RTEMS 4.8.1 On-Line Library

Blackfin Specific Information Disabling of Interrupts by RTEMS

RTEMS CPU Architecture Supplement

2.4.2: Disabling of Interrupts by RTEMS

During the execution of directive calls, critical sections of code may be executed. When these sections are encountered, RTEMS disables interrupts to level four (4) 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