| /* Copyright (C) 1996, 2000, 2002, 2009 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #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; |
| |
| #if defined __GNUC__ && __GNUC__ >= 2 |
| |
| static __inline unsigned char |
| inb (unsigned short int __port) |
| { |
| unsigned char _v; |
| |
| __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline unsigned char |
| inb_p (unsigned short int __port) |
| { |
| unsigned char _v; |
| |
| __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline unsigned short int |
| inw (unsigned short int __port) |
| { |
| unsigned short _v; |
| |
| __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline unsigned short int |
| inw_p (unsigned short int __port) |
| { |
| unsigned short int _v; |
| |
| __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline unsigned int |
| inl (unsigned short int __port) |
| { |
| unsigned int _v; |
| |
| __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline unsigned int |
| inl_p (unsigned short int __port) |
| { |
| unsigned int _v; |
| __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port)); |
| return _v; |
| } |
| |
| static __inline void |
| outb (unsigned char __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outb %b0,%w1": :"a" (__value), "Nd" (__port)); |
| } |
| |
| static __inline void |
| outb_p (unsigned char __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (__value), |
| "Nd" (__port)); |
| } |
| |
| static __inline void |
| outw (unsigned short int __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outw %w0,%w1": :"a" (__value), "Nd" (__port)); |
| |
| } |
| |
| static __inline void |
| outw_p (unsigned short int __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (__value), |
| "Nd" (__port)); |
| } |
| |
| static __inline void |
| outl (unsigned int __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outl %0,%w1": :"a" (__value), "Nd" (__port)); |
| } |
| |
| static __inline void |
| outl_p (unsigned int __value, unsigned short int __port) |
| { |
| __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (__value), |
| "Nd" (__port)); |
| } |
| |
| static __inline void |
| insb (unsigned short int __port, void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; insb":"=D" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| static __inline void |
| insw (unsigned short int __port, void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; insw":"=D" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| static __inline void |
| insl (unsigned short int __port, void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; insl":"=D" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| static __inline void |
| outsb (unsigned short int __port, const void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| static __inline void |
| outsw (unsigned short int __port, const void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| static __inline void |
| outsl (unsigned short int __port, const void *addr, unsigned long int __count) |
| { |
| __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (addr), "=c" (__count) |
| :"d" (__port), "0" (addr), "1" (__count)); |
| } |
| |
| #endif /* GNU C */ |
| |
| __END_DECLS |
| #endif /* _SYS_IO_H */ |