[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-arm / thread_info.h

/*
 *  linux/include/asm-arm/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 <asm/fpstate.h>

#ifndef __ASSEMBLY__

struct task_struct;
struct exec_domain;

#include <asm/ptrace.h>
#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 */
	__s32			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 */
	__u8			used_cp[16];	/* thread used copro */
	unsigned long		tp_value;
	union fp_state		fpstate;
	union vfp_state		vfpstate;
	struct restart_block	restart_block;
};

#define INIT_THREAD_INFO(tsk)						\
{									\
	.task		= &tsk,						\
	.exec_domain	= &default_exec_domain,				\
	.flags		= 0,						\
	.preempt_count	= 1,						\
	.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)

#define THREAD_SIZE		8192

/*
 * 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));
}

extern struct thread_info *alloc_thread_info(struct task_struct *task);
extern void free_thread_info(struct thread_info *);

#define get_thread_info(ti)	get_task_struct((ti)->task)
#define put_thread_info(ti)	put_task_struct((ti)->task)

#define thread_saved_pc(tsk)	\
	((unsigned long)(pc_pointer((tsk)->thread_info->cpu_context.pc)))
#define thread_saved_fp(tsk)	\
	((unsigned long)((tsk)->thread_info->cpu_context.fp))

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 *);

#endif

/*
 * We use bit 30 of the preempt_count to indicate that kernel
 * preemption is occuring.  See include/asm-arm/hardirq.h.
 */
#define PREEMPT_ACTIVE	0x40000000

/*
 * thread information flags:
 *  TIF_SYSCALL_TRACE	- syscall trace active
 *  TIF_NOTIFY_RESUME	- resumption notification requested
 *  TIF_SIGPENDING	- signal pending
 *  TIF_NEED_RESCHED	- rescheduling necessary
 *  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_NOTIFY_RESUME	0
#define TIF_SIGPENDING		1
#define TIF_NEED_RESCHED	2
#define TIF_SYSCALL_TRACE	8
#define TIF_POLLING_NRFLAG	16
#define TIF_USING_IWMMXT	17
#define TIF_MEMDIE		18

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

/*
 * Change these and you break ASM code in entry-common.S
 */
#define _TIF_WORK_MASK		0x000000ff

#endif /* __KERNEL__ */
#endif /* __ASM_ARM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/asm-arm/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 <asm/fpstate.h>
	16
	17	#ifndef __ASSEMBLY__
	18
	19	struct task_struct;
	20	struct exec_domain;
	21
	22	#include <asm/ptrace.h>
	23	#include <asm/types.h>
	24	#include <asm/domain.h>
	25
	26	typedef unsigned long mm_segment_t;
	27
	28	struct cpu_context_save {
	29	__u32 r4;
	30	__u32 r5;
	31	__u32 r6;
	32	__u32 r7;
	33	__u32 r8;
	34	__u32 r9;
	35	__u32 sl;
	36	__u32 fp;
	37	__u32 sp;
	38	__u32 pc;
	39	__u32 extra[2]; /* Xscale 'acc' register, etc */
	40	};
	41
	42	/*
	43	* low level task data that entry.S needs immediate access to.
	44	* __switch_to() assumes cpu_context follows immediately after cpu_domain.
	45	*/
	46	struct thread_info {
	47	unsigned long flags; /* low level flags */
	48	__s32 preempt_count; /* 0 => preemptable, <0 => bug */
	49	mm_segment_t addr_limit; /* address limit */
	50	struct task_struct task; / main task structure */
	51	struct exec_domain exec_domain; / execution domain */
	52	__u32 cpu; /* cpu */
	53	__u32 cpu_domain; /* cpu domain */
	54	struct cpu_context_save cpu_context; /* cpu context */
	55	__u8 used_cp[16]; /* thread used copro */
	56	unsigned long tp_value;
	57	union fp_state fpstate;
	58	union vfp_state vfpstate;
	59	struct restart_block restart_block;
	60	};
	61
	62	#define INIT_THREAD_INFO(tsk) \
	63	{ \
	64	.task = &tsk, \
65	.exec_domain = &default_exec_domain, \
66	.flags = 0, \
67	.preempt_count = 1, \
68	.addr_limit = KERNEL_DS, \
69	.cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) \| \
70	domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) \| \
71	domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
72	.restart_block = { \
73	.fn = do_no_restart_syscall, \
74	}, \
75	}
76
77	#define init_thread_info (init_thread_union.thread_info)
78	#define init_stack (init_thread_union.stack)
79
80	#define THREAD_SIZE 8192
81
82	/*
83	* how to get the thread information struct from C
84	*/
85	static inline struct thread_info *current_thread_info(void) __attribute_const__;
86
87	static inline struct thread_info *current_thread_info(void)
88	{
89	register unsigned long sp asm ("sp");
90	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
91	}
92
93	extern struct thread_info alloc_thread_info(struct task_struct task);
94	extern void free_thread_info(struct thread_info *);
95
96	#define get_thread_info(ti) get_task_struct((ti)->task)
97	#define put_thread_info(ti) put_task_struct((ti)->task)
98
99	#define thread_saved_pc(tsk) \
100	((unsigned long)(pc_pointer((tsk)->thread_info->cpu_context.pc)))
101	#define thread_saved_fp(tsk) \
102	((unsigned long)((tsk)->thread_info->cpu_context.fp))
103
104	extern void iwmmxt_task_disable(struct thread_info *);
105	extern void iwmmxt_task_copy(struct thread_info , void );
106	extern void iwmmxt_task_restore(struct thread_info , void );
107	extern void iwmmxt_task_release(struct thread_info *);
108
109	#endif
110
111	/*
112	* We use bit 30 of the preempt_count to indicate that kernel
113	* preemption is occuring. See include/asm-arm/hardirq.h.
114	*/
115	#define PREEMPT_ACTIVE 0x40000000
116
117	/*
118	* thread information flags:
119	* TIF_SYSCALL_TRACE - syscall trace active
120	* TIF_NOTIFY_RESUME - resumption notification requested
121	* TIF_SIGPENDING - signal pending
122	* TIF_NEED_RESCHED - rescheduling necessary
123	* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
124	* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
125	*/
126	#define TIF_NOTIFY_RESUME 0
127	#define TIF_SIGPENDING 1
128	#define TIF_NEED_RESCHED 2
129	#define TIF_SYSCALL_TRACE 8
130	#define TIF_POLLING_NRFLAG 16
131	#define TIF_USING_IWMMXT 17
132	#define TIF_MEMDIE 18
133
134	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
135	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
136	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
137	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
138	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
139	#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
140
141	/*
142	* Change these and you break ASM code in entry-common.S
143	*/
144	#define _TIF_WORK_MASK 0x000000ff
145
146	#endif /* __KERNEL__ */
147	#endif /* __ASM_ARM_THREAD_INFO_H */