308 lines
9.3 KiB
Ada
308 lines
9.3 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- SYSTEM.INTERRUPT_MANAGEMENT.OPERATIONS --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNARL; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a OpenVMS/Alpha version of this package.
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with System.OS_Interface;
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-- used for various type, constant, and operations
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with System.Aux_DEC;
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-- used for Short_Address
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with System.Parameters;
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with System.Tasking;
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with System.Tasking.Initialization;
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with System.Task_Primitives.Operations;
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with System.Task_Primitives.Operations.DEC;
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with Unchecked_Conversion;
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package body System.Interrupt_Management.Operations is
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use System.OS_Interface;
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use System.Parameters;
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use System.Tasking;
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use type unsigned_short;
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function To_Address is new Unchecked_Conversion (Task_Id, System.Address);
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package POP renames System.Task_Primitives.Operations;
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----------------------------
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-- Thread_Block_Interrupt --
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----------------------------
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procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID) is
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pragma Warnings (Off, Interrupt);
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begin
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null;
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end Thread_Block_Interrupt;
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------------------------------
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-- Thread_Unblock_Interrupt --
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------------------------------
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procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID) is
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pragma Warnings (Off, Interrupt);
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begin
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null;
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end Thread_Unblock_Interrupt;
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------------------------
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-- Set_Interrupt_Mask --
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------------------------
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procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask) is
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pragma Warnings (Off, Mask);
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begin
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null;
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end Set_Interrupt_Mask;
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procedure Set_Interrupt_Mask
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(Mask : access Interrupt_Mask;
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OMask : access Interrupt_Mask)
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is
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pragma Warnings (Off, Mask);
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pragma Warnings (Off, OMask);
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begin
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null;
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end Set_Interrupt_Mask;
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------------------------
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-- Get_Interrupt_Mask --
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------------------------
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procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask) is
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pragma Warnings (Off, Mask);
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begin
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null;
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end Get_Interrupt_Mask;
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--------------------
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-- Interrupt_Wait --
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--------------------
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function To_unsigned_long is new
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Unchecked_Conversion (System.Aux_DEC.Short_Address, unsigned_long);
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function Interrupt_Wait (Mask : access Interrupt_Mask)
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return Interrupt_ID
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is
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Self_ID : constant Task_Id := Self;
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Iosb : IO_Status_Block_Type := (0, 0, 0);
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Status : Cond_Value_Type;
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begin
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-- A QIO read is registered. The system call returns immediately
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-- after scheduling an AST to be fired when the operation
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-- completes.
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Sys_QIO
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(Status => Status,
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Chan => Rcv_Interrupt_Chan,
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Func => IO_READVBLK,
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Iosb => Iosb,
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Astadr =>
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POP.DEC.Interrupt_AST_Handler'Access,
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Astprm => To_Address (Self_ID),
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P1 => To_unsigned_long (Interrupt_Mailbox'Address),
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P2 => Interrupt_ID'Size / 8);
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pragma Assert ((Status and 1) = 1);
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loop
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-- Wait to be woken up. Could be that the AST has fired,
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-- in which case the Iosb.Status variable will be non-zero,
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-- or maybe the wait is being aborted.
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POP.Sleep
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(Self_ID,
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System.Tasking.Interrupt_Server_Blocked_On_Event_Flag);
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if Iosb.Status /= 0 then
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if (Iosb.Status and 1) = 1
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and then Mask (Signal (Interrupt_Mailbox))
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then
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return Interrupt_Mailbox;
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else
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return 0;
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end if;
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else
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POP.Unlock (Self_ID);
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if Single_Lock then
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POP.Unlock_RTS;
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end if;
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System.Tasking.Initialization.Undefer_Abort (Self_ID);
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System.Tasking.Initialization.Defer_Abort (Self_ID);
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if Single_Lock then
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POP.Lock_RTS;
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end if;
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POP.Write_Lock (Self_ID);
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end if;
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end loop;
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end Interrupt_Wait;
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----------------------------
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-- Install_Default_Action --
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----------------------------
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procedure Install_Default_Action (Interrupt : Interrupt_ID) is
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pragma Warnings (Off, Interrupt);
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begin
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null;
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end Install_Default_Action;
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---------------------------
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-- Install_Ignore_Action --
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---------------------------
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procedure Install_Ignore_Action (Interrupt : Interrupt_ID) is
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pragma Warnings (Off, Interrupt);
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begin
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null;
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end Install_Ignore_Action;
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-------------------------
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-- Fill_Interrupt_Mask --
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-------------------------
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procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask) is
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begin
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Mask.all := (others => True);
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end Fill_Interrupt_Mask;
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--------------------------
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-- Empty_Interrupt_Mask --
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--------------------------
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procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask) is
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begin
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Mask.all := (others => False);
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end Empty_Interrupt_Mask;
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---------------------------
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-- Add_To_Interrupt_Mask --
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---------------------------
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procedure Add_To_Interrupt_Mask
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(Mask : access Interrupt_Mask;
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Interrupt : Interrupt_ID)
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is
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begin
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Mask (Signal (Interrupt)) := True;
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end Add_To_Interrupt_Mask;
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--------------------------------
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-- Delete_From_Interrupt_Mask --
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--------------------------------
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procedure Delete_From_Interrupt_Mask
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(Mask : access Interrupt_Mask;
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Interrupt : Interrupt_ID)
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is
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begin
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Mask (Signal (Interrupt)) := False;
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end Delete_From_Interrupt_Mask;
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---------------
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-- Is_Member --
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---------------
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function Is_Member
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(Mask : access Interrupt_Mask;
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Interrupt : Interrupt_ID) return Boolean
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is
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begin
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return Mask (Signal (Interrupt));
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end Is_Member;
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-------------------------
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-- Copy_Interrupt_Mask --
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-------------------------
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procedure Copy_Interrupt_Mask
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(X : out Interrupt_Mask;
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Y : Interrupt_Mask)
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is
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begin
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X := Y;
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end Copy_Interrupt_Mask;
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----------------------------
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-- Interrupt_Self_Process --
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----------------------------
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procedure Interrupt_Self_Process (Interrupt : Interrupt_ID) is
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Status : Cond_Value_Type;
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begin
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Sys_QIO
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(Status => Status,
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Chan => Snd_Interrupt_Chan,
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Func => IO_WRITEVBLK,
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P1 => To_unsigned_long (Interrupt'Address),
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P2 => Interrupt_ID'Size / 8);
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pragma Assert ((Status and 1) = 1);
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end Interrupt_Self_Process;
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--------------------------
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-- Setup_Interrupt_Mask --
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--------------------------
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procedure Setup_Interrupt_Mask is
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begin
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null;
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end Setup_Interrupt_Mask;
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begin
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Interrupt_Management.Initialize;
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Environment_Mask := (others => False);
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All_Tasks_Mask := (others => True);
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for J in Interrupt_ID loop
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if Keep_Unmasked (J) then
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Environment_Mask (Signal (J)) := True;
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All_Tasks_Mask (Signal (J)) := False;
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end if;
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end loop;
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end System.Interrupt_Management.Operations;
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