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f7a9f785 | 1 | /* Copyright (C) 1996-2016 Free Software Foundation, Inc. |
7ef923d9 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
7ef923d9 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 12 | Lesser General Public License for more details. |
7ef923d9 | 13 | |
3214b89b | 14 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
11309adf UD |
17 | |
18 | #ifndef _SYS_IO_H | |
19 | ||
20 | #define _SYS_IO_H 1 | |
21 | #include <features.h> | |
22 | ||
23 | __BEGIN_DECLS | |
24 | ||
11309adf UD |
25 | /* If TURN_ON is TRUE, request for permission to do direct i/o on the |
26 | port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O | |
27 | permission off for that range. This call requires root privileges. | |
28 | ||
29 | Portability note: not all Linux platforms support this call. Most | |
30 | platforms based on the PC I/O architecture probably will, however. | |
31 | E.g., Linux/Alpha for Alpha PCs supports this. */ | |
27cd2cbe UD |
32 | extern int ioperm (unsigned long int __from, unsigned long int __num, |
33 | int __turn_on) __THROW; | |
11309adf UD |
34 | |
35 | /* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to | |
36 | access any I/O port is granted. This call requires root | |
37 | privileges. */ | |
27cd2cbe | 38 | extern int iopl (int __level) __THROW; |
11309adf UD |
39 | |
40 | /* Return the physical address of the DENSE I/O memory or NULL if none | |
41 | is available (e.g. on a jensen). */ | |
27cd2cbe UD |
42 | extern unsigned long int _bus_base (void) __THROW __attribute__ ((const)); |
43 | extern unsigned long int bus_base (void) __THROW __attribute__ ((const)); | |
11309adf UD |
44 | |
45 | /* Return the physical address of the SPARSE I/O memory. */ | |
27cd2cbe UD |
46 | extern unsigned long _bus_base_sparse (void) __THROW __attribute__ ((const)); |
47 | extern unsigned long bus_base_sparse (void) __THROW __attribute__ ((const)); | |
11309adf UD |
48 | |
49 | /* Return the HAE shift used by the SPARSE I/O memory. */ | |
27cd2cbe UD |
50 | extern int _hae_shift (void) __THROW __attribute__ ((const)); |
51 | extern int hae_shift (void) __THROW __attribute__ ((const)); | |
11309adf | 52 | |
194b9b3b RH |
53 | /* Previous three are deprecated in favour of the following, which |
54 | knows about multiple PCI "hoses". Provide the PCI bus and dfn | |
55 | numbers just as to pciconfig_read/write. */ | |
56 | ||
57 | enum __pciconfig_iobase_which | |
58 | { | |
59 | IOBASE_HOSE = 0, /* Return hose index. */ | |
60 | IOBASE_SPARSE_MEM = 1, /* Return physical memory addresses. */ | |
61 | IOBASE_DENSE_MEM = 2, | |
62 | IOBASE_SPARSE_IO = 3, | |
63 | IOBASE_DENSE_IO = 4 | |
64 | }; | |
65 | ||
66 | extern long pciconfig_iobase(enum __pciconfig_iobase_which __which, | |
67 | unsigned long int __bus, | |
68 | unsigned long int __dfn) | |
69 | __THROW __attribute__ ((const)); | |
70 | ||
b120ade0 | 71 | /* Access PCI space protected from machine checks. */ |
27cd2cbe UD |
72 | extern int pciconfig_read (unsigned long int __bus, |
73 | unsigned long int __dfn, | |
74 | unsigned long int __off, | |
75 | unsigned long int __len, | |
76 | unsigned char *__buf) __THROW; | |
77 | ||
78 | extern int pciconfig_write (unsigned long int __bus, | |
79 | unsigned long int __dfn, | |
80 | unsigned long int __off, | |
81 | unsigned long int __len, | |
82 | unsigned char *__buf) __THROW; | |
b120ade0 | 83 | |
7ea605ff UD |
84 | /* Userspace declarations. */ |
85 | extern unsigned int inb (unsigned long __port) __THROW; | |
86 | extern unsigned int inw (unsigned long __port) __THROW; | |
87 | extern unsigned int inl (unsigned long __port) __THROW; | |
88 | extern void outb (unsigned char __b, unsigned long __port) __THROW; | |
89 | extern void outw (unsigned short __w, unsigned long __port) __THROW; | |
90 | extern void outl (unsigned int __l, unsigned long __port) __THROW; | |
91 | ||
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92 | __END_DECLS |
93 | ||
94 | #endif /* _SYS_IO_H */ |