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authorScott Wood <scottwood@freescale.com>2007-08-21 03:39:51 +1000
committerPaul Mackerras <paulus@samba.org>2007-08-22 15:21:48 +1000
commit6e913c67b3eb93e2b8bc1dc0ff854f00a760f41b (patch)
treea998424f035f70a942d17f8619d711c400079fb0 /arch/powerpc/boot/io.h
parenta73ac50c4787b1b28d5c94bb18c60352f5dd7d6f (diff)
[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>
Diffstat (limited to 'arch/powerpc/boot/io.h')
-rw-r--r--arch/powerpc/boot/io.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/powerpc/boot/io.h b/arch/powerpc/boot/io.h
index 32974ed49e02..ccaedaec50d5 100644
--- a/arch/powerpc/boot/io.h
+++ b/arch/powerpc/boot/io.h
@@ -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 */