diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/io.h | 158 |
1 files changed, 14 insertions, 144 deletions
diff --git a/include/sys/io.h b/include/sys/io.h index ffe3109d5..9f9eebc6f 100644 --- a/include/sys/io.h +++ b/include/sys/io.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1998 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 @@ -17,162 +17,32 @@ Boston, MA 02111-1307, USA. */ #ifndef _SYS_IO_H -#define _SYS_IO_H 1 +#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. */ + permission off for that range. This call requires root privileges. */ extern int ioperm __P ((unsigned long int __from, unsigned long int __num, int __turn_on)); -/* 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. */ +/* Set the I/O privilege level to LEVEL. If LEVEL is nonzero, + permission to access any I/O port is granted. This call requires + root privileges. */ extern int iopl __P ((int __level)); +/* The functions that actually perform reads and writes. */ +extern unsigned char inb (unsigned long port); +extern unsigned short inw (unsigned long port); +extern unsigned long inl (unsigned long port); -extern inline unsigned char -inb (unsigned short port) -{ - unsigned char _v; - - __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline unsigned char -inb_p (unsigned short port) -{ - unsigned char _v; - - __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline unsigned short -inw (unsigned short port) -{ - unsigned short _v; - - __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline unsigned short -inw_p (unsigned short port) -{ - unsigned short _v; - - __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline unsigned int -inl (unsigned short port) -{ - unsigned int _v; - - __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline unsigned int -inl_p (unsigned short port) -{ - unsigned int _v; - __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port)); - return _v; -} - -extern inline void -outb (unsigned char value, unsigned short port) -{ - __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port)); -} - -extern inline void -outb_p (unsigned char value, unsigned short port) -{ - __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (value), - "Nd" (port)); -} - -extern inline void -outw (unsigned short value, unsigned short port) -{ - __asm__ __volatile__ ("outw %w0,%w1": :"a" (value), "Nd" (port)); - -} - -extern inline void -outw_p (unsigned short value, unsigned short port) -{ - __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (value), - "Nd" (port)); -} - -extern inline void -outl (unsigned int value, unsigned short port) -{ - __asm__ __volatile__ ("outl %0,%w1": :"a" (value), "Nd" (port)); -} - -extern inline void -outl_p (unsigned int value, unsigned short port) -{ - __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (value), - "Nd" (port)); -} - -extern inline void -insb (unsigned short port, void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; insb":"=D" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} - -extern inline void -insw (unsigned short port, void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; insw":"=D" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} - -extern inline void -insl (unsigned short port, void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; insl":"=D" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} - -extern inline void -outsb (unsigned short port, const void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} - -extern inline void -outsw (unsigned short port, const void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} - -extern inline void -outsl (unsigned short port, const void *addr, unsigned long count) -{ - __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (addr), - "=c" (count):"d" (port), "0" (addr), "1" (count)); -} +extern void outb (unsigned char value, unsigned long port); +extern void outw (unsigned short value, unsigned long port); +extern void outl (unsigned long value, unsigned long port); __END_DECLS + #endif /* _SYS_IO_H */ |