1#ifndef _ASM_CRIS_ARCH_SYSTEM_H
2#define _ASM_CRIS_ARCH_SYSTEM_H
3
4
5/* Read the CPU version register. */
6static inline unsigned long rdvr(void)
7{
8	unsigned char vr;
9
10	__asm__ __volatile__ ("move $vr, %0" : "=rm" (vr));
11	return vr;
12}
13
14#define cris_machine_name "crisv32"
15
16/* Read the user-mode stack pointer. */
17static inline unsigned long rdusp(void)
18{
19	unsigned long usp;
20
21	__asm__ __volatile__ ("move $usp, %0" : "=rm" (usp));
22	return usp;
23}
24
25/* Read the current stack pointer. */
26static inline unsigned long rdsp(void)
27{
28	unsigned long sp;
29
30	__asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp));
31	return sp;
32}
33
34/* Write the user-mode stack pointer. */
35#define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp))
36
37#define nop() __asm__ __volatile__ ("nop");
38
39#define xchg(ptr,x) \
40	((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr))))
41
42#define tas(ptr) (xchg((ptr),1))
43
44struct __xchg_dummy { unsigned long a[100]; };
45#define __xg(x) ((struct __xchg_dummy *)(x))
46
47/* Used for interrupt control. */
48#define local_save_flags(x) \
49	__asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory");
50
51#define local_irq_restore(x) \
52	__asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory");
53
54#define local_irq_disable()  __asm__ __volatile__ ("di" : : : "memory");
55#define local_irq_enable()   __asm__ __volatile__ ("ei" : : : "memory");
56
57#define irqs_disabled()		\
58({				\
59	unsigned long flags;	\
60				\
61	local_save_flags(flags);\
62	!(flags & (1 << I_CCS_BITNR));	\
63})
64
65/* Used for spinlocks, etc. */
66#define local_irq_save(x) \
67	__asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory");
68
69#ifdef CONFIG_SMP
70typedef struct {
71	volatile unsigned int lock __attribute__ ((aligned(4)));
72#ifdef CONFIG_PREEMPT
73	unsigned int break_lock;
74#endif
75} spinlock_t;
76#endif
77
78#endif /* _ASM_CRIS_ARCH_SYSTEM_H */
79