include/asm/io.h

38  * The insw/outsw/insl/outsl macros don't do byte-swapping.
40  * are arrays of bytes, and byte-swapping is not appropriate in
41  * that case.  - paulus
83  * The *_ns versions below don't do byte-swapping.
100  * Enforce In-order Execution of I/O:
109 static inline void sync(void)  in sync()  function
111 	__asm__ __volatile__ ("sync" : : : "memory");  in sync()
119 /* Enforce in-order execution of data I/O.
120  * No distinction between read/write on PPC; use eieio for all three.
126 #define mb()	sync()
130  * Non ordered and non-swapping "raw" accessors
162  * Read operations have additional twi & isync to make sure the read
171 		"sync; lbz%U1%X1 %0,%1;\n"  in in_8()
179 	__asm__ __volatile__("sync;\n"  in out_8()
189 	__asm__ __volatile__("sync; lhbrx %0,0,%1;\n"  in in_le16()
200 	__asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"  in in_be16()
208 	__asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :  in out_le16()
214 	__asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));  in out_be16()
221 	__asm__ __volatile__("sync; lwbrx %0,0,%1;\n"  in in_le32()
232 	__asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"  in in_be32()
240 	__asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :  in out_le32()
246 	__asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));  in out_be32()
251  * also be used to set a multiple-bit bit pattern using a mask, by
323 #include <asm-generic/io.h>