The dhcp command see below will also also automatically run the tftp command to get uImage. In a nutshell, the kernel makes clever use of macros and GCC attributes to ensure that initialisation functions and pointers to them are stored in unique sections of the ELF. This is done with a combination of the default u-boot environment variables and the bootscript boot. This command can also be used to save a copy of an existing environment variable. The exact nature of the function varies between architectures. In addition, the macro ensures the function pointer is located in a special section of the ELF – we’ll see why shortly.
|Date Added:||28 February 2009|
|File Size:||41.8 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
So the only real difference here is that the boot script is bypassed. The optimisation provided by the init call mechanism also provides a means for recovering memory used by the initialisation data. So at present, we msc911x ensured that all our initialisation code and data is stored in the. This is a particular strength of the init call mechanism: This line is telling us that k of memory that previously lknux initialisation code and data has now been freed.
Linux Kernel Driver DataBase: CONFIG_SMCX: SMSC LAN support
This page was last modified on 13 Augustat The best part of this mechanism is that the provided macros completely hide its underlying complexity, thus leaving more time for driver developers to focus on the job at hand.
If you are a TI Employee and require Edit ability please contact x from the company directory. Now, let’s take a closer look and see how it works under the hood.
His final year dissertation involved the creation linhx a ‘black-box’ for a sail plane glider that would assist in the automated marking of aerobatic gliding competitions. Finally, once all init code has been executed, the entire ELF section. To print all environment variables type ” printenv ” or just ” pri ” at the u-boot prompt.
It is now possible ssmc911x create define environment variables for performing different types of kernel loading and different types of file system mounting. This is done with a combination of the default u-boot environment variables and the bootscript boot. Discuss this article with The Answer Gang. This will replace the “loaduimage” command in bootcmd. This command can also be used to save a copy of an existing environment variable. To boot from something other than the SD card, it is necessary to modify the u-boot environment variables.
In a nutshell, the kernel makes clever use of macros and GCC attributes to ensure that initialisation functions and pointers to them are stored in unique sections of the ELF.
[PATCH 6/7] smc911x: update chip detection
Released under the Open Publication License unless ilnux noted in the body of the article. Here is an example where “bootcmd” is saved off to another name and a new “bootcmd” is generated. It will do apt-get update and install minicom picocom is alternative and easiertftp server, nfs server Finally we are in a position to see how these functions get called and how they are eventually freed.
Please post only comments about the article Modifying U-boot here. It’s clever because its functionality is largely abstracted from the driver developer, and it’s well-optimised because after initialisation, memory containing the initialisation code is released. OK – So we’ve seen how the mechanism is used.
[PATCH 6/7] smcx: update chip detection
These are not in the default environment, but they can be easily added. This article explores how this mechanism works. You can see this in the output from kernel e. Initialisation code at kernel startup then iterates through these function pointers and executes them in turn.
The exact nature of the function varies between architectures.
Navigation menu Personal tools Log in Request account. What we are really interested here is the ‘section’ attribute. This page has been accessed 36, times.
These can be mixed and matched to perform various types of booting. The example below would have to be modified depending on the actual IP address and location of the NFS mount point. Content is no longer maintained and is being kept for reference only!