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db6b51ad | 1 | /* Access to hardware i/o ports. Hurd/x86 version. |
688903eb | 2 | Copyright (C) 2002-2018 Free Software Foundation, Inc. |
db6b51ad RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
db6b51ad RM |
18 | |
19 | #include <sys/io.h> | |
20 | #include <hurd.h> | |
21 | #include <mach/i386/mach_i386.h> | |
22 | ||
23 | int | |
24 | ioperm (unsigned long int from, unsigned long int num, int turn_on) | |
25 | { | |
26 | #if ! HAVE_I386_IO_PERM_MODIFY | |
27 | return __hurd_fail (ENOSYS); | |
28 | #else | |
29 | error_t err; | |
30 | device_t devmaster; | |
31 | ||
32 | /* With the device master port we get a capability that represents | |
33 | this range of io ports. */ | |
34 | err = __get_privileged_ports (NULL, &devmaster); | |
35 | if (! err) | |
36 | { | |
37 | io_perm_t perm; | |
55c303ac | 38 | err = __i386_io_perm_create (devmaster, from, from + num - 1, &perm); |
db6b51ad RM |
39 | __mach_port_deallocate (__mach_task_self (), devmaster); |
40 | if (! err) | |
41 | { | |
42 | /* Now we add or remove that set from our task's bitmap. */ | |
43 | err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on); | |
44 | __mach_port_deallocate (__mach_task_self (), perm); | |
45 | } | |
a3c2e403 RM |
46 | |
47 | if (err == MIG_BAD_ID) /* Old kernels don't have these RPCs. */ | |
48 | err = ENOSYS; | |
db6b51ad RM |
49 | } |
50 | ||
51 | return err ? __hurd_fail (err) : 0; | |
52 | #endif | |
53 | } |