gcc/ada/system-vxworks-sparcv9.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                        GNAT RUN-TIME COMPONENTS                          --
   4 --                                                                          --
   5 --                               S Y S T E M                                --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                       (VxWorks Version Sparc/64)                         --
   9 --                                                                          --
  10 --          Copyright (C) 1992-2011, 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 package System is
  38    pragma Pure;
  39    --  Note that we take advantage of the implementation permission to make
  40    --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
  41    --  2005, this is Pure in any case (AI-362).
  42
  43    type Name is (SYSTEM_NAME_GNAT);
  44    System_Name : constant Name := SYSTEM_NAME_GNAT;
  45
  46    --  System-Dependent Named Numbers
  47
  48    Min_Int               : constant := Long_Long_Integer'First;
  49    Max_Int               : constant := Long_Long_Integer'Last;
  50
  51    Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
  52    Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
  53
  54    Max_Base_Digits       : constant := Long_Long_Float'Digits;
  55    Max_Digits            : constant := Long_Long_Float'Digits;
  56
  57    Max_Mantissa          : constant := 63;
  58    Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
  59
  60    Tick                  : constant := 1.0 / 60.0;
  61
  62    --  Storage-related Declarations
  63
  64    --  VxWorks for UltraSparc uses 64bit words but 32bit pointers
  65
  66    type Address is private;
  67    pragma Preelaborable_Initialization (Address);
  68    Null_Address : constant Address;
  69
  70    Storage_Unit : constant := 8;
  71    Word_Size    : constant := 64;
  72    Memory_Size  : constant := 2 ** 32;
  73
  74    --  Address comparison
  75
  76    function "<"  (Left, Right : Address) return Boolean;
  77    function "<=" (Left, Right : Address) return Boolean;
  78    function ">"  (Left, Right : Address) return Boolean;
  79    function ">=" (Left, Right : Address) return Boolean;
  80    function "="  (Left, Right : Address) return Boolean;
  81
  82    pragma Import (Intrinsic, "<");
  83    pragma Import (Intrinsic, "<=");
  84    pragma Import (Intrinsic, ">");
  85    pragma Import (Intrinsic, ">=");
  86    pragma Import (Intrinsic, "=");
  87
  88    --  Other System-Dependent Declarations
  89
  90    type Bit_Order is (High_Order_First, Low_Order_First);
  91    Default_Bit_Order : constant Bit_Order := High_Order_First;
  92    pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
  93
  94    --  Priority-related Declarations (RM D.1)
  95
  96    --  Ada priorities are mapped to VxWorks priorities using the following
  97    --  transformation: 255 - Ada Priority
  98
  99    --  Ada priorities are used as follows:
 100
 101    --  256        is reserved for the VxWorks kernel
 102    --  248 - 255  correspond to hardware interrupt levels 0 .. 7
 103    --  247        is a catchall default "interrupt" priority for signals,
 104    --             allowing higher priority than normal tasks, but lower than
 105    --             hardware priority levels.  Protected Object ceilings can
 106    --             override these values.
 107    --  246        is used by the Interrupt_Manager task
 108
 109    Max_Priority           : constant Positive := 245;
 110    Max_Interrupt_Priority : constant Positive := 255;
 111
 112    subtype Any_Priority       is Integer      range   0 .. 255;
 113    subtype Priority           is Any_Priority range   0 .. 245;
 114    subtype Interrupt_Priority is Any_Priority range 246 .. 255;
 115
 116    Default_Priority : constant Priority := 122;
 117
 118 private
 119
 120    type Address is mod Memory_Size;
 121    Null_Address : constant Address := 0;
 122
 123    --------------------------------------
 124    -- System Implementation Parameters --
 125    --------------------------------------
 126
 127    --  These parameters provide information about the target that is used
 128    --  by the compiler. They are in the private part of System, where they
 129    --  can be accessed using the special circuitry in the Targparm unit
 130    --  whose source should be consulted for more detailed descriptions
 131    --  of the individual switch values.
 132
 133    Backend_Divide_Checks     : constant Boolean := False;
 134    Backend_Overflow_Checks   : constant Boolean := True;
 135    Command_Line_Args         : constant Boolean := False;
 136    Configurable_Run_Time     : constant Boolean := False;
 137    Denorm                    : constant Boolean := True;
 138    Duration_32_Bits          : constant Boolean := False;
 139    Exit_Status_Supported     : constant Boolean := True;
 140    Fractional_Fixed_Ops      : constant Boolean := False;
 141    Frontend_Layout           : constant Boolean := False;
 142    Machine_Overflows         : constant Boolean := False;
 143    Machine_Rounds            : constant Boolean := True;
 144    Preallocated_Stacks       : constant Boolean := False;
 145    Signed_Zeros              : constant Boolean := True;
 146    Stack_Check_Default       : constant Boolean := False;
 147    Stack_Check_Probes        : constant Boolean := False;
 148    Stack_Check_Limits        : constant Boolean := True;
 149    Support_Aggregates        : constant Boolean := True;
 150    Support_Composite_Assign  : constant Boolean := True;
 151    Support_Composite_Compare : constant Boolean := True;
 152    Support_Long_Shifts       : constant Boolean := True;
 153    Always_Compatible_Rep     : constant Boolean := False;
 154    Suppress_Standard_Library : constant Boolean := False;
 155    Use_Ada_Main_Program_Name : constant Boolean := True;
 156    ZCX_By_Default            : constant Boolean := False;
 157
 158 end System;