#ifndef _ARM_KEXEC_H
  #define _ARM_KEXEC_H
  
  #ifdef CONFIG_KEXEC
  
  /* Maximum physical address we can use pages from */
  #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
  /* Maximum address we can reach in physical address mode */
  #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  /* Maximum address we can use for the control code buffer */

  #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)

  #define KEXEC_CONTROL_PAGE_SIZE	4096

  
  #define KEXEC_ARCH KEXEC_ARCH_ARM

  #define KEXEC_ARM_ATAGS_OFFSET  0x1000
  #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000

  #ifndef __ASSEMBLY__

  /**
   * crash_setup_regs() - save registers for the panic kernel
   * @newregs: registers are saved here
   * @oldregs: registers to be saved (may be %NULL)
   *
   * Function copies machine registers from @oldregs to @newregs. If @oldregs is
   * %NULL then current registers are stored there.
   */

  static inline void crash_setup_regs(struct pt_regs *newregs,

  				    struct pt_regs *oldregs)
  {
  	if (oldregs) {
  		memcpy(newregs, oldregs, sizeof(*newregs));
  	} else {

  		__asm__ __volatile__ (
  			"stmia	%[regs_base], {r0-r12}
  \t"
  			"mov	%[_ARM_sp], sp
  \t"
  			"str	lr, %[_ARM_lr]
  \t"
  			"adr	%[_ARM_pc], 1f
  \t"
  			"mrs	%[_ARM_cpsr], cpsr
  \t"
  		"1:"
  			: [_ARM_pc] "=r" (newregs->ARM_pc),
  			  [_ARM_cpsr] "=r" (newregs->ARM_cpsr),
  			  [_ARM_sp] "=r" (newregs->ARM_sp),
  			  [_ARM_lr] "=o" (newregs->ARM_lr)
  			: [regs_base] "r" (&newregs->ARM_r0)
  			: "memory"
  		);

  	}
  }

  /* Function pointer to optional machine-specific reinitialization */
  extern void (*kexec_reinit)(void);

  #endif /* __ASSEMBLY__ */
  
  #endif /* CONFIG_KEXEC */
  
  #endif /* _ARM_KEXEC_H */