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1 | /* Copyright (C) 1996-2024 Free Software Foundation, Inc. |
---|---|
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 |
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. |
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 |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library. If not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #ifndef _SYS_IO_H |
19 | |
20 | #define _SYS_IO_H 1 |
21 | #include <features.h> |
22 | |
23 | __BEGIN_DECLS |
24 | |
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. */ |
32 | extern int ioperm (unsigned long int __from, unsigned long int __num, |
33 | int __turn_on) __THROW; |
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. */ |
38 | extern int iopl (int __level) __THROW; |
39 | |
40 | /* Return the physical address of the DENSE I/O memory or NULL if none |
41 | is available (e.g. on a jensen). */ |
42 | extern unsigned long int _bus_base (void) __THROW __attribute__ ((const)); |
43 | extern unsigned long int bus_base (void) __THROW __attribute__ ((const)); |
44 | |
45 | /* Return the physical address of the SPARSE I/O memory. */ |
46 | extern unsigned long _bus_base_sparse (void) __THROW __attribute__ ((const)); |
47 | extern unsigned long bus_base_sparse (void) __THROW __attribute__ ((const)); |
48 | |
49 | /* Return the HAE shift used by the SPARSE I/O memory. */ |
50 | extern int _hae_shift (void) __THROW __attribute__ ((const)); |
51 | extern int hae_shift (void) __THROW __attribute__ ((const)); |
52 | |
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 | |
71 | /* Access PCI space protected from machine checks. */ |
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; |
83 | |
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 | |
92 | __END_DECLS |
93 | |
94 | #endif /* _SYS_IO_H */ |
95 |
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