projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 4baa9922 | 2 | * arch/arm/include/asm/fiq.h |
| 1da177e4 LT |
3 | * |
| 4 | * Support for FIQ on ARM architectures. | |
| 5 | * Written by Philip Blundell <philb@gnu.org>, 1998 | |
| 6 | * Re-written by Russell King | |
| 2846d84f DM |
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. | |
| 1da177e4 LT |
14 | */ |
| 15 | ||
| 16 | #ifndef __ASM_FIQ_H | |
| 17 | #define __ASM_FIQ_H | |
| 18 | ||
| 19 | #include <asm/ptrace.h> | |
| 20 | ||
| 21 | struct 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 | ||
| 36 | extern int claim_fiq(struct fiq_handler *f); | |
| 37 | extern void release_fiq(struct fiq_handler *f); | |
| 38 | extern void set_fiq_handler(void *start, unsigned int length); | |
| 1da177e4 LT |
39 | extern void enable_fiq(int fiq); |
| 40 | extern void disable_fiq(int fiq); | |
| 41 | ||
| dc2eb928 DM |
42 | /* helpers defined in fiqasm.S: */ |
| 43 | extern void __set_fiq_regs(unsigned long const *regs); | |
| 44 | extern void __get_fiq_regs(unsigned long *regs); | |
| 45 | ||
| 46 | static inline void set_fiq_regs(struct pt_regs const *regs) | |
| 47 | { | |
| 48 | __set_fiq_regs(®s->ARM_r8); | |
| 49 | } | |
| 50 | ||
| 51 | static inline void get_fiq_regs(struct pt_regs *regs) | |
| 52 | { | |
| 53 | __get_fiq_regs(®s->ARM_r8); | |
| 54 | } | |
| 55 | ||
| 1da177e4 | 56 | #endif |