR base fedc0000 size 20000 // MCHBAR base 100000000 size 17fc00000 // 4GiB -> TOUUD BUG=b:149830546 BRANCH=firmware-brya-14505.B TEST='emerge-brya coreboot chromeos-bootimage' builds correctly. Tested on an Anahera device which successfully boots to ChromeOS with kernel version 5.10.109-15688-g857e654d1705. Also ran dmseg, and saw the added regions in e820 prints. Signed-off-by: Eran Mitrani <mitrani@google.com> Change-Id: I058a5c1cc59703e35ceddb8a7e26fb22a6a2b75e Signed-off-by: Eran Mitrani <mitrani@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/65072 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> |
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| 3rdparty | ||
| Documentation | ||
| LICENSES | ||
| configs | ||
| payloads | ||
| spd | ||
| src | ||
| tests | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| .mailmap | ||
| AUTHORS | ||
| COPYING | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc | ||
| README.md | ||
| gnat.adc | ||
| toolchain.inc | ||
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_TOOLCHAINKconfig option if you're feeling lucky (no support in this case). - iasl (for targets with ACPI support)
- pkg-config
- libssl-dev (openssl)
Optional:
- 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.