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. ;-)