asm-generic: fix inX/outX functions for architectures that have PCI

The definitions for the PC-style PIO functions in asm-generic/io.h were
meant as dummies so you could compile code on architectures without
ISA and PCI buses. However, unicore32 actually wants to use them
with a real PCI bus, so they need to be defined to actually address
the register window holding the I/O ports.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

include/asm-generic/io.h

@@ -94,6 +94,10 @@ static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
 #define writeq(b,addr) __raw_writeq(__cpu_to_le64(b),addr)
 #endif
 
+#ifndef PCI_IOBASE
+#define PCI_IOBASE ((void __iomem *) 0)
+#endif
+
 /*****************************************************************************/
 /*
  * traditional input/output functions
@@ -101,32 +105,32 @@ static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
 
 static inline u8 inb(unsigned long addr)
 {
-	return readb((volatile void __iomem *) addr);
+	return readb(addr + PCI_IOBASE);
 }
 
 static inline u16 inw(unsigned long addr)
 {
-	return readw((volatile void __iomem *) addr);
+	return readw(addr + PCI_IOBASE);
 }
 
 static inline u32 inl(unsigned long addr)
 {
-	return readl((volatile void __iomem *) addr);
+	return readl(addr + PCI_IOBASE);
 }
 
 static inline void outb(u8 b, unsigned long addr)
 {
-	writeb(b, (volatile void __iomem *) addr);
+	writeb(b, addr + PCI_IOBASE);
 }
 
 static inline void outw(u16 b, unsigned long addr)
 {
-	writew(b, (volatile void __iomem *) addr);
+	writew(b, addr + PCI_IOBASE);
 }
 
 static inline void outl(u32 b, unsigned long addr)
 {
-	writel(b, (volatile void __iomem *) addr);
+	writel(b, addr + PCI_IOBASE);
 }
 
 #define inb_p(addr)	inb(addr)
@@ -213,32 +217,32 @@ static inline void outsl(unsigned long addr, const void *buffer, int count)
 
 static inline void readsl(const void __iomem *addr, void *buf, int len)
 {
-	insl((unsigned long)addr, buf, len);
+	insl(addr - PCI_IOBASE, buf, len);
 }
 
 static inline void readsw(const void __iomem *addr, void *buf, int len)
 {
-	insw((unsigned long)addr, buf, len);
+	insw(addr - PCI_IOBASE, buf, len);
 }
 
 static inline void readsb(const void __iomem *addr, void *buf, int len)
 {
-	insb((unsigned long)addr, buf, len);
+	insb(addr - PCI_IOBASE, buf, len);
 }
 
 static inline void writesl(const void __iomem *addr, const void *buf, int len)
 {
-	outsl((unsigned long)addr, buf, len);
+	outsl(addr - PCI_IOBASE, buf, len);
 }
 
 static inline void writesw(const void __iomem *addr, const void *buf, int len)
 {
-	outsw((unsigned long)addr, buf, len);
+	outsw(addr - PCI_IOBASE, buf, len);
 }
 
 static inline void writesb(const void __iomem *addr, const void *buf, int len)
 {
-	outsb((unsigned long)addr, buf, len);
+	outsb(addr - PCI_IOBASE, buf, len);
 }
 
 #ifndef CONFIG_GENERIC_IOMAP
@@ -269,8 +273,9 @@ static inline void writesb(const void __iomem *addr, const void *buf, int len)
 	outsl((unsigned long) (p), (src), (count))
 #endif /* CONFIG_GENERIC_IOMAP */
 
-
-#define IO_SPACE_LIMIT 0xffffffff
+#ifndef IO_SPACE_LIMIT
+#define IO_SPACE_LIMIT 0xffff
+#endif
 
 #ifdef __KERNEL__