Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_BITOPS_CAS_H
#define __ASM_SH_BITOPS_CAS_H
 
static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new)
{
<------>__asm__ __volatile__("cas.l %1,%0,@r0"
<------><------>: "+r"(new)
<------><------>: "r"(old), "z"(p)
<------><------>: "t", "memory" );
<------>return new;
}
 
static inline void set_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old|mask) != old);
}
 
static inline void clear_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old&~mask) != old);
}
 
static inline void change_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old^mask) != old);
}
 
static inline int test_and_set_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old|mask) != old);
 
<------>return !!(old & mask);
}
 
static inline int test_and_clear_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old&~mask) != old);
 
<------>return !!(old & mask);
}
 
static inline int test_and_change_bit(int nr, volatile void *addr)
{
<------>unsigned mask, old;
<------>volatile unsigned *a = addr;
 
<------>a += nr >> 5;
<------>mask = 1U << (nr & 0x1f);
 
<------>do old = *a;
<------>while (__bo_cas(a, old, old^mask) != old);
 
<------>return !!(old & mask);
}
 
#include <asm-generic/bitops/non-atomic.h>
 
#endif /* __ASM_SH_BITOPS_CAS_H */