|author||Mario Scheithauer <email@example.com>||Tue Nov 06 14:59:11 2018 +0100|
|committer||Werner Zeh <firstname.lastname@example.org>||Mon Nov 12 07:25:07 2018 +0000|
siemens/mc_apl3: Adjust Legacy IRQ routing for PCI devices On this mainboard there is a legacy PCI device, which is connected to the PCIe root port via a PCIe-2-PCI bridge. This device only supports legacy interrupt routing. For this reason we have to adjust the PIR6 register (0x314c) which is responsible for PCIe device 13h and 14h. This means that the interrupt routing will also be the same for both PCIe devices. The bridge is connected to PCIe root port 2 and 3 over two lanes (Device 13.0 and 13.1). The following routing is required: INTA#->PIRQD#, INTB#->PIRQA#, INTC#->PIRQB#, INTD#->PIRQC# Change-Id: I5028c26769a2122b1c609ad7789c9949e3cb7a87 Signed-off-by: Mario Scheithauer <email@example.com> Reviewed-on: https://review.coreboot.org/29513 Reviewed-by: Werner Zeh <firstname.lastname@example.org> Tested-by: build bot (Jenkins) <email@example.com>
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.
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.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAINKconfig option if you're feeling lucky (no support in this case).
Please consult https://www.coreboot.org/Build_HOWTO for details.
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.
Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:
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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.