text: /*
   *  arch/arm/include/asm/proc-fns.h
   *
   *  Copyright (C) 1997-1999 Russell King
   *  Copyright (C) 2000 Deep Blue Solutions Ltd
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  #ifndef __ASM_PROCFNS_H
  #define __ASM_PROCFNS_H
  
  #ifdef __KERNEL__
  
  #include <asm/glue-proc.h>
  #include <asm/page.h>
  
  #ifndef __ASSEMBLY__
  
  struct mm_struct;
  
  /*
   * Don't change this structure - ASM code relies on it.
   */
  extern struct processor {
  	/* MISC
  	 * get data abort address/flags
  	 */
  	void (*_data_abort)(unsigned long pc);
  	/*
  	 * Retrieve prefetch fault address
  	 */
  	unsigned long (*_prefetch_abort)(unsigned long lr);
  	/*
  	 * Set up any processor specifics
  	 */
  	void (*_proc_init)(void);
  	/*
  	 * Disable any processor specifics
  	 */
  	void (*_proc_fin)(void);
  	/*
  	 * Special stuff for a reset
  	 */
  	void (*reset)(unsigned long addr) __attribute__((noreturn));
  	/*
  	 * Idle the processor
  	 */
  	int (*_do_idle)(void);
  	/*
  	 * Processor architecture specific
  	 */
  	/*
  	 * clean a virtual address range from the
  	 * D-cache without flushing the cache.
  	 */
  	void (*dcache_clean_area)(void *addr, int size);
  
  	/*
  	 * Set the page table
  	 */
  	void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
  	/*
  	 * Set a possibly extended PTE.  Non-extended PTEs should
  	 * ignore 'ext'.
  	 */
  	void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
  
  	/* Suspend/resume */
  	unsigned int suspend_size;
  	void (*do_suspend)(void *);
  	void (*do_resume)(void *);
  } processor;
  
  #ifndef MULTI_CPU
  extern void cpu_proc_init(void);
  extern void cpu_proc_fin(void);
  extern int cpu_do_idle(void);
  extern void cpu_dcache_clean_area(void *, int);
  extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
  extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
  extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
  #else
  #define cpu_proc_init()			processor._proc_init()
  #define cpu_proc_fin()			processor._proc_fin()
  #define cpu_reset(addr)			processor.reset(addr)
  #define cpu_do_idle()			processor._do_idle()
  #define cpu_dcache_clean_area(addr,sz)	processor.dcache_clean_area(addr,sz)
  #define cpu_set_pte_ext(ptep,pte,ext)	processor.set_pte_ext(ptep,pte,ext)
  #define cpu_do_switch_mm(pgd,mm)	processor.switch_mm(pgd,mm)
  #endif
  
  extern void cpu_resume(void);
  
  #include <asm/memory.h>
  
  #ifdef CONFIG_MMU
  
  #ifdef CONFIG_SMP
  
  #define cpu_switch_mm(pgd, mm)	\
  	({							\
  		unsigned long flags;				\
  		local_irq_save(flags);				\
  		cpu_do_switch_mm(virt_to_phys(pgd), mm);	\
  		local_irq_restore(flags);			\
  	})
  
  #else /* SMP */
  
  #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
  
  #endif
  
  #define cpu_get_pgd()	\
  	({						\
  		unsigned long pg;			\
  		__asm__("mrc	p15, 0, %0, c2, c0, 0"	\
  			 : "=r" (pg) : : "cc");		\
  		pg &= ~0x3fff;				\
  		(pgd_t *)phys_to_virt(pg);		\
  	})
  
  #endif
  
  #endif /* __ASSEMBLY__ */
  #endif /* __KERNEL__ */
  #endif /* __ASM_PROCFNS_H */
  