Caller side code changes regarding memory mapped IO. This patch applies
	for mips architectures and is used by xf86-video-siliconmotion.
--- xorg-server-1.7.6.orig/hw/xfree86/common/compiler.h	2010-03-12 05:38:22.000000000 +0100
+++ xorg-server-1.7.6/hw/xfree86/common/compiler.h	2010-06-05 09:43:12.531809482 +0200
@@ -713,42 +713,43 @@ xf86WriteMmio32LeNB(__volatile__ void *b
 #     define PORT_SIZE short
 #    endif
 
-_X_EXPORT unsigned int IOPortBase;  /* Memory mapped I/O port area */
+_X_EXPORT volatile unsigned char *ioBase;  /* Memory mapped I/O port area */
+
 
 static __inline__ void
 outb(unsigned PORT_SIZE port, unsigned char val)
 {
-	*(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
+	*(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
 }
 
 static __inline__ void
 outw(unsigned PORT_SIZE port, unsigned short val)
 {
-	*(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
+	*(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
 }
 
 static __inline__ void
 outl(unsigned PORT_SIZE port, unsigned int val)
 {
-	*(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
+	*(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
 }
 
 static __inline__ unsigned int
 inb(unsigned PORT_SIZE port)
 {
-	return *(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+IOPortBase);
+	return *(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+ioBase);
 }
 
 static __inline__ unsigned int
 inw(unsigned PORT_SIZE port)
 {
-	return *(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+IOPortBase);
+	return *(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+ioBase);
 }
 
 static __inline__ unsigned int
 inl(unsigned PORT_SIZE port)
 {
-	return *(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+IOPortBase);
+	return *(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+ioBase);
 }