mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
461f456817
The arm, xtensa and mips version of atomic.h were already very similar (the mips one was a copy of xtensa). Combine these implementations together to produce a generic atomic.h that can be included by these architectures (and any others that need it in future). Signed-off-by: Chris Packham <judge.packham@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com>
150 lines
2.7 KiB
C
150 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
|
|
#ifndef _ASM_GENERIC_ATOMIC_H
|
|
#define _ASM_GENERIC_ATOMIC_H
|
|
|
|
typedef struct { volatile int counter; } atomic_t;
|
|
#if BITS_PER_LONG == 32
|
|
typedef struct { volatile long long counter; } atomic64_t;
|
|
#else /* BIT_PER_LONG == 32 */
|
|
typedef struct { volatile long counter; } atomic64_t;
|
|
#endif
|
|
|
|
#define ATOMIC_INIT(i) { (i) }
|
|
|
|
#define atomic_read(v) ((v)->counter)
|
|
#define atomic_set(v, i) ((v)->counter = (i))
|
|
#define atomic64_read(v) atomic_read(v)
|
|
#define atomic64_set(v, i) atomic_set(v, i)
|
|
|
|
static inline void atomic_add(int i, atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter += i;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic_sub(int i, atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter -= i;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic_inc(atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
++v->counter;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic_dec(atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
--v->counter;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline int atomic_dec_and_test(volatile atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
int val;
|
|
|
|
local_irq_save(flags);
|
|
val = v->counter;
|
|
v->counter = val -= 1;
|
|
local_irq_restore(flags);
|
|
|
|
return val == 0;
|
|
}
|
|
|
|
static inline int atomic_add_negative(int i, volatile atomic_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
int val;
|
|
|
|
local_irq_save(flags);
|
|
val = v->counter;
|
|
v->counter = val += i;
|
|
local_irq_restore(flags);
|
|
|
|
return val < 0;
|
|
}
|
|
|
|
static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
*addr &= ~mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
#if BITS_PER_LONG == 32
|
|
|
|
static inline void atomic64_add(long long i, volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter += i;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic64_sub(long long i, volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter -= i;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
#else /* BIT_PER_LONG == 32 */
|
|
|
|
static inline void atomic64_add(long i, volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter += i;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic64_sub(long i, volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter -= i;
|
|
local_irq_restore(flags);
|
|
}
|
|
#endif
|
|
|
|
static inline void atomic64_inc(volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter += 1;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void atomic64_dec(volatile atomic64_t *v)
|
|
{
|
|
unsigned long flags = 0;
|
|
|
|
local_irq_save(flags);
|
|
v->counter -= 1;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
#endif
|