1 /* Copyright (C) 1996, 2000 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 #if defined __UCLIBC_LINUX_SPECIFIC__
27 /* If TURN_ON is TRUE, request for permission to do direct i/o on the
28 port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O
29 permission off for that range. This call requires root privileges.
31 Portability note: not all Linux platforms support this call. Most
32 platforms based on the PC I/O architecture probably will, however.
33 E.g., Linux/Alpha for Alpha PCs supports this. */
34 extern int ioperm (unsigned long int __from, unsigned long int __num,
35 int __turn_on) __THROW;
37 /* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to
38 access any I/O port is granted. This call requires root
40 extern int iopl (int __level) __THROW;
41 #endif /* __UCLIBC_LINUX_SPECIFIC__ */
43 #if defined __GNUC__ && __GNUC__ >= 2
45 static __inline unsigned char
46 inb (unsigned short int port)
50 __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
54 static __inline unsigned char
55 inb_p (unsigned short int port)
59 __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
63 static __inline unsigned short int
64 inw (unsigned short int port)
68 __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (port));
72 static __inline unsigned short int
73 inw_p (unsigned short int port)
75 unsigned short int _v;
77 __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
81 static __inline unsigned int
82 inl (unsigned short int port)
86 __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (port));
90 static __inline unsigned int
91 inl_p (unsigned short int port)
94 __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
99 outb (unsigned char value, unsigned short int port)
101 __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
105 outb_p (unsigned char value, unsigned short int port)
107 __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (value),
112 outw (unsigned short int value, unsigned short int port)
114 __asm__ __volatile__ ("outw %w0,%w1": :"a" (value), "Nd" (port));
119 outw_p (unsigned short int value, unsigned short int port)
121 __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (value),
126 outl (unsigned int value, unsigned short int port)
128 __asm__ __volatile__ ("outl %0,%w1": :"a" (value), "Nd" (port));
132 outl_p (unsigned int value, unsigned short int port)
134 __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (value),
139 insb (unsigned short int port, void *addr, unsigned long int count)
141 __asm__ __volatile__ ("cld ; rep ; insb":"=D" (addr),
142 "=c" (count):"d" (port), "0" (addr), "1" (count));
146 insw (unsigned short int port, void *addr, unsigned long int count)
148 __asm__ __volatile__ ("cld ; rep ; insw":"=D" (addr),
149 "=c" (count):"d" (port), "0" (addr), "1" (count));
153 insl (unsigned short int port, void *addr, unsigned long int count)
155 __asm__ __volatile__ ("cld ; rep ; insl":"=D" (addr),
156 "=c" (count):"d" (port), "0" (addr), "1" (count));
160 outsb (unsigned short int port, const void *addr, unsigned long int count)
162 __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (addr),
163 "=c" (count):"d" (port), "0" (addr), "1" (count));
167 outsw (unsigned short int port, const void *addr, unsigned long int count)
169 __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (addr),
170 "=c" (count):"d" (port), "0" (addr), "1" (count));
174 outsl (unsigned short int port, const void *addr, unsigned long int count)
176 __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (addr),
177 "=c" (count):"d" (port), "0" (addr), "1" (count));
183 #endif /* _SYS_IO_H */