/* Access to hardware i/o ports.  Hurd/x86 version.

   Copyright (C) 2002-2018 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/>.  */

#include <sys/io.h>

#include <hurd.h>

#include <mach/i386/mach_i386.h>

int

ioperm (unsigned long int from, unsigned long int num, int turn_on)

{

#if ! HAVE_I386_IO_PERM_MODIFY

  return __hurd_fail (ENOSYS);

#else

  error_t err;

  device_t devmaster;

  /* With the device master port we get a capability that represents

     this range of io ports.  */

  err = __get_privileged_ports (NULL, &devmaster);

  if (! err)

    {

      io_perm_t perm;

      err = __i386_io_perm_create (devmaster, from, from + num - 1, &perm);

      __mach_port_deallocate (__mach_task_self (), devmaster);

      if (! err)

	{

	  /* Now we add or remove that set from our task's bitmap.  */

	  err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on);

	  __mach_port_deallocate (__mach_task_self (), perm);

	}

      if (err == MIG_BAD_ID)	/* Old kernels don't have these RPCs.  */

	err = ENOSYS;

    }

  return err ? __hurd_fail (err) : 0;

#endif

}