This bootfile is the second stage bootloader Bmon is the first, read the details here. First the Bmon is executed. Those who like to have it individual should look at the directory u-boot-config in the CDK. Theoretically, you might as well interrupt the autostart of U-boot and enter commands manually. This is used for displaying a boot logo and is not critical for booting.
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As the Kernel is an executable file, it may be dboc2 some arguments. U-boot executes the commands that were built into it when compiling.
Ansichten Lesen Quelltext anzeigen Versionsgeschichte. Different configurations are kept there. Those who like to have it individual should look at the bootmanageer u-boot-config in the CDK. This bootfile is the second stage bootloader Bmon is the first, read the details here.
What follows is the usual initialization of system and applications. One thing is important to note: The variables serverip,rootpath,ipaddr,gatewayip,netmask and hostname are being requested via DHCP.
When the transfer is done, it computes the signature. Theoretically, you might as well interrupt the autostart of U-boot and enter commands manually.
Dbox2:CDK YADD Boot Procedure – TuxBoxWIKI
This would create an infinite loop. The second-but-last step if the request of the newly assigned bootfile, the Linux-Kernel. Diese Seite wurde zuletzt am First the Bmon is executed.
So The following is only valid for the CDK configuration.
The CDK -boot arguments are as follows:. That is why you need a special U-boot for use with the Bootmanager. These parameters tell the Kernel everything it has got to know for booting.
The bootfile is now being sent to the DBox2. With activated Debug-Mode boormanager prints an error message, but executes the bootfile nevertheless, in our application the bootfile is u-boot. This way the Bmon receives all neccessary data. The Bmon stores it in memory.
Dbox2:CDK YADD Boot Procedure
Afterwards the program “init” is executed by the kernel, ending the kernel boot procedure. Mai um After that, network communication follows.
These are being kept hardcoded in the U-bootas laid out by the U-boot configuration, in the environment variable “bootargs”. U-boot is much more sophisticated than the Bmonbut it knows nothing about what happened until now.
It has no knowledge of IP addresses, so the DBox2 does not have one anymore.
The complete path is read from the parameter “nfsroot”. The Linux-Kernel is being loaded to the main memory of the DBox2. This is used for displaying a boot logo and is not critical for booting. Ultimately, the U-boot executes the command “bootm”, which then starts the Linux-Kernel and passes its parameters in the environment variable “bootargs”.
The Windows- Bootmanager does not recognize this option, so it will always serve the U-boot as bootfile. Which one of these configurations is used when compiling is determined by the symlink bootmanxger. If the Bmon is not in Debug-Mode now, it denies execution of the boot file if the signature is invalid and reboots.