Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright IBM Corp. 1999, 2016
 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
 *	      Denis Joseph Barrow,
 *	      Arnd Bergmann,
 */
 
#ifndef __ARCH_S390_ATOMIC__
#define __ARCH_S390_ATOMIC__
 
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/atomic_ops.h>
#include <asm/barrier.h>
#include <asm/cmpxchg.h>
 
static inline int atomic_read(const atomic_t *v)
{
<------>int c;
 
<------>asm volatile(
<------><------>"	l	%0,%1\n"
<------><------>: "=d" (c) : "Q" (v->counter));
<------>return c;
}
 
static inline void atomic_set(atomic_t *v, int i)
{
<------>asm volatile(
<------><------>"	st	%1,%0\n"
<------><------>: "=Q" (v->counter) : "d" (i));
}
 
static inline int atomic_add_return(int i, atomic_t *v)
{
<------>return __atomic_add_barrier(i, &v->counter) + i;
}
 
static inline int atomic_fetch_add(int i, atomic_t *v)
{
<------>return __atomic_add_barrier(i, &v->counter);
}
 
static inline void atomic_add(int i, atomic_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
<------>/*
<------> * Order of conditions is important to circumvent gcc 10 bug:
<------> * https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
<------> */
<------>if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
<------><------>__atomic_add_const(i, &v->counter);
<------><------>return;
<------>}
#endif
<------>__atomic_add(i, &v->counter);
}
 
#define atomic_sub(_i, _v)		atomic_add(-(int)(_i), _v)
#define atomic_sub_return(_i, _v)	atomic_add_return(-(int)(_i), _v)
#define atomic_fetch_sub(_i, _v)	atomic_fetch_add(-(int)(_i), _v)
 
#define ATOMIC_OPS(op)							\
static inline void atomic_##op(int i, atomic_t *v)			\
{									\
<------>__atomic_##op(i, &v->counter);					\
}									\
static inline int atomic_fetch_##op(int i, atomic_t *v)			\
{									\
<------>return __atomic_##op##_barrier(i, &v->counter);			\
}
 
ATOMIC_OPS(and)
ATOMIC_OPS(or)
ATOMIC_OPS(xor)
 
#undef ATOMIC_OPS
 
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
<------>return __atomic_cmpxchg(&v->counter, old, new);
}
 
#define ATOMIC64_INIT(i)  { (i) }
 
static inline s64 atomic64_read(const atomic64_t *v)
{
<------>s64 c;
 
<------>asm volatile(
<------><------>"	lg	%0,%1\n"
<------><------>: "=d" (c) : "Q" (v->counter));
<------>return c;
}
 
static inline void atomic64_set(atomic64_t *v, s64 i)
{
<------>asm volatile(
<------><------>"	stg	%1,%0\n"
<------><------>: "=Q" (v->counter) : "d" (i));
}
 
static inline s64 atomic64_add_return(s64 i, atomic64_t *v)
{
<------>return __atomic64_add_barrier(i, (long *)&v->counter) + i;
}
 
static inline s64 atomic64_fetch_add(s64 i, atomic64_t *v)
{
<------>return __atomic64_add_barrier(i, (long *)&v->counter);
}
 
static inline void atomic64_add(s64 i, atomic64_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
<------>/*
<------> * Order of conditions is important to circumvent gcc 10 bug:
<------> * https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
<------> */
<------>if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
<------><------>__atomic64_add_const(i, (long *)&v->counter);
<------><------>return;
<------>}
#endif
<------>__atomic64_add(i, (long *)&v->counter);
}
 
#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
 
static inline s64 atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new)
{
<------>return __atomic64_cmpxchg((long *)&v->counter, old, new);
}
 
#define ATOMIC64_OPS(op)						\
static inline void atomic64_##op(s64 i, atomic64_t *v)			\
{									\
<------>__atomic64_##op(i, (long *)&v->counter);			\
}									\
static inline long atomic64_fetch_##op(s64 i, atomic64_t *v)		\
{									\
<------>return __atomic64_##op##_barrier(i, (long *)&v->counter);	\
}
 
ATOMIC64_OPS(and)
ATOMIC64_OPS(or)
ATOMIC64_OPS(xor)
 
#undef ATOMIC64_OPS
 
#define atomic64_sub_return(_i, _v)	atomic64_add_return(-(s64)(_i), _v)
#define atomic64_fetch_sub(_i, _v)	atomic64_fetch_add(-(s64)(_i), _v)
#define atomic64_sub(_i, _v)		atomic64_add(-(s64)(_i), _v)
 
#endif /* __ARCH_S390_ATOMIC__  */