From 61aa6324af982b635f8c392640a4e8e450c4c6b4 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 18 Nov 2012 19:31:58 -0500
Subject: add port io functions to sys/io.h
based on proposal by Isaac Dunham. nonexistance of bits/io.h will
cause inclusion of sys/io.h to produce an error on archs that are not
supposed to have it. this is probably the desired behavior, but the
error message may be a bit unusual.
---
arch/i386/bits/io.h | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 80 insertions(+)
create mode 100644 arch/i386/bits/io.h
(limited to 'arch/i386')
diff --git a/arch/i386/bits/io.h b/arch/i386/bits/io.h
new file mode 100644
index 00000000..d26ea57b
--- /dev/null
+++ b/arch/i386/bits/io.h
@@ -0,0 +1,80 @@
+int iopl(int);
+int ioperm(unsigned long, unsigned long, int);
+
+static __inline void outb(unsigned char __val, unsigned short __port)
+{
+ __asm__ volatile ("outb %0,%1" : : "a" (__val), "dN" (__port));
+}
+
+static __inline void outw(unsigned short __val, unsigned short __port)
+{
+ __asm__ volatile ("outw %0,%1" : : "a" (__val), "dN" (__port));
+}
+
+static __inline void outl(unsigned int __val, unsigned short __port)
+{
+ __asm__ volatile ("outl %0,%1" : : "a" (__val), "dN" (__port));
+}
+
+static __inline unsigned char inb(unsigned short __port)
+{
+ unsigned char __val;
+ __asm__ volatile ("inb %1,%0" : "=a" (__val) : "dN" (__port));
+ return __val;
+}
+
+static __inline unsigned short inw(unsigned short __port)
+{
+ unsigned short __val;
+ __asm__ volatile ("inw %1,%0" : "=a" (__val) : "dN" (__port));
+ return __val;
+}
+
+static __inline unsigned int inl(unsigned short __port)
+{
+ unsigned int __val;
+ __asm__ volatile ("inl %1,%0" : "=a" (__val) : "dN" (__port));
+ return __val;
+}
+
+static __inline void outsb(unsigned short __port, const void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; outsb"
+ : "+S" (__buf), "+c" (__n)
+ : "d" (__port));
+}
+
+static __inline void outsw(unsigned short __port, const void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; outsw"
+ : "+S" (__buf), "+c" (__n)
+ : "d" (__port));
+}
+
+static __inline void outsl(unsigned short __port, const void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; outsl"
+ : "+S" (__buf), "+c"(__n)
+ : "d" (__port));
+}
+
+static __inline void insb(unsigned short __port, void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; insb"
+ : "+D" (__buf), "+c" (__n)
+ : "d" (__port));
+}
+
+static __inline void insw(unsigned short __port, void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; insw"
+ : "+D" (__buf), "+c" (__n)
+ : "d" (__port));
+}
+
+static __inline void insl(unsigned short __port, void *__buf, unsigned long __n)
+{
+ __asm__ volatile ("cld; rep; insl"
+ : "+D" (__buf), "+c" (__n)
+ : "d" (__port));
+}
--
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