If your platform is not listed, please get in contact with the sys-boot/u-boot package maintainers or file a bug. The nf file should be placed in /boot/extlinux/nf. If you intend to use U-Boot as an efi runtime, proceed as with a grub-efi installation.Īlternatively U-Boot can read a configuration file named nf, similar to how grub reads grub.cfg. U-Boot can emulate an efi runtime on arm and arm64. U-Boot uses its own device tree (often taken from the linux source tree) configured at build time. This device tree gets passed to the kernel by U-Boot.
#U boot configuration file install
To install the device tree, mount your boot partition and run make dtbs & make dtbs_install in your kernel source directory. Most ARM platforms lack ACPI or any form of autodetecting their hardware layout, instead the hardware is statically described in device trees. This is platform specific, please see below. Thus, it must be flashed onto your block device with dd. On most platforms, U-Boot is not read as a file like on an UEFI system, but directly from the block layer similar to MBR booting. If your platform uses TF-A, you need to provide the location in your make arguments. In most cases, using your platforms defconfig should suffice. As such, it can be configured via your preferred flavor of config menu, such as make menuconfig. U-Boot uses Kbuild, the same build system as the linux kernel. You can alternatively build sys-firmware-a/trusted-firmware-a yourself, however this may require special toolchains and as such we default to the binary package. As such, sys-firmware/trusted-firmware-a-bin is pulled in by default. Most armv8 platforms run the TF-A open source platform hypervisor, which is normally built into U-Boot. Since U-Boot has a vast array of configuration possibilities, similar to the linux kernel (and using the same build system), U-Boot is installed as a source package in /usr/src/
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