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57 lines
1.4 KiB
57 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* arch/arm/include/asm/fiq.h |
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* |
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* Support for FIQ on ARM architectures. |
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* Written by Philip Blundell <[email protected]>, 1998 |
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* Re-written by Russell King |
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* |
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* NOTE: The FIQ mode registers are not magically preserved across |
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* suspend/resume. |
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* |
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* Drivers which require these registers to be preserved across power |
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* management operations must implement appropriate suspend/resume handlers to |
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* save and restore them. |
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*/ |
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#ifndef __ASM_FIQ_H |
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#define __ASM_FIQ_H |
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#include <asm/ptrace.h> |
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struct fiq_handler { |
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struct fiq_handler *next; |
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/* Name |
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*/ |
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const char *name; |
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/* Called to ask driver to relinquish/ |
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* reacquire FIQ |
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* return zero to accept, or -<errno> |
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*/ |
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int (*fiq_op)(void *, int relinquish); |
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/* data for the relinquish/reacquire functions |
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*/ |
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void *dev_id; |
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}; |
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extern int claim_fiq(struct fiq_handler *f); |
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extern void release_fiq(struct fiq_handler *f); |
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extern void set_fiq_handler(void *start, unsigned int length); |
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extern void enable_fiq(int fiq); |
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extern void disable_fiq(int fiq); |
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/* helpers defined in fiqasm.S: */ |
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extern void __set_fiq_regs(unsigned long const *regs); |
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extern void __get_fiq_regs(unsigned long *regs); |
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static inline void set_fiq_regs(struct pt_regs const *regs) |
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{ |
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__set_fiq_regs(®s->ARM_r8); |
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} |
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static inline void get_fiq_regs(struct pt_regs *regs) |
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{ |
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__get_fiq_regs(®s->ARM_r8); |
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} |
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#endif
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