DBOX2 BOOTMANAGER PACKET DRIVER

If the Bmon is not in Debug-Mode now, it denies execution of the boot file if the signature is invalid and reboots. The complete path is read from the parameter “nfsroot”. U-boot executes the commands that were built into it when compiling. This is used for displaying a boot logo and is not critical for booting. First the Bmon is executed. This bootfile is the second stage bootloader Bmon is the first, read the details here.

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Diese Seite wurde zuletzt am This is used for displaying a boot logo and is dboz2 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”. That is why you need a special U-boot for use with the Bootmanager. It has no knowledge of IP addresses, so the DBox2 does not have one anymore. The variables serverip,rootpath,ipaddr,gatewayip,netmask and hostname are being requested via DHCP.

First the Bmon is executed. The second-but-last step if the request of the newly assigned bootfile, the Linux-Kernel. The Bmon stores it in memory. The Windows- Bootmanager does not recognize this option, so it will always serve the U-boot as bootfile.

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Dbox2:CDK YADD Boot Procedure – TuxBoxWIKI

After that, network communication follows. This way the Bmon receives all neccessary data. The complete path is read from the parameter “nfsroot”.

Which one of these configurations is used when compiling is determined by the symlink u-boot. Ansichten Lesen Quelltext anzeigen Versionsgeschichte. If the Bmon oacket not in Debug-Mode now, it denies execution of the boot file if the signature is invalid and reboots. U-boot executes the commands that were built into it when compiling. As the Kernel is an executable file, it may be passed some arguments.

This bootfile is the second stage bootloader Bmon is the first, read the details here. Those who like to have it individual should look at the directory u-boot-config in the CDK.

U-boot is much more sophisticated than the Bmonbut it knows nothing about paccket happened until now. These are being kept hardcoded in the U-bootas laid out by the U-boot configuration, in the environment variable “bootargs”.

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Afterwards the program boottmanager is executed by the kernel, ending the kernel boot procedure. 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:. These parameters tell the Kernel everything it has got to know for booting.

Dbox2:CDK YADD Boot Procedure

One thing is important to note: Mai um When the transfer is done, it computes the signature. The bootfile is now being sent to the DBox2.

So The following is only valid for the CDK configuration. Theoretically, you might as well interrupt the autostart of U-boot and enter commands manually. The Linux-Kernel is being loaded to the main memory of the DBox2.

What follows is the usual initialization of system and applications. This would create an infinite loop. Different configurations are kept there.