1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __ASM_SH_CMPXCHG_IRQ_H
3*4882a593Smuzhiyun #define __ASM_SH_CMPXCHG_IRQ_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/irqflags.h>
6*4882a593Smuzhiyun
xchg_u32(volatile u32 * m,unsigned long val)7*4882a593Smuzhiyun static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
8*4882a593Smuzhiyun {
9*4882a593Smuzhiyun unsigned long flags, retval;
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun local_irq_save(flags);
12*4882a593Smuzhiyun retval = *m;
13*4882a593Smuzhiyun *m = val;
14*4882a593Smuzhiyun local_irq_restore(flags);
15*4882a593Smuzhiyun return retval;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun
xchg_u16(volatile u16 * m,unsigned long val)18*4882a593Smuzhiyun static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun unsigned long flags, retval;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun local_irq_save(flags);
23*4882a593Smuzhiyun retval = *m;
24*4882a593Smuzhiyun *m = val;
25*4882a593Smuzhiyun local_irq_restore(flags);
26*4882a593Smuzhiyun return retval;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
xchg_u8(volatile u8 * m,unsigned long val)29*4882a593Smuzhiyun static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun unsigned long flags, retval;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun local_irq_save(flags);
34*4882a593Smuzhiyun retval = *m;
35*4882a593Smuzhiyun *m = val & 0xff;
36*4882a593Smuzhiyun local_irq_restore(flags);
37*4882a593Smuzhiyun return retval;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
__cmpxchg_u32(volatile int * m,unsigned long old,unsigned long new)40*4882a593Smuzhiyun static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
41*4882a593Smuzhiyun unsigned long new)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun __u32 retval;
44*4882a593Smuzhiyun unsigned long flags;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun local_irq_save(flags);
47*4882a593Smuzhiyun retval = *m;
48*4882a593Smuzhiyun if (retval == old)
49*4882a593Smuzhiyun *m = new;
50*4882a593Smuzhiyun local_irq_restore(flags); /* implies memory barrier */
51*4882a593Smuzhiyun return retval;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun #endif /* __ASM_SH_CMPXCHG_IRQ_H */
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