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 * NOTE: The FIQ mode registers are not magically preserved across
 9 * suspend/resume.
10 *
11 * Drivers which require these registers to be preserved across power
12 * management operations must implement appropriate suspend/resume handlers to
13 * save and restore them.
14 */
15
16#ifndef __ASM_FIQ_H
17#define __ASM_FIQ_H
18
19#include <asm/ptrace.h>
20
21struct fiq_handler {
22	struct fiq_handler *next;
23	/* Name
24	 */
25	const char *name;
26	/* Called to ask driver to relinquish/
27	 * reacquire FIQ
28	 * return zero to accept, or -<errno>
29	 */
30	int (*fiq_op)(void *, int relinquish);
31	/* data for the relinquish/reacquire functions
32	 */
33	void *dev_id;
34};
35
36extern int claim_fiq(struct fiq_handler *f);
37extern void release_fiq(struct fiq_handler *f);
38extern void set_fiq_handler(void *start, unsigned int length);
39extern void enable_fiq(int fiq);
40extern void disable_fiq(int fiq);
41
42/* helpers defined in fiqasm.S: */
43extern void __set_fiq_regs(unsigned long const *regs);
44extern void __get_fiq_regs(unsigned long *regs);
45
46static inline void set_fiq_regs(struct pt_regs const *regs)
47{
48	__set_fiq_regs(&regs->ARM_r8);
49}
50
51static inline void get_fiq_regs(struct pt_regs *regs)
52{
53	__get_fiq_regs(&regs->ARM_r8);
54}
55
56#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 *  arch/arm/include/asm/fiq.h
 4 *
 5 * Support for FIQ on ARM architectures.
 6 * Written by Philip Blundell <philb@gnu.org>, 1998
 7 * Re-written by Russell King
 8 *
 9 * NOTE: The FIQ mode registers are not magically preserved across
10 * suspend/resume.
11 *
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.
15 */
16
17#ifndef __ASM_FIQ_H
18#define __ASM_FIQ_H
19
20#include <asm/ptrace.h>
21
22struct fiq_handler {
23	struct fiq_handler *next;
24	/* Name
25	 */
26	const char *name;
27	/* Called to ask driver to relinquish/
28	 * reacquire FIQ
29	 * return zero to accept, or -<errno>
30	 */
31	int (*fiq_op)(void *, int relinquish);
32	/* data for the relinquish/reacquire functions
33	 */
34	void *dev_id;
35};
36
37extern int claim_fiq(struct fiq_handler *f);
38extern void release_fiq(struct fiq_handler *f);
39extern void set_fiq_handler(void *start, unsigned int length);
40extern void enable_fiq(int fiq);
41extern void disable_fiq(int fiq);
42
43/* helpers defined in fiqasm.S: */
44extern void __set_fiq_regs(unsigned long const *regs);
45extern void __get_fiq_regs(unsigned long *regs);
46
47static inline void set_fiq_regs(struct pt_regs const *regs)
48{
49	__set_fiq_regs(&regs->ARM_r8);
50}
51
52static inline void get_fiq_regs(struct pt_regs *regs)
53{
54	__get_fiq_regs(&regs->ARM_r8);
55}
56
57#endif