diff options
author | Scott Wood <scottwood@freescale.com> | 2007-08-20 19:39:51 +0200 |
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committer | Paul Mackerras <paulus@samba.org> | 2007-08-22 07:21:48 +0200 |
commit | 6e913c67b3eb93e2b8bc1dc0ff854f00a760f41b (patch) | |
tree | a998424f035f70a942d17f8619d711c400079fb0 /arch/powerpc/boot | |
parent | [POWERPC] bootwrapper: Add dt_is_compatible() (diff) | |
download | linux-6e913c67b3eb93e2b8bc1dc0ff854f00a760f41b.tar.xz linux-6e913c67b3eb93e2b8bc1dc0ff854f00a760f41b.zip |
[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')
-rw-r--r-- | arch/powerpc/boot/io.h | 49 |
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 */ |