73 lines
2.3 KiB
Ada
73 lines
2.3 KiB
Ada
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--
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-- Copyright (C) 2015 secunet Security Networks AG
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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with System;
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with System.Machine_Code;
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package body HW.Port_IO
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with
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Refined_State => (State => null),
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SPARK_Mode => Off
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is
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generic
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type Word is private;
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procedure Port_In (Value : out Word; Port : Port_Type);
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procedure Port_In (Value : out Word; Port : Port_Type) is
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begin
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System.Machine_Code.Asm
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("in %1, %0",
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Inputs => (Port_Type'Asm_Input ("Nd", Port)),
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Outputs => (Word'Asm_Output ("=a", Value)),
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Volatile => True);
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end Port_In;
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procedure InB_Body is new Port_In (Word => Word8);
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procedure InB (Value : out Word8; Port : Port_Type) renames InB_Body;
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procedure InW_Body is new Port_In (Word => Word16);
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procedure InW (Value : out Word16; Port : Port_Type) renames InW_Body;
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procedure InL_Body is new Port_In (Word => Word32);
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procedure InL (Value : out Word32; Port : Port_Type) renames InL_Body;
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----------------------------------------------------------------------------
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generic
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type Word is private;
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procedure Port_Out (Port : Port_Type; Value : Word);
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procedure Port_Out (Port : Port_Type; Value : Word) is
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begin
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System.Machine_Code.Asm
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("out %1, %0",
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Inputs => (Port_Type'Asm_Input ("Nd", Port),
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Word'Asm_Input ("a", Value)),
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Volatile => True);
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end Port_Out;
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procedure OutB_Body is new Port_Out (Word => Word8);
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procedure OutB (Port : Port_Type; Value : Word8) renames OutB_Body;
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procedure OutW_Body is new Port_Out (Word => Word16);
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procedure OutW (Port : Port_Type; Value : Word16) renames OutW_Body;
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procedure OutL_Body is new Port_Out (Word => Word32);
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procedure OutL (Port : Port_Type; Value : Word32) renames OutL_Body;
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end HW.Port_IO;
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-- vim: set ts=8 sts=3 sw=3 et:
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