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authorManuel Novoa III <mjn3@codepoet.org>2001-06-17 02:53:47 +0000
committerManuel Novoa III <mjn3@codepoet.org>2001-06-17 02:53:47 +0000
commit55f1ccc5c91dbd8c868990ee6fc18ddd15e53844 (patch)
tree6affa6eb2149b5cc87ab02f192993528fb629ec9
parent34d61933bb059372c68a4cfacc4ce801dc1f28db (diff)
Add the in* and out* functions for i386. Note: the sys/io.h header for
glibc-2.2.2 actually defines static inline versions for i386, but only provides prototypes for externs for the other archs I looked at. Since uClibc shares this header amongst archs, I stashed the inline defs in bits/io_i386.h and included it when __i386__ was defined. Better solutions are most welcome, but it doesn't clutter sys/io.h too badly and now lilo and the pcmcia tools build against uClibc on i386 without modification.
-rw-r--r--include/sys/io.h11
-rw-r--r--libc/sysdeps/linux/i386/bits/io_i386.h171
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 */