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117 lines
2.9 KiB
117 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 1999 Cort Dougan <[email protected]> |
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*/ |
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#ifndef _ASM_POWERPC_SWITCH_TO_H |
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#define _ASM_POWERPC_SWITCH_TO_H |
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#include <linux/sched.h> |
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#include <asm/reg.h> |
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struct thread_struct; |
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struct task_struct; |
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struct pt_regs; |
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extern struct task_struct *__switch_to(struct task_struct *, |
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struct task_struct *); |
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#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next))) |
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extern struct task_struct *_switch(struct thread_struct *prev, |
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struct thread_struct *next); |
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extern void switch_booke_debug_regs(struct debug_reg *new_debug); |
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extern int emulate_altivec(struct pt_regs *); |
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#ifdef CONFIG_PPC_BOOK3S_64 |
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void restore_math(struct pt_regs *regs); |
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#else |
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static inline void restore_math(struct pt_regs *regs) |
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{ |
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} |
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#endif |
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void restore_tm_state(struct pt_regs *regs); |
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extern void flush_all_to_thread(struct task_struct *); |
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extern void giveup_all(struct task_struct *); |
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#ifdef CONFIG_PPC_FPU |
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extern void enable_kernel_fp(void); |
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extern void flush_fp_to_thread(struct task_struct *); |
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extern void giveup_fpu(struct task_struct *); |
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extern void save_fpu(struct task_struct *); |
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static inline void disable_kernel_fp(void) |
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{ |
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msr_check_and_clear(MSR_FP); |
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} |
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#else |
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static inline void save_fpu(struct task_struct *t) { } |
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static inline void flush_fp_to_thread(struct task_struct *t) { } |
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#endif |
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#ifdef CONFIG_ALTIVEC |
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extern void enable_kernel_altivec(void); |
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extern void flush_altivec_to_thread(struct task_struct *); |
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extern void giveup_altivec(struct task_struct *); |
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extern void save_altivec(struct task_struct *); |
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static inline void disable_kernel_altivec(void) |
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{ |
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msr_check_and_clear(MSR_VEC); |
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} |
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#else |
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static inline void save_altivec(struct task_struct *t) { } |
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static inline void __giveup_altivec(struct task_struct *t) { } |
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#endif |
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#ifdef CONFIG_VSX |
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extern void enable_kernel_vsx(void); |
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extern void flush_vsx_to_thread(struct task_struct *); |
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static inline void disable_kernel_vsx(void) |
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{ |
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msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX); |
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} |
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#else |
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static inline void enable_kernel_vsx(void) |
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{ |
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BUILD_BUG(); |
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} |
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static inline void disable_kernel_vsx(void) |
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{ |
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BUILD_BUG(); |
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} |
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#endif |
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#ifdef CONFIG_SPE |
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extern void enable_kernel_spe(void); |
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extern void flush_spe_to_thread(struct task_struct *); |
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extern void giveup_spe(struct task_struct *); |
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extern void __giveup_spe(struct task_struct *); |
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static inline void disable_kernel_spe(void) |
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{ |
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msr_check_and_clear(MSR_SPE); |
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} |
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#else |
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static inline void __giveup_spe(struct task_struct *t) { } |
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#endif |
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static inline void clear_task_ebb(struct task_struct *t) |
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{ |
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#ifdef CONFIG_PPC_BOOK3S_64 |
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/* EBB perf events are not inherited, so clear all EBB state. */ |
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t->thread.ebbrr = 0; |
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t->thread.ebbhr = 0; |
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t->thread.bescr = 0; |
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t->thread.mmcr2 = 0; |
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t->thread.mmcr0 = 0; |
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t->thread.siar = 0; |
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t->thread.sdar = 0; |
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t->thread.sier = 0; |
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t->thread.used_ebb = 0; |
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#endif |
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} |
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extern int set_thread_tidr(struct task_struct *t); |
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#endif /* _ASM_POWERPC_SWITCH_TO_H */
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