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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 | 2 | /* |
4baa9922 | 3 | * arch/arm/include/asm/fiq.h |
1da177e4 LT |
4 | * |
5 | * Support for FIQ on ARM architectures. | |
6 | * Written by Philip Blundell <philb@gnu.org>, 1998 | |
7 | * Re-written by Russell King | |
2846d84f DM |
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. | |
1da177e4 LT |
15 | */ |
16 | ||
17 | #ifndef __ASM_FIQ_H | |
18 | #define __ASM_FIQ_H | |
19 | ||
20 | #include <asm/ptrace.h> | |
21 | ||
22 | struct 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 | ||
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); | |
1da177e4 LT |
40 | extern void enable_fiq(int fiq); |
41 | extern void disable_fiq(int fiq); | |
42 | ||
dc2eb928 DM |
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); | |
46 | ||
47 | static inline void set_fiq_regs(struct pt_regs const *regs) | |
48 | { | |
49 | __set_fiq_regs(®s->ARM_r8); | |
50 | } | |
51 | ||
52 | static inline void get_fiq_regs(struct pt_regs *regs) | |
53 | { | |
54 | __get_fiq_regs(®s->ARM_r8); | |
55 | } | |
56 | ||
1da177e4 | 57 | #endif |