Add minimal GNAT run time system (RTS)

Add a stripped-down version of libgnat. This is somehow comparable to
libgcc but for Ada programs. It's licensed under GPLv3 but with the
runtime library exception. So it's totally fine to link it with our
GPLv2 code and keep it under GPLv2.

Change-Id: Ie6522abf093f0a516b9ae18ddc69131bd721dc0c
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/11836
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>

1 files changed, 130 insertions, 0 deletions

diff --git a/src/lib/gnat/s-maccod.ads b/src/lib/gnat/s-maccod.ads
new file mode 100644
index 0000000000..a95e319cb9
--- /dev/null
+++ b/src/lib/gnat/s-maccod.ads
@@ -0,0 +1,130 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                   S Y S T E M . M A C H I N E _ C O D E                  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2011, Free Software Foundation, Inc.         --
+--                                                                          --
+-- 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 package provides machine code support, both for intrinsic machine
+--  operations, and also for machine code statements. See GNAT documentation
+--  for full details.
+
+package System.Machine_Code is
+   pragma Pure;
+
+   --  All identifiers in this unit are implementation defined
+
+   pragma Implementation_Defined;
+
+   type Asm_Input_Operand  is private;
+   type Asm_Output_Operand is private;
+   --  These types are never used directly, they are declared only so that
+   --  the calls to Asm are type correct according to Ada semantic rules.
+
+   No_Input_Operands  : constant Asm_Input_Operand;
+   No_Output_Operands : constant Asm_Output_Operand;
+
+   type Asm_Input_Operand_List  is
+     array (Integer range <>) of Asm_Input_Operand;
+
+   type Asm_Output_Operand_List is
+     array (Integer range <>) of Asm_Output_Operand;
+
+   type Asm_Insn is private;
+   --  This type is not used directly. It is declared only so that the
+   --  aggregates used in code statements are type correct by Ada rules.
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand  := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand  := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   pragma Import (Intrinsic, Asm);
+
+private
+
+   type Asm_Input_Operand  is new Integer;
+   type Asm_Output_Operand is new Integer;
+   type Asm_Insn           is new Integer;
+   --  All three of these types are dummy types, to meet the requirements of
+   --  type consistency. No values of these types are ever referenced.
+
+   No_Input_Operands  : constant Asm_Input_Operand  := 0;
+   No_Output_Operands : constant Asm_Output_Operand := 0;
+
+end System.Machine_Code;