[linux-2.6-block.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>

#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() */
	__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 */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
	__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,			\
	.flags		= 0,			\
	.cpu		= 0,			\
	.addr_limit	= KERNEL_DS,		\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
}

#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_stack_node(tsk, node)	\
		((unsigned long *) ((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_stack_node(tsk, node)	((unsigned long *) 0)
#define task_thread_info(tsk)	((struct thread_info *) 0)
#endif
#define free_thread_stack(ti)	/* nothing */
#define task_stack_page(tsk)	((void *)(tsk))

#define __HAVE_THREAD_FUNCTIONS
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#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 alloc_task_struct_node(node)						\
({										\
	struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP,	\
					     KERNEL_STACK_SIZE_ORDER);		\
	struct task_struct *ret = page ? page_address(page) : NULL;		\
										\
	ret;									\
})
#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_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_RESTORE_RSE		21	/* user RBS is newer than kernel RBS */
#define TIF_POLLING_NRFLAG	22	/* idle is polling for TIF_NEED_RESCHED */

#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_MCA_INIT		(1 << TIF_MCA_INIT)
#define _TIF_DB_DISABLED	(1 << TIF_DB_DISABLED)
#define _TIF_RESTORE_RSE	(1 << TIF_RESTORE_RSE)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)

/* "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_RESTORE_SIGMASK	2	/* restore signal mask in do_signal() */

#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;
	WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
}
static inline void clear_restore_sigmask(void)
{
	current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
}
static inline bool test_restore_sigmask(void)
{
	return current_thread_info()->status & TS_RESTORE_SIGMASK;
}
static inline bool test_and_clear_restore_sigmask(void)
{
	struct thread_info *ti = current_thread_info();
	if (!(ti->status & TS_RESTORE_SIGMASK))
		return false;
	ti->status &= ~TS_RESTORE_SIGMASK;
	return true;
}
#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
1da177e4 LT	14	#ifndef __ASSEMBLY__
	15
	16	/*
	17	* On IA-64, we want to keep the task structure and kernel stack together, so they can be
	18	* mapped by a single TLB entry and so they can be addressed by the "current" pointer
	19	* without having to do pointer masking.
	20	*/
	21	struct thread_info {
	22	struct task_struct task; / XXX not really needed, except for dup_task_struct() */
1da177e4 LT	23	__u32 flags; /* thread_info flags (see TIF_) /
1da177e4 LT	24	__u32 cpu; /* current CPU */
e08e6c52	25	__u32 last_cpu; /* Last CPU thread ran on */
495ab9c0	26	__u32 status; /* Thread synchronous flags */
1da177e4	27	mm_segment_t addr_limit; /* user-level address space limit */
dcd497f9	28	int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
abf917cd	29	#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
b64f34cd HS	30	__u64 ac_stamp;
	31	__u64 ac_leave;
	32	__u64 ac_stime;
	33	__u64 ac_utime;
	34	#endif
1da177e4 LT	35	};
	36
	37	#define THREAD_SIZE KERNEL_STACK_SIZE
	38
	39	#define INIT_THREAD_INFO(tsk) \
	40	{ \
	41	.task = &tsk, \
1da177e4 LT	42	.flags = 0, \
	43	.cpu = 0, \
	44	.addr_limit = KERNEL_DS, \
c99e6efe	45	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	46	}
1da177e4 LT	47
82f1b07b	48	#ifndef ASM_OFFSETS_C
1da177e4 LT	49	/* how to get the thread information struct from C */
1da177e4 LT	50	#define current_thread_info() ((struct thread_info ) ((char ) current + IA64_TASK_SIZE))
b235beea LT	51	#define alloc_thread_stack_node(tsk, node) \
b235beea LT	52	((unsigned long ) ((char ) (tsk) + IA64_TASK_SIZE))
ab03591d	53	#define task_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
82f1b07b TL	54	#else
82f1b07b TL	55	#define current_thread_info() ((struct thread_info *) 0)
b235beea	56	#define alloc_thread_stack_node(tsk, node) ((unsigned long *) 0)
ab03591d	57	#define task_thread_info(tsk) ((struct thread_info *) 0)
82f1b07b	58	#endif
b235beea	59	#define free_thread_stack(ti) /* nothing */
ab03591d AV	60	#define task_stack_page(tsk) ((void *)(tsk))
	61
	62	#define __HAVE_THREAD_FUNCTIONS
abf917cd	63	#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
b64f34cd HS	64	#define setup_thread_stack(p, org) \
	65	task_thread_info(p) = task_thread_info(org); \
	66	task_thread_info(p)->ac_stime = 0; \
	67	task_thread_info(p)->ac_utime = 0; \
	68	task_thread_info(p)->task = (p);
	69	#else
ab03591d AV	70	#define setup_thread_stack(p, org) \
	71	task_thread_info(p) = task_thread_info(org); \
	72	task_thread_info(p)->task = (p);
b64f34cd	73	#endif
ab03591d	74	#define end_of_stack(p) (unsigned long )((void )(p) + IA64_RBS_OFFSET)
1da177e4	75
504f52b5 ED	76	#define alloc_task_struct_node(node) \
	77	({ \
	78	struct page *page = alloc_pages_node(node, GFP_KERNEL \| __GFP_COMP, \
	79	KERNEL_STACK_SIZE_ORDER); \
	80	struct task_struct *ret = page ? page_address(page) : NULL; \
	81	\
f48fea03	82	ret; \
504f52b5	83	})
1da177e4 LT	84	#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
	85
	86	#endif /* !__ASSEMBLY */
	87
	88	/*
	89	* thread information flags
	90	* - these are process state flags that various assembly files may need to access
	91	* - pending work-to-be-done flags are in least-significant 16 bits, other flags
	92	* in top 16 bits
	93	*/
a583f1b5 SE	94	#define TIF_SIGPENDING 0 /* signal pending */
	95	#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
	96	#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
	97	#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
	98	#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
5aa92ffd	99	#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
0ddc9324	100	#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
e619ae0b	101	#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
15029285	102	#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
3b2ce0b1	103	#define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
04075425	104	#define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */
1da177e4 LT	105
	106	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	107	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
90f9d70a	108	#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
90f9d70a	109	#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SINGLESTEP)
5aa92ffd	110	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
1da177e4 LT	111	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
1da177e4 LT	112	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
e619ae0b	113	#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
15029285	114	#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
3b2ce0b1	115	#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
04075425	116	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
1da177e4 LT	117
1da177e4 LT	118	/* "work to do on user-return" bits */
5aa92ffd	119	#define TIF_ALLWORK_MASK (_TIF_SIGPENDING\|_TIF_NOTIFY_RESUME\|_TIF_SYSCALL_AUDIT\|\
49eaeb4b	120	_TIF_NEED_RESCHED\|_TIF_SYSCALL_TRACE)
1da177e4 LT	121	/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
	122	#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT))
	123
848376c7	124	#define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */
495ab9c0	125
848376c7 RM	126	#ifndef __ASSEMBLY__
	127	#define HAVE_SET_RESTORE_SIGMASK 1
	128	static inline void set_restore_sigmask(void)
	129	{
	130	struct thread_info *ti = current_thread_info();
	131	ti->status \|= TS_RESTORE_SIGMASK;
edd63a27	132	WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
848376c7	133	}
4ebefe3e AV	134	static inline void clear_restore_sigmask(void)
	135	{
	136	current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
	137	}
	138	static inline bool test_restore_sigmask(void)
	139	{
	140	return current_thread_info()->status & TS_RESTORE_SIGMASK;
	141	}
	142	static inline bool test_and_clear_restore_sigmask(void)
	143	{
	144	struct thread_info *ti = current_thread_info();
	145	if (!(ti->status & TS_RESTORE_SIGMASK))
	146	return false;
	147	ti->status &= ~TS_RESTORE_SIGMASK;
	148	return true;
	149	}
848376c7 RM	150	#endif /* !__ASSEMBLY__ */
848376c7 RM	151
1da177e4	152	#endif /* _ASM_IA64_THREAD_INFO_H */