mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 11:18:28 +00:00
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
#ifndef _PPC_BYTEORDER_H
|
|
#define _PPC_BYTEORDER_H
|
|
|
|
#include <asm/types.h>
|
|
|
|
#ifdef __GNUC__
|
|
|
|
extern __inline__ unsigned ld_le16(const volatile unsigned short *addr)
|
|
{
|
|
unsigned val;
|
|
|
|
__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
|
|
return val;
|
|
}
|
|
|
|
extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val)
|
|
{
|
|
__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
|
|
}
|
|
|
|
extern __inline__ unsigned ld_le32(const volatile unsigned *addr)
|
|
{
|
|
unsigned val;
|
|
|
|
__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
|
|
return val;
|
|
}
|
|
|
|
extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
|
|
{
|
|
__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
|
|
}
|
|
|
|
/* alas, egcs sounds like it has a bug in this code that doesn't use the
|
|
inline asm correctly, and can cause file corruption. Until I hear that
|
|
it's fixed, I can live without the extra speed. I hope. */
|
|
#if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90)
|
|
#if 0
|
|
# define __arch_swab16(x) ld_le16(&x)
|
|
# define __arch_swab32(x) ld_le32(&x)
|
|
#else
|
|
static __inline__ __attribute__((const)) __u16 ___arch__swab16(__u16 value)
|
|
{
|
|
__u16 result;
|
|
|
|
__asm__("rlwimi %0,%1,8,16,23"
|
|
: "=r" (result)
|
|
: "r" (value), "0" (value >> 8));
|
|
return result;
|
|
}
|
|
|
|
static __inline__ __attribute__((const)) __u32 ___arch__swab32(__u32 value)
|
|
{
|
|
__u32 result;
|
|
|
|
__asm__("rlwimi %0,%1,24,16,23\n\t"
|
|
"rlwimi %0,%1,8,8,15\n\t"
|
|
"rlwimi %0,%1,24,0,7"
|
|
: "=r" (result)
|
|
: "r" (value), "0" (value >> 24));
|
|
return result;
|
|
}
|
|
#define __arch__swab32(x) ___arch__swab32(x)
|
|
#define __arch__swab16(x) ___arch__swab16(x)
|
|
#endif /* 0 */
|
|
|
|
#endif
|
|
|
|
/* The same, but returns converted value from the location pointer by addr. */
|
|
#define __arch__swab16p(addr) ld_le16(addr)
|
|
#define __arch__swab32p(addr) ld_le32(addr)
|
|
|
|
/* The same, but do the conversion in situ, ie. put the value back to addr. */
|
|
#define __arch__swab16s(addr) st_le16(addr,*addr)
|
|
#define __arch__swab32s(addr) st_le32(addr,*addr)
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
|
|
#define __BYTEORDER_HAS_U64__
|
|
#endif
|
|
#include <linux/byteorder/big_endian.h>
|
|
|
|
#endif /* _PPC_BYTEORDER_H */
|