<h2>Edit File - io.h</h2><form method="POST" style="padding:20px">
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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   &lt;http://www.gnu.org/licenses/&gt;.  */

#ifndef	_SYS_IO_H
#define	_SYS_IO_H	1

#include &lt;features.h&gt;

__BEGIN_DECLS

/* If TURN_ON is TRUE, request for permission to do direct i/o on the
   port numbers in the range [FROM,FROM+NUM-1].  Otherwise, turn I/O
   permission off for that range.  This call requires root privileges.

   Portability note: not all Linux platforms support this call.  Most
   platforms based on the PC I/O architecture probably will, however.
   E.g., Linux/Alpha for Alpha PCs supports this.  */
extern int ioperm (unsigned long int __from, unsigned long int __num,
                   int __turn_on) __THROW;

/* Set the I/O privilege level to LEVEL.  If LEVEL&gt;3, permission to
   access any I/O port is granted.  This call requires root
   privileges. */
extern int iopl (int __level) __THROW;

#if defined __GNUC__ &amp;&amp; __GNUC__ &gt;= 2

static __inline unsigned char
inb (unsigned short int __port)
{
  unsigned char _v;

  __asm__ __volatile__ (&quot;inb %w1,%0&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline unsigned char
inb_p (unsigned short int __port)
{
  unsigned char _v;

  __asm__ __volatile__ (&quot;inb %w1,%0\noutb %%al,$0x80&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline unsigned short int
inw (unsigned short int __port)
{
  unsigned short _v;

  __asm__ __volatile__ (&quot;inw %w1,%0&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline unsigned short int
inw_p (unsigned short int __port)
{
  unsigned short int _v;

  __asm__ __volatile__ (&quot;inw %w1,%0\noutb %%al,$0x80&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline unsigned int
inl (unsigned short int __port)
{
  unsigned int _v;

  __asm__ __volatile__ (&quot;inl %w1,%0&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline unsigned int
inl_p (unsigned short int __port)
{
  unsigned int _v;
  __asm__ __volatile__ (&quot;inl %w1,%0\noutb %%al,$0x80&quot;:&quot;=a&quot; (_v):&quot;Nd&quot; (__port));
  return _v;
}

static __inline void
outb (unsigned char __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outb %b0,%w1&quot;: :&quot;a&quot; (__value), &quot;Nd&quot; (__port));
}

static __inline void
outb_p (unsigned char __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outb %b0,%w1\noutb %%al,$0x80&quot;: :&quot;a&quot; (__value),
			&quot;Nd&quot; (__port));
}

static __inline void
outw (unsigned short int __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outw %w0,%w1&quot;: :&quot;a&quot; (__value), &quot;Nd&quot; (__port));

}

static __inline void
outw_p (unsigned short int __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outw %w0,%w1\noutb %%al,$0x80&quot;: :&quot;a&quot; (__value),
			&quot;Nd&quot; (__port));
}

static __inline void
outl (unsigned int __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outl %0,%w1&quot;: :&quot;a&quot; (__value), &quot;Nd&quot; (__port));
}

static __inline void
outl_p (unsigned int __value, unsigned short int __port)
{
  __asm__ __volatile__ (&quot;outl %0,%w1\noutb %%al,$0x80&quot;: :&quot;a&quot; (__value),
			&quot;Nd&quot; (__port));
}

static __inline void
insb (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; insb&quot;:&quot;=D&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

static __inline void
insw (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; insw&quot;:&quot;=D&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

static __inline void
insl (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; insl&quot;:&quot;=D&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

static __inline void
outsb (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; outsb&quot;:&quot;=S&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

static __inline void
outsw (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; outsw&quot;:&quot;=S&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

static __inline void
outsl (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ (&quot;cld ; rep ; outsl&quot;:&quot;=S&quot; (__addr), &quot;=c&quot; (__count)
			:&quot;d&quot; (__port), &quot;0&quot; (__addr), &quot;1&quot; (__count));
}

#endif	/* GNU C */

__END_DECLS
#endif /* _SYS_IO_H */
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