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[POWERPC] bootwrapper: Add 16-bit I/O, sync(), eieio(), and barrier()

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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>
This commit is contained in:
Scott Wood 2007-08-21 03:39:51 +10:00 committed by Paul Mackerras
parent a73ac50c47
commit 6e913c67b3
1 changed files with 49 additions and 0 deletions
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49
arch/powerpc/boot/io.h
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@ -1,5 +1,8 @@
#ifndef _IO_H
#define __IO_H
#include "types.h"
/*
* Low-level I/O routines.
*
@ -20,6 +23,37 @@ static inline void out_8(volatile unsigned char *addr, int val)
: "=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;
@ -50,4 +84,19 @@ static inline void out_be32(volatile unsigned *addr, int val)
: "=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 */