File : s-macres-prep.adb


   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                   S Y S T E M .  M A C H I N E _ R E S E T               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --            Copyright (C) 2011-2016, Free Software Foundation, Inc.       --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 --                                                                          --
  19 --                                                                          --
  20 --                                                                          --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31 
  32 with System.IOPorts; use System.IOPorts;
  33 
  34 package body System.Machine_Reset is
  35    procedure OS_Exit;
  36    pragma Export (Ada, OS_Exit, "_exit");
  37    pragma No_Return (OS_Exit);
  38    --  Reset the board or shut-down the simulator
  39 
  40    procedure OS_Abort;
  41    pragma Export (Ada, OS_Abort, "abort");
  42    pragma No_Return (OS_Abort);
  43    --  Same as OS_Exit (rename in body to allow multiple pragma Export)
  44 
  45    --------------
  46    -- OS_Abort --
  47    --------------
  48 
  49    procedure OS_Abort renames OS_Exit;
  50 
  51    -------------
  52    -- OS_Exit --
  53    -------------
  54 
  55    procedure OS_Exit is
  56    begin
  57       --  Trigger a reset
  58 
  59       Outb (16#92#, 0);
  60       Outb (16#92#, 1);
  61 
  62       --  Make sure we don't return before reset takes effect
  63 
  64       loop
  65          null;
  66       end loop;
  67    end OS_Exit;
  68 
  69    ----------
  70    -- Stop --
  71    ----------
  72 
  73    procedure Stop renames OS_Exit;
  74 end System.Machine_Reset;