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1 | /* Access to hardware i/o ports. Hurd/x86 version. |
2 | Copyright (C) 2002 Free Software Foundation, Inc. | |
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 | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <sys/io.h> | |
21 | #include <hurd.h> | |
22 | #include <mach/i386/mach_i386.h> | |
23 | ||
24 | int | |
25 | ioperm (unsigned long int from, unsigned long int num, int turn_on) | |
26 | { | |
27 | #if ! HAVE_I386_IO_PERM_MODIFY | |
28 | return __hurd_fail (ENOSYS); | |
29 | #else | |
30 | error_t err; | |
31 | device_t devmaster; | |
32 | ||
33 | /* With the device master port we get a capability that represents | |
34 | this range of io ports. */ | |
35 | err = __get_privileged_ports (NULL, &devmaster); | |
36 | if (! err) | |
37 | { | |
38 | io_perm_t perm; | |
39 | err = __i386_io_perm_create (devmaster, from, from + num, &perm); | |
40 | __mach_port_deallocate (__mach_task_self (), devmaster); | |
41 | if (! err) | |
42 | { | |
43 | /* Now we add or remove that set from our task's bitmap. */ | |
44 | err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on); | |
45 | __mach_port_deallocate (__mach_task_self (), perm); | |
46 | } | |
47 | } | |
48 | ||
49 | return err ? __hurd_fail (err) : 0; | |
50 | #endif | |
51 | } |