[thirdparty/gcc.git] / gcc / ada / libgnat / system-vxworks-ppc-vthread.ads

------------------------------------------------------------------------------
--                                                                          --
--                        GNAT RUN-TIME COMPONENTS                          --
--                                                                          --
--                               S Y S T E M                                --
--                                                                          --
--                                 S p e c                                  --
--                       (VxWorks PPC AE653 vThreads)                       --
--                                                                          --
--          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
--                                                                          --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the  contents of the part following the private keyword. --
--                                                                          --
-- GNAT 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/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  This version is for the AE653 vThreads full run-time

package System is
   pragma Pure;
   --  Note that we take advantage of the implementation permission to make
   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
   --  2005, this is Pure in any case (AI-362).

   pragma No_Elaboration_Code_All;
   --  Allow the use of that restriction in units that WITH this unit

   type Name is (SYSTEM_NAME_GNAT);
   System_Name : constant Name := SYSTEM_NAME_GNAT;

   --  System-Dependent Named Numbers

   Min_Int               : constant := Long_Long_Integer'First;
   Max_Int               : constant := Long_Long_Integer'Last;

   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;

   Max_Base_Digits       : constant := Long_Long_Float'Digits;
   Max_Digits            : constant := Long_Long_Float'Digits;

   Max_Mantissa          : constant := 63;
   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);

   Tick                  : constant := 1.0 / 60.0;

   --  Storage-related Declarations

   type Address is private;
   pragma Preelaborable_Initialization (Address);
   Null_Address : constant Address;

   Storage_Unit : constant := 8;
   Word_Size    : constant := 32;
   Memory_Size  : constant := 2 ** 32;

   --  Address comparison

   function "<"  (Left, Right : Address) return Boolean;
   function "<=" (Left, Right : Address) return Boolean;
   function ">"  (Left, Right : Address) return Boolean;
   function ">=" (Left, Right : Address) return Boolean;
   function "="  (Left, Right : Address) return Boolean;

   pragma Import (Intrinsic, "<");
   pragma Import (Intrinsic, "<=");
   pragma Import (Intrinsic, ">");
   pragma Import (Intrinsic, ">=");
   pragma Import (Intrinsic, "=");

   --  Other System-Dependent Declarations

   type Bit_Order is (High_Order_First, Low_Order_First);
   Default_Bit_Order : constant Bit_Order := High_Order_First;
   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning

   --  Priority-related Declarations (RM D.1)

   --  Ada priorities are mapped to VxWorks priorities using the following
   --  transformation: 255 - Ada Priority

   --  Ada priorities are used as follows:

   --  256        is reserved for the VxWorks kernel
   --  248 - 255  correspond to hardware interrupt levels 0 .. 7
   --  247        is a catchall default "interrupt" priority for signals,
   --             allowing higher priority than normal tasks, but lower than
   --             hardware priority levels.  Protected Object ceilings can
   --             override these values.
   --  246        is used by the Interrupt_Manager task

   Max_Priority           : constant Positive := 245;
   Max_Interrupt_Priority : constant Positive := 255;

   subtype Any_Priority       is Integer      range   0 .. 255;
   subtype Priority           is Any_Priority range   0 .. 245;
   subtype Interrupt_Priority is Any_Priority range 246 .. 255;

   Default_Priority : constant Priority := 122;

private

   type Address is mod Memory_Size;
   Null_Address : constant Address := 0;

   --------------------------------------
   -- System Implementation Parameters --
   --------------------------------------

   --  These parameters provide information about the target that is used
   --  by the compiler. They are in the private part of System, where they
   --  can be accessed using the special circuitry in the Targparm unit
   --  whose source should be consulted for more detailed descriptions
   --  of the individual switch values.

   Backend_Divide_Checks     : constant Boolean := False;
   Backend_Overflow_Checks   : constant Boolean := True;
   Command_Line_Args         : constant Boolean := False;
   Configurable_Run_Time     : constant Boolean := False;
   Denorm                    : constant Boolean := True;
   Duration_32_Bits          : constant Boolean := False;
   Exit_Status_Supported     : constant Boolean := True;
   Fractional_Fixed_Ops      : constant Boolean := False;
   Frontend_Layout           : constant Boolean := False;
   Machine_Overflows         : constant Boolean := True;
   Machine_Rounds            : constant Boolean := True;
   Preallocated_Stacks       : constant Boolean := False;
   Signed_Zeros              : constant Boolean := True;
   Stack_Check_Default       : constant Boolean := False;
   Stack_Check_Probes        : constant Boolean := True;
   Stack_Check_Limits        : constant Boolean := False;
   Support_Aggregates        : constant Boolean := True;
   Support_Composite_Assign  : constant Boolean := True;
   Support_Composite_Compare : constant Boolean := True;
   Support_Long_Shifts       : constant Boolean := True;
   Always_Compatible_Rep     : constant Boolean := False;
   Suppress_Standard_Library : constant Boolean := False;
   Use_Ada_Main_Program_Name : constant Boolean := True;
   Frontend_Exceptions       : constant Boolean := False;
   ZCX_By_Default            : constant Boolean := False;

   Executable_Extension : constant String := ".out";

end System;
Commit	Line	Data
5d09245e AC	1	------------------------------------------------------------------------------
	2	-- --
	3	-- GNAT RUN-TIME COMPONENTS --
	4	-- --
	5	-- S Y S T E M --
	6	-- --
	7	-- S p e c --
edcc77db	8	-- (VxWorks PPC AE653 vThreads) --
5d09245e	9	-- --
4b490c1e	10	-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
5d09245e AC	11	-- --
	12	-- This specification is derived from the Ada Reference Manual for use with --
	13	-- GNAT. The copyright notice above, and the license provisions that follow --
	14	-- apply solely to the contents of the part following the private keyword. --
	15	-- --
	16	-- GNAT is free software; you can redistribute it and/or modify it under --
	17	-- terms of the GNU General Public License as published by the Free Soft- --
748086b7	18	-- ware Foundation; either version 3, or (at your option) any later ver- --
5d09245e AC	19	-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
5d09245e AC	20	-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
748086b7 JJ	21	-- or FITNESS FOR A PARTICULAR PURPOSE. --
	22	-- --
	23	-- As a special exception under Section 7 of GPL version 3, you are granted --
	24	-- additional permissions described in the GCC Runtime Library Exception, --
	25	-- version 3.1, as published by the Free Software Foundation. --
	26	-- --
	27	-- You should have received a copy of the GNU General Public License and --
	28	-- a copy of the GCC Runtime Library Exception along with this program; --
	29	-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
	30	-- <http://www.gnu.org/licenses/>. --
5d09245e AC	31	-- --
	32	-- GNAT was originally developed by the GNAT team at New York University. --
	33	-- Extensive contributions were provided by Ada Core Technologies Inc. --
	34	-- --
	35	------------------------------------------------------------------------------
	36
edcc77db NR	37	-- This version is for the AE653 vThreads full run-time
edcc77db NR	38
5d09245e	39	package System is
009186e0 AC	40	pragma Pure;
	41	-- Note that we take advantage of the implementation permission to make
	42	-- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
	43	-- 2005, this is Pure in any case (AI-362).
5d09245e	44
cd2c6027 AC	45	pragma No_Elaboration_Code_All;
	46	-- Allow the use of that restriction in units that WITH this unit
	47
5d09245e AC	48	type Name is (SYSTEM_NAME_GNAT);
	49	System_Name : constant Name := SYSTEM_NAME_GNAT;
	50
	51	-- System-Dependent Named Numbers
	52
	53	Min_Int : constant := Long_Long_Integer'First;
	54	Max_Int : constant := Long_Long_Integer'Last;
	55
	56	Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size;
a538d226	57	Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
5d09245e AC	58
	59	Max_Base_Digits : constant := Long_Long_Float'Digits;
	60	Max_Digits : constant := Long_Long_Float'Digits;
	61
	62	Max_Mantissa : constant := 63;
	63	Fine_Delta : constant := 2.0 ** (-Max_Mantissa);
	64
	65	Tick : constant := 1.0 / 60.0;
	66
	67	-- Storage-related Declarations
	68
	69	type Address is private;
a538d226	70	pragma Preelaborable_Initialization (Address);
5d09245e AC	71	Null_Address : constant Address;
	72
	73	Storage_Unit : constant := 8;
	74	Word_Size : constant := 32;
	75	Memory_Size : constant := 2 ** 32;
	76
	77	-- Address comparison
	78
	79	function "<" (Left, Right : Address) return Boolean;
	80	function "<=" (Left, Right : Address) return Boolean;
	81	function ">" (Left, Right : Address) return Boolean;
	82	function ">=" (Left, Right : Address) return Boolean;
	83	function "=" (Left, Right : Address) return Boolean;
	84
	85	pragma Import (Intrinsic, "<");
	86	pragma Import (Intrinsic, "<=");
	87	pragma Import (Intrinsic, ">");
	88	pragma Import (Intrinsic, ">=");
	89	pragma Import (Intrinsic, "=");
	90
	91	-- Other System-Dependent Declarations
	92
	93	type Bit_Order is (High_Order_First, Low_Order_First);
edcc77db	94	Default_Bit_Order : constant Bit_Order := High_Order_First;
f28ded01	95	pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
5d09245e AC	96
	97	-- Priority-related Declarations (RM D.1)
	98
a538d226 AC	99	-- Ada priorities are mapped to VxWorks priorities using the following
	100	-- transformation: 255 - Ada Priority
	101
	102	-- Ada priorities are used as follows:
	103
5d09245e AC	104	-- 256 is reserved for the VxWorks kernel
	105	-- 248 - 255 correspond to hardware interrupt levels 0 .. 7
	106	-- 247 is a catchall default "interrupt" priority for signals,
	107	-- allowing higher priority than normal tasks, but lower than
	108	-- hardware priority levels. Protected Object ceilings can
	109	-- override these values.
	110	-- 246 is used by the Interrupt_Manager task
	111
	112	Max_Priority : constant Positive := 245;
	113	Max_Interrupt_Priority : constant Positive := 255;
	114
	115	subtype Any_Priority is Integer range 0 .. 255;
	116	subtype Priority is Any_Priority range 0 .. 245;
	117	subtype Interrupt_Priority is Any_Priority range 246 .. 255;
	118
	119	Default_Priority : constant Priority := 122;
	120
	121	private
	122
	123	type Address is mod Memory_Size;
	124	Null_Address : constant Address := 0;
	125
	126	--------------------------------------
	127	-- System Implementation Parameters --
	128	--------------------------------------
	129
	130	-- These parameters provide information about the target that is used
	131	-- by the compiler. They are in the private part of System, where they
	132	-- can be accessed using the special circuitry in the Targparm unit
	133	-- whose source should be consulted for more detailed descriptions
	134	-- of the individual switch values.
	135
5d09245e	136	Backend_Divide_Checks : constant Boolean := False;
fad0600d	137	Backend_Overflow_Checks : constant Boolean := True;
5d09245e AC	138	Command_Line_Args : constant Boolean := False;
	139	Configurable_Run_Time : constant Boolean := False;
	140	Denorm : constant Boolean := True;
	141	Duration_32_Bits : constant Boolean := False;
	142	Exit_Status_Supported : constant Boolean := True;
	143	Fractional_Fixed_Ops : constant Boolean := False;
	144	Frontend_Layout : constant Boolean := False;
edcc77db	145	Machine_Overflows : constant Boolean := True;
5d09245e	146	Machine_Rounds : constant Boolean := True;
b23e28d5	147	Preallocated_Stacks : constant Boolean := False;
5d09245e AC	148	Signed_Zeros : constant Boolean := True;
5d09245e AC	149	Stack_Check_Default : constant Boolean := False;
3488bd6b EB	150	Stack_Check_Probes : constant Boolean := True;
3488bd6b EB	151	Stack_Check_Limits : constant Boolean := False;
5d09245e AC	152	Support_Aggregates : constant Boolean := True;
	153	Support_Composite_Assign : constant Boolean := True;
	154	Support_Composite_Compare : constant Boolean := True;
	155	Support_Long_Shifts : constant Boolean := True;
01f0729a	156	Always_Compatible_Rep : constant Boolean := False;
5d09245e AC	157	Suppress_Standard_Library : constant Boolean := False;
5d09245e AC	158	Use_Ada_Main_Program_Name : constant Boolean := True;
edcc77db	159	Frontend_Exceptions : constant Boolean := False;
5d09245e	160	ZCX_By_Default : constant Boolean := False;
5d09245e	161
2cc7967f AC	162	Executable_Extension : constant String := ".out";
2cc7967f AC	163
5d09245e	164	end System;