1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/arm/include/asm/fiq.h
5 * Support for FIQ on ARM architectures.
6 * Written by Philip Blundell <philb@gnu.org>, 1998
7 * Re-written by Russell King
9 * NOTE: The FIQ mode registers are not magically preserved across
12 * Drivers which require these registers to be preserved across power
13 * management operations must implement appropriate suspend/resume handlers to
14 * save and restore them.
20 #include <asm/ptrace.h>
23 struct fiq_handler *next;
27 /* Called to ask driver to relinquish/
29 * return zero to accept, or -<errno>
31 int (*fiq_op)(void *, int relinquish);
32 /* data for the relinquish/reacquire functions
37 extern int claim_fiq(struct fiq_handler *f);
38 extern void release_fiq(struct fiq_handler *f);
39 extern void set_fiq_handler(void *start, unsigned int length);
40 extern void enable_fiq(int fiq);
41 extern void disable_fiq(int fiq);
43 /* helpers defined in fiqasm.S: */
44 extern void __set_fiq_regs(unsigned long const *regs);
45 extern void __get_fiq_regs(unsigned long *regs);
47 static inline void set_fiq_regs(struct pt_regs const *regs)
49 __set_fiq_regs(®s->ARM_r8);
52 static inline void get_fiq_regs(struct pt_regs *regs)
54 __get_fiq_regs(®s->ARM_r8);