[deliverable/linux.git] / arch / arm / include / asm / thread_info.h

/*
 *  arch/arm/include/asm/thread_info.h
 *
 *  Copyright (C) 2002 Russell King.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_ARM_THREAD_INFO_H
#define __ASM_ARM_THREAD_INFO_H

#ifdef __KERNEL__

#include <linux/compiler.h>
#include <asm/fpstate.h>
#include <asm/page.h>

#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_START_SP		(THREAD_SIZE - 8)

#ifndef __ASSEMBLY__

struct task_struct;
struct exec_domain;

#include <asm/types.h>
#include <asm/domain.h>

typedef unsigned long mm_segment_t;

struct cpu_context_save {
	__u32	r4;
	__u32	r5;
	__u32	r6;
	__u32	r7;
	__u32	r8;
	__u32	r9;
	__u32	sl;
	__u32	fp;
	__u32	sp;
	__u32	pc;
	__u32	extra[2];		/* Xscale 'acc' register, etc */
};

/*
 * low level task data that entry.S needs immediate access to.
 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
 */
struct thread_info {
	unsigned long		flags;		/* low level flags */
	int			preempt_count;	/* 0 => preemptable, <0 => bug */
	mm_segment_t		addr_limit;	/* address limit */
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	__u32			cpu;		/* cpu */
	__u32			cpu_domain;	/* cpu domain */
	struct cpu_context_save	cpu_context;	/* cpu context */
	__u32			syscall;	/* syscall number */
	__u8			used_cp[16];	/* thread used copro */
	unsigned long		tp_value[2];	/* TLS registers */
#ifdef CONFIG_CRUNCH
	struct crunch_state	crunchstate;
#endif
	union fp_state		fpstate __attribute__((aligned(8)));
	union vfp_state		vfpstate;
#ifdef CONFIG_ARM_THUMBEE
	unsigned long		thumbee_state;	/* ThumbEE Handler Base register */
#endif
	struct restart_block	restart_block;
};

#define INIT_THREAD_INFO(tsk)						\
{									\
	.task		= &tsk,						\
	.exec_domain	= &default_exec_domain,				\
	.flags		= 0,						\
	.preempt_count	= INIT_PREEMPT_COUNT,				\
	.addr_limit	= KERNEL_DS,					\
	.cpu_domain	= domain_val(DOMAIN_USER, DOMAIN_MANAGER) |	\
			  domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |	\
			  domain_val(DOMAIN_IO, DOMAIN_CLIENT),		\
	.restart_block	= {						\
		.fn	= do_no_restart_syscall,			\
	},								\
}

#define init_thread_info	(init_thread_union.thread_info)
#define init_stack		(init_thread_union.stack)

/*
 * how to get the current stack pointer in C
 */
register unsigned long current_stack_pointer asm ("sp");

/*
 * how to get the thread information struct from C
 */
static inline struct thread_info *current_thread_info(void) __attribute_const__;

static inline struct thread_info *current_thread_info(void)
{
	return (struct thread_info *)
		(current_stack_pointer & ~(THREAD_SIZE - 1));
}

#define thread_saved_pc(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
#define thread_saved_sp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))

#ifndef CONFIG_THUMB2_KERNEL
#define thread_saved_fp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
#else
#define thread_saved_fp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
#endif

extern void crunch_task_disable(struct thread_info *);
extern void crunch_task_copy(struct thread_info *, void *);
extern void crunch_task_restore(struct thread_info *, void *);
extern void crunch_task_release(struct thread_info *);

extern void iwmmxt_task_disable(struct thread_info *);
extern void iwmmxt_task_copy(struct thread_info *, void *);
extern void iwmmxt_task_restore(struct thread_info *, void *);
extern void iwmmxt_task_release(struct thread_info *);
extern void iwmmxt_task_switch(struct thread_info *);

extern void vfp_sync_hwstate(struct thread_info *);
extern void vfp_flush_hwstate(struct thread_info *);

struct user_vfp;
struct user_vfp_exc;

extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
					   struct user_vfp_exc __user *);
extern int vfp_restore_user_hwstate(struct user_vfp __user *,
				    struct user_vfp_exc __user *);
#endif

/*
 * thread information flags:
 *  TIF_SYSCALL_TRACE	- syscall trace active
 *  TIF_SYSCAL_AUDIT	- syscall auditing active
 *  TIF_SIGPENDING	- signal pending
 *  TIF_NEED_RESCHED	- rescheduling necessary
 *  TIF_NOTIFY_RESUME	- callback before returning to user
 *  TIF_USEDFPU		- FPU was used by this task this quantum (SMP)
 *  TIF_POLLING_NRFLAG	- true if poll_idle() is polling TIF_NEED_RESCHED
 */
#define TIF_SIGPENDING		0
#define TIF_NEED_RESCHED	1
#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */
#define TIF_UPROBE		7
#define TIF_SYSCALL_TRACE	8
#define TIF_SYSCALL_AUDIT	9
#define TIF_SYSCALL_TRACEPOINT	10
#define TIF_SECCOMP		11	/* seccomp syscall filtering active */
#define TIF_NOHZ		12	/* in adaptive nohz mode */
#define TIF_USING_IWMMXT	17
#define TIF_MEMDIE		18	/* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK	20

#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_UPROBE		(1 << TIF_UPROBE)
#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
#define _TIF_USING_IWMMXT	(1 << TIF_USING_IWMMXT)

/* Checks for any syscall work in entry-common.S */
#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
			   _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)

/*
 * Change these and you break ASM code in entry-common.S
 */
#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
				 _TIF_NOTIFY_RESUME | _TIF_UPROBE)

#endif /* __KERNEL__ */
#endif /* __ASM_ARM_THREAD_INFO_H */
Commit	Line	Data
1da177e4	1	/*
4baa9922	2	* arch/arm/include/asm/thread_info.h
1da177e4 LT	3	*
	4	* Copyright (C) 2002 Russell King.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#ifndef __ASM_ARM_THREAD_INFO_H
	11	#define __ASM_ARM_THREAD_INFO_H
	12
	13	#ifdef __KERNEL__
	14
8dc39b88	15	#include <linux/compiler.h>
1da177e4	16	#include <asm/fpstate.h>
9a2b51b6	17	#include <asm/page.h>
1da177e4	18
4f7a1812	19	#define THREAD_SIZE_ORDER 1
9a2b51b6	20	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
4f7a1812 RK	21	#define THREAD_START_SP (THREAD_SIZE - 8)
4f7a1812 RK	22
1da177e4 LT	23	#ifndef __ASSEMBLY__
	24
	25	struct task_struct;
	26	struct exec_domain;
	27
1da177e4 LT	28	#include <asm/types.h>
	29	#include <asm/domain.h>
	30
	31	typedef unsigned long mm_segment_t;
	32
	33	struct cpu_context_save {
	34	__u32 r4;
	35	__u32 r5;
	36	__u32 r6;
	37	__u32 r7;
	38	__u32 r8;
	39	__u32 r9;
	40	__u32 sl;
	41	__u32 fp;
	42	__u32 sp;
	43	__u32 pc;
	44	__u32 extra[2]; /* Xscale 'acc' register, etc */
	45	};
	46
	47	/*
	48	* low level task data that entry.S needs immediate access to.
	49	* __switch_to() assumes cpu_context follows immediately after cpu_domain.
	50	*/
	51	struct thread_info {
	52	unsigned long flags; /* low level flags */
dcd497f9	53	int preempt_count; /* 0 => preemptable, <0 => bug */
1da177e4 LT	54	mm_segment_t addr_limit; /* address limit */
	55	struct task_struct task; / main task structure */
	56	struct exec_domain exec_domain; / execution domain */
	57	__u32 cpu; /* cpu */
	58	__u32 cpu_domain; /* cpu domain */
	59	struct cpu_context_save cpu_context; /* cpu context */
5ba6d3fe	60	__u32 syscall; /* syscall number */
1da177e4	61	__u8 used_cp[16]; /* thread used copro */
a4780ade	62	unsigned long tp_value[2]; /* TLS registers */
9fc31ddc	63	#ifdef CONFIG_CRUNCH
c17fad11	64	struct crunch_state crunchstate;
9fc31ddc	65	#endif
cdaabbd7	66	union fp_state fpstate __attribute__((aligned(8)));
1da177e4	67	union vfp_state vfpstate;
d7f864be CM	68	#ifdef CONFIG_ARM_THUMBEE
	69	unsigned long thumbee_state; /* ThumbEE Handler Base register */
	70	#endif
1da177e4 LT	71	struct restart_block restart_block;
	72	};
	73
	74	#define INIT_THREAD_INFO(tsk) \
	75	{ \
	76	.task = &tsk, \
	77	.exec_domain = &default_exec_domain, \
	78	.flags = 0, \
c99e6efe	79	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	80	.addr_limit = KERNEL_DS, \
	81	.cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) \| \
	82	domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) \| \
	83	domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
	84	.restart_block = { \
	85	.fn = do_no_restart_syscall, \
	86	}, \
	87	}
	88
	89	#define init_thread_info (init_thread_union.thread_info)
	90	#define init_stack (init_thread_union.stack)
	91
0abc08ba BW	92	/*
	93	* how to get the current stack pointer in C
	94	*/
	95	register unsigned long current_stack_pointer asm ("sp");
	96
1da177e4 LT	97	/*
	98	* how to get the thread information struct from C
	99	*/
	100	static inline struct thread_info *current_thread_info(void) __attribute_const__;
	101
	102	static inline struct thread_info *current_thread_info(void)
	103	{
f6c9cbf0 BW	104	return (struct thread_info *)
f6c9cbf0 BW	105	(current_stack_pointer & ~(THREAD_SIZE - 1));
1da177e4 LT	106	}
1da177e4 LT	107
1da177e4	108	#define thread_saved_pc(tsk) \
1de765c1	109	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
2d7c11bf CM	110	#define thread_saved_sp(tsk) \
2d7c11bf CM	111	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
870cbe8c NB	112
870cbe8c NB	113	#ifndef CONFIG_THUMB2_KERNEL
1da177e4	114	#define thread_saved_fp(tsk) \
e7c1b32f	115	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
870cbe8c NB	116	#else
	117	#define thread_saved_fp(tsk) \
	118	((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
	119	#endif
1da177e4	120
c17fad11 LB	121	extern void crunch_task_disable(struct thread_info *);
	122	extern void crunch_task_copy(struct thread_info , void );
	123	extern void crunch_task_restore(struct thread_info , void );
	124	extern void crunch_task_release(struct thread_info *);
	125
1da177e4 LT	126	extern void iwmmxt_task_disable(struct thread_info *);
	127	extern void iwmmxt_task_copy(struct thread_info , void );
	128	extern void iwmmxt_task_restore(struct thread_info , void );
	129	extern void iwmmxt_task_release(struct thread_info *);
ae95bfbb	130	extern void iwmmxt_task_switch(struct thread_info *);
1da177e4	131
ad187f95 RK	132	extern void vfp_sync_hwstate(struct thread_info *);
ad187f95 RK	133	extern void vfp_flush_hwstate(struct thread_info *);
3d1228ea	134
2498814f WD	135	struct user_vfp;
	136	struct user_vfp_exc;
	137
	138	extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
	139	struct user_vfp_exc __user *);
	140	extern int vfp_restore_user_hwstate(struct user_vfp __user *,
	141	struct user_vfp_exc __user *);
1da177e4 LT	142	#endif
1da177e4 LT	143
1da177e4 LT	144	/*
	145	* thread information flags:
	146	* TIF_SYSCALL_TRACE - syscall trace active
29ef73b7	147	* TIF_SYSCAL_AUDIT - syscall auditing active
1da177e4 LT	148	* TIF_SIGPENDING - signal pending
1da177e4 LT	149	* TIF_NEED_RESCHED - rescheduling necessary
d0420c83	150	* TIF_NOTIFY_RESUME - callback before returning to user
1da177e4 LT	151	* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
	152	* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
	153	*/
a583f1b5 SE	154	#define TIF_SIGPENDING 0
a583f1b5 SE	155	#define TIF_NEED_RESCHED 1
d0420c83	156	#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
c7edc9e3	157	#define TIF_UPROBE 7
1da177e4	158	#define TIF_SYSCALL_TRACE 8
29ef73b7	159	#define TIF_SYSCALL_AUDIT 9
1f66e06f	160	#define TIF_SYSCALL_TRACEPOINT 10
9b790d71	161	#define TIF_SECCOMP 11 /* seccomp syscall filtering active */
b0088480	162	#define TIF_NOHZ 12 /* in adaptive nohz mode */
1da177e4	163	#define TIF_USING_IWMMXT 17
0ddc9324	164	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
36984265	165	#define TIF_RESTORE_SIGMASK 20
1da177e4	166
1da177e4 LT	167	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
1da177e4 LT	168	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
d0420c83	169	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
c7edc9e3	170	#define _TIF_UPROBE (1 << TIF_UPROBE)
1da177e4	171	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
29ef73b7	172	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
1f66e06f	173	#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
70c70d97	174	#define _TIF_SECCOMP (1 << TIF_SECCOMP)
9b790d71	175	#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
1da177e4	176
29ef73b7	177	/* Checks for any syscall work in entry-common.S */
9b790d71 KC	178	#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT \| \
9b790d71 KC	179	_TIF_SYSCALL_TRACEPOINT \| _TIF_SECCOMP)
29ef73b7	180
1da177e4 LT	181	/*
	182	* Change these and you break ASM code in entry-common.S
	183	*/
c7edc9e3 DL	184	#define _TIF_WORK_MASK (_TIF_NEED_RESCHED \| _TIF_SIGPENDING \| \
c7edc9e3 DL	185	_TIF_NOTIFY_RESUME \| _TIF_UPROBE)
1da177e4 LT	186
	187	#endif /* __KERNEL__ */
	188	#endif /* __ASM_ARM_THREAD_INFO_H */