[mirror_ubuntu-artful-kernel.git] / arch / ia64 / include / asm / thread_info.h

/*
 * Copyright (C) 2002-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */
#ifndef _ASM_IA64_THREAD_INFO_H
#define _ASM_IA64_THREAD_INFO_H

#ifndef ASM_OFFSETS_C
#include <asm/asm-offsets.h>
#endif
#include <asm/processor.h>
#include <asm/ptrace.h>

#define PREEMPT_ACTIVE_BIT 30
#define PREEMPT_ACTIVE	(1 << PREEMPT_ACTIVE_BIT)

#ifndef __ASSEMBLY__

/*
 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
 * without having to do pointer masking.
 */
struct thread_info {
	struct task_struct *task;	/* XXX not really needed, except for dup_task_struct() */
	struct exec_domain *exec_domain;/* execution domain */
	__u32 flags;			/* thread_info flags (see TIF_*) */
	__u32 cpu;			/* current CPU */
	__u32 last_cpu;			/* Last CPU thread ran on */
	__u32 status;			/* Thread synchronous flags */
	mm_segment_t addr_limit;	/* user-level address space limit */
	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
	struct restart_block restart_block;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
	__u64 ac_stamp;
	__u64 ac_leave;
	__u64 ac_stime;
	__u64 ac_utime;
#endif
};

#define THREAD_SIZE			KERNEL_STACK_SIZE

#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain,	\
	.flags		= 0,			\
	.cpu		= 0,			\
	.addr_limit	= KERNEL_DS,		\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
}

#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR

#ifndef ASM_OFFSETS_C
/* how to get the thread information struct from C */
#define current_thread_info()	((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
#define alloc_thread_info(tsk)	((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
#define task_thread_info(tsk)	((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
#else
#define current_thread_info()	((struct thread_info *) 0)
#define alloc_thread_info(tsk)	((struct thread_info *) 0)
#define task_thread_info(tsk)	((struct thread_info *) 0)
#endif
#define free_thread_info(ti)	/* nothing */
#define task_stack_page(tsk)	((void *)(tsk))

#define __HAVE_THREAD_FUNCTIONS
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
#define setup_thread_stack(p, org)			\
	*task_thread_info(p) = *task_thread_info(org);	\
	task_thread_info(p)->ac_stime = 0;		\
	task_thread_info(p)->ac_utime = 0;		\
	task_thread_info(p)->task = (p);
#else
#define setup_thread_stack(p, org) \
	*task_thread_info(p) = *task_thread_info(org); \
	task_thread_info(p)->task = (p);
#endif
#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)

#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
#define alloc_task_struct()	((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
#define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)

#endif /* !__ASSEMBLY */

/*
 * thread information flags
 * - these are process state flags that various assembly files may need to access
 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
 *   in top 16 bits
 */
#define TIF_SIGPENDING		0	/* signal pending */
#define TIF_NEED_RESCHED	1	/* rescheduling necessary */
#define TIF_SYSCALL_TRACE	2	/* syscall trace active */
#define TIF_SYSCALL_AUDIT	3	/* syscall auditing active */
#define TIF_SINGLESTEP		4	/* restore singlestep on return to user mode */
#define TIF_NOTIFY_RESUME	6	/* resumption notification requested */
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		17	/* is terminating due to OOM killer */
#define TIF_MCA_INIT		18	/* this task is processing MCA or INIT */
#define TIF_DB_DISABLED		19	/* debug trap disabled for fsyscall */
#define TIF_FREEZE		20	/* is freezing for suspend */
#define TIF_RESTORE_RSE		21	/* user RBS is newer than kernel RBS */

#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_TRACEAUDIT	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
#define _TIF_MCA_INIT		(1 << TIF_MCA_INIT)
#define _TIF_DB_DISABLED	(1 << TIF_DB_DISABLED)
#define _TIF_FREEZE		(1 << TIF_FREEZE)
#define _TIF_RESTORE_RSE	(1 << TIF_RESTORE_RSE)

/* "work to do on user-return" bits */
#define TIF_ALLWORK_MASK	(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
				 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
#define TIF_WORK_MASK		(TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))

#define TS_POLLING		1 	/* true if in idle loop and not sleeping */
#define TS_RESTORE_SIGMASK	2	/* restore signal mask in do_signal() */

#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)

#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK	1
static inline void set_restore_sigmask(void)
{
	struct thread_info *ti = current_thread_info();
	ti->status |= TS_RESTORE_SIGMASK;
	set_bit(TIF_SIGPENDING, &ti->flags);
}
#endif	/* !__ASSEMBLY__ */

#endif /* _ASM_IA64_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2002-2003 Hewlett-Packard Co
	3	* David Mosberger-Tang <davidm@hpl.hp.com>
	4	*/
	5	#ifndef _ASM_IA64_THREAD_INFO_H
	6	#define _ASM_IA64_THREAD_INFO_H
	7
82f1b07b	8	#ifndef ASM_OFFSETS_C
0013a854	9	#include <asm/asm-offsets.h>
82f1b07b	10	#endif
1da177e4 LT	11	#include <asm/processor.h>
	12	#include <asm/ptrace.h>
	13
	14	#define PREEMPT_ACTIVE_BIT 30
	15	#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
	16
	17	#ifndef __ASSEMBLY__
	18
	19	/*
	20	* On IA-64, we want to keep the task structure and kernel stack together, so they can be
	21	* mapped by a single TLB entry and so they can be addressed by the "current" pointer
	22	* without having to do pointer masking.
	23	*/
	24	struct thread_info {
	25	struct task_struct task; / XXX not really needed, except for dup_task_struct() */
	26	struct exec_domain exec_domain;/ execution domain */
	27	__u32 flags; /* thread_info flags (see TIF_) /
	28	__u32 cpu; /* current CPU */
e08e6c52	29	__u32 last_cpu; /* Last CPU thread ran on */
495ab9c0	30	__u32 status; /* Thread synchronous flags */
1da177e4	31	mm_segment_t addr_limit; /* user-level address space limit */
dcd497f9	32	int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
1da177e4	33	struct restart_block restart_block;
b64f34cd HS	34	#ifdef CONFIG_VIRT_CPU_ACCOUNTING
	35	__u64 ac_stamp;
	36	__u64 ac_leave;
	37	__u64 ac_stime;
	38	__u64 ac_utime;
	39	#endif
1da177e4 LT	40	};
	41
	42	#define THREAD_SIZE KERNEL_STACK_SIZE
	43
	44	#define INIT_THREAD_INFO(tsk) \
	45	{ \
	46	.task = &tsk, \
	47	.exec_domain = &default_exec_domain, \
	48	.flags = 0, \
	49	.cpu = 0, \
	50	.addr_limit = KERNEL_DS, \
c99e6efe	51	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	52	.restart_block = { \
	53	.fn = do_no_restart_syscall, \
	54	}, \
	55	}
	56
b69c49b7 FT	57	#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
b69c49b7 FT	58
82f1b07b	59	#ifndef ASM_OFFSETS_C
1da177e4 LT	60	/* how to get the thread information struct from C */
	61	#define current_thread_info() ((struct thread_info ) ((char ) current + IA64_TASK_SIZE))
	62	#define alloc_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
ab03591d	63	#define task_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
82f1b07b TL	64	#else
	65	#define current_thread_info() ((struct thread_info *) 0)
	66	#define alloc_thread_info(tsk) ((struct thread_info *) 0)
ab03591d	67	#define task_thread_info(tsk) ((struct thread_info *) 0)
82f1b07b	68	#endif
1da177e4	69	#define free_thread_info(ti) /* nothing */
ab03591d AV	70	#define task_stack_page(tsk) ((void *)(tsk))
	71
	72	#define __HAVE_THREAD_FUNCTIONS
b64f34cd HS	73	#ifdef CONFIG_VIRT_CPU_ACCOUNTING
	74	#define setup_thread_stack(p, org) \
	75	task_thread_info(p) = task_thread_info(org); \
	76	task_thread_info(p)->ac_stime = 0; \
	77	task_thread_info(p)->ac_utime = 0; \
	78	task_thread_info(p)->task = (p);
	79	#else
ab03591d AV	80	#define setup_thread_stack(p, org) \
	81	task_thread_info(p) = task_thread_info(org); \
	82	task_thread_info(p)->task = (p);
b64f34cd	83	#endif
ab03591d	84	#define end_of_stack(p) (unsigned long )((void )(p) + IA64_RBS_OFFSET)
1da177e4 LT	85
1da177e4 LT	86	#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
36c8b586	87	#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL \| __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
1da177e4 LT	88	#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
	89
	90	#endif /* !__ASSEMBLY */
	91
	92	/*
	93	* thread information flags
	94	* - these are process state flags that various assembly files may need to access
	95	* - pending work-to-be-done flags are in least-significant 16 bits, other flags
	96	* in top 16 bits
	97	*/
a583f1b5 SE	98	#define TIF_SIGPENDING 0 /* signal pending */
	99	#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
	100	#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
	101	#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
	102	#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
5aa92ffd	103	#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
1da177e4	104	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
0ddc9324	105	#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
e619ae0b	106	#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
15029285	107	#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
8a102eed	108	#define TIF_FREEZE 20 /* is freezing for suspend */
3b2ce0b1	109	#define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
1da177e4 LT	110
	111	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	112	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
90f9d70a	113	#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
90f9d70a	114	#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SINGLESTEP)
5aa92ffd	115	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
1da177e4 LT	116	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
1da177e4 LT	117	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
1da177e4	118	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
e619ae0b	119	#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
15029285	120	#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
8a102eed	121	#define _TIF_FREEZE (1 << TIF_FREEZE)
3b2ce0b1	122	#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
1da177e4 LT	123
1da177e4 LT	124	/* "work to do on user-return" bits */
5aa92ffd	125	#define TIF_ALLWORK_MASK (_TIF_SIGPENDING\|_TIF_NOTIFY_RESUME\|_TIF_SYSCALL_AUDIT\|\
49eaeb4b	126	_TIF_NEED_RESCHED\|_TIF_SYSCALL_TRACE)
1da177e4 LT	127	/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
	128	#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT))
	129
495ab9c0	130	#define TS_POLLING 1 /* true if in idle loop and not sleeping */
848376c7	131	#define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */
495ab9c0	132
c9f4f06d	133	#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
495ab9c0	134
848376c7 RM	135	#ifndef __ASSEMBLY__
	136	#define HAVE_SET_RESTORE_SIGMASK 1
	137	static inline void set_restore_sigmask(void)
	138	{
	139	struct thread_info *ti = current_thread_info();
	140	ti->status \|= TS_RESTORE_SIGMASK;
	141	set_bit(TIF_SIGPENDING, &ti->flags);
	142	}
	143	#endif /* !__ASSEMBLY__ */
	144
1da177e4	145	#endif /* _ASM_IA64_THREAD_INFO_H */