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112 | ------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . T E X T _ I O --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2018, 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. --
-- --
------------------------------------------------------------------------------
-- Minimal version of Text_IO body for use on TMS570 using the ARM Debug
-- Control Channel (DCC)
with System.Machine_Code; use System.Machine_Code;
package body System.Text_IO is
type Word is mod 2**32;
function Read_DCSR return Word;
-- Read status register for debugger communication
---------
-- Get --
---------
function Get return Character is
C : Character;
begin
Asm ("mrc p14, 0, %0, c0, c5",
Outputs => (Character'Asm_Output ("=r", C)),
Volatile => True);
return C;
end Get;
----------------
-- Initialize --
----------------
procedure Initialize is
begin
Initialized := True;
end Initialize;
-----------------
-- Is_Tx_Ready --
-----------------
function Is_Tx_Ready return Boolean is
((Read_DCSR and 2**29) = 0);
-----------------
-- Is_Rx_Ready --
-----------------
function Is_Rx_Ready return Boolean is
((Read_DCSR and 2**30) /= 0);
---------
-- Put --
---------
procedure Put (C : Character) is
begin
Asm ("mcr p14, 0, %0, c0, c5",
Inputs => (Word'Asm_Input ("r", Word (Character'Pos (C)))),
Volatile => True);
end Put;
---------------
-- Read_DCSR --
---------------
function Read_DCSR return Word is
R : Word;
begin
Asm ("mrc p14, 0, %0, c0, c1",
Outputs => (Word'Asm_Output ("=r", R)),
Volatile => True);
return R;
end Read_DCSR;
----------------------------
-- Use_Cr_Lf_For_New_Line --
----------------------------
function Use_Cr_Lf_For_New_Line return Boolean is
begin
return True;
end Use_Cr_Lf_For_New_Line;
end System.Text_IO;
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