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[POWERPC] bootwrapper: Add 16-bit I/O, sync(), eieio(), and barrier()
Also, include types.h from io.h, so callers don't have to. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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1 changed files with 49 additions and 0 deletions
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@ -1,5 +1,8 @@
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#ifndef _IO_H
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#define __IO_H
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#include "types.h"
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/*
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* Low-level I/O routines.
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*
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@ -20,6 +23,37 @@ static inline void out_8(volatile unsigned char *addr, int val)
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: "=m" (*addr) : "r" (val));
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}
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static inline unsigned in_le16(const volatile u16 *addr)
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{
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unsigned ret;
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__asm__ __volatile__("lhbrx %0,0,%1; twi 0,%0,0; isync"
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: "=r" (ret) : "r" (addr), "m" (*addr));
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return ret;
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}
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static inline unsigned in_be16(const volatile u16 *addr)
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{
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unsigned ret;
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__asm__ __volatile__("lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
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: "=r" (ret) : "m" (*addr));
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return ret;
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}
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static inline void out_le16(volatile u16 *addr, int val)
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{
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__asm__ __volatile__("sthbrx %1,0,%2; sync" : "=m" (*addr)
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: "r" (val), "r" (addr));
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}
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static inline void out_be16(volatile u16 *addr, int val)
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{
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__asm__ __volatile__("sth%U0%X0 %1,%0; sync"
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: "=m" (*addr) : "r" (val));
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}
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static inline unsigned in_le32(const volatile unsigned *addr)
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{
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unsigned ret;
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@ -50,4 +84,19 @@ static inline void out_be32(volatile unsigned *addr, int val)
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: "=m" (*addr) : "r" (val));
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}
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static inline void sync(void)
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{
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asm volatile("sync" : : : "memory");
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}
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static inline void eieio(void)
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{
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asm volatile("eieio" : : : "memory");
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}
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static inline void barrier(void)
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{
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asm volatile("" : : : "memory");
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}
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#endif /* _IO_H */
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