1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M -- 6-- -- 7-- S p e c -- 8-- (LSH Version) -- 9-- -- 10-- Copyright (C) 1992-2014, 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 37pragma Restrictions (No_Exception_Registration); 38 39pragma Restrictions (No_Implicit_Dynamic_Code); 40pragma Restrictions (No_Finalization); 41pragma Restrictions (No_Tasking); 42 43package System is 44 pragma Pure; 45 -- Note that we take advantage of the implementation permission to make 46 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada 47 -- 2005, this is Pure in any case (AI-362). 48 49 pragma No_Elaboration_Code_All; 50 -- Allow the use of that restriction in units that WITH this unit 51 52 type Name is (SYSTEM_NAME_GNAT); 53 System_Name : constant Name := SYSTEM_NAME_GNAT; 54 55 -- System-Dependent Named Numbers 56 57 Min_Int : constant := Long_Long_Integer'First; 58 Max_Int : constant := Long_Long_Integer'Last; 59 60 Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size; 61 Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1; 62 63 Max_Base_Digits : constant := Long_Long_Float'Digits; 64 Max_Digits : constant := Long_Long_Float'Digits; 65 66 Max_Mantissa : constant := 63; 67 Fine_Delta : constant := 2.0 ** (-Max_Mantissa); 68 69 Tick : constant := 0.01; 70 71 -- Storage-related Declarations 72 73 type Address is private; 74 -- Note that we do NOT add pragma Preelaborable_Initialization in this 75 -- version of System, since it is used for the compiler only, and typical 76 -- earlier bootstrap compilers don't support this pragma. We don't need 77 -- it in this context, so there is no problem in omitting it. 78 Null_Address : constant Address; 79 80 Storage_Unit : constant := Standard'Storage_Unit; 81 Word_Size : constant := Standard'Word_Size; 82 Memory_Size : constant := 2 ** Standard'Address_Size; 83 84 -- Address comparison 85 86 function "<" (Left, Right : Address) return Boolean; 87 function "<=" (Left, Right : Address) return Boolean; 88 function ">" (Left, Right : Address) return Boolean; 89 function ">=" (Left, Right : Address) return Boolean; 90 function "=" (Left, Right : Address) return Boolean; 91 92 pragma Import (Intrinsic, "<"); 93 pragma Import (Intrinsic, "<="); 94 pragma Import (Intrinsic, ">"); 95 pragma Import (Intrinsic, ">="); 96 pragma Import (Intrinsic, "="); 97 98 -- Other System-Dependent Declarations 99 100 type Bit_Order is (High_Order_First, Low_Order_First); 101 Default_Bit_Order : constant Bit_Order := 102 Bit_Order'Val (Standard'Default_Bit_Order); 103 pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning 104 105 -- Priority-related Declarations (RM D.1) 106 107 Max_Priority : constant Positive := 30; 108 Max_Interrupt_Priority : constant Positive := 31; 109 110 subtype Any_Priority is Integer range 0 .. 31; 111 subtype Priority is Any_Priority range 0 .. 30; 112 subtype Interrupt_Priority is Any_Priority range 31 .. 31; 113 114 Default_Priority : constant Priority := 15; 115 116private 117 118 Run_Time_Name : constant String := "coreboot Zero Footprint Run Time"; 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 by 128 -- the compiler. They are in the private part of System, where they can be 129 -- accessed using the special circuitry in the Targparm unit whose source 130 -- should be consulted for more detailed descriptions of the individual 131 -- switch values. 132 133 -- This version of system.ads is used only for building the compiler. 134 -- We really ought to use the proper target system (i.e. the one that 135 -- corresponds to the host for the compiler), but that causes as yet 136 -- unsolved makefile problems. For the most part the setting of these 137 -- parameters is not too critical for the compiler version (e.g. we 138 -- do not use floating-point anyway in the compiler). 139 140 AAMP : constant Boolean := False; 141 Backend_Divide_Checks : constant Boolean := False; 142 Backend_Overflow_Checks : constant Boolean := True; 143 Command_Line_Args : constant Boolean := False; 144 Configurable_Run_Time : constant Boolean := True; 145 Denorm : constant Boolean := True; 146 Duration_32_Bits : constant Boolean := False; 147 Exit_Status_Supported : constant Boolean := False; 148 Fractional_Fixed_Ops : constant Boolean := False; 149 Frontend_Layout : constant Boolean := False; 150 Machine_Overflows : constant Boolean := False; 151 Machine_Rounds : constant Boolean := True; 152 Preallocated_Stacks : constant Boolean := False; 153 Signed_Zeros : constant Boolean := True; 154 Stack_Check_Default : constant Boolean := False; 155 Stack_Check_Probes : constant Boolean := False; 156 Stack_Check_Limits : constant Boolean := False; 157 Support_Aggregates : constant Boolean := True; 158 Support_Composite_Assign : constant Boolean := True; 159 Support_Composite_Compare : constant Boolean := True; 160 Support_Long_Shifts : constant Boolean := True; 161 Always_Compatible_Rep : constant Boolean := True; 162 Suppress_Standard_Library : constant Boolean := True; 163 Use_Ada_Main_Program_Name : constant Boolean := False; 164 ZCX_By_Default : constant Boolean := False; 165 166 -- Obsolete entries, to be removed eventually (bootstrap issues) 167 168 Front_End_ZCX_Support : constant Boolean := False; 169 High_Integrity_Mode : constant Boolean := False; 170 Long_Shifts_Inlined : constant Boolean := True; 171 Functions_Return_By_DSP : constant Boolean := False; 172 Support_64_Bit_Divides : constant Boolean := True; 173 GCC_ZCX_Support : constant Boolean := False; 174 175end System; 176