gcc/ada/libgnat/system-vxworks7-aarch64.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                        GNAT RUN-TIME COMPONENTS                          --
   4 --                                                                          --
   5 --                               S Y S T E M                                --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                      (VxWorks 7.x AARCH64 Kernel)                        --
   9 --                                                                          --
  10 --          Copyright (C) 1992-2024, Free Software Foundation, Inc.         --
  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- --
  18 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  19 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  20 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  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/>.                                          --
  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
  37 --  This is the VxWorks 7.x version of this package for AARCH64 Kernel
  38
  39 package System is
  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).
  44
  45    pragma No_Elaboration_Code_All;
  46    --  Allow the use of that restriction in units that WITH this unit
  47
  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 := -2 ** (Standard'Max_Integer_Size - 1);
  54    Max_Int             : constant :=  2 ** (Standard'Max_Integer_Size - 1) - 1;
  55
  56    Max_Binary_Modulus    : constant := 2 ** Standard'Max_Integer_Size;
  57    Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
  58
  59    Max_Base_Digits       : constant := Long_Long_Float'Digits;
  60    Max_Digits            : constant := Long_Long_Float'Digits;
  61
  62    Max_Mantissa          : constant := Standard'Max_Integer_Size - 1;
  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;
  70    pragma Preelaborable_Initialization (Address);
  71    Null_Address : constant Address;
  72
  73    Storage_Unit : constant := 8;
  74    Word_Size    : constant := Standard'Word_Size;
  75    Memory_Size  : constant := 2 ** Word_Size;
  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);
  94    Default_Bit_Order : constant Bit_Order := Low_Order_First;
  95    pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
  96
  97    --  Priority-related Declarations (RM D.1)
  98
  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
 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    for Address'Size use Standard'Address_Size;
 125
 126    Null_Address : constant Address := 0;
 127
 128    --------------------------------------
 129    -- System Implementation Parameters --
 130    --------------------------------------
 131
 132    --  These parameters provide information about the target that is used
 133    --  by the compiler. They are in the private part of System, where they
 134    --  can be accessed using the special circuitry in the Targparm unit
 135    --  whose source should be consulted for more detailed descriptions
 136    --  of the individual switch values.
 137
 138    Backend_Divide_Checks     : constant Boolean := False;
 139    Backend_Overflow_Checks   : constant Boolean := True;
 140    Command_Line_Args         : constant Boolean := False;
 141    Configurable_Run_Time     : constant Boolean := False;
 142    Denorm                    : constant Boolean := True;
 143    Duration_32_Bits          : constant Boolean := False;
 144    Exit_Status_Supported     : constant Boolean := True;
 145    Machine_Overflows         : constant Boolean := False;
 146    Machine_Rounds            : constant Boolean := True;
 147    Preallocated_Stacks       : constant Boolean := False;
 148    Signed_Zeros              : constant Boolean := True;
 149    Stack_Check_Default       : constant Boolean := False;
 150    Stack_Check_Probes        : constant Boolean := True;
 151    Stack_Check_Limits        : constant Boolean := False;
 152    Support_Aggregates        : constant Boolean := True;
 153    Support_Atomic_Primitives : constant Boolean := True;
 154    Support_Composite_Assign  : constant Boolean := True;
 155    Support_Composite_Compare : constant Boolean := True;
 156    Support_Long_Shifts       : constant Boolean := True;
 157    Always_Compatible_Rep     : constant Boolean := False;
 158    Suppress_Standard_Library : constant Boolean := False;
 159    Use_Ada_Main_Program_Name : constant Boolean := True;
 160    ZCX_By_Default            : constant Boolean := True;
 161
 162    Executable_Extension : constant String := ".out";
 163
 164 end System;