[U-Boot-Users] Doubt regarding bootm in Uboot

[Yasothabalan Ramaswamy-TLS,Chennai]

Hi all,    

 

I want to know how to transfer the control from Uboot to Linux Kernel. I
am using MPC5200B powerpc and ICECUBE board.

Where exactly the Linux Kernel should be loaded?

 

In cmd_bootm.c file,

 

U_BOOT_CMD(

            bootm,  CFG_MAXARGS,           1,         do_bootm,

            "bootm   - boot application image from memory\n",

            "[addr [arg ...]]\n    - boot application image stored in
memory\n"

            "\tpassing arguments 'arg ...'; when booting a Linux
kernel,\n"

            "\t'arg' can be the address of an initrd image\n"

#ifdef CONFIG_OF_FLAT_TREE

            "\tWhen booting a Linux kernel which requires a flat
device-tree\n"

            "\ta third argument is required which is the address of the
of the\n"

            "\tdevice-tree blob. To boot that kernel without an initrd
image,\n"

            "\tuse a '-' for the second argument. If you do not pass a
third\n"

            "\ta bd_info struct will be passed instead\n"

#endif

);

 

What do these lines signify? 

 

For what U_BOOT_CMD is used? I have read the source code fully. 

Please get me some idea.

 

 

 

 

 

 

Regards,

Yasotha Balan R



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