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/* Access to hardware i/o ports. Hurd/x86 version.
Copyright (C) 2002-2017 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
}
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