1 files changed, 48 insertions, 0 deletions
diff --git a/sys/i386/include/pio.h b/sys/i386/include/pio.h
new file mode 100644
index 0000000..ef9aba3
--- /dev/null
+++ b/sys/i386/include/pio.h
@@ -0,0 +1,48 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * All rights reserved.  The CMU software License Agreement specifies
+ * the terms and conditions for use and redistribution.
+ *
+ *	from: Mach, unknown, 386BSD patch kit
+ *	$Id: pio.h,v 1.2 1993/10/16 14:39:23 rgrimes Exp $
+ */
+
+#ifndef _MACHINE_PIO_H_
+#define _MACHINE_PIO_H_ 1
+
+#define inl(y) \
+({ unsigned long _tmp__; \
+	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
+	_tmp__; })
+
+#define inw(y) \
+({ unsigned short _tmp__; \
+	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
+	_tmp__; })
+
+/*
+ * only do this if it has not already be defined.. this is a crock for the
+ * patch kit for right now.  Need to clean up all the inx, outx stuff for
+ * 0.1.5 to use 1 common header file, that has Bruces fast mode inb/outb
+ * stuff in it.  Rgrimes 5/27/93
+ */
+#ifndef inb
+#define inb(y) \
+({ unsigned char _tmp__; \
+	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
+	_tmp__; })
+#endif
+
+
+#define outl(x, y) \
+{ asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
+
+
+#define outw(x, y) \
+{asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
+
+
+#define outb(x, y) \
+{ asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }
+#endif /* _MACHINE_PIO_H_ */