mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 11:13:07 +00:00
81 lines
1.9 KiB
ReStructuredText
81 lines
1.9 KiB
ReStructuredText
|
.. SPDX-License-Identifier: GPL-2.0+:
|
||
|
|
|
||
|
|
fatload command
|
||
|
|
===============
|
||
|
|
|
||
|
|
Synopsis
|
||
|
|
--------
|
||
|
|
|
||
|
|
::
|
||
|
|
|
||
|
|
fatload <interface> [<dev[:part]> [<addr> [<filename> [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 <load>` 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).
|