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|
-- SPDX-License-Identifier: BSD-2-Clause
-- RTEMS / Body
--
-- DESCRIPTION:
--
-- This package provides the interface to the RTEMS API.
--
--
-- DEPENDENCIES:
--
--
--
-- COPYRIGHT (c) 1997-2011.
-- On-Line Applications Research Corporation (OAR).
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
--
with Ada;
with Ada.Unchecked_Conversion;
with Interfaces; use Interfaces;
with Interfaces.C; use Interfaces.C;
package body RTEMS is
--
-- Utility Functions
--
function From_Ada_Boolean
(Ada_Boolean : Standard.Boolean)
return RTEMS.Boolean
is
begin
if Ada_Boolean then
return RTEMS.True;
end if;
return RTEMS.False;
end From_Ada_Boolean;
function To_Ada_Boolean
(RTEMS_Boolean : RTEMS.Boolean)
return Standard.Boolean
is
begin
if RTEMS_Boolean = RTEMS.True then
return Standard.True;
end if;
return Standard.False;
end To_Ada_Boolean;
function Milliseconds_To_Microseconds
(Milliseconds : RTEMS.Unsigned32)
return RTEMS.Unsigned32
is
begin
return Milliseconds * 1000;
end Milliseconds_To_Microseconds;
function Microseconds_To_Ticks
(Microseconds : RTEMS.Unsigned32)
return RTEMS.Interval
is
function Microseconds_Per_Tick return RTEMS.Unsigned32;
pragma Import (C, Microseconds_Per_Tick, "_ada_microseconds_per_tick");
begin
return Microseconds / Microseconds_Per_Tick;
end Microseconds_To_Ticks;
function Milliseconds_To_Ticks
(Milliseconds : RTEMS.Unsigned32)
return RTEMS.Interval
is
begin
return Microseconds_To_Ticks
(Milliseconds_To_Microseconds (Milliseconds));
end Milliseconds_To_Ticks;
procedure Name_To_Characters
(Name : in RTEMS.Name;
C1 : out Character;
C2 : out Character;
C3 : out Character;
C4 : out Character)
is
C1_Value : RTEMS.Unsigned32;
C2_Value : RTEMS.Unsigned32;
C3_Value : RTEMS.Unsigned32;
C4_Value : RTEMS.Unsigned32;
begin
C1_Value := Interfaces.Shift_Right (Name, 24);
C2_Value := Interfaces.Shift_Right (Name, 16);
C3_Value := Interfaces.Shift_Right (Name, 8);
C4_Value := Name;
C1_Value := C1_Value and 16#00FF#;
C2_Value := C2_Value and 16#00FF#;
C3_Value := C3_Value and 16#00FF#;
C4_Value := C4_Value and 16#00FF#;
C1 := Character'Val (C1_Value);
C2 := Character'Val (C2_Value);
C3 := Character'Val (C3_Value);
C4 := Character'Val (C4_Value);
end Name_To_Characters;
function Get_Node (ID : in RTEMS.ID) return RTEMS.Unsigned32 is
begin
-- May not be right
return Interfaces.Shift_Right (ID, 16);
end Get_Node;
function Get_Index (ID : in RTEMS.ID) return RTEMS.Unsigned32 is
begin
-- May not be right
return ID and 16#FFFF#;
end Get_Index;
function Are_Statuses_Equal
(Status : in RTEMS.Status_Codes;
Desired : in RTEMS.Status_Codes)
return Standard.Boolean
is
begin
if Status = Desired then
return Standard.True;
end if;
return Standard.False;
end Are_Statuses_Equal;
function Is_Status_Successful
(Status : in RTEMS.Status_Codes)
return Standard.Boolean
is
begin
if Status = RTEMS.Successful then
return Standard.True;
end if;
return Standard.False;
end Is_Status_Successful;
function Subtract
(Left : in RTEMS.Address;
Right : in RTEMS.Address)
return RTEMS.Unsigned32
is
function To_Unsigned32 is new Ada.Unchecked_Conversion (
System.Address,
RTEMS.Unsigned32);
begin
return To_Unsigned32 (Left) - To_Unsigned32 (Right);
end Subtract;
function Are_Equal
(Left : in RTEMS.Address;
Right : in RTEMS.Address)
return Standard.Boolean
is
function To_Unsigned32 is new Ada.Unchecked_Conversion (
System.Address,
RTEMS.Unsigned32);
begin
return (To_Unsigned32 (Left) = To_Unsigned32 (Right));
end Are_Equal;
--
--
-- RTEMS API
--
function Build_Name (
C1 : in Character;
C2 : in Character;
C3 : in Character;
C4 : in Character
) return RTEMS.Name is
C1_Value : RTEMS.Unsigned32;
C2_Value : RTEMS.Unsigned32;
C3_Value : RTEMS.Unsigned32;
C4_Value : RTEMS.Unsigned32;
begin
C1_Value := Character'Pos( C1 );
C2_Value := Character'Pos( C2 );
C3_Value := Character'Pos( C3 );
C4_Value := Character'Pos( C4 );
return Interfaces.Shift_Left( C1_Value, 24 ) or
Interfaces.Shift_Left( C2_Value, 16 ) or
Interfaces.Shift_Left( C3_Value, 8 ) or
C4_Value;
end Build_Name;
--
-- Initialization Manager -- Shutdown Only
--
procedure Shutdown_Executive (Status : in RTEMS.Unsigned32) is
procedure Shutdown_Executive_Base (Status : RTEMS.Unsigned32);
pragma Import (C, Shutdown_Executive_Base, "rtems_shutdown_executive");
begin
Shutdown_Executive_Base (Status);
end Shutdown_Executive;
function Minimum_Stack_Size return RTEMS.Size is
size : RTEMS.Unsigned32;
pragma Import (C, size, "rtems_minimum_stack_size");
begin
return RTEMS.Size (size);
end Minimum_Stack_Size;
end RTEMS;
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