[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>

#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		8192
#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;
	struct crunch_state	crunchstate;
	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 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)
{
	register unsigned long sp asm ("sp");
	return (struct thread_info *)(sp & ~(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))
#define thread_saved_fp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))

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

/*
 * We use bit 30 of the preempt_count to indicate that kernel
 * preemption is occurring.  See <asm/hardirq.h>.
 */
#define PREEMPT_ACTIVE	0x40000000

/*
 * 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_SYSCALL_TRACE	8
#define TIF_SYSCALL_AUDIT	9
#define TIF_POLLING_NRFLAG	16
#define TIF_USING_IWMMXT	17
#define TIF_MEMDIE		18	/* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK	20
#define TIF_SECCOMP		21
#define TIF_SWITCH_MM		22	/* deferred switch_mm */

#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
#define _TIF_USING_IWMMXT	(1 << TIF_USING_IWMMXT)
#define _TIF_SECCOMP		(1 << TIF_SECCOMP)

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

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

#endif /* __KERNEL__ */
#endif /* __ASM_ARM_THREAD_INFO_H */
Commit	Line	Data
	1	/*
	2	* arch/arm/include/asm/thread_info.h
	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
	15	#include <linux/compiler.h>
	16	#include <asm/fpstate.h>
	17
	18	#define THREAD_SIZE_ORDER 1
	19	#define THREAD_SIZE 8192
	20	#define THREAD_START_SP (THREAD_SIZE - 8)
	21
	22	#ifndef __ASSEMBLY__
	23
	24	struct task_struct;
	25	struct exec_domain;
	26
	27	#include <asm/types.h>
	28	#include <asm/domain.h>
	29
	30	typedef unsigned long mm_segment_t;
	31
	32	struct cpu_context_save {
	33	__u32 r4;
	34	__u32 r5;
	35	__u32 r6;
	36	__u32 r7;
	37	__u32 r8;
	38	__u32 r9;
	39	__u32 sl;
	40	__u32 fp;
	41	__u32 sp;
	42	__u32 pc;
	43	__u32 extra[2]; /* Xscale 'acc' register, etc */
	44	};
	45
	46	/*
	47	* low level task data that entry.S needs immediate access to.
	48	* __switch_to() assumes cpu_context follows immediately after cpu_domain.
	49	*/
	50	struct thread_info {
	51	unsigned long flags; /* low level flags */
	52	int preempt_count; /* 0 => preemptable, <0 => bug */
	53	mm_segment_t addr_limit; /* address limit */
	54	struct task_struct task; / main task structure */
	55	struct exec_domain exec_domain; / execution domain */
	56	__u32 cpu; /* cpu */
	57	__u32 cpu_domain; /* cpu domain */
	58	struct cpu_context_save cpu_context; /* cpu context */
	59	__u32 syscall; /* syscall number */
	60	__u8 used_cp[16]; /* thread used copro */
	61	unsigned long tp_value;
	62	struct crunch_state crunchstate;
	63	union fp_state fpstate __attribute__((aligned(8)));
	64	union vfp_state vfpstate;
	65	#ifdef CONFIG_ARM_THUMBEE
	66	unsigned long thumbee_state; /* ThumbEE Handler Base register */
	67	#endif
	68	struct restart_block restart_block;
	69	};
	70
	71	#define INIT_THREAD_INFO(tsk) \
	72	{ \
	73	.task = &tsk, \
	74	.exec_domain = &default_exec_domain, \
	75	.flags = 0, \
	76	.preempt_count = INIT_PREEMPT_COUNT, \
	77	.addr_limit = KERNEL_DS, \
	78	.cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) \| \
	79	domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) \| \
	80	domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
	81	.restart_block = { \
	82	.fn = do_no_restart_syscall, \
	83	}, \
	84	}
	85
	86	#define init_thread_info (init_thread_union.thread_info)
	87	#define init_stack (init_thread_union.stack)
	88
	89	/*
	90	* how to get the thread information struct from C
	91	*/
	92	static inline struct thread_info *current_thread_info(void) __attribute_const__;
	93
	94	static inline struct thread_info *current_thread_info(void)
	95	{
	96	register unsigned long sp asm ("sp");
	97	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
	98	}
	99
	100	#define thread_saved_pc(tsk) \
	101	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
	102	#define thread_saved_sp(tsk) \
	103	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
	104	#define thread_saved_fp(tsk) \
	105	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
	106
	107	extern void crunch_task_disable(struct thread_info *);
	108	extern void crunch_task_copy(struct thread_info , void );
	109	extern void crunch_task_restore(struct thread_info , void );
	110	extern void crunch_task_release(struct thread_info *);
	111
	112	extern void iwmmxt_task_disable(struct thread_info *);
	113	extern void iwmmxt_task_copy(struct thread_info , void );
	114	extern void iwmmxt_task_restore(struct thread_info , void );
	115	extern void iwmmxt_task_release(struct thread_info *);
	116	extern void iwmmxt_task_switch(struct thread_info *);
	117
	118	extern void vfp_sync_hwstate(struct thread_info *);
	119	extern void vfp_flush_hwstate(struct thread_info *);
	120
	121	struct user_vfp;
	122	struct user_vfp_exc;
	123
	124	extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
	125	struct user_vfp_exc __user *);
	126	extern int vfp_restore_user_hwstate(struct user_vfp __user *,
	127	struct user_vfp_exc __user *);
	128	#endif
	129
	130	/*
	131	* We use bit 30 of the preempt_count to indicate that kernel
	132	* preemption is occurring. See <asm/hardirq.h>.
	133	*/
	134	#define PREEMPT_ACTIVE 0x40000000
	135
	136	/*
	137	* thread information flags:
	138	* TIF_SYSCALL_TRACE - syscall trace active
	139	* TIF_SYSCAL_AUDIT - syscall auditing active
	140	* TIF_SIGPENDING - signal pending
	141	* TIF_NEED_RESCHED - rescheduling necessary
	142	* TIF_NOTIFY_RESUME - callback before returning to user
	143	* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
	144	* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
	145	*/
	146	#define TIF_SIGPENDING 0
	147	#define TIF_NEED_RESCHED 1
	148	#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
	149	#define TIF_SYSCALL_TRACE 8
	150	#define TIF_SYSCALL_AUDIT 9
	151	#define TIF_POLLING_NRFLAG 16
	152	#define TIF_USING_IWMMXT 17
	153	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
	154	#define TIF_RESTORE_SIGMASK 20
	155	#define TIF_SECCOMP 21
	156	#define TIF_SWITCH_MM 22 /* deferred switch_mm */
	157
	158	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	159	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	160	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
	161	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	162	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
	163	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
	164	#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
	165	#define _TIF_SECCOMP (1 << TIF_SECCOMP)
	166
	167	/* Checks for any syscall work in entry-common.S */
	168	#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT)
	169
	170	/*
	171	* Change these and you break ASM code in entry-common.S
	172	*/
	173	#define _TIF_WORK_MASK (_TIF_NEED_RESCHED \| _TIF_SIGPENDING \| _TIF_NOTIFY_RESUME)
	174
	175	#endif /* __KERNEL__ */
	176	#endif /* __ASM_ARM_THREAD_INFO_H */