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Aspeed AST2500 EVB Introduction ============ The AST2500 EVB is an evaluation board for the AST2500 SoC, most commonly used as a Server Management Processor. It includes an 800MHz ARM11 processor with DDR3 or DDR4 SDRAM (up to 1GB), SPI flash memory devices for BMC and host firmwares and numerous controllers to drive the server board. https://www.aspeedtech.com/server_ast2500/ How to build it =============== Configure buildroot: $ make aspeed_ast2500evb_defconfig Compile everything and build the rootfs image: $ make Result of the build =================== After building, the output/images directory contains: output/images/ ├── aspeed-ast2500-evb.dtb ├── flash.img ├── image.itb ├── rootfs.cpio ├── rootfs.cpio.xz ├── rootfs.tar ├── u-boot.bin └── zImage Flashing the image ================== To update the contents of the first flash device, copy flash.img : $ flashcp flash.img /dev/mtd0 or simply the boot loader: $ flashcp u-boot.bin /dev/mtd1 Preparing the board =================== * Connect a serial line to the board * Power-up the board Booting the board ================= The AST2500 EVB boots from the SPI flash device directly and loads a first bootloader (usually U-Boot). U-Boot will attempt to load a Linux kernel from the same flash device by default but other storage could be used. * from U-Boot The FIT image image.itb can be used to boot the board from U-Boot using tftp * with QEMU $ qemu-system-arm -M ast2500-evb \ -drive file=output/images/flash.img,format=raw,if=mtd \ -nographic $ qemu-system-arm -M ast2500-evb \ -kernel output/images/zImage \ -initrd output/images/rootfs.cpio \ -dtb output/images/aspeed-ast2500-evb.dtb \ -nographic