[net-next-2.6.git] / include / asm-cris / arch-v32 / system.h

#ifndef _ASM_CRIS_ARCH_SYSTEM_H
#define _ASM_CRIS_ARCH_SYSTEM_H


/* Read the CPU version register. */
static inline unsigned long rdvr(void)
{
	unsigned char vr;

	__asm__ __volatile__ ("move $vr, %0" : "=rm" (vr));
	return vr;
}

#define cris_machine_name "crisv32"

/* Read the user-mode stack pointer. */
static inline unsigned long rdusp(void)
{
	unsigned long usp;

	__asm__ __volatile__ ("move $usp, %0" : "=rm" (usp));
	return usp;
}

/* Read the current stack pointer. */
static inline unsigned long rdsp(void)
{
	unsigned long sp;

	__asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp));
	return sp;
}

/* Write the user-mode stack pointer. */
#define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp))

#define nop() __asm__ __volatile__ ("nop");

#define xchg(ptr,x) \
	((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr))))

#define tas(ptr) (xchg((ptr),1))

struct __xchg_dummy { unsigned long a[100]; };
#define __xg(x) ((struct __xchg_dummy *)(x))

/* Used for interrupt control. */
#define local_save_flags(x) \
	__asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory");

#define local_irq_restore(x) \
	__asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory");

#define local_irq_disable()  __asm__ __volatile__ ("di" : : : "memory");
#define local_irq_enable()   __asm__ __volatile__ ("ei" : : : "memory");

#define irqs_disabled()		\
({				\
	unsigned long flags;	\
				\
	local_save_flags(flags);\
	!(flags & (1 << I_CCS_BITNR));	\
})

/* Used for spinlocks, etc. */
#define local_irq_save(x) \
	__asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory");

#endif /* _ASM_CRIS_ARCH_SYSTEM_H */
Commit	Line	Data
51533b61 MS	1	#ifndef _ASM_CRIS_ARCH_SYSTEM_H
	2	#define _ASM_CRIS_ARCH_SYSTEM_H
	3
51533b61 MS	4
51533b61 MS	5	/* Read the CPU version register. */
d9b5444e	6	static inline unsigned long rdvr(void)
51533b61 MS	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. */
d9b5444e	17	static inline unsigned long rdusp(void)
51533b61 MS	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. */
d9b5444e	26	static inline unsigned long rdsp(void)
51533b61 MS	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
	44	struct __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
51533b61	69	#endif /* _ASM_CRIS_ARCH_SYSTEM_H */