#ifndef _IO_H #define __IO_H #include "types.h" /* * Low-level I/O routines. * * Copied from <file:arch/powerpc/include/asm/io.h> (which has no copyright) */ static inline int in_8(const volatile unsigned char *addr) { int ret; __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync" : "=r" (ret) : "m" (*addr)); return ret; } static inline void out_8(volatile unsigned char *addr, int val) { __asm__ __volatile__("stb%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val)); } static inline unsigned in_le16(const volatile u16 *addr) { unsigned ret; __asm__ __volatile__("lhbrx %0,0,%1; twi 0,%0,0; isync" : "=r" (ret) : "r" (addr), "m" (*addr)); return ret; } static inline unsigned in_be16(const volatile u16 *addr) { unsigned ret; __asm__ __volatile__("lhz%U1%X1 %0,%1; twi 0,%0,0; isync" : "=r" (ret) : "m" (*addr)); return ret; } static inline void out_le16(volatile u16 *addr, int val) { __asm__ __volatile__("sthbrx %1,0,%2; sync" : "=m" (*addr) : "r" (val), "r" (addr)); } static inline void out_be16(volatile u16 *addr, int val) { __asm__ __volatile__("sth%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val)); } static inline unsigned in_le32(const volatile unsigned *addr) { unsigned ret; __asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync" : "=r" (ret) : "r" (addr), "m" (*addr)); return ret; } static inline unsigned in_be32(const volatile unsigned *addr) { unsigned ret; __asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync" : "=r" (ret) : "m" (*addr)); return ret; } static inline void out_le32(volatile unsigned *addr, int val) { __asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr) : "r" (val), "r" (addr)); } static inline void out_be32(volatile unsigned *addr, int val) { __asm__ __volatile__("stw%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val)); } static inline void sync(void) { asm volatile("sync" : : : "memory"); } static inline void eieio(void) { asm volatile("eieio" : : : "memory"); } static inline void barrier(void) { asm volatile("" : : : "memory"); } #endif /* _IO_H */