| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1998, 1999 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Phil Blundell, based on the Alpha version by |
| 4 | David Mosberger. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #include <sys/io.h> |
| 22 | #include <errno.h> |
| 23 | |
| 24 | |
| 25 | #define MAX_PORT 0x10000 |
| 26 | |
| 27 | int iopl(int level) |
| 28 | { |
| 29 | if (level > 3) { |
| 30 | __set_errno(EINVAL); |
| 31 | return -1; |
| 32 | } |
| 33 | if (level) |
| 34 | return ioperm(0, MAX_PORT, 1); |
| 35 | return 0; |
| 36 | } |