$> cat /proc/ioports
Sample output is as follows:
Wednesday, September 4, 2019
Linux: How to check the IO address space on your Linux machine
The parallel port is at address 0x0378?
This is the IO address space and this information is provided under the /proc file system as:
Sample output is as follows:
Sample output is as follows:
Tuesday, September 3, 2019
Linux: Implementing tftpboot with Linux u-boot
If your u-boot is not running tftpboot, for any reason as is the case with my board, you can always fool it into doing tftpboot for you by leveraging the run support in the u-boot bootloader.
U-boot is a very popular bootloader and you can learn more about it here: http://www.denx.de/wiki/U-Boot
Here is the trick to implement it:
In the above set of commands you will have to replace LOADADDR with the correct address in memory where you want to load the image. The PATH_TO_TFTPIMAGE is the path to the image on the tftpserver.
U-boot is a very popular bootloader and you can learn more about it here: http://www.denx.de/wiki/U-Boot
Here is the trick to implement it:
setenv bootcmd 'dhcp; run cmd'
setenv cmd 'tftp LOADADDR PATH_TO_TFTPIMAGE'
In the above set of commands you will have to replace LOADADDR with the correct address in memory where you want to load the image. The PATH_TO_TFTPIMAGE is the path to the image on the tftpserver.
