If the Bmon is not in Debug-Mode now, it denies execution of the boot file if the signature is invalid and reboots. Different configurations are kept there. It has no knowledge of IP addresses, so the DBox2 does not have one anymore. U-boot is much more sophisticated than the Bmon , but it knows nothing about what happened until now. Ultimately, the U-boot executes the command “bootm”, which then starts the Linux-Kernel and passes its parameters in the environment variable “bootargs”.
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Those who like to have it individual should look at the directory u-boot-config in the Bootnanager. Afterwards the program “init” is executed by the kernel, ending the kernel boot procedure. The Windows- Bootmanager does not recognize this option, so it will always serve the U-boot as bootfile.
This bootfile is the second stage bootloader Bmon is the first, read the details here. The complete path is read from the parameter “nfsroot”.
First the Bmon is executed. With activated Debug-Mode it prints an error message, but executes the bootfile nevertheless, in our application the bootfile is u-boot. The CDK -boot arguments are as follows:. U-boot is much more sophisticated than the Bmonbut it knows nothing about what happened until now. This way the Bmon receives all neccessary data.
One thing is important to note: U-boot executes the commands that were built into it when compiling. Different configurations are kept there.
Dbox2:CDK YADD Boot Procedure – TuxBoxWIKI
If the Bmon is not in Debug-Mode now, it denies execution of the boot file if the signature is invalid and reboots. The second-but-last step if the request of the newly dgox2 bootfile, the Linux-Kernel.
This would create an infinite loop. These parameters tell the Kernel everything it has got to know for booting. These are being kept hardcoded bootmaanager the U-bootas laid out by the U-boot configuration, in the environment variable “bootargs”.
Dbox2:CDK YADD Boot Procedure
After that, network communication follows. Diese Seite wurde zuletzt am So The following is only valid for the CDK configuration. When the transfer is done, it computes the signature. The variables serverip,rootpath,ipaddr,gatewayip,netmask and hostname are being requested via DHCP. As the Kernel is an executable file, it may be passed some arguments. It has no knowledge of IP addresses, so the DBox2 does not have one anymore. Ansichten Lesen Quelltext anzeigen Versionsgeschichte.
Ultimately, the U-boot executes the command “bootm”, which then starts the Linux-Kernel and passes its parameters in the environment variable “bootargs”. The bootfile is now being sent to the DBox2. The Linux-Kernel is being loaded to the main memory of the DBox2.
Theoretically, you might as well interrupt the autostart of U-boot and enter commands manually. The Bmon stores it in memory.
What follows is the usual initialization of system and applications. Mai um That is why you need a special U-boot for use with the Bootmanager. Which bootmanagerr of these configurations is used when compiling is determined by the symlink u-boot.