| /* Copyright (C) 1996-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_IO_H |
| |
| #define _SYS_IO_H 1 |
| #include <features.h> |
| |
| __BEGIN_DECLS |
| |
| /* If TURN_ON is TRUE, request for permission to do direct i/o on the |
| port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O |
| permission off for that range. This call requires root privileges. |
| |
| Portability note: not all Linux platforms support this call. Most |
| platforms based on the PC I/O architecture probably will, however. |
| E.g., Linux/Alpha for Alpha PCs supports this. */ |
| extern int ioperm (unsigned long int __from, unsigned long int __num, |
| int __turn_on) __THROW; |
| |
| /* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to |
| access any I/O port is granted. This call requires root |
| privileges. */ |
| extern int iopl (int __level) __THROW; |
| |
| /* Return the physical address of the DENSE I/O memory or NULL if none |
| is available (e.g. on a jensen). */ |
| extern unsigned long int _bus_base (void) __THROW __attribute__ ((const)); |
| extern unsigned long int bus_base (void) __THROW __attribute__ ((const)); |
| |
| /* Return the physical address of the SPARSE I/O memory. */ |
| extern unsigned long _bus_base_sparse (void) __THROW __attribute__ ((const)); |
| extern unsigned long bus_base_sparse (void) __THROW __attribute__ ((const)); |
| |
| /* Return the HAE shift used by the SPARSE I/O memory. */ |
| extern int _hae_shift (void) __THROW __attribute__ ((const)); |
| extern int hae_shift (void) __THROW __attribute__ ((const)); |
| |
| /* Previous three are deprecated in favour of the following, which |
| knows about multiple PCI "hoses". Provide the PCI bus and dfn |
| numbers just as to pciconfig_read/write. */ |
| |
| enum __pciconfig_iobase_which |
| { |
| IOBASE_HOSE = 0, /* Return hose index. */ |
| IOBASE_SPARSE_MEM = 1, /* Return physical memory addresses. */ |
| IOBASE_DENSE_MEM = 2, |
| IOBASE_SPARSE_IO = 3, |
| IOBASE_DENSE_IO = 4 |
| }; |
| |
| extern long pciconfig_iobase(enum __pciconfig_iobase_which __which, |
| unsigned long int __bus, |
| unsigned long int __dfn) |
| __THROW __attribute__ ((const)); |
| |
| /* Access PCI space protected from machine checks. */ |
| extern int pciconfig_read (unsigned long int __bus, |
| unsigned long int __dfn, |
| unsigned long int __off, |
| unsigned long int __len, |
| unsigned char *__buf) __THROW; |
| |
| extern int pciconfig_write (unsigned long int __bus, |
| unsigned long int __dfn, |
| unsigned long int __off, |
| unsigned long int __len, |
| unsigned char *__buf) __THROW; |
| |
| /* Userspace declarations. */ |
| extern unsigned int inb (unsigned long __port) __THROW; |
| extern unsigned int inw (unsigned long __port) __THROW; |
| extern unsigned int inl (unsigned long __port) __THROW; |
| extern void outb (unsigned char __b, unsigned long __port) __THROW; |
| extern void outw (unsigned short __w, unsigned long __port) __THROW; |
| extern void outl (unsigned int __l, unsigned long __port) __THROW; |
| |
| __END_DECLS |
| |
| #endif /* _SYS_IO_H */ |
