7d6697d51c
This change adds mem_list_variant.txt that contains the list of
memory parts used by halvor and Makefile.inc generated by
gen_part_id.go using mem_list_variant.txt.
In the final change of the series, all volteer variants will be
switched from using the current SPDs to new auto-generated SPDs.
Differences in auto-generated SPD from current SPD are as follows:
Part: H9HKNNNCRMBVAR-NEH
Byte# Current New Explanation
4 0x16 0x15 As per datasheet, density is 8Gb per
logical channel. So value should be 0x15.
6 0xB9 0x94 Signal loading is not used by
MRC. Set bits 1:0 to 00. 2 channels 2
dies. Hence, 0x94
19 0x0F 0xFF As per JEDEC spec, tckMax should be
100ns. So, value should be 0xff as
per datasheet.
29,30 0xE0,0x0B 0xC0,0x08 As per datasheet, this corresponds to
280ns in MTB units which is 0x08C0.
31,32 0xF0,0x05 0x60,0x04 As per datasheet, this corresponds to
140ns in MTB units which is 0x0460.
125 0xE1 0xE0 Fine offset for tckMin. tckMin is
calculated as (1/4267)*2 which comes
out to be 0.46871. Some datasheets
round this down to 0.468 and others
round it up to 0.469. JEDEC spec uses
0.468. As per that, this value comes
out to be 0xE0.
Part: MT53E1G64D4SQ-046 WT:A
Byte# Current New Explanation
5 0x21 0x29 As per datasheet, this part has 17row
address bits and 10column address
bits. This results in 0x29.
6 0xB9 0x94 Signal loading is not used by
MRC. Set bits 1:0 to 00. 2 channels,
2 dies. Hence, 0x94.
19 0x0F 0xFF As per JEDEC spec, tckMax should be
100ns. So, value should be 0xff as
per datasheet.
125 0xE1 0xE0 Fine offset for tckMin. As per
datasheet tckMin is 0.468ns. So, this
comes out to be 0xE0.
BUG=b:147321551,b:155423877
Change-Id: I28b065a00380516d8686279a92ef68b9f17e2f65
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41616
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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||
|---|---|---|
| 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.