[deliverable/linux.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	2
#endif

#define THREAD_SIZE		16384
#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 current stack pointer from 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)
{
	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

/*
 * thread information flags:
 *  TIF_SYSCALL_TRACE	- syscall trace active
 *  TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace
 *  TIF_SYSCALL_AUDIT	- syscall auditing
 *  TIF_SECOMP		- syscall secure computing
 *  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)
 */
#define TIF_SIGPENDING		0
#define TIF_NEED_RESCHED	1
#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */
#define TIF_FOREIGN_FPSTATE	3	/* CPU's FP state is not current's */
#define TIF_NOHZ		7
#define TIF_SYSCALL_TRACE	8
#define TIF_SYSCALL_AUDIT	9
#define TIF_SYSCALL_TRACEPOINT	10
#define TIF_SECCOMP		11
#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_FOREIGN_FPSTATE	(1 << TIF_FOREIGN_FPSTATE)
#define _TIF_NOHZ		(1 << TIF_NOHZ)
#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_32BIT		(1 << TIF_32BIT)

#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
				 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE)

#define _TIF_SYSCALL_WORK	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
				 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
				 _TIF_NOHZ)

#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
845ad05e	27	#define THREAD_SIZE_ORDER 2
b3901d54 CM	28	#endif
b3901d54 CM	29
845ad05e	30	#define THREAD_SIZE 16384
b3901d54 CM	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
3337a10e BW	71	/*
	72	* how to get the current stack pointer from C
	73	*/
	74	register unsigned long current_stack_pointer asm ("sp");
	75
b3901d54 CM	76	/*
	77	* how to get the thread information struct from C
	78	*/
	79	static inline struct thread_info *current_thread_info(void) __attribute_const__;
	80
	81	static inline struct thread_info *current_thread_info(void)
	82	{
	83	register unsigned long sp asm ("sp");
	84	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
	85	}
	86
	87	#define thread_saved_pc(tsk) \
	88	((unsigned long)(tsk->thread.cpu_context.pc))
	89	#define thread_saved_sp(tsk) \
	90	((unsigned long)(tsk->thread.cpu_context.sp))
	91	#define thread_saved_fp(tsk) \
	92	((unsigned long)(tsk->thread.cpu_context.fp))
	93
	94	#endif
	95
b3901d54 CM	96	/*
	97	* thread information flags:
	98	* TIF_SYSCALL_TRACE - syscall trace active
449f81a4 AT	99	* TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace
	100	* TIF_SYSCALL_AUDIT - syscall auditing
	101	* TIF_SECOMP - syscall secure computing
b3901d54 CM	102	* TIF_SIGPENDING - signal pending
	103	* TIF_NEED_RESCHED - rescheduling necessary
	104	* TIF_NOTIFY_RESUME - callback before returning to user
	105	* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
b3901d54 CM	106	*/
	107	#define TIF_SIGPENDING 0
	108	#define TIF_NEED_RESCHED 1
	109	#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
005f78cd	110	#define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */
6c81fe79	111	#define TIF_NOHZ 7
b3901d54	112	#define TIF_SYSCALL_TRACE 8
449f81a4 AT	113	#define TIF_SYSCALL_AUDIT 9
	114	#define TIF_SYSCALL_TRACEPOINT 10
	115	#define TIF_SECCOMP 11
b3901d54 CM	116	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
	117	#define TIF_FREEZE 19
	118	#define TIF_RESTORE_SIGMASK 20
	119	#define TIF_SINGLESTEP 21
	120	#define TIF_32BIT 22 /* 32bit process */
	121	#define TIF_SWITCH_MM 23 /* deferred switch_mm */
	122
	123	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	124	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	125	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
005f78cd	126	#define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE)
6c81fe79	127	#define _TIF_NOHZ (1 << TIF_NOHZ)
449f81a4 AT	128	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	129	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
	130	#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
	131	#define _TIF_SECCOMP (1 << TIF_SECCOMP)
b3901d54 CM	132	#define _TIF_32BIT (1 << TIF_32BIT)
	133
	134	#define _TIF_WORK_MASK (_TIF_NEED_RESCHED \| _TIF_SIGPENDING \| \
005f78cd	135	_TIF_NOTIFY_RESUME \| _TIF_FOREIGN_FPSTATE)
b3901d54	136
449f81a4	137	#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT \| \
6c81fe79 LB	138	_TIF_SYSCALL_TRACEPOINT \| _TIF_SECCOMP \| \
6c81fe79 LB	139	_TIF_NOHZ)
b3901d54 CM	140
	141	#endif /* __KERNEL__ */
	142	#endif /* __ASM_THREAD_INFO_H */