104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _IO_H
|
|
#define _IO_H
|
|
|
|
#include "types.h"
|
|
|
|
/*
|
|
* Low-level I/O routines.
|
|
*
|
|
* Copied from <file:arch/powerpc/include/asm/io.h> (which has no copyright)
|
|
*/
|
|
static inline int in_8(const volatile unsigned char *addr)
|
|
{
|
|
int ret;
|
|
|
|
__asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
|
|
: "=r" (ret) : "m" (*addr));
|
|
return ret;
|
|
}
|
|
|
|
static inline void out_8(volatile unsigned char *addr, int val)
|
|
{
|
|
__asm__ __volatile__("stb%U0%X0 %1,%0; sync"
|
|
: "=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;
|
|
|
|
__asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync"
|
|
: "=r" (ret) : "r" (addr), "m" (*addr));
|
|
return ret;
|
|
}
|
|
|
|
static inline unsigned in_be32(const volatile unsigned *addr)
|
|
{
|
|
unsigned ret;
|
|
|
|
__asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
|
|
: "=r" (ret) : "m" (*addr));
|
|
return ret;
|
|
}
|
|
|
|
static inline void out_le32(volatile unsigned *addr, int val)
|
|
{
|
|
__asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr)
|
|
: "r" (val), "r" (addr));
|
|
}
|
|
|
|
static inline void out_be32(volatile unsigned *addr, int val)
|
|
{
|
|
__asm__ __volatile__("stw%U0%X0 %1,%0; sync"
|
|
: "=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 */
|