| 1 | /* Access to hardware i/o ports. Hurd/x86 version. |
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| 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sys/io.h> |
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| 20 | #include <hurd.h> |
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| 21 | #include <mach/i386/mach_i386.h> |
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| 22 | |
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| 23 | int |
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| 24 | ioperm (unsigned long int from, unsigned long int num, int turn_on) |
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| 25 | { |
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| 26 | #if ! HAVE_I386_IO_PERM_MODIFY |
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| 27 | return __hurd_fail (ENOSYS); |
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| 28 | #else |
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| 29 | error_t err; |
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| 30 | device_t devmaster; |
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| 31 | |
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| 32 | /* With the device master port we get a capability that represents |
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| 33 | this range of io ports. */ |
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| 34 | err = __get_privileged_ports (NULL, &devmaster); |
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| 35 | if (! err) |
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| 36 | { |
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| 37 | io_perm_t perm; |
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| 38 | err = __i386_io_perm_create (devmaster, from, from + num - 1, &perm); |
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| 39 | __mach_port_deallocate (__mach_task_self (), devmaster); |
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| 40 | if (! err) |
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| 41 | { |
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| 42 | /* Now we add or remove that set from our task's bitmap. */ |
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| 43 | err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on); |
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| 44 | __mach_port_deallocate (__mach_task_self (), perm); |
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| 45 | } |
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| 46 | |
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| 47 | if (err == MIG_BAD_ID) /* Old kernels don't have these RPCs. */ |
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| 48 | err = ENOSYS; |
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| 49 | } |
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| 50 | |
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| 51 | return err ? __hurd_fail (err) : 0; |
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| 52 | #endif |
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| 53 | } |
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| 54 | |
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