[mirror_ubuntu-zesty-kernel.git] / include / asm-ia64 / 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;
};

#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	= 0,			\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
}

#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
#define setup_thread_stack(p, org) \
	*task_thread_info(p) = *task_thread_info(org); \
	task_thread_info(p)->task = (p);
#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_RESTORE_SIGMASK	5	/* restore signal mask in do_signal() */
#define TIF_PERFMON_WORK	6	/* work for pfm_handle_work() */
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		17
#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_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_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
#define _TIF_PERFMON_WORK	(1 << TIF_PERFMON_WORK)
#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)

/* "work to do on user-return" bits */
#define TIF_ALLWORK_MASK	(_TIF_SIGPENDING|_TIF_PERFMON_WORK|_TIF_SYSCALL_AUDIT|\
				 _TIF_NEED_RESCHED| _TIF_SYSCALL_TRACE|\
				 _TIF_RESTORE_SIGMASK)
/* 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 tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)

#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;
1da177e4 LT	34	};
	35
	36	#define THREAD_SIZE KERNEL_STACK_SIZE
	37
	38	#define INIT_THREAD_INFO(tsk) \
	39	{ \
	40	.task = &tsk, \
	41	.exec_domain = &default_exec_domain, \
	42	.flags = 0, \
	43	.cpu = 0, \
	44	.addr_limit = KERNEL_DS, \
	45	.preempt_count = 0, \
	46	.restart_block = { \
	47	.fn = do_no_restart_syscall, \
	48	}, \
	49	}
	50
82f1b07b	51	#ifndef ASM_OFFSETS_C
1da177e4 LT	52	/* how to get the thread information struct from C */
	53	#define current_thread_info() ((struct thread_info ) ((char ) current + IA64_TASK_SIZE))
	54	#define alloc_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
ab03591d	55	#define task_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
82f1b07b TL	56	#else
	57	#define current_thread_info() ((struct thread_info *) 0)
	58	#define alloc_thread_info(tsk) ((struct thread_info *) 0)
ab03591d	59	#define task_thread_info(tsk) ((struct thread_info *) 0)
82f1b07b	60	#endif
1da177e4	61	#define free_thread_info(ti) /* nothing */
ab03591d AV	62	#define task_stack_page(tsk) ((void *)(tsk))
	63
	64	#define __HAVE_THREAD_FUNCTIONS
	65	#define setup_thread_stack(p, org) \
	66	task_thread_info(p) = task_thread_info(org); \
	67	task_thread_info(p)->task = (p);
	68	#define end_of_stack(p) (unsigned long )((void )(p) + IA64_RBS_OFFSET)
1da177e4 LT	69
1da177e4 LT	70	#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
36c8b586	71	#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL \| __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
1da177e4 LT	72	#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
	73
	74	#endif /* !__ASSEMBLY */
	75
	76	/*
	77	* thread information flags
	78	* - these are process state flags that various assembly files may need to access
	79	* - pending work-to-be-done flags are in least-significant 16 bits, other flags
	80	* in top 16 bits
	81	*/
a583f1b5 SE	82	#define TIF_SIGPENDING 0 /* signal pending */
	83	#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
	84	#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
	85	#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
	86	#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
	87	#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
	88	#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
1da177e4 LT	89	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
1da177e4 LT	90	#define TIF_MEMDIE 17
e619ae0b	91	#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
15029285	92	#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
8a102eed	93	#define TIF_FREEZE 20 /* is freezing for suspend */
1da177e4 LT	94
	95	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	96	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
90f9d70a	97	#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
90f9d70a	98	#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SINGLESTEP)
4a177cbf	99	#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
a583f1b5	100	#define _TIF_PERFMON_WORK (1 << TIF_PERFMON_WORK)
1da177e4 LT	101	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
1da177e4 LT	102	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
1da177e4	103	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
e619ae0b	104	#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
15029285	105	#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
8a102eed	106	#define _TIF_FREEZE (1 << TIF_FREEZE)
1da177e4 LT	107
1da177e4 LT	108	/* "work to do on user-return" bits */
a583f1b5 SE	109	#define TIF_ALLWORK_MASK (_TIF_SIGPENDING\|_TIF_PERFMON_WORK\|_TIF_SYSCALL_AUDIT\|\
	110	_TIF_NEED_RESCHED\| _TIF_SYSCALL_TRACE\|\
	111	_TIF_RESTORE_SIGMASK)
1da177e4 LT	112	/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
	113	#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT))
	114
495ab9c0 AK	115	#define TS_POLLING 1 /* true if in idle loop and not sleeping */
495ab9c0 AK	116
c9f4f06d	117	#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
495ab9c0	118
1da177e4	119	#endif /* _ASM_IA64_THREAD_INFO_H */