CODEWITHSUNDEEP
embedded-linuxbootbootloaderu-boot
gavenant
gavenant

Reputation: 473

U-boot Standalone Application at Startup

Is it possible to include standalone applications/startup scripts in the u-boot bootup process, and what is the available hooks?

So far I can see from the hello_world example how to compile a standalone application in C, but it still needs to be loaded manually through tftp which I don't want to do.

EDIT: I have found several "hooks" listed in common.h such as 

last_stage_init()
board_late_init()

Where can I find an idea of the proper workflow to add an application to make adjustments to the environment variables?

Upvotes: 0

Views: 1525

Answers (2)

gavenant
gavenant

Reputation: 473

I wanted to use a u-boot startup script but did not know how to proceed and wrongfully used the term application.

I now use the hooks specified in board_r.c, for example misc_init_r() and last_stage_init() where I put my startup scripts required before boot.

Just remember to enable these functions with #define CONFIG_LAST_STAGE_INIT and #define CONFIG_MISC_INIT_R()

Upvotes: 0

Tom Rini
Tom Rini

Reputation: 2173

The basic answer here is that you can have whatever you want run in the CONFIG_BOOTCOMMAND variable and that in turn can load and 'go' your application from wherever you have stored it on the device.

Upvotes: 1

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