1 files changed, 70 insertions, 0 deletions
diff --git a/i386/include/mach/i386/pio.h b/i386/include/mach/i386/pio.h
new file mode 100644
index 0000000..06311db
--- /dev/null
+++ b/i386/include/mach/i386/pio.h
@@ -0,0 +1,70 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#ifndef _MACH_I386_PIO_H_
+#define _MACH_I386_PIO_H_
+
+#ifdef	__GNUC__
+
+#define inl(port) \
+({ unsigned long _tmp__; \
+	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(port))); \
+	_tmp__; })
+
+#define inw(port) \
+({ unsigned short _tmp__; \
+	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(port))); \
+	_tmp__; })
+
+#define inb(port) \
+({ unsigned char _tmp__; \
+	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(port))); \
+	_tmp__; })
+
+
+#define outl(port, val) \
+({ asm volatile("outl %0, %1" : : "a" (val) , "d" ((unsigned short)(port))); })
+
+
+#define outw(port, val) \
+({asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(val)) , "d" ((unsigned short)(port))); })
+
+
+#define outb(port, val) \
+({ asm volatile("outb %0, %1" : : "a" ((unsigned char)(val)) , "d" ((unsigned short)(port))); })
+
+
+/* Inline code works just as well for 16-bit code as for 32-bit.  */
+#define i16_inl(port) inl(port)
+#define i16_inw(port) inw(port)
+#define i16_inb(port) inb(port)
+#define i16_outl(port, val) outl(port, val)
+#define i16_outw(port, val) outw(port, val)
+#define i16_outb(port, val) outb(port, val)
+
+#endif	__GNUC__
+
+#endif /* _MACH_I386_PIO_H_ */