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 switch_to(prev,next,last) last = resume(prev,next, \
12 (int)&((struct task_struct *)0)->thread)
14 #define barrier() __asm__ __volatile__("": : :"memory")
15 #define mb() barrier()
18 #define read_barrier_depends() do { } while(0)
19 #define set_mb(var, value) do { var = value; mb(); } while (0)
20 #define set_wmb(var, value) do { var = value; wmb(); } while (0)
24 #define smp_rmb() rmb()
25 #define smp_wmb() wmb()
26 #define smp_read_barrier_depends() read_barrier_depends()
28 #define smp_mb() barrier()
29 #define smp_rmb() barrier()
30 #define smp_wmb() barrier()
31 #define smp_read_barrier_depends() do { } while(0)
37 * disable hlt during certain critical i/o operations
39 #define HAVE_DISABLE_HLT
40 void disable_hlt(void);
41 void enable_hlt(void);
43 static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
45 /* since Etrax doesn't have any atomic xchg instructions, we need to disable
46 irq's (if enabled) and do it with move.d's */
47 unsigned long flags,temp;
48 local_save_flags(flags); /* save flags, including irq enable bit */
49 local_irq_disable(); /* shut off irq's */
52 *((unsigned char *)&temp) = x;
53 x = *(unsigned char *)ptr;
54 *(unsigned char *)ptr = *((unsigned char *)&temp);
57 *((unsigned short *)&temp) = x;
58 x = *(unsigned short *)ptr;
59 *(unsigned short *)ptr = *((unsigned short *)&temp);
63 x = *(unsigned long *)ptr;
64 *(unsigned long *)ptr = temp;
67 local_irq_restore(flags); /* restore irq enable bit */
71 #define arch_align_stack(x) (x)
73 void default_idle(void);