[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm64 / include / asm / thread_info.h

/*
 * Based on arch/arm/include/asm/thread_info.h
 *
 * Copyright (C) 2002 Russell King.
 * Copyright (C) 2012 ARM Ltd.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_THREAD_INFO_H
#define __ASM_THREAD_INFO_H

#ifdef __KERNEL__

#include <linux/compiler.h>

#ifndef CONFIG_ARM64_64K_PAGES
#define THREAD_SIZE_ORDER	1
#endif

#define THREAD_SIZE		8192
#define THREAD_START_SP		(THREAD_SIZE - 16)

#ifndef __ASSEMBLY__

struct task_struct;
struct exec_domain;

#include <asm/types.h>

typedef unsigned long mm_segment_t;

/*
 * 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 */
	mm_segment_t		addr_limit;	/* address limit */
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	struct restart_block	restart_block;
	int			preempt_count;	/* 0 => preemptable, <0 => bug */
	int			cpu;		/* cpu */
};

#define INIT_THREAD_INFO(tsk)						\
{									\
	.task		= &tsk,						\
	.exec_domain	= &default_exec_domain,				\
	.flags		= 0,						\
	.preempt_count	= INIT_PREEMPT_COUNT,				\
	.addr_limit	= KERNEL_DS,					\
	.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)(tsk->thread.cpu_context.pc))
#define thread_saved_sp(tsk)	\
	((unsigned long)(tsk->thread.cpu_context.sp))
#define thread_saved_fp(tsk)	\
	((unsigned long)(tsk->thread.cpu_context.fp))

#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_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_POLLING_NRFLAG	16
#define TIF_MEMDIE		18	/* is terminating due to OOM killer */
#define TIF_FREEZE		19
#define TIF_RESTORE_SIGMASK	20
#define TIF_SINGLESTEP		21
#define TIF_32BIT		22	/* 32bit process */
#define TIF_SWITCH_MM		23	/* 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_32BIT		(1 << TIF_32BIT)

#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
				 _TIF_NOTIFY_RESUME)

#endif /* __KERNEL__ */
#endif /* __ASM_THREAD_INFO_H */
Commit	Line	Data
b3901d54 CM	1	/*
	2	* Based on arch/arm/include/asm/thread_info.h
	3	*
	4	* Copyright (C) 2002 Russell King.
	5	* Copyright (C) 2012 ARM Ltd.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19	#ifndef __ASM_THREAD_INFO_H
	20	#define __ASM_THREAD_INFO_H
	21
	22	#ifdef __KERNEL__
	23
	24	#include <linux/compiler.h>
	25
	26	#ifndef CONFIG_ARM64_64K_PAGES
	27	#define THREAD_SIZE_ORDER 1
	28	#endif
	29
	30	#define THREAD_SIZE 8192
	31	#define THREAD_START_SP (THREAD_SIZE - 16)
	32
	33	#ifndef __ASSEMBLY__
	34
	35	struct task_struct;
	36	struct exec_domain;
	37
	38	#include <asm/types.h>
	39
	40	typedef unsigned long mm_segment_t;
	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	mm_segment_t addr_limit; /* address limit */
	49	struct task_struct task; / main task structure */
	50	struct exec_domain exec_domain; / execution domain */
	51	struct restart_block restart_block;
	52	int preempt_count; /* 0 => preemptable, <0 => bug */
	53	int cpu; /* cpu */
	54	};
	55
	56	#define INIT_THREAD_INFO(tsk) \
	57	{ \
	58	.task = &tsk, \
	59	.exec_domain = &default_exec_domain, \
	60	.flags = 0, \
	61	.preempt_count = INIT_PREEMPT_COUNT, \
	62	.addr_limit = KERNEL_DS, \
	63	.restart_block = { \
	64	.fn = do_no_restart_syscall, \
65	}, \
66	}
67
68	#define init_thread_info (init_thread_union.thread_info)
69	#define init_stack (init_thread_union.stack)
70
71	/*
72	* how to get the thread information struct from C
73	*/
74	static inline struct thread_info *current_thread_info(void) __attribute_const__;
75
76	static inline struct thread_info *current_thread_info(void)
77	{
78	register unsigned long sp asm ("sp");
79	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
80	}
81
82	#define thread_saved_pc(tsk) \
83	((unsigned long)(tsk->thread.cpu_context.pc))
84	#define thread_saved_sp(tsk) \
85	((unsigned long)(tsk->thread.cpu_context.sp))
86	#define thread_saved_fp(tsk) \
87	((unsigned long)(tsk->thread.cpu_context.fp))
88
89	#endif
90
91	/*
92	* We use bit 30 of the preempt_count to indicate that kernel
93	* preemption is occurring. See <asm/hardirq.h>.
94	*/
95	#define PREEMPT_ACTIVE 0x40000000
96
97	/*
98	* thread information flags:
99	* TIF_SYSCALL_TRACE - syscall trace active
100	* TIF_SIGPENDING - signal pending
101	* TIF_NEED_RESCHED - rescheduling necessary
102	* TIF_NOTIFY_RESUME - callback before returning to user
103	* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
104	* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
105	*/
106	#define TIF_SIGPENDING 0
107	#define TIF_NEED_RESCHED 1
108	#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
109	#define TIF_SYSCALL_TRACE 8
110	#define TIF_POLLING_NRFLAG 16
111	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
112	#define TIF_FREEZE 19
113	#define TIF_RESTORE_SIGMASK 20
114	#define TIF_SINGLESTEP 21
115	#define TIF_32BIT 22 /* 32bit process */
116	#define TIF_SWITCH_MM 23 /* deferred switch_mm */
117
118	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
119	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
120	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
121	#define _TIF_32BIT (1 << TIF_32BIT)
122
123	#define _TIF_WORK_MASK (_TIF_NEED_RESCHED \| _TIF_SIGPENDING \| \
124	_TIF_NOTIFY_RESUME)
125
126	#endif /* __KERNEL__ */
127	#endif /* __ASM_THREAD_INFO_H */