Hi Alfonso,
In this forum, there were several good posts on this topic, "atomic". I recommend you to use the search option above in this link by giving "atomic" and browse through those threads to check for the answers. Few are listed below.
https://e2e.ti.com/support/dsp/omap_applications_processors/int_omapl1x_dsps/f/116/t/261709.aspx
http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/270760.aspx
http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/110942/396600.aspx#396600
Regards,
Shankari
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