powerpc: Add read*_*/write*_* macros

Define the read*_*/write*_* macros for the PowerPC platform to be able
to use the macros in wait_bit.h.

Signed-off-by: Mario Six <mario.six@gdsys.cc>

arch/powerpc/include/asm/io.h

@@ -282,6 +282,24 @@ static inline void out_be32(volatile unsigned __iomem *addr, u32 val)
 #define setbits_8(addr, set) setbits(8, addr, set)
 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 
+#define readb_be(addr)							\
+	__raw_readb((__force unsigned *)(addr))
+#define readw_be(addr)							\
+	be16_to_cpu(__raw_readw((__force unsigned *)(addr)))
+#define readl_be(addr)							\
+	be32_to_cpu(__raw_readl((__force unsigned *)(addr)))
+#define readq_be(addr)							\
+	be64_to_cpu(__raw_readq((__force unsigned *)(addr)))
+
+#define writeb_be(val, addr)						\
+	__raw_writeb((val), (__force unsigned *)(addr))
+#define writew_be(val, addr)						\
+	__raw_writew(cpu_to_be16((val)), (__force unsigned *)(addr))
+#define writel_be(val, addr)						\
+	__raw_writel(cpu_to_be32((val)), (__force unsigned *)(addr))
+#define writeq_be(val, addr)						\
+	__raw_writeq(cpu_to_be64((val)), (__force unsigned *)(addr))
+
 static inline void *phys_to_virt(phys_addr_t paddr)
 {
 #ifdef CONFIG_ADDR_MAP