RTEMS 4.9.3 On-Line Library

Blackfin Specific Information Vectoring of an Interrupt Handler

RTEMS CPU Architecture Supplement

3.4.1: Vectoring of an Interrupt Handler

RTEMS maps levels 0 -15 directly to Blackfins event vectors EVT0 - EVT15. Since EVT0 - EVT6 are core events and it is suggested to use EVT15 and EVT15 for Software interrupts, 7 Interrupts (EVT7-EVT13) are left for periferical use.

When installing an RTEMS interrupt handler RTEMS installs a generic Interrupt Handler which saves some context and enables nested interrupt servicing and then vectors to the users interrupt handler.

RTEMS CPU Architecture Supplement