freepascal.compiler/rtl/unix/x86.pp

unit x86;

interface

function ReadPortB (Port : Longint): Byte; 
function ReadPortW (Port : Longint): Word; 
function ReadPortL (Port : Longint): Longint;
Procedure ReadPort (Port : Longint; Var Value : Byte);
Procedure ReadPort (Port : Longint; Var Value : Longint);
Procedure ReadPort (Port : Longint; Var Value : Word);
Procedure ReadPortB (Port : Longint; Var Buf; Count: longint);
Procedure ReadPortL (Port : Longint; Var Buf; Count: longint);
Procedure ReadPortW (Port : Longint; Var Buf; Count: longint);
Procedure WritePort (Port : Longint; Value : Byte);
Procedure WritePort (Port : Longint; Value : Longint);
Procedure WritePort (Port : Longint; Value : Word);
Procedure WritePortB (Port : Longint; Value : Byte);
Procedure WritePortB (Port : Longint; Var Buf; Count: longint);
Procedure WritePortL (Port : Longint; Value : Longint);
Procedure WritePortW (Port : Longint; Value : Word);
Procedure WritePortW (Port : Longint; Var Buf; Count: longint);
Procedure WritePortl (Port : Longint; Var Buf; Count: longint);

implementation
{$ASMMODE ATT}

Procedure WritePort (Port : Longint; Value : Byte);
{
  Writes 'Value' to port 'Port'
}
begin
        asm
        movl port,%edx
        movb value,%al
        outb %al,%dx
        end ['EAX','EDX'];
end;

Procedure WritePort (Port : Longint; Value : Word);
{
  Writes 'Value' to port 'Port'
}

begin
        asm
        movl port,%edx
        movw value,%ax
        outw %ax,%dx
        end ['EAX','EDX'];
end;



Procedure WritePort (Port : Longint; Value : Longint);
{
  Writes 'Value' to port 'Port'
}

begin
        asm
        movl port,%edx
        movl value,%eax
        outl %eax,%dx
        end ['EAX','EDX'];
end;


Procedure WritePortB (Port : Longint; Value : Byte);
{
  Writes 'Value' to port 'Port'
}
begin
        asm
        movl port,%edx
        movb value,%al
        outb %al,%dx
        end ['EAX','EDX'];
end;

Procedure WritePortW (Port : Longint; Value : Word);
{
  Writes 'Value' to port 'Port'
}

begin
        asm
        movl port,%edx
        movw value,%ax
        outw %ax,%dx
        end ['EAX','EDX'];
end;



Procedure WritePortL (Port : Longint; Value : Longint);
{
  Writes 'Value' to port 'Port'
}

begin
        asm
        movl port,%edx
        movl value,%eax
        outl %eax,%dx
        end ['EAX','EDX'];
end;



Procedure WritePortl (Port : Longint; Var Buf; Count: longint);
{
  Writes 'Count' longints from 'Buf' to Port
}
begin
  asm
        movl count,%ecx
        movl buf,%esi
        movl port,%edx
        cld
        rep
        outsl
  end ['ECX','ESI','EDX'];
end;



Procedure WritePortW (Port : Longint; Var Buf; Count: longint);
{
  Writes 'Count' words from 'Buf' to Port
}
begin
  asm
        movl count,%ecx
        movl buf,%esi
        movl port,%edx
        cld
        rep
        outsw
  end ['ECX','ESI','EDX'];
end;



Procedure WritePortB (Port : Longint; Var Buf; Count: longint);
{
  Writes 'Count' bytes from 'Buf' to Port
}
begin
  asm
        movl count,%ecx
        movl buf,%esi
        movl port,%edx
        cld
        rep
        outsb
  end ['ECX','ESI','EDX'];
end;



Procedure ReadPort (Port : Longint; Var Value : Byte);
{
  Reads 'Value' from port 'Port'
}
begin
        asm
        movl port,%edx
        inb %dx,%al
        movl value,%edx
        movb %al,(%edx)
        end ['EAX','EDX'];
end;



Procedure ReadPort (Port : Longint; Var Value : Word);
{
  Reads 'Value' from port 'Port'
}
begin
        asm
        movl port,%edx
        inw %dx,%ax
        movl value,%edx
        movw %ax,(%edx)
        end ['EAX','EDX'];
end;



Procedure ReadPort (Port : Longint; Var Value : Longint);
{
  Reads 'Value' from port 'Port'
}
begin
        asm
        movl port,%edx
        inl %dx,%eax
        movl value,%edx
        movl %eax,(%edx)
        end ['EAX','EDX'];
end;



function ReadPortB (Port : Longint): Byte; assembler;
{
  Reads a byte from port 'Port'
}

asm
  xorl %eax,%eax
  movl port,%edx
  inb %dx,%al
end ['EAX','EDX'];



function ReadPortW (Port : Longint): Word; assembler;
{
  Reads a word from port 'Port'
}
asm
  xorl %eax,%eax
  movl port,%edx
  inw %dx,%ax
end ['EAX','EDX'];



function ReadPortL (Port : Longint): LongInt; assembler;
{
  Reads a LongInt from port 'Port'
}
asm
  movl port,%edx
  inl %dx,%eax
end ['EAX','EDX'];



Procedure ReadPortL (Port : Longint; Var Buf; Count: longint);
{
  Reads 'Count' longints from port 'Port' to 'Buf'.
}
begin
  asm
        movl count,%ecx
        movl buf,%edi
        movl port,%edx
        cld
        rep
        insl
  end ['ECX','EDI','EDX'];
end;



Procedure ReadPortW (Port : Longint; Var Buf; Count: longint);
{
  Reads 'Count' words from port 'Port' to 'Buf'.
}
begin
  asm
        movl count,%ecx
        movl buf,%edi
        movl port,%edx
        cld
        rep
        insw
  end ['ECX','EDI','EDX'];
end;

Procedure ReadPortB (Port : Longint; Var Buf; Count: longint);
{
  Reads 'Count' bytes from port 'Port' to 'Buf'.
}
begin
  asm
        movl count,%ecx
        movl buf,%edi
        movl port,%edx
        cld
        rep
        insb
  end ['ECX','EDI','EDX'];
end;

end.