diff options
| -rw-r--r-- | include/sys/io.h | 11 | ||||
| -rw-r--r-- | libc/sysdeps/linux/i386/bits/io_i386.h | 171 |
2 files changed, 182 insertions, 0 deletions
diff --git a/include/sys/io.h b/include/sys/io.h index 9f9eebc6f..9ce921365 100644 --- a/include/sys/io.h +++ b/include/sys/io.h @@ -35,6 +35,16 @@ extern int ioperm __P ((unsigned long int __from, unsigned long int __num, extern int iopl __P ((int __level)); /* The functions that actually perform reads and writes. */ +#ifdef __i386__ +/* + * For i386, glibc defines the in* and out* functions as static inlines + * in this header file. For a number of other archs, these appear to be + * external functions. Since uClibc shares this header amongst archs, + * stash the i386 stuff in bits/io_i386.h for now to cut down on clutter + * and still give expected behavior. + */ +#include <bits/io_i386.h> +#else extern unsigned char inb (unsigned long port); extern unsigned short inw (unsigned long port); extern unsigned long inl (unsigned long port); @@ -42,6 +52,7 @@ extern unsigned long inl (unsigned long port); 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); +#endif /* __i386__ */ __END_DECLS diff --git a/libc/sysdeps/linux/i386/bits/io_i386.h b/libc/sysdeps/linux/i386/bits/io_i386.h new file mode 100644 index 000000000..a2660b3a5 --- /dev/null +++ b/libc/sysdeps/linux/i386/bits/io_i386.h @@ -0,0 +1,171 @@ +/* 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* + * June 16, 2001 hacked for uClibc inclusion by Manuel Novoa III + * + * This was originally sys/io.h from glibc-2.2.2. However, uClibc + * currently shares the same sys/io.h for all archs. So, I placed + * moved and renamed it to bits/io_i386.h and modified sys/io.h to + * conditionally include this if __i386__ was defined. + */ + +#if !defined _SYS_IO_H || defined _BITS_IO_I386_H +#error Never include <bits/io_i386.h> directly; use <sys/io.h> instead. +#endif + +#define _BITS_IO_I386_H 1 + +#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 */ |