| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA 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 . -- |
| -- O P E R A T I O N S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- $Revision: 1.8 $ -- |
| -- -- |
| -- Copyright (C) 1991-2000 Florida State University -- |
| -- -- |
| -- 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 2, or (at your option) any later ver- -- |
| -- sion. GNARL 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNARL; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. It is -- |
| -- now maintained by Ada Core Technologies Inc. in cooperation with Florida -- |
| -- State University (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is a OpenVMS/Alpha version of this package. |
| |
| with System.OS_Interface; |
| -- used for various type, constant, and operations |
| |
| with System.Tasking; |
| |
| with System.Tasking.Initialization; |
| |
| with System.Task_Primitives.Operations; |
| |
| with System.Task_Primitives.Operations.DEC; |
| |
| with Unchecked_Conversion; |
| |
| package body System.Interrupt_Management.Operations is |
| |
| use System.OS_Interface; |
| use System.Tasking; |
| use type unsigned_short; |
| |
| function To_Address is new Unchecked_Conversion (Task_ID, System.Address); |
| function To_Task_ID is new Unchecked_Conversion (System.Address, Task_ID); |
| package POP renames System.Task_Primitives.Operations; |
| |
| ---------------------------- |
| -- Thread_Block_Interrupt -- |
| ---------------------------- |
| |
| procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID) is |
| begin |
| null; |
| end Thread_Block_Interrupt; |
| |
| ------------------------------ |
| -- Thread_Unblock_Interrupt -- |
| ------------------------------ |
| |
| procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID) is |
| begin |
| null; |
| end Thread_Unblock_Interrupt; |
| |
| ------------------------ |
| -- Set_Interrupt_Mask -- |
| ------------------------ |
| |
| procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask) is |
| begin |
| null; |
| end Set_Interrupt_Mask; |
| |
| procedure Set_Interrupt_Mask |
| (Mask : access Interrupt_Mask; |
| OMask : access Interrupt_Mask) is |
| begin |
| null; |
| end Set_Interrupt_Mask; |
| |
| ------------------------ |
| -- Get_Interrupt_Mask -- |
| ------------------------ |
| |
| procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask) is |
| begin |
| null; |
| end Get_Interrupt_Mask; |
| |
| -------------------- |
| -- Interrupt_Wait -- |
| -------------------- |
| |
| function To_unsigned_long is new |
| Unchecked_Conversion (System.Address, unsigned_long); |
| |
| function Interrupt_Wait (Mask : access Interrupt_Mask) |
| return Interrupt_ID |
| is |
| Self_ID : Task_ID := Self; |
| Iosb : IO_Status_Block_Type := (0, 0, 0); |
| Status : Cond_Value_Type; |
| |
| begin |
| |
| -- A QIO read is registered. The system call returns immediately |
| -- after scheduling an AST to be fired when the operation |
| -- completes. |
| |
| Sys_QIO |
| (Status => Status, |
| Chan => Rcv_Interrupt_Chan, |
| Func => IO_READVBLK, |
| Iosb => Iosb, |
| Astadr => |
| POP.DEC.Interrupt_AST_Handler'Access, |
| Astprm => To_Address (Self_ID), |
| P1 => To_unsigned_long (Interrupt_Mailbox'Address), |
| P2 => Interrupt_ID'Size / 8); |
| |
| pragma Assert ((Status and 1) = 1); |
| |
| loop |
| |
| -- Wait to be woken up. Could be that the AST has fired, |
| -- in which case the Iosb.Status variable will be non-zero, |
| -- or maybe the wait is being aborted. |
| |
| POP.Sleep |
| (Self_ID, |
| System.Tasking.Interrupt_Server_Blocked_On_Event_Flag); |
| |
| if Iosb.Status /= 0 then |
| if (Iosb.Status and 1) = 1 |
| and then Mask (Signal (Interrupt_Mailbox)) |
| then |
| return Interrupt_Mailbox; |
| else |
| return 0; |
| end if; |
| else |
| POP.Unlock (Self_ID); |
| System.Tasking.Initialization.Undefer_Abort (Self_ID); |
| System.Tasking.Initialization.Defer_Abort (Self_ID); |
| POP.Write_Lock (Self_ID); |
| end if; |
| end loop; |
| end Interrupt_Wait; |
| |
| ---------------------------- |
| -- Install_Default_Action -- |
| ---------------------------- |
| |
| procedure Install_Default_Action (Interrupt : Interrupt_ID) is |
| begin |
| null; |
| end Install_Default_Action; |
| |
| --------------------------- |
| -- Install_Ignore_Action -- |
| --------------------------- |
| |
| procedure Install_Ignore_Action (Interrupt : Interrupt_ID) is |
| begin |
| null; |
| end Install_Ignore_Action; |
| |
| ------------------------- |
| -- Fill_Interrupt_Mask -- |
| ------------------------- |
| |
| procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask) is |
| begin |
| Mask.all := (others => True); |
| end Fill_Interrupt_Mask; |
| |
| -------------------------- |
| -- Empty_Interrupt_Mask -- |
| -------------------------- |
| |
| procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask) is |
| begin |
| Mask.all := (others => False); |
| end Empty_Interrupt_Mask; |
| |
| --------------------------- |
| -- Add_To_Interrupt_Mask -- |
| --------------------------- |
| |
| procedure Add_To_Interrupt_Mask |
| (Mask : access Interrupt_Mask; |
| Interrupt : Interrupt_ID) |
| is |
| begin |
| Mask (Signal (Interrupt)) := True; |
| end Add_To_Interrupt_Mask; |
| |
| -------------------------------- |
| -- Delete_From_Interrupt_Mask -- |
| -------------------------------- |
| |
| procedure Delete_From_Interrupt_Mask |
| (Mask : access Interrupt_Mask; |
| Interrupt : Interrupt_ID) |
| is |
| begin |
| Mask (Signal (Interrupt)) := False; |
| end Delete_From_Interrupt_Mask; |
| |
| --------------- |
| -- Is_Member -- |
| --------------- |
| |
| function Is_Member |
| (Mask : access Interrupt_Mask; |
| Interrupt : Interrupt_ID) return Boolean |
| is |
| begin |
| return Mask (Signal (Interrupt)); |
| end Is_Member; |
| |
| ------------------------- |
| -- Copy_Interrupt_Mask -- |
| ------------------------- |
| |
| procedure Copy_Interrupt_Mask |
| (X : out Interrupt_Mask; |
| Y : Interrupt_Mask) |
| is |
| begin |
| X := Y; |
| end Copy_Interrupt_Mask; |
| |
| ------------------------- |
| -- Interrupt_Self_Process -- |
| ------------------------- |
| |
| procedure Interrupt_Self_Process (Interrupt : Interrupt_ID) is |
| Status : Cond_Value_Type; |
| begin |
| Sys_QIO |
| (Status => Status, |
| Chan => Snd_Interrupt_Chan, |
| Func => IO_WRITEVBLK, |
| P1 => To_unsigned_long (Interrupt'Address), |
| P2 => Interrupt_ID'Size / 8); |
| |
| pragma Assert ((Status and 1) = 1); |
| |
| end Interrupt_Self_Process; |
| |
| begin |
| |
| Environment_Mask := (others => False); |
| All_Tasks_Mask := (others => True); |
| |
| for I in Interrupt_ID loop |
| if Keep_Unmasked (I) then |
| Environment_Mask (Signal (I)) := True; |
| All_Tasks_Mask (Signal (I)) := False; |
| end if; |
| end loop; |
| |
| end System.Interrupt_Management.Operations; |
