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- /* Copyright (C) 1996, 2000 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 */
-