4 * Low-level I/O routines.
6 * Copied from <file:include/asm-powerpc/io.h> (which has no copyright)
8 static inline int in_8(const volatile unsigned char *addr)
12 __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
13 : "=r" (ret) : "m" (*addr));
17 static inline void out_8(volatile unsigned char *addr, int val)
19 __asm__ __volatile__("stb%U0%X0 %1,%0; sync"
20 : "=m" (*addr) : "r" (val));
23 static inline unsigned in_le32(const volatile unsigned *addr)
27 __asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync"
28 : "=r" (ret) : "r" (addr), "m" (*addr));
32 static inline unsigned in_be32(const volatile unsigned *addr)
36 __asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
37 : "=r" (ret) : "m" (*addr));
41 static inline void out_le32(volatile unsigned *addr, int val)
43 __asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr)
44 : "r" (val), "r" (addr));
47 static inline void out_be32(volatile unsigned *addr, int val)
49 __asm__ __volatile__("stw%U0%X0 %1,%0; sync"
50 : "=m" (*addr) : "r" (val));