#ifndef __ASM_ARM_SYSTEM_H
#define __ASM_ARM_SYSTEM_H

#ifdef __KERNEL__

#include <linux/config.h>
#include <linux/kernel.h>

struct thread_info;

/* information about the system we're running on */
extern unsigned int system_rev;
extern unsigned int system_serial_low;
extern unsigned int system_serial_high;
extern unsigned int mem_fclk_21285;

struct pt_regs;

void die(const char *msg, struct pt_regs *regs, int err)
		__attribute__((noreturn));

void die_if_kernel(const char *str, struct pt_regs *regs, int err);

void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
				       struct pt_regs *),
		     int sig, const char *name);

#include <asm/proc-fns.h>

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

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

extern asmlinkage void __backtrace(void);

#define CPU_ARCH_UNKNOWN	0
#define CPU_ARCH_ARMv3		1
#define CPU_ARCH_ARMv4		2
#define CPU_ARCH_ARMv4T		3
#define CPU_ARCH_ARMv5		4
#define CPU_ARCH_ARMv5T		5
#define CPU_ARCH_ARMv5TE	6

extern int cpu_architecture(void);

/*
 * Include processor dependent parts
 */
#include <asm/proc/system.h>

#define mb() __asm__ __volatile__ ("" : : : "memory")
#define rmb() mb()
#define wmb() mb()
#define read_barrier_depends() do { } while(0)
#define set_mb(var, value)  do { var = value; mb(); } while (0)
#define set_wmb(var, value) do { var = value; wmb(); } while (0)
#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");

#define prepare_to_switch()    do { } while(0)

/*
 * switch_to(prev, next) should switch from task `prev' to `next'
 * `prev' will never be the same as `next'.
 * The `mb' is to tell GCC not to cache `current' across this call.
 */
struct thread_info;
struct task_struct;
extern struct task_struct *__switch_to(struct task_struct *, struct thread_info *, struct thread_info *);

#define switch_to(prev,next,last)						\
	do {									\
		last = __switch_to(prev,prev->thread_info,next->thread_info);	\
		mb();								\
	} while (0)

#ifdef CONFIG_SMP
#error SMP not supported

#define smp_mb()		mb()
#define smp_rmb()		rmb()
#define smp_wmb()		wmb()
#define smp_read_barrier_depends()		read_barrier_depends()

#else

#define smp_mb()		barrier()
#define smp_rmb()		barrier()
#define smp_wmb()		barrier()
#define smp_read_barrier_depends()		do { } while(0)

#define clf()			__clf()
#define stf()			__stf()

#define irqs_disabled()			\
({					\
	unsigned long flags;		\
	local_save_flags(flags);	\
	flags & PSR_I_BIT;		\
})

#endif /* CONFIG_SMP */

#endif /* __KERNEL__ */

#endif