blob: 67f15f1be68224efafdc25d7e3eab3f8098bcc46 [file] [log] [blame]
#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;
/*
* 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
#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 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;
extern struct task_struct *__switch_to(struct thread_info *, struct thread_info *);
#define switch_to(prev,next) \
do { \
__switch_to(prev->thread_info,next->thread_info); \
mb(); \
} while (0)
/* For spinlocks etc */
#define local_irq_save(x) __save_flags_cli(x)
#define local_irq_restore(x) __restore_flags(x)
#define local_irq_disable() __cli()
#define local_irq_enable() __sti()
#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() __cli()
#define sti() __sti()
#define clf() __clf()
#define stf() __stf()
#define save_flags(x) __save_flags(x)
#define restore_flags(x) __restore_flags(x)
#endif /* CONFIG_SMP */
#endif /* __KERNEL__ */
#endif