2ac743330c
Currently, the serial console does not work.
With the serial port enabled in the vendor firmware, `superiotool` outputs
the global control register values below.
Found Nuvoton NCT6779D (id=0xc562) at 0x2e
Register dump:
idx 10 11 13 14 1a 1b 1c 1d 20 21 22 24 25 26 27 28 2a 2b 2c 2f
val ff ff ff ff 3a 28 00 10 c5 62 df 04 00 00 10 00 48 20 00 01
def ff ff 00 00 30 70 10 00 c5 62 ff 04 00 MM 00 00 c0 00 01 MM
UART A needs to be enabled in CR 0x2a by clearing bit 7. Do this by
selecting the Super I/O Kconfig symbol `SUPERIO_NUVOTON_COMMON_COM_A`.
This changes the default value 0xc0 to 0x40.
Note, due configuring the system as legacy free with
`HUDSON_LEGACY_FREE=y`, AGESA in romstage disables the LPC controller in
`FchInitResetLpcProgram()`.
coreboot-4.12-3417-g192b9576fe Tue Oct 20 09:15:53 UTC 2020 romstage starting (log level: 7)...
APIC 00: CPU Family_Model = 00610f31
APIC 00: ** Enter AmdInitReset [00020007]
Fch OEM config in INIT RESET
`AmdInitReset() returned AGESA_SUCCESS` is not transmitted anymore. Only
when coreboot enables the LPC controller again in ramstage, serial output
continues.
PCI: 00:14.4 bridge ctrl <- 0013
PCI: 00:14.4 cmd <- 00
PCI: 00:14.5 cmd <- 02
PCI: 00:15.0 bridge ctrl <- 0013
PCI: 00:15.0 cmd <- 00
PCI: 00:15.1 bridge ctrl <- 0013
[…]
done.
BS: BS_DEV_ENABLE run times (exec / console): 0 / 30 ms
Initializing devices...
CPU_CLUSTER: 0 init
[…]
Note, due to incorrect Super I/O configuration in the devicetree, the boot
hangs in `PCI: 00:14.3 init` when doing `outb(0, DMA1_RESET_REG)`. This
will be fixed in follow-up commits.
TEST=Receive (some) coreboot log messages over the serial console.
Change-Id: I0aa367316f274ed0dd5964ba5ed045b9aeaccf8d
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39371
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
|
||
|---|---|---|
| 3rdparty | ||
| configs | ||
| Documentation | ||
| LICENSES | ||
| payloads | ||
| src | ||
| tests | ||
| util | ||
| .checkpatch.conf | ||
| .clang-format | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmodules | ||
| .gitreview | ||
| AUTHORS | ||
| COPYING | ||
| gnat.adc | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc | ||
| README.md | ||
| 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 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.