[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__

#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR

#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)

/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)

#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
#define TIF_FREEZE		18	/* is freezing for suspend */

#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_FREEZE		(1<<TIF_FREEZE)

#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
b69c49b7 FT	14	#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
b69c49b7 FT	15
1da177e4 LT	16	#ifndef __ASSEMBLY__
	17	#include <asm/types.h>
	18	#include <asm/processor.h>
556dcee7	19	#include <arch/thread_info.h>
1da177e4 LT	20	#include <asm/segment.h>
	21	#endif
	22
	23
	24	/*
	25	* low level task data that entry.S needs immediate access to
	26	* - this struct should fit entirely inside of one cache line
	27	* - this struct shares the supervisor stack pages
	28	* - if the contents of this structure are changed, the assembly constants must also be changed
	29	*/
	30	#ifndef __ASSEMBLY__
	31	struct thread_info {
	32	struct task_struct task; / main task structure */
	33	struct exec_domain exec_domain; / execution domain */
	34	unsigned long flags; /* low level flags */
	35	__u32 cpu; /* current CPU */
dcd497f9	36	int preempt_count; /* 0 => preemptable, <0 => BUG */
7b275523	37	__u32 tls; /* TLS for this thread */
1da177e4 LT	38
	39	mm_segment_t addr_limit; /* thread address space:
	40	0-0xBFFFFFFF for user-thead
	41	0-0xFFFFFFFF for kernel-thread
	42	*/
	43	struct restart_block restart_block;
	44	__u8 supervisor_stack[0];
	45	};
	46
	47	#endif
	48
5d01e6ce	49	#define PREEMPT_ACTIVE 0x10000000
1da177e4 LT	50
	51	/*
	52	* macros/functions for gaining access to the thread information structure
1da177e4 LT	53	*/
	54	#ifndef __ASSEMBLY__
	55	#define INIT_THREAD_INFO(tsk) \
	56	{ \
	57	.task = &tsk, \
	58	.exec_domain = &default_exec_domain, \
	59	.flags = 0, \
	60	.cpu = 0, \
c99e6efe	61	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	62	.addr_limit = KERNEL_DS, \
	63	.restart_block = { \
	64	.fn = do_no_restart_syscall, \
	65	}, \
	66	}
	67
	68	#define init_thread_info (init_thread_union.thread_info)
	69
	70	/* thread information allocation */
	71	#define alloc_thread_info(tsk) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
	72	#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
1da177e4 LT	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 LSW
	80	* - other flags in MSW
	81	*/
	82	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
7b275523 JN	83	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	84	#define TIF_SIGPENDING 2 /* signal pending */
	85	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	86	#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
1da177e4 LT	87	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
1da177e4 LT	88	#define TIF_MEMDIE 17
83224b08	89	#define TIF_FREEZE 18 /* is freezing for suspend */
1da177e4 LT	90
1da177e4 LT	91	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
7b275523	92	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
1da177e4 LT	93	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
1da177e4 LT	94	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
7b275523	95	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
1da177e4	96	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
83224b08	97	#define _TIF_FREEZE (1<<TIF_FREEZE)
1da177e4 LT	98
	99	#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
	100	#define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */
	101
	102	#endif /* __KERNEL__ */
	103
	104	#endif /* _ASM_THREAD_INFO_H */