arch/arm/include/asm/fiq.h

   1 /*
   2  *  arch/arm/include/asm/fiq.h
   3  *
   4  * Support for FIQ on ARM architectures.
   5  * Written by Philip Blundell <philb@gnu.org>, 1998
   6  * Re-written by Russell King
   7  */
   8
   9 #ifndef __ASM_FIQ_H
  10 #define __ASM_FIQ_H
  11
  12 #include <asm/ptrace.h>
  13
  14 struct fiq_handler {
  15         struct fiq_handler *next;
  16         /* Name
  17          */
  18         const char *name;
  19         /* Called to ask driver to relinquish/
  20          * reacquire FIQ
  21          * return zero to accept, or -<errno>
  22          */
  23         int (*fiq_op)(void *, int relinquish);
  24         /* data for the relinquish/reacquire functions
  25          */
  26         void *dev_id;
  27 };
  28
  29 extern int claim_fiq(struct fiq_handler *f);
  30 extern void release_fiq(struct fiq_handler *f);
  31 extern void set_fiq_handler(void *start, unsigned int length);
  32 extern void enable_fiq(int fiq);
  33 extern void disable_fiq(int fiq);
  34
  35 /* helpers defined in fiqasm.S: */
  36 extern void __set_fiq_regs(unsigned long const *regs);
  37 extern void __get_fiq_regs(unsigned long *regs);
  38
  39 static inline void set_fiq_regs(struct pt_regs const *regs)
  40 {
  41         __set_fiq_regs(&regs->ARM_r8);
  42 }
  43
  44 static inline void get_fiq_regs(struct pt_regs *regs)
  45 {
  46         __get_fiq_regs(&regs->ARM_r8);
  47 }
  48
  49 #endif