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An overview of the source code tree for Das U-Boot, the universal boot loader.
Das U-Boot is a primary and universal boot loader for embedded systems. It is responsible for initializing the target hardware and loading the operating system kernel or application software from various storage devices into memory to begin execution. This project encompasses the entire source tree for building, configuring, and extending U-Boot.
Different embedded systems and development boards require initial hardware configuration and loading of operating system kernels or other software. U-Boot provides a standardized, highly configurable boot loader that addresses this need across a wide range of hardware platforms, simplifying the boot process development.
Supports a vast array of architectures including ARM, ARM64, x86, MIPS, PowerPC, and more.
Extensive device driver support for peripherals like NAND, NOR, SPI, I2C, USB, Ethernet, etc.
Includes basic networking capabilities (TFTP, NFS) for loading kernels and filesystems over the network.
Provides a command-line interface for configuration, testing, and interactive control during the boot process.
Offers support for boot scripts, allowing for complex, automated boot sequences.
U-Boot is essential in any scenario involving booting an operating system or application on embedded hardware where standard PC BIOS/UEFI is not applicable. Common use cases include:
Initializing an ARM-based Single Board Computer (SBC) to load and run a Linux distribution from an SD card or eMMC.
Provides the necessary low-level initialization and kernel loading mechanism for a wide range of popular embedded Linux platforms.
Loading a custom real-time operating system (RTOS) or bare-metal application onto custom industrial or IoT hardware.
Offers a flexible and portable platform to bring up complex custom hardware and load specific application code.
Performing low-level hardware tests, flash programming, or firmware updates on a device during manufacturing or field service.
The U-Boot command line and scripting capabilities enable powerful low-level hardware interaction and diagnostics before the main OS is loaded.
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