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#ifndef __ASM_ARM_SYSTEM_H

#define __ASM_ARM_SYSTEM_H

#ifdef __KERNEL__

#include <linux/config.h>

#include <linux/kernel.h>

/* 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;

/*

 * This tells us if we have an ISA bridge

 * present in a PCI system.

 */

#ifdef CONFIG_PCI

extern int have_isa_bridge;

#else

#define have_isa_bridge         (0)

#endif

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);

#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);

/*

 * Include processor dependent parts

 */

#include <asm/proc/system.h>

#define mb() __asm__ __volatile__ ("" : : : "memory")

#define rmb() mb()

#define wmb() mb()

#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.

 */

extern struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next);

#define switch_to(prev,next,last)               \

        do {                                    \

                last = __switch_to(prev,next);  \

                mb();                           \

        } while (0)

/* For spinlocks etc */

#define __save_flags_cli(x)     local_irq_save(x)

#define __save_flags(x)         local_save_flags(x)

#define __restore_flags(x)      local_irq_restore(x)

#define __cli()                 local_irq_disable()

#define __sti()                 local_irq_enable()

#ifdef CONFIG_SMP

#error SMP not supported

#define smp_mb()                mb()

#define smp_rmb()               rmb()

#define smp_wmb()               wmb()

#else

#define smp_mb()                barrier()

#define smp_rmb()               barrier()

#define smp_wmb()               barrier()

#define cli()                   local_irq_disable()

#define sti()                   local_irq_enable()

#define clf()                   __clf()

#define stf()                   __stf()

#define save_flags(x)           local_save_flags(x)

#define restore_flags(x)        local_irq_restore(x)

#define save_flags_cli(x)       local_irq_save(x)

#define save_and_cli(x)         local_irq_save(x)

#define save_and_sti(x)         local_irq_set(x)

#endif /* CONFIG_SMP */

#endif /* __KERNEL__ */

#endif