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

/* thread_info.h: CRIS low-level thread information
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
 * 
 * CRIS port by Axis Communications
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <asm/types.h>
#include <asm/processor.h>
#include <arch/thread_info.h>
#include <asm/segment.h>
#endif


/*
 * 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
 */
#ifndef __ASSEMBLY__
struct thread_info {
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	unsigned long		flags;		/* low level flags */
	__u32			cpu;		/* current CPU */
	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
	__u32			tls;		/* TLS for this thread */

	mm_segment_t		addr_limit;	/* thread address space:
					 	   0-0xBFFFFFFF for user-thead
						   0-0xFFFFFFFF for kernel-thread
						*/
	struct restart_block    restart_block;
	__u8			supervisor_stack[0];
};

#endif

#define PREEMPT_ACTIVE		0x10000000

/*
 * macros/functions for gaining access to the thread information structure
 */
#ifndef __ASSEMBLY__
#define INIT_THREAD_INFO(tsk)				\
{							\
	.task		= &tsk,				\
	.exec_domain	= &default_exec_domain,		\
	.flags		= 0,				\
	.cpu		= 0,				\
	.preempt_count	= INIT_PREEMPT_COUNT,		\
	.addr_limit	= KERNEL_DS,			\
	.restart_block = {				\
		       .fn = do_no_restart_syscall,	\
	},						\
}

#define init_thread_info	(init_thread_union.thread_info)

#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 LSW
 * - other flags in MSW
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
#define TIF_RESTORE_SIGMASK	9	/* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		17	/* is terminating due to OOM killer */

#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)

#define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */
#define _TIF_ALLWORK_MASK	0x0000FFFF	/* work to do on any return to u-space */

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/* thread_info.h: CRIS low-level thread information
	2	*
	3	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	4	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	5	*
	6	* CRIS port by Axis Communications
	7	*/
	8
	9	#ifndef _ASM_THREAD_INFO_H
	10	#define _ASM_THREAD_INFO_H
	11
	12	#ifdef __KERNEL__
	13
	14	#ifndef __ASSEMBLY__
	15	#include <asm/types.h>
	16	#include <asm/processor.h>
556dcee7	17	#include <arch/thread_info.h>
1da177e4 LT	18	#include <asm/segment.h>
	19	#endif
	20
	21
	22	/*
	23	* low level task data that entry.S needs immediate access to
	24	* - this struct should fit entirely inside of one cache line
	25	* - this struct shares the supervisor stack pages
	26	* - if the contents of this structure are changed, the assembly constants must also be changed
	27	*/
	28	#ifndef __ASSEMBLY__
	29	struct thread_info {
	30	struct task_struct task; / main task structure */
	31	struct exec_domain exec_domain; / execution domain */
	32	unsigned long flags; /* low level flags */
	33	__u32 cpu; /* current CPU */
dcd497f9	34	int preempt_count; /* 0 => preemptable, <0 => BUG */
7b275523	35	__u32 tls; /* TLS for this thread */
1da177e4 LT	36
	37	mm_segment_t addr_limit; /* thread address space:
	38	0-0xBFFFFFFF for user-thead
	39	0-0xFFFFFFFF for kernel-thread
	40	*/
	41	struct restart_block restart_block;
	42	__u8 supervisor_stack[0];
	43	};
	44
	45	#endif
	46
5d01e6ce	47	#define PREEMPT_ACTIVE 0x10000000
1da177e4 LT	48
	49	/*
	50	* macros/functions for gaining access to the thread information structure
1da177e4 LT	51	*/
	52	#ifndef __ASSEMBLY__
	53	#define INIT_THREAD_INFO(tsk) \
	54	{ \
	55	.task = &tsk, \
	56	.exec_domain = &default_exec_domain, \
	57	.flags = 0, \
	58	.cpu = 0, \
c99e6efe	59	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	60	.addr_limit = KERNEL_DS, \
	61	.restart_block = { \
	62	.fn = do_no_restart_syscall, \
	63	}, \
	64	}
	65
	66	#define init_thread_info (init_thread_union.thread_info)
	67
1da177e4 LT	68	#endif /* !__ASSEMBLY__ */
	69
	70	/*
	71	* thread information flags
	72	* - these are process state flags that various assembly files may need to access
	73	* - pending work-to-be-done flags are in LSW
	74	* - other flags in MSW
	75	*/
	76	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
7b275523 JN	77	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	78	#define TIF_SIGPENDING 2 /* signal pending */
	79	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	80	#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
1da177e4	81	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
0ddc9324	82	#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
1da177e4 LT	83
1da177e4 LT	84	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
7b275523	85	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
1da177e4 LT	86	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
1da177e4 LT	87	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
7b275523	88	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
1da177e4 LT	89	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	90
	91	#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
	92	#define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */
	93
	94	#endif /* __KERNEL__ */
	95
	96	#endif /* _ASM_THREAD_INFO_H */