| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2022, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNARL is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is the RTEMS version of this package |
| |
| -- It is simpler than other versions because the Ada interrupt handling |
| -- mechanisms are used for hardware interrupts rather than signals. |
| |
| package body System.Interrupt_Management is |
| |
| use System.OS_Interface; |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| function State (Int : Interrupt_ID) return Character; |
| pragma Import (C, State, "__gnat_get_interrupt_state"); |
| -- Get interrupt state. Defined in init.c The input argument is the |
| -- hardware interrupt number, and the result is one of the following: |
| |
| Runtime : constant Character := 'r'; |
| Default : constant Character := 's'; |
| -- 'n' this interrupt not set by any Interrupt_State pragma |
| -- 'u' Interrupt_State pragma set state to User |
| -- 'r' Interrupt_State pragma set state to Runtime |
| -- 's' Interrupt_State pragma set state to System (use "default" |
| -- system handler) |
| |
| ---------------- |
| -- Initialize -- |
| ---------------- |
| |
| Initialized : Boolean := False; |
| -- Set to True once Initialize is called, further calls have no effect |
| |
| procedure Initialize is |
| |
| begin |
| if Initialized then |
| return; |
| end if; |
| |
| Initialized := True; |
| |
| -- Set the signal used to signal an abort to another task as defined in |
| -- System.OS_Interface. |
| |
| Abort_Task_Interrupt := SIGADAABORT; |
| |
| -- Initialize hardware interrupt handling |
| |
| pragma Assert (Reserve = (Interrupt_ID'Range => False)); |
| |
| -- Check all interrupts for state that requires keeping them reserved |
| |
| for J in Interrupt_ID'Range loop |
| if State (J) = Default or else State (J) = Runtime then |
| Reserve (J) := True; |
| end if; |
| end loop; |
| |
| end Initialize; |
| |
| end System.Interrupt_Management; |
