Can I make sure I understand this correctly?
1. By default the 4 USB hardware interrupts (USB_DMAINT, USB_INT2 ... USB_INT0) are mapped via the SIC to IVG10.
2. The USB driver initialization code (InitProcessorSpecificConfiguration() in adi_usb_hdr.c) then effectively chains the 4 interrupt handler functions together and sets up the first in the chain to be invoked when an INT 10 is triggered?
3. The interrupt handler code (_adi_int_NestingISR() in adi_int_asm.asm) appears to each of the chained handlers in turn before returning from the interrupt?
4. So in the case of any USB interrupt all of the following 4 functions are called:
// all in adi_usb_hdr.c
5. Is it possible to establish the origin of the interrupt (i.e. one of the USB_DMAINT, USB_INT2, USB_INT1, USB_INT0) ? i.e. does one of the many registers contain said information or does it have to be inferred from checking USB_INTRUSB, USB_INTRRX, USB_INTRTX, and USB_DMA_INTERRUPT?