[net-next-2.6.git] / arch / s390 / include / asm / thread_info.h

/*
 *  include/asm-s390/thread_info.h
 *
 *  S390 version
 *    Copyright (C) IBM Corp. 2002,2006
 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

/*
 * Size of kernel stack for each process
 */
#ifndef __s390x__
#define THREAD_ORDER 1
#define ASYNC_ORDER  1
#else /* __s390x__ */
#ifndef __SMALL_STACK
#define THREAD_ORDER 2
#define ASYNC_ORDER  2
#else
#define THREAD_ORDER 1
#define ASYNC_ORDER  1
#endif
#endif /* __s390x__ */

#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)

#ifndef __ASSEMBLY__
#include <asm/lowcore.h>
#include <asm/page.h>
#include <asm/processor.h>

/*
 * low level task data that entry.S needs immediate access to
 * - this struct should fit entirely inside of one cache line
 * - this struct shares the supervisor stack pages
 * - if the contents of this structure are changed, the assembly constants must also be changed
 */
struct thread_info {
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	unsigned long		flags;		/* low level flags */
	unsigned int		cpu;		/* current CPU */
	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
	struct restart_block	restart_block;
	__u64			user_timer;
	__u64			system_timer;
};

/*
 * macros/functions for gaining access to the thread information structure
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain,	\
	.flags		= 0,			\
	.cpu		= 0,			\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
	.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)
{
	return (struct thread_info *)((*(unsigned long *) __LC_KERNEL_STACK)-THREAD_SIZE);
}

#define THREAD_SIZE_ORDER THREAD_ORDER

#endif

/*
 * thread information flags bit numbers
 */
#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
#define TIF_RESTART_SVC		4	/* restart svc with new svc number */
#define TIF_SINGLE_STEP		6	/* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING	7	/* machine check handling is pending */
#define TIF_SYSCALL_TRACE	8	/* syscall trace active */
#define TIF_SYSCALL_AUDIT	9	/* syscall auditing active */
#define TIF_SECCOMP		10	/* secure computing */
#define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_31BIT		17	/* 32bit process */
#define TIF_MEMDIE		18
#define TIF_RESTORE_SIGMASK	19	/* restore signal mask in do_signal() */
#define TIF_FREEZE		20	/* thread is freezing for suspend */

#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC	(1<<TIF_RESTART_SVC)
#define _TIF_SINGLE_STEP	(1<<TIF_SINGLE_STEP)
#define _TIF_MCCK_PENDING	(1<<TIF_MCCK_PENDING)
#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT		(1<<TIF_31BIT)
#define _TIF_FREEZE		(1<<TIF_FREEZE)

#endif /* __KERNEL__ */

#define PREEMPT_ACTIVE		0x4000000

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-s390/thread_info.h
	3	*
	4	* S390 version
54dfe5dd	5	* Copyright (C) IBM Corp. 2002,2006
1da177e4 LT	6	* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
	7	*/
	8
	9	#ifndef _ASM_THREAD_INFO_H
	10	#define _ASM_THREAD_INFO_H
	11
	12	#ifdef __KERNEL__
	13
	14	/*
	15	* Size of kernel stack for each process
	16	*/
	17	#ifndef __s390x__
1da177e4 LT	18	#define THREAD_ORDER 1
1da177e4 LT	19	#define ASYNC_ORDER 1
1da177e4 LT	20	#else /* __s390x__ */
	21	#ifndef __SMALL_STACK
	22	#define THREAD_ORDER 2
	23	#define ASYNC_ORDER 2
	24	#else
	25	#define THREAD_ORDER 1
	26	#define ASYNC_ORDER 1
	27	#endif
	28	#endif /* __s390x__ */
	29
	30	#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
	31	#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
	32
	33	#ifndef __ASSEMBLY__
1da177e4	34	#include <asm/lowcore.h>
25097bf1 CE	35	#include <asm/page.h>
25097bf1 CE	36	#include <asm/processor.h>
1da177e4 LT	37
	38	/*
	39	* low level task data that entry.S needs immediate access to
	40	* - this struct should fit entirely inside of one cache line
	41	* - this struct shares the supervisor stack pages
	42	* - if the contents of this structure are changed, the assembly constants must also be changed
	43	*/
	44	struct thread_info {
	45	struct task_struct task; / main task structure */
	46	struct exec_domain exec_domain; / execution domain */
	47	unsigned long flags; /* low level flags */
	48	unsigned int cpu; /* current CPU */
dcd497f9	49	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4	50	struct restart_block restart_block;
aa5e97ce MS	51	__u64 user_timer;
aa5e97ce MS	52	__u64 system_timer;
1da177e4 LT	53	};
	54
	55	/*
	56	* macros/functions for gaining access to the thread information structure
	57	*/
	58	#define INIT_THREAD_INFO(tsk) \
	59	{ \
	60	.task = &tsk, \
	61	.exec_domain = &default_exec_domain, \
	62	.flags = 0, \
	63	.cpu = 0, \
c99e6efe	64	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	65	.restart_block = { \
	66	.fn = do_no_restart_syscall, \
	67	}, \
	68	}
	69
	70	#define init_thread_info (init_thread_union.thread_info)
	71	#define init_stack (init_thread_union.stack)
	72
	73	/* how to get the thread information struct from C */
	74	static inline struct thread_info *current_thread_info(void)
	75	{
	76	return (struct thread_info )(((unsigned long *) __LC_KERNEL_STACK)-THREAD_SIZE);
	77	}
	78
b69c49b7	79	#define THREAD_SIZE_ORDER THREAD_ORDER
1da177e4 LT	80
	81	#endif
	82
	83	/*
	84	* thread information flags bit numbers
	85	*/
753c4dd6	86	#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
1da177e4 LT	87	#define TIF_SIGPENDING 2 /* signal pending */
	88	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	89	#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
1da177e4	90	#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
77fa2245	91	#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
bcf5cef7 HC	92	#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
	93	#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
	94	#define TIF_SECCOMP 10 /* secure computing */
66700001	95	#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
bebf023d	96	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
1da177e4	97	TIF_NEED_RESCHED */
bebf023d MS	98	#define TIF_31BIT 17 /* 32bit process */
	99	#define TIF_MEMDIE 18
	100	#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
	101	#define TIF_FREEZE 20 /* thread is freezing for suspend */
1da177e4	102
753c4dd6	103	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
54dfe5dd	104	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
1da177e4 LT	105	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	106	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	107	#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
1da177e4	108	#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
77fa2245	109	#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
bcf5cef7 HC	110	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	111	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
	112	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
66700001	113	#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
1da177e4 LT	114	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
1da177e4 LT	115	#define _TIF_31BIT (1<<TIF_31BIT)
83224b08	116	#define _TIF_FREEZE (1<<TIF_FREEZE)
1da177e4 LT	117
	118	#endif /* __KERNEL__ */
	119
	120	#define PREEMPT_ACTIVE 0x4000000
	121
	122	#endif /* _ASM_THREAD_INFO_H */