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2000-07-19
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161 lines
------------------------------------------------------------------------------
-- --
-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- I N T E R F A C E S . V X W O R K S --
-- --
-- S p e c --
-- --
-- $Revision: 1.1 $
-- --
-- Copyright (C) 1999 Ada Core Technologies, 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 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 package provides a limited binding to the VxWorks API
-- In particular, it interfaces with the VxWorks hardware interrupt facilities
-- For a complete documentation on these operations, please consult your
-- VxWorks Reference Manual.
with Interfaces.C;
with System;
package Interfaces.VxWorks is
pragma Preelaborate (VxWorks);
------------------------------------------------------------------------
-- Here is a complete example that shows how to handle the Interrupt 18
-- in Ada using this package:
-- with Interfaces.VxWorks; use Interfaces.VxWorks;
-- with System;
--
-- package P is
--
-- Count : Integer;
-- pragma Atomic (Count);
--
-- Level : constant := 1;
-- -- Interrupt level used by this example
--
-- procedure Handler (parameter : System.Address);
--
-- end P;
--
-- package body P is
--
-- procedure Handler (parameter : System.Address) is
-- S : STATUS;
-- begin
-- Count := Count + 1;
-- logMsg ("received an interrupt" & ASCII.LF & ASCII.Nul);
-- S := sysBusIntAck (intLevel => Level);
-- end Handler;
-- end P;
--
-- with Interfaces.VxWorks; use Interfaces.VxWorks;
-- with Ada.Text_IO; use Ada.Text_IO;
--
-- with P; use P;
-- procedure Useint is
-- Interrupt : constant := 18;
--
-- task T;
--
-- S : STATUS;
--
-- task body T is
-- begin
-- loop
-- Put_Line ("Generating an interrupt...");
-- delay 1.0;
-- S := sysBusIntGen (1, INUM_TO_IVEC (Interrupt));
-- end loop;
-- end T;
--
-- begin
-- S := sysIntEnable (intLevel => Level);
-- S := intConnect (INUM_TO_IVEC (Interrupt), handler'Access);
--
-- loop
-- delay 2.0;
-- Put_Line ("value of count:" & P.Count'Img);
-- end loop;
-- end Useint;
-------------------------------------
package IC renames Interfaces.C;
subtype int is IC.int;
type STATUS is new int;
-- Equivalent of the C type STATUS
OK : constant STATUS := 0;
ERROR : constant STATUS := -1;
type VOIDFUNCPTR is access procedure (parameter : System.Address);
type Interrupt_Vector is new System.Address;
type Exception_Vector is new System.Address;
function intConnect
(vector : Interrupt_Vector;
handler : VOIDFUNCPTR;
parameter : System.Address := System.Null_Address) return STATUS;
-- Binding to the C routine intConnect.
function INUM_TO_IVEC (intNum : int) return Interrupt_Vector;
-- Equivalent to the C macro INUM_TO_IVEC used to convert an interrupt
-- number to an interrupt vector
function sysIntEnable (intLevel : int) return STATUS;
-- Binding to the C routine sysIntEnable
function sysIntDisable (intLevel : int) return STATUS;
-- Binding to the C routine sysIntDisable
function sysBusIntAck (intLevel : int) return STATUS;
-- Binding to the C routine sysBusIntAck
function sysBusIntGen (intLevel : int; vector : Interrupt_Vector)
return STATUS;
-- Binding to the C routine sysBusIntGen
procedure logMsg
(fmt : String; arg1, arg2, arg3, arg4, arg5, arg6 : int := 0);
-- Binding to the C routine logMsg. Note that it is the caller
-- responsibility to ensure that fmt is a null terminated string
-- (e.g logMsg ("Interrupt" & ASCII.Nul))
private
pragma Import (C, intConnect, "intConnect");
pragma Import (C, INUM_TO_IVEC, "__gnat_inum_to_ivec");
pragma Import (C, sysIntEnable, "sysIntEnable");
pragma Import (C, sysIntDisable, "sysIntDisable");
pragma Import (C, sysBusIntAck, "sysBusIntAck");
pragma Import (C, sysBusIntGen, "sysBusIntGen");
pragma Import (C, logMsg, "logMsg");
end Interfaces.VxWorks;