[deliverable/linux.git] / arch / s390 / include / asm / thread_info.h

/*
 *  S390 version
 *    Copyright IBM Corp. 2002, 2006
 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

/*
 * Size of kernel stack for each process
 */
#ifndef CONFIG_64BIT
#define THREAD_ORDER 1
#define ASYNC_ORDER  1
#else /* CONFIG_64BIT */
#ifndef __SMALL_STACK
#define THREAD_ORDER 2
#define ASYNC_ORDER  2
#else
#define THREAD_ORDER 1
#define ASYNC_ORDER  1
#endif
#endif /* CONFIG_64BIT */

#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;
	unsigned int		system_call;
	__u64			user_timer;
	__u64			system_timer;
	unsigned long		last_break;	/* last breaking-event-address. */
};

/*
 * 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 *) S390_lowcore.thread_info;
}

#define THREAD_SIZE_ORDER THREAD_ORDER

#endif

/*
 * thread information flags bit numbers
 */
#define TIF_SYSCALL		0	/* inside a system call */
#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_PER_TRAP		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	/* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK	19	/* restore signal mask in do_signal() */
#define TIF_SINGLE_STEP		20	/* This task is single stepped */

#define _TIF_SYSCALL		(1<<TIF_SYSCALL)
#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_PER_TRAP		(1<<TIF_PER_TRAP)
#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_SINGLE_STEP	(1<<TIF_SINGLE_STEP)

#ifdef CONFIG_64BIT
#define is_32bit_task()		(test_thread_flag(TIF_31BIT))
#else
#define is_32bit_task()		(1)
#endif

#define PREEMPT_ACTIVE		0x4000000

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4	1	/*
1da177e4	2	* S390 version
a53c8fab	3	* Copyright IBM Corp. 2002, 2006
1da177e4 LT	4	* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
	5	*/
	6
	7	#ifndef _ASM_THREAD_INFO_H
	8	#define _ASM_THREAD_INFO_H
	9
1da177e4 LT	10	/*
	11	* Size of kernel stack for each process
	12	*/
f4815ac6	13	#ifndef CONFIG_64BIT
1da177e4 LT	14	#define THREAD_ORDER 1
1da177e4 LT	15	#define ASYNC_ORDER 1
f4815ac6	16	#else /* CONFIG_64BIT */
1da177e4 LT	17	#ifndef __SMALL_STACK
	18	#define THREAD_ORDER 2
	19	#define ASYNC_ORDER 2
	20	#else
	21	#define THREAD_ORDER 1
	22	#define ASYNC_ORDER 1
	23	#endif
f4815ac6	24	#endif /* CONFIG_64BIT */
1da177e4 LT	25
	26	#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
	27	#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
	28
	29	#ifndef __ASSEMBLY__
1da177e4	30	#include <asm/lowcore.h>
25097bf1 CE	31	#include <asm/page.h>
25097bf1 CE	32	#include <asm/processor.h>
1da177e4 LT	33
	34	/*
	35	* low level task data that entry.S needs immediate access to
	36	* - this struct should fit entirely inside of one cache line
	37	* - this struct shares the supervisor stack pages
	38	* - if the contents of this structure are changed, the assembly constants must also be changed
	39	*/
	40	struct thread_info {
	41	struct task_struct task; / main task structure */
	42	struct exec_domain exec_domain; / execution domain */
	43	unsigned long flags; /* low level flags */
	44	unsigned int cpu; /* current CPU */
dcd497f9	45	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4	46	struct restart_block restart_block;
20b40a79	47	unsigned int system_call;
aa5e97ce MS	48	__u64 user_timer;
aa5e97ce MS	49	__u64 system_timer;
86f2552b	50	unsigned long last_break; /* last breaking-event-address. */
1da177e4 LT	51	};
	52
	53	/*
	54	* macros/functions for gaining access to the thread information structure
	55	*/
	56	#define INIT_THREAD_INFO(tsk) \
	57	{ \
	58	.task = &tsk, \
	59	.exec_domain = &default_exec_domain, \
	60	.flags = 0, \
	61	.cpu = 0, \
c99e6efe	62	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	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
	71	/* how to get the thread information struct from C */
	72	static inline struct thread_info *current_thread_info(void)
	73	{
6432c015	74	return (struct thread_info *) S390_lowcore.thread_info;
1da177e4 LT	75	}
1da177e4 LT	76
b69c49b7	77	#define THREAD_SIZE_ORDER THREAD_ORDER
1da177e4 LT	78
	79	#endif
	80
	81	/*
	82	* thread information flags bit numbers
	83	*/
b6ef5bb3	84	#define TIF_SYSCALL 0 /* inside a system call */
753c4dd6	85	#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
1da177e4 LT	86	#define TIF_SIGPENDING 2 /* signal pending */
1da177e4 LT	87	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
5e9a2692	88	#define TIF_PER_TRAP 6 /* deliver sigtrap on return to user */
77fa2245	89	#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
bcf5cef7 HC	90	#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
	91	#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
	92	#define TIF_SECCOMP 10 /* secure computing */
66700001	93	#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
bebf023d	94	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
1da177e4	95	TIF_NEED_RESCHED */
bebf023d	96	#define TIF_31BIT 17 /* 32bit process */
0ddc9324	97	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
bebf023d	98	#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
5e9a2692	99	#define TIF_SINGLE_STEP 20 /* This task is single stepped */
1da177e4	100
b6ef5bb3	101	#define _TIF_SYSCALL (1<<TIF_SYSCALL)
753c4dd6	102	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
54dfe5dd	103	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
1da177e4 LT	104	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
1da177e4 LT	105	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
5e9a2692	106	#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
77fa2245	107	#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
bcf5cef7 HC	108	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	109	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
	110	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
66700001	111	#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
1da177e4 LT	112	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
1da177e4 LT	113	#define _TIF_31BIT (1<<TIF_31BIT)
80853a8a	114	#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
1da177e4	115
a05c90f1 HC	116	#ifdef CONFIG_64BIT
	117	#define is_32bit_task() (test_thread_flag(TIF_31BIT))
	118	#else
	119	#define is_32bit_task() (1)
	120	#endif
	121
1da177e4 LT	122	#define PREEMPT_ACTIVE 0x4000000
	123
	124	#endif /* _ASM_THREAD_INFO_H */