Hello!

L.Wegener schrieb:

will nested interrupts be managed by u-boot or µP-core?

Plain U-Boot doesn't use any interrupts, although there are files like cpu/<arch>/<subarch>/interrupts.c which contain some timer handling functions.

But nevertheless you can implement your own interrupt handling while being quite sure that no standard drivers or functions from U-Boot will cause conflicts.

If you want to push such an interrupt based functionality to the mainstream U-Boot, this will probably not be acceptable, unless you have extraordinary good arguments why interrupts are required.

With best regards Andreas Schweigstill

PS.: If you need some consultancy services for U-Boot, Linux or other embedded device development, don't hesitate to contact me directly. ;-)