[net-next-2.6.git] / arch / m68k / include / asm / thread_info_no.h

/* thread_info.h: m68knommu low-level thread information
 * adapted from the i386 and PPC versions by Greg Ungerer (gerg@snapgear.com)
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#include <asm/page.h>

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

/*
 * Size of kernel stack for each process. This must be a power of 2...
 */
#ifdef CONFIG_4KSTACKS
#define THREAD_SIZE_ORDER (0)
#else
#define THREAD_SIZE_ORDER (1)
#endif
                                                                                
/*
 * for asm files, THREAD_SIZE is now generated by asm-offsets.c
 */
#define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)

/*
 * low level task data.
 */
struct thread_info {
	struct task_struct *task;		/* main task structure */
	struct exec_domain *exec_domain;	/* execution domain */
	unsigned long	   flags;		/* low level flags */
	int		   cpu;			/* cpu we're on */
	int		   preempt_count;	/* 0 => preemptable, <0 => BUG */
	struct restart_block restart_block;
};

/*
 * 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,			\
	.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)
{
	struct thread_info *ti;
	__asm__(
		"move.l	%%sp, %0 \n\t"
		"and.l	%1, %0"
		: "=&d"(ti)
		: "di" (~(THREAD_SIZE-1))
		);
	return ti;
}

#endif /* __ASSEMBLY__ */

#define	PREEMPT_ACTIVE	0x4000000

/*
 * thread information flag bit numbers
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_POLLING_NRFLAG	3	/* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_MEMDIE		4
#define TIF_FREEZE		16	/* is freezing for suspend */

/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
#define _TIF_FREEZE		(1<<TIF_FREEZE)

#define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/* thread_info.h: m68knommu low-level thread information
	2	* adapted from the i386 and PPC versions by Greg Ungerer (gerg@snapgear.com)
	3	*
	4	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	5	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	6	*/
	7
	8	#ifndef _ASM_THREAD_INFO_H
	9	#define _ASM_THREAD_INFO_H
	10
	11	#include <asm/page.h>
	12
	13	#ifdef __KERNEL__
	14
	15	#ifndef __ASSEMBLY__
	16
	17	/*
	18	* Size of kernel stack for each process. This must be a power of 2...
	19	*/
	20	#ifdef CONFIG_4KSTACKS
	21	#define THREAD_SIZE_ORDER (0)
	22	#else
	23	#define THREAD_SIZE_ORDER (1)
	24	#endif
	25
	26	/*
	27	* for asm files, THREAD_SIZE is now generated by asm-offsets.c
	28	*/
	29	#define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)
	30
	31	/*
	32	* low level task data.
	33	*/
	34	struct thread_info {
	35	struct task_struct task; / main task structure */
	36	struct exec_domain exec_domain; / execution domain */
	37	unsigned long flags; /* low level flags */
	38	int cpu; /* cpu we're on */
dcd497f9	39	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4 LT	40	struct restart_block restart_block;
	41	};
	42
	43	/*
	44	* macros/functions for gaining access to the thread information structure
	45	*/
	46	#define INIT_THREAD_INFO(tsk) \
	47	{ \
	48	.task = &tsk, \
	49	.exec_domain = &default_exec_domain, \
	50	.flags = 0, \
	51	.cpu = 0, \
	52	.restart_block = { \
	53	.fn = do_no_restart_syscall, \
	54	}, \
	55	}
	56
	57	#define init_thread_info (init_thread_union.thread_info)
	58	#define init_stack (init_thread_union.stack)
	59
	60
	61	/* how to get the thread information struct from C */
	62	static inline struct thread_info *current_thread_info(void)
	63	{
	64	struct thread_info *ti;
	65	__asm__(
	66	"move.l %%sp, %0 \n\t"
	67	"and.l %1, %0"
	68	: "=&d"(ti)
	69	: "di" (~(THREAD_SIZE-1))
	70	);
	71	return ti;
	72	}
	73
1da177e4 LT	74	#endif /* __ASSEMBLY__ */
	75
	76	#define PREEMPT_ACTIVE 0x4000000
	77
	78	/*
	79	* thread information flag bit numbers
	80	*/
	81	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
a583f1b5 SE	82	#define TIF_SIGPENDING 1 /* signal pending */
	83	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	84	#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
1da177e4	85	TIF_NEED_RESCHED */
a583f1b5	86	#define TIF_MEMDIE 4
83224b08	87	#define TIF_FREEZE 16 /* is freezing for suspend */
1da177e4 LT	88
	89	/* as above, but as bit values */
	90	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
1da177e4 LT	91	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	92	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	93	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
83224b08	94	#define _TIF_FREEZE (1<<TIF_FREEZE)
1da177e4 LT	95
	96	#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
	97
	98	#endif /* __KERNEL__ */
	99
	100	#endif /* _ASM_THREAD_INFO_H */