1 files changed, 624 insertions, 127 deletions

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index b8fdc57a7335..9db042304df3 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -12,6 +12,7 @@
 #define __ASM_GENERIC_IO_H
 
 #include <asm/page.h> /* I/O is all done through memory accesses */
+#include <linux/string.h> /* for memset() and memcpy() */
 #include <linux/types.h>
 
 #ifdef CONFIG_GENERIC_IOMAP
@@ -24,260 +25,691 @@
 #define mmiowb() do {} while (0)
 #endif
 
-/*****************************************************************************/
 /*
- * readX/writeX() are used to access memory mapped devices. On some
- * architectures the memory mapped IO stuff needs to be accessed
- * differently. On the simple architectures, we just read/write the
- * memory location directly.
+ * __raw_{read,write}{b,w,l,q}() access memory in native endianness.
+ *
+ * On some architectures memory mapped IO needs to be accessed differently.
+ * On the simple architectures, we just read/write the memory location
+ * directly.
  */
+
 #ifndef __raw_readb
+#define __raw_readb __raw_readb
 static inline u8 __raw_readb(const volatile void __iomem *addr)
 {
-        return *(const volatile u8 __force *) addr;
+        return *(const volatile u8 __force *)addr;
 }
 #endif
 
 #ifndef __raw_readw
+#define __raw_readw __raw_readw
 static inline u16 __raw_readw(const volatile void __iomem *addr)
 {
-        return *(const volatile u16 __force *) addr;
+        return *(const volatile u16 __force *)addr;
 }
 #endif
 
 #ifndef __raw_readl
+#define __raw_readl __raw_readl
 static inline u32 __raw_readl(const volatile void __iomem *addr)
 {
-        return *(const volatile u32 __force *) addr;
+        return *(const volatile u32 __force *)addr;
 }
 #endif
 
-#define readb __raw_readb
-
-#define readw readw
-static inline u16 readw(const volatile void __iomem *addr)
-{
-        return __le16_to_cpu(__raw_readw(addr));
-}
-
-#define readl readl
-static inline u32 readl(const volatile void __iomem *addr)
+#ifdef CONFIG_64BIT
+#ifndef __raw_readq
+#define __raw_readq __raw_readq
+static inline u64 __raw_readq(const volatile void __iomem *addr)
 {
-        return __le32_to_cpu(__raw_readl(addr));
+        return *(const volatile u64 __force *)addr;
 }
+#endif
+#endif /* CONFIG_64BIT */
 
 #ifndef __raw_writeb
-static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
+#define __raw_writeb __raw_writeb
+static inline void __raw_writeb(u8 value, volatile void __iomem *addr)
 {
-        *(volatile u8 __force *) addr = b;
+        *(volatile u8 __force *)addr = value;
 }
 #endif
 
 #ifndef __raw_writew
-static inline void __raw_writew(u16 b, volatile void __iomem *addr)
+#define __raw_writew __raw_writew
+static inline void __raw_writew(u16 value, volatile void __iomem *addr)
 {
-        *(volatile u16 __force *) addr = b;
+        *(volatile u16 __force *)addr = value;
 }
 #endif
 
 #ifndef __raw_writel
-static inline void __raw_writel(u32 b, volatile void __iomem *addr)
+#define __raw_writel __raw_writel
+static inline void __raw_writel(u32 value, volatile void __iomem *addr)
 {
-        *(volatile u32 __force *) addr = b;
+        *(volatile u32 __force *)addr = value;
 }
 #endif
 
-#define writeb __raw_writeb
-#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
-#define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr)
-
 #ifdef CONFIG_64BIT
-#ifndef __raw_readq
-static inline u64 __raw_readq(const volatile void __iomem *addr)
+#ifndef __raw_writeq
+#define __raw_writeq __raw_writeq
+static inline void __raw_writeq(u64 value, volatile void __iomem *addr)
 {
-        return *(const volatile u64 __force *) addr;
+        *(volatile u64 __force *)addr = value;
 }
 #endif
+#endif /* CONFIG_64BIT */
 
-#define readq readq
-static inline u64 readq(const volatile void __iomem *addr)
-{
-        return __le64_to_cpu(__raw_readq(addr));
-}
+/*
+ * {read,write}{b,w,l,q}() access little endian memory and return result in
+ * native endianness.
+ */
 
-#ifndef __raw_writeq
-static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
+#ifndef readb
+#define readb readb
+static inline u8 readb(const volatile void __iomem *addr)
 {
-        *(volatile u64 __force *) addr = b;
+        return __raw_readb(addr);
 }
 #endif
 
-#define writeq(b, addr) __raw_writeq(__cpu_to_le64(b), addr)
-#endif /* CONFIG_64BIT */
-
-#ifndef PCI_IOBASE
-#define PCI_IOBASE ((void __iomem *) 0)
+#ifndef readw
+#define readw readw
+static inline u16 readw(const volatile void __iomem *addr)
+{
+        return __le16_to_cpu(__raw_readw(addr));
+}
 #endif
 
-/*****************************************************************************/
-/*
- * traditional input/output functions
- */
-
-static inline u8 inb(unsigned long addr)
+#ifndef readl
+#define readl readl
+static inline u32 readl(const volatile void __iomem *addr)
 {
-        return readb(addr + PCI_IOBASE);
+        return __le32_to_cpu(__raw_readl(addr));
 }
+#endif
 
-static inline u16 inw(unsigned long addr)
+#ifdef CONFIG_64BIT
+#ifndef readq
+#define readq readq
+static inline u64 readq(const volatile void __iomem *addr)
 {
-        return readw(addr + PCI_IOBASE);
+        return __le64_to_cpu(__raw_readq(addr));
 }
+#endif
+#endif /* CONFIG_64BIT */
 
-static inline u32 inl(unsigned long addr)
+#ifndef writeb
+#define writeb writeb
+static inline void writeb(u8 value, volatile void __iomem *addr)
 {