988da3142d
This change reorganizes flash map layout for zork to allow WP_RO to
grow to 8MiB. This is to allow more space for the firmware UI screens
in RO. Following changes are made in the layout:
1. MRC_CACHE_HOLE is dropped since only one slot of 64K is used for
MRC cache. Next section can start on 64K boundary immediately after
MRC cache.
2. RW_SECTION_A and RW_SECTION_B are dropped down in size to 3MiB
each. Each region is currently at ~2MiB of usage.
3. RW_ELOG is restrictred to 4KiB as that is the maximum elog size
supported by coreboot.
4. SMMSTORE is restricted to 4K.
5. RW_LEGACY region is dropped down to ~1.9MiB.
BUG=b:161949925
TEST=Verified that write-protection for RO still works fine, device
boots in recovery and non-recovery mode. Also, verified that the dump
of fmap looks correct:
dump_fmap -h firmware/image-trembyle.serial.bin
name start end size
WP_RO 00800000 01000000 00800000
RO_SECTION 00804000 01000000 007fc000
COREBOOT 00875000 01000000 0078b000
GBB 00805000 00875000 00070000
RO_FRID 00804800 00804840 00000040
FMAP 00804000 00804800 00000800
RO_VPD 00800000 00804000 00004000
RW_LEGACY 0061d000 00800000 001e3000
SMMSTORE 0061c000 0061d000 00001000
RW_NVRAM 00617000 0061c000 00005000
RW_VPD 00615000 00617000 00002000
RW_SHARED 00611000 00615000 00004000
VBLOCK_DEV 00613000 00615000 00002000
SHARED_DATA 00611000 00613000 00002000
RW_ELOG 00610000 00611000 00001000
RW_SECTION_B 00310000 00610000 00300000
RW_FWID_B 0060ff00 00610000 00000100
FW_MAIN_B 00312000 0060ff00 002fdf00
VBLOCK_B 00310000 00312000 00002000
RW_SECTION_A 00010000 00310000 00300000
RW_FWID_A 0030ff00 00310000 00000100
FW_MAIN_A 00012000 0030ff00 002fdf00
VBLOCK_A 00010000 00012000 00002000
RW_MRC_CACHE 00000000 00010000 00010000
SI_BIOS 00000000 01000000 01000000
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I882f3d813c08ba5fb0ad071da4f79e723296f4b0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44362
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Joel Kitching <kitching@google.com>
|
||
|---|---|---|
| 3rdparty | ||
| Documentation | ||
| LICENSES | ||
| configs | ||
| payloads | ||
| src | ||
| tests | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| 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:
- 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.