RTEMS 4.10.0 On-Line Library

Atmel AVR Specific Information Disabling of Interrupts by RTEMS

RTEMS CPU Architecture Supplement

3.4.2: Disabling of Interrupts by RTEMS

During interrupt disable critical sections, RTEMS disables interrupts to level N (N) before the execution of this section and restores them to the previous level upon completion of the section. RTEMS uses the instructions CLI and STI to enable and disable Interrupts. Emulation, Reset, NMI and Exception Interrupts are never disabled.

RTEMS CPU Architecture Supplement