.. SPDX-License-Identifier: GPL-2.0+: .. index:: single: fatload (command) fatload command =============== Synopsis -------- :: fatload [ [ [ [bytes [pos]]]]] Description ----------- The fatload command is used to read a file from a FAT filesystem into memory. You can always use the :doc:`load command ` instead. The number of transferred bytes is saved in the environment variable filesize. The load address is saved in the environment variable fileaddr. interface interface for accessing the block device (mmc, sata, scsi, usb, ....) dev device number part partition number, defaults to 0 (whole device) addr load address, defaults to environment variable loadaddr or if loadaddr is not set to configuration variable CONFIG_SYS_LOAD_ADDR filename path to file, defaults to environment variable bootfile bytes maximum number of bytes to load pos number of bytes to skip addr, bytes, pos are hexadecimal numbers. If either 'pos' or 'bytes' are not aligned according to the minimum alignment requirement for DMA transfer (ARCH_DMA_MINALIGN) additional buffering will be used, a misaligned buffer warning will be printed, and performance will suffer for the load. Example ------- :: => fatload mmc 0:1 ${kernel_addr_r} snp.efi 149280 bytes read in 11 ms (12.9 MiB/s) => => fatload mmc 0:1 ${kernel_addr_r} snp.efi 1000000 149280 bytes read in 9 ms (15.8 MiB/s) => => fatload mmc 0:1 ${kernel_addr_r} snp.efi 1000000 100 149024 bytes read in 10 ms (14.2 MiB/s) => => fatload mmc 0:1 ${kernel_addr_r} snp.efi 10 16 bytes read in 1 ms (15.6 KiB/s) => Configuration ------------- The fatload command is only available if CONFIG_CMD_FAT=y. Return value ------------ The return value $? is set to 0 (true) if the file was successfully loaded even if the number of bytes is less then the specified length. If an error occurs, the return value $? is set to 1 (false).