864a865,925
> #ifdef linux	/* don't mess with other OSs */
> 
> /*
>  * EGCS 1.1 knows about arbitrary unaligned loads (and we don't support older
>  * versions anyway. Define some packed structures to talk about such things
>  * with.
>  */
> 
> struct __una_u32 { unsigned int   x __attribute__((packed)); };
> struct __una_u16 { unsigned short x __attribute__((packed)); };
> 
> static __inline__ void stw_u(unsigned long val, unsigned short *p)
> {
> 	struct __una_u16 *ptr = (struct __una_u16 *) p;
> 	ptr->x = val;
> }
> 
> static __inline__ void stl_u(unsigned long val, unsigned int *p)
> {
> 	struct __una_u32 *ptr = (struct __una_u32 *) p;
> 	ptr->x = val;
> }
> 
> #if X_BYTE_ORDER == X_BIG_ENDIAN
> static __inline__ unsigned int
> xf86ReadMmio32Be(__volatile__ void *base, const unsigned long offset)
> {
> 	unsigned long addr = ((unsigned long)base) + offset;
> 	unsigned int ret;
> 
> 	__asm__ __volatile__("lw %0, 0(%1)"
> 			     : "=r" (ret)
> 			     : "r" (addr));
> 	return ret;
> }
> 
> static __inline__ void
> xf86WriteMmio32Be(__volatile__ void *base, const unsigned long offset,
> 		  const unsigned int val)
> {
> 	unsigned long addr = ((unsigned long)base) + offset;
> 
> 	__asm__ __volatile__("sw %0, 0(%1)"
> 			     : /* No outputs */
> 			     : "r" (val), "r" (addr));
> }
> #endif
> 
> #define mem_barrier() \
> __asm__ __volatile__(					\
> 	"# prevent instructions being moved around\n\t"	\
> 	".set\tnoreorder\n\t"				\
> 	"# 8 nops to fool the R4400 pipeline\n\t"	\
> 	"nop;nop;nop;nop;nop;nop;nop;nop\n\t"		\
> 	".set\treorder"					\
> 	: /* no output */				\
> 	: /* no input */				\
> 	: "memory")
> #define write_mem_barrier() mem_barrier()
> 
> #else  /* !linux */
874a936
> #endif /* !linux */