[mirror_ubuntu-hirsute-kernel.git] / arch / powerpc / include / asm / switch_to.h

/*
 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
 */
#ifndef _ASM_POWERPC_SWITCH_TO_H
#define _ASM_POWERPC_SWITCH_TO_H

#include <asm/reg.h>

struct thread_struct;
struct task_struct;
struct pt_regs;

extern struct task_struct *__switch_to(struct task_struct *,
	struct task_struct *);
#define switch_to(prev, next, last)	((last) = __switch_to((prev), (next)))

struct thread_struct;
extern struct task_struct *_switch(struct thread_struct *prev,
				   struct thread_struct *next);

extern void enable_kernel_fp(void);
extern void enable_kernel_altivec(void);
extern void enable_kernel_vsx(void);
extern int emulate_altivec(struct pt_regs *);
extern void __giveup_vsx(struct task_struct *);
extern void giveup_vsx(struct task_struct *);
extern void enable_kernel_spe(void);
extern void load_up_spe(struct task_struct *);
extern void giveup_all(struct task_struct *);
extern void flush_all_to_thread(struct task_struct *);
extern void switch_booke_debug_regs(struct debug_reg *new_debug);

#ifdef CONFIG_PPC_FPU
extern void flush_fp_to_thread(struct task_struct *);
extern void giveup_fpu(struct task_struct *);
extern void __giveup_fpu(struct task_struct *);
static inline void disable_kernel_fp(void)
{
	msr_check_and_clear(MSR_FP);
}

#else
static inline void flush_fp_to_thread(struct task_struct *t) { }
static inline void giveup_fpu(struct task_struct *t) { }
static inline void __giveup_fpu(struct task_struct *t) { }
#endif

#ifdef CONFIG_ALTIVEC
extern void flush_altivec_to_thread(struct task_struct *);
extern void giveup_altivec(struct task_struct *);
extern void __giveup_altivec(struct task_struct *);
static inline void disable_kernel_altivec(void)
{
	msr_check_and_clear(MSR_VEC);
}
#else
static inline void flush_altivec_to_thread(struct task_struct *t) { }
static inline void giveup_altivec(struct task_struct *t) { }
static inline void __giveup_altivec(struct task_struct *t) { }
#endif

#ifdef CONFIG_VSX
extern void flush_vsx_to_thread(struct task_struct *);
static inline void disable_kernel_vsx(void)
{
	msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
}
#else
static inline void flush_vsx_to_thread(struct task_struct *t)
{
}
#endif

#ifdef CONFIG_SPE
extern void flush_spe_to_thread(struct task_struct *);
extern void giveup_spe(struct task_struct *);
extern void __giveup_spe(struct task_struct *);
static inline void disable_kernel_spe(void)
{
	msr_check_and_clear(MSR_SPE);
}
#else
static inline void flush_spe_to_thread(struct task_struct *t) { }
static inline void giveup_spe(struct task_struct *t) { }
static inline void __giveup_spe(struct task_struct *t) { }
#endif

static inline void clear_task_ebb(struct task_struct *t)
{
#ifdef CONFIG_PPC_BOOK3S_64
    /* EBB perf events are not inherited, so clear all EBB state. */
    t->thread.ebbrr = 0;
    t->thread.ebbhr = 0;
    t->thread.bescr = 0;
    t->thread.mmcr2 = 0;
    t->thread.mmcr0 = 0;
    t->thread.siar = 0;
    t->thread.sdar = 0;
    t->thread.sier = 0;
    t->thread.used_ebb = 0;
#endif
}

#endif /* _ASM_POWERPC_SWITCH_TO_H */
Commit	Line	Data
ae3a197e DH	1	/*
	2	* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
	3	*/
	4	#ifndef _ASM_POWERPC_SWITCH_TO_H
	5	#define _ASM_POWERPC_SWITCH_TO_H
	6
3eb5d588 AB	7	#include <asm/reg.h>
3eb5d588 AB	8
ae3a197e DH	9	struct thread_struct;
	10	struct task_struct;
	11	struct pt_regs;
	12
	13	extern struct task_struct __switch_to(struct task_struct ,
	14	struct task_struct *);
	15	#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
	16
	17	struct thread_struct;
	18	extern struct task_struct _switch(struct thread_struct prev,
	19	struct thread_struct *next);
	20
ae3a197e	21	extern void enable_kernel_fp(void);
ae3a197e	22	extern void enable_kernel_altivec(void);
72cd7b44	23	extern void enable_kernel_vsx(void);
ae3a197e DH	24	extern int emulate_altivec(struct pt_regs *);
	25	extern void __giveup_vsx(struct task_struct *);
	26	extern void giveup_vsx(struct task_struct *);
	27	extern void enable_kernel_spe(void);
ae3a197e	28	extern void load_up_spe(struct task_struct *);
c2085059	29	extern void giveup_all(struct task_struct *);
579e633e	30	extern void flush_all_to_thread(struct task_struct *);
f5f97210	31	extern void switch_booke_debug_regs(struct debug_reg *new_debug);
ae3a197e	32
037f0eed KH	33	#ifdef CONFIG_PPC_FPU
037f0eed KH	34	extern void flush_fp_to_thread(struct task_struct *);
5f20be44	35	extern void giveup_fpu(struct task_struct *);
98da581e	36	extern void __giveup_fpu(struct task_struct *);
3eb5d588 AB	37	static inline void disable_kernel_fp(void)
	38	{
	39	msr_check_and_clear(MSR_FP);
	40	}
	41
037f0eed KH	42	#else
037f0eed KH	43	static inline void flush_fp_to_thread(struct task_struct *t) { }
5f20be44	44	static inline void giveup_fpu(struct task_struct *t) { }
98da581e	45	static inline void __giveup_fpu(struct task_struct *t) { }
037f0eed KH	46	#endif
037f0eed KH	47
ae3a197e DH	48	#ifdef CONFIG_ALTIVEC
ae3a197e DH	49	extern void flush_altivec_to_thread(struct task_struct *);
8cd3c23d	50	extern void giveup_altivec(struct task_struct *);
98da581e	51	extern void __giveup_altivec(struct task_struct *);
3eb5d588 AB	52	static inline void disable_kernel_altivec(void)
	53	{
	54	msr_check_and_clear(MSR_VEC);
	55	}
ae3a197e	56	#else
98da581e AB	57	static inline void flush_altivec_to_thread(struct task_struct *t) { }
	58	static inline void giveup_altivec(struct task_struct *t) { }
	59	static inline void __giveup_altivec(struct task_struct *t) { }
ae3a197e DH	60	#endif
	61
	62	#ifdef CONFIG_VSX
	63	extern void flush_vsx_to_thread(struct task_struct *);
3eb5d588 AB	64	static inline void disable_kernel_vsx(void)
	65	{
	66	msr_check_and_clear(MSR_FP\|MSR_VEC\|MSR_VSX);
	67	}
ae3a197e DH	68	#else
	69	static inline void flush_vsx_to_thread(struct task_struct *t)
	70	{
	71	}
	72	#endif
	73
	74	#ifdef CONFIG_SPE
	75	extern void flush_spe_to_thread(struct task_struct *);
98da581e AB	76	extern void giveup_spe(struct task_struct *);
98da581e AB	77	extern void __giveup_spe(struct task_struct *);
3eb5d588 AB	78	static inline void disable_kernel_spe(void)
	79	{
	80	msr_check_and_clear(MSR_SPE);
	81	}
ae3a197e	82	#else
98da581e AB	83	static inline void flush_spe_to_thread(struct task_struct *t) { }
	84	static inline void giveup_spe(struct task_struct *t) { }
	85	static inline void __giveup_spe(struct task_struct *t) { }
ae3a197e DH	86	#endif
ae3a197e DH	87
330a1eb7 ME	88	static inline void clear_task_ebb(struct task_struct *t)
	89	{
	90	#ifdef CONFIG_PPC_BOOK3S_64
	91	/* EBB perf events are not inherited, so clear all EBB state. */
3df48c98 ME	92	t->thread.ebbrr = 0;
3df48c98 ME	93	t->thread.ebbhr = 0;
330a1eb7 ME	94	t->thread.bescr = 0;
	95	t->thread.mmcr2 = 0;
	96	t->thread.mmcr0 = 0;
	97	t->thread.siar = 0;
	98	t->thread.sdar = 0;
	99	t->thread.sier = 0;
	100	t->thread.used_ebb = 0;
	101	#endif
	102	}
	103
ae3a197e	104	#endif /* _ASM_POWERPC_SWITCH_TO_H */