[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>
diff --git a/arch/powerpc/boot/io.h b/arch/powerpc/boot/io.h
index 32974ed..ccaedae 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 @@
: "=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 @@
: "=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 */