72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
|
#ifndef __ASM_SH_ATOMIC_IRQ_H
|
||
|
|
#define __ASM_SH_ATOMIC_IRQ_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* To get proper branch prediction for the main line, we must branch
|
||
|
|
* forward to code at the end of this object's .text section, then
|
||
|
|
* branch back to restart the operation.
|
||
|
|
*/
|
||
|
|
static inline void atomic_add(int i, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
*(long *)v += i;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void atomic_sub(int i, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
*(long *)v -= i;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int atomic_add_return(int i, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long temp, flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
temp = *(long *)v;
|
||
|
|
temp += i;
|
||
|
|
*(long *)v = temp;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
|
||
|
|
return temp;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int atomic_sub_return(int i, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long temp, flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
temp = *(long *)v;
|
||
|
|
temp -= i;
|
||
|
|
*(long *)v = temp;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
|
||
|
|
return temp;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
*(long *)v &= ~mask;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
*(long *)v |= mask;
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __ASM_SH_ATOMIC_IRQ_H */
|