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File io.h

/* 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
   <http://www.gnu.org/licenses/>.  */

#ifndef	_SYS_IO_H
#define	_SYS_IO_H	1

#include <features.h>

__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>3, permission to
   access any I/O port is granted.  This call requires root
   privileges. */
extern int iopl (int __level) __THROW;

#if defined __GNUC__ && __GNUC__ >= 2

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

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

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

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

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

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

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

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

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

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

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

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

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

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

}

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

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

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

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

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

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

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

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

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

#endif	/* GNU C */

__END_DECLS
#endif /* _SYS_IO_H */

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-08-07 11:00:59
..	DIR	-	drwxr-xr-x	2025-10-28 10:57:27
acct.h	text/x-c	3.22 KB	-rw-r--r--	2025-08-05 02:01:07
auxv.h	text/x-c	1.23 KB	-rw-r--r--	2025-08-05 02:01:07
bitypes.h	text/x-c	86 B	-rw-r--r--	2025-08-05 02:01:27
capability.h	text/x-c	7.06 KB	-rw-r--r--	2024-01-10 02:34:46
cdefs.h	text/plain	20.2 KB	-rw-r--r--	2025-08-05 02:01:07
debugreg.h	text/plain	3.49 KB	-rw-r--r--	2025-08-05 02:01:07
dir.h	text/x-c	921 B	-rw-r--r--	2025-08-05 02:01:07
elf.h	text/plain	1023 B	-rw-r--r--	2025-08-05 02:01:07
epoll.h	text/x-c	4.31 KB	-rw-r--r--	2025-08-05 02:01:07
errno.h	text/x-c	19 B	-rw-r--r--	2025-08-05 02:01:05
eventfd.h	text/x-c	1.37 KB	-rw-r--r--	2025-08-05 02:01:07
fanotify.h	text/x-c	1.26 KB	-rw-r--r--	2025-08-05 02:01:07
fcntl.h	text/x-c	19 B	-rw-r--r--	2025-08-05 02:01:07
file.h	text/x-c	1.63 KB	-rw-r--r--	2025-08-05 02:01:07
fsuid.h	text/x-c	1.16 KB	-rw-r--r--	2025-08-05 02:01:07
gmon.h	text/x-c	6.08 KB	-rw-r--r--	2025-08-05 02:01:08
gmon_out.h	text/x-c	2.57 KB	-rw-r--r--	2025-08-05 02:01:08
inotify.h	text/x-c	3.75 KB	-rw-r--r--	2025-08-05 02:01:07
io.h	text/x-c	4.97 KB	-rw-r--r--	2025-08-05 02:01:07
ioctl.h	text/x-c	1.7 KB	-rw-r--r--	2025-08-05 02:01:07
ipc.h	text/x-c	1.43 KB	-rw-r--r--	2025-08-05 02:01:08
kd.h	text/x-c	1.08 KB	-rw-r--r--	2025-08-05 02:01:07
klog.h	text/x-c	1.17 KB	-rw-r--r--	2025-08-05 02:01:07
mman.h	text/x-c	5.42 KB	-rw-r--r--	2025-08-05 02:01:07
mount.h	text/x-c	5.48 KB	-rw-r--r--	2025-08-05 02:01:07
msg.h	text/x-c	2.31 KB	-rw-r--r--	2025-08-05 02:01:08
mtio.h	text/x-c	10.9 KB	-rw-r--r--	2025-08-05 02:01:07
param.h	text/x-c	3.07 KB	-rw-r--r--	2025-08-05 02:01:07
pci.h	text/x-c	922 B	-rw-r--r--	2025-08-05 02:01:07
perm.h	text/x-c	1.1 KB	-rw-r--r--	2025-08-05 02:01:07
personality.h	text/x-c	2.66 KB	-rw-r--r--	2025-08-05 02:01:07
poll.h	text/x-c	2.49 KB	-rw-r--r--	2025-08-05 02:01:07
prctl.h	text/x-c	1.03 KB	-rw-r--r--	2025-08-05 02:01:07
procfs.h	text/x-c	4.87 KB	-rw-r--r--	2025-08-05 02:01:27
profil.h	text/x-c	1.91 KB	-rw-r--r--	2025-08-05 02:01:08
psx_syscall.h	text/x-c	2.77 KB	-rw-r--r--	2024-01-10 02:34:46
ptrace.h	text/x-c	5.85 KB	-rw-r--r--	2025-08-05 02:01:07
queue.h	text/x-c	19.08 KB	-rw-r--r--	2025-08-05 02:01:07
quota.h	text/x-c	5.05 KB	-rw-r--r--	2025-08-05 02:01:07
random.h	text/x-c	1.41 KB	-rw-r--r--	2025-08-05 02:01:05
raw.h	text/x-c	1.15 KB	-rw-r--r--	2025-08-05 02:01:07
reboot.h	text/x-c	1.59 KB	-rw-r--r--	2025-08-05 02:01:07
reg.h	text/plain	1.78 KB	-rw-r--r--	2025-08-05 02:01:07
resource.h	text/x-c	3.56 KB	-rw-r--r--	2025-08-05 02:01:07
sdt-config.h	text/plain	276 B	-rw-r--r--	2023-10-14 01:06:47
sdt.h	text/x-c	21.64 KB	-rw-r--r--	2023-10-14 01:06:47
select.h	text/x-c	4.04 KB	-rw-r--r--	2025-08-05 02:01:07
sem.h	text/x-c	1.99 KB	-rw-r--r--	2025-08-05 02:01:08
sendfile.h	text/x-c	1.76 KB	-rw-r--r--	2025-08-05 02:01:07
shm.h	text/x-c	1.83 KB	-rw-r--r--	2025-08-05 02:01:08
signal.h	text/x-c	20 B	-rw-r--r--	2025-08-05 02:01:04
signalfd.h	text/x-c	1.56 KB	-rw-r--r--	2025-08-05 02:01:07
socket.h	text/x-c	9.96 KB	-rw-r--r--	2025-08-05 02:01:08
socketvar.h	text/x-c	141 B	-rw-r--r--	2025-08-05 02:01:08
soundcard.h	text/x-c	29 B	-rw-r--r--	2025-08-05 02:01:07
stat.h	text/x-c	15.86 KB	-rw-r--r--	2025-08-05 02:01:07
statfs.h	text/x-c	2.04 KB	-rw-r--r--	2025-08-05 02:01:07
statvfs.h	text/x-c	2.75 KB	-rw-r--r--	2025-08-05 02:01:07
swap.h	text/x-c	1.55 KB	-rw-r--r--	2025-08-05 02:01:07
syscall.h	text/x-c	1.3 KB	-rw-r--r--	2025-08-05 02:01:07
sysctl.h	text/x-c	1.96 KB	-rw-r--r--	2025-08-05 02:01:07
sysinfo.h	text/x-c	1.48 KB	-rw-r--r--	2025-08-05 02:01:07
syslog.h	text/x-c	7.52 KB	-rw-r--r--	2025-08-05 02:01:07
sysmacros.h	text/x-c	2.05 KB	-rw-r--r--	2025-08-05 02:01:07
termios.h	text/x-c	74 B	-rw-r--r--	2025-08-05 02:01:07
time.h	text/x-c	6.5 KB	-rw-r--r--	2025-08-05 02:01:07
timeb.h	text/x-c	1.34 KB	-rw-r--r--	2025-08-05 02:01:07
timerfd.h	text/x-c	1.83 KB	-rw-r--r--	2025-08-05 02:01:07
times.h	text/x-c	1.56 KB	-rw-r--r--	2025-08-05 02:01:07
timex.h	text/x-c	2.15 KB	-rw-r--r--	2025-08-05 02:01:07
ttychars.h	text/x-c	2.44 KB	-rw-r--r--	2025-08-05 02:01:07
ttydefaults.h	text/plain	3.48 KB	-rw-r--r--	2025-08-05 02:01:07
types.h	text/x-c	5.58 KB	-rw-r--r--	2025-08-05 02:01:07
ucontext.h	text/x-c	5.7 KB	-rw-r--r--	2025-08-05 02:01:05
uio.h	text/x-c	6.13 KB	-rw-r--r--	2025-08-05 02:01:07
un.h	text/x-c	1.42 KB	-rw-r--r--	2025-08-05 02:01:08
unistd.h	text/x-c	20 B	-rw-r--r--	2025-08-05 02:01:07
user.h	text/x-c	5.08 KB	-rw-r--r--	2025-08-05 02:01:07
utsname.h	text/x-c	2.42 KB	-rw-r--r--	2025-08-05 02:01:07
vfs.h	text/x-c	161 B	-rw-r--r--	2025-08-05 02:01:07
vlimit.h	text/x-c	1.83 KB	-rw-r--r--	2025-08-05 02:01:07
vm86.h	text/x-c	1.17 KB	-rw-r--r--	2025-08-05 02:01:07
vt.h	text/x-c	22 B	-rw-r--r--	2025-08-05 02:01:07
vtimes.h	text/x-c	2.4 KB	-rw-r--r--	2025-08-05 02:01:07
wait.h	text/x-c	5.47 KB	-rw-r--r--	2025-08-05 02:01:07
xattr.h	text/x-c	4.17 KB	-rw-r--r--	2025-08-05 02:01:07

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