]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/asm-cris/system.h
1 #ifndef __ASM_CRIS_SYSTEM_H
2 #define __ASM_CRIS_SYSTEM_H
4 #include <asm/arch/system.h>
6 /* the switch_to macro calls resume, an asm function in entry.S which does the actual
10 extern struct task_struct
*resume(struct task_struct
*prev
, struct task_struct
*next
, int);
11 #define prepare_to_switch() do { } while(0)
12 #define switch_to(prev,next,last) last = resume(prev,next, \
13 (int)&((struct task_struct *)0)->thread)
15 #define barrier() __asm__ __volatile__("": : :"memory")
16 #define mb() barrier()
19 #define read_barrier_depends() do { } while(0)
20 #define set_mb(var, value) do { var = value; mb(); } while (0)
21 #define set_wmb(var, value) do { var = value; wmb(); } while (0)
25 #define smp_rmb() rmb()
26 #define smp_wmb() wmb()
27 #define smp_read_barrier_depends() read_barrier_depends()
29 #define smp_mb() barrier()
30 #define smp_rmb() barrier()
31 #define smp_wmb() barrier()
32 #define smp_read_barrier_depends() do { } while(0)
38 * disable hlt during certain critical i/o operations
40 #define HAVE_DISABLE_HLT
41 void disable_hlt(void);
42 void enable_hlt(void);
44 extern inline unsigned long __xchg(unsigned long x
, volatile void * ptr
, int size
)
46 /* since Etrax doesn't have any atomic xchg instructions, we need to disable
47 irq's (if enabled) and do it with move.d's */
48 unsigned long flags
,temp
;
49 local_save_flags(flags
); /* save flags, including irq enable bit */
50 local_irq_disable(); /* shut off irq's */
53 *((unsigned char *)&temp
) = x
;
54 x
= *(unsigned char *)ptr
;
55 *(unsigned char *)ptr
= *((unsigned char *)&temp
);
58 *((unsigned short *)&temp
) = x
;
59 x
= *(unsigned short *)ptr
;
60 *(unsigned short *)ptr
= *((unsigned short *)&temp
);
64 x
= *(unsigned long *)ptr
;
65 *(unsigned long *)ptr
= temp
;
68 local_irq_restore(flags
); /* restore irq enable bit */
72 #define arch_align_stack(x) (x)