1 /* Copyright (C) 1996-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
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.
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
;
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
38 extern int iopl (int __level
) __THROW
;
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));
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));
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));
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. */
57 enum __pciconfig_iobase_which
59 IOBASE_HOSE
= 0, /* Return hose index. */
60 IOBASE_SPARSE_MEM
= 1, /* Return physical memory addresses. */
66 extern long pciconfig_iobase(enum __pciconfig_iobase_which __which
,
67 unsigned long int __bus
,
68 unsigned long int __dfn
)
69 __THROW
__attribute__ ((const));
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
;
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
;
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
;
94 #endif /* _SYS_IO_H */