[deliverable/linux.git] / include / asm-um / thread_info.h

/*
 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#ifndef __UM_THREAD_INFO_H
#define __UM_THREAD_INFO_H

#ifndef __ASSEMBLY__

#include <asm/types.h>
#include <asm/page.h>
#include <asm/uaccess.h>

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 */
	mm_segment_t		addr_limit;	/* thread address space:
					 	   0-0xBFFFFFFF for user
						   0-0xFFFFFFFF for kernel */
	struct restart_block    restart_block;
	struct thread_info	*real_thread;    /* Points to non-IRQ stack */
};

#define INIT_THREAD_INFO(tsk)			\
{						\
	.task =		&tsk,			\
	.exec_domain =	&default_exec_domain,	\
	.flags =		0,		\
	.cpu =		0,			\
	.preempt_count =	1,		\
	.addr_limit =	KERNEL_DS,		\
	.restart_block =  {			\
		.fn =  do_no_restart_syscall,	\
	},					\
	.real_thread = NULL,			\
}

#define init_thread_info	(init_thread_union.thread_info)
#define init_stack		(init_thread_union.stack)

#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
	struct thread_info *ti;
	unsigned long mask = THREAD_SIZE - 1;
	ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
	return ti;
}

#ifdef CONFIG_DEBUG_STACK_USAGE

#define alloc_thread_info(tsk) \
	((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \
						 CONFIG_KERNEL_STACK_ORDER))
#else

/* thread information allocation */
#define alloc_thread_info(tsk) \
	((struct thread_info *) __get_free_pages(GFP_KERNEL, \
						 CONFIG_KERNEL_STACK_ORDER))
#endif

#define free_thread_info(ti) \
	free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)

#endif

#define PREEMPT_ACTIVE		0x10000000

#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_RESTART_BLOCK 	4
#define TIF_MEMDIE	 	5
#define TIF_SYSCALL_AUDIT	6
#define TIF_RESTORE_SIGMASK	7

#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_MEMDIE		(1 << TIF_MEMDIE)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)

#endif
Commit	Line	Data
a5a678c8 JD	1	/*
a5a678c8 JD	2	* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
1da177e4 LT	3	* Licensed under the GPL
	4	*/
	5
	6	#ifndef __UM_THREAD_INFO_H
	7	#define __UM_THREAD_INFO_H
	8
	9	#ifndef __ASSEMBLY__
	10
1da177e4	11	#include <asm/types.h>
8192ab42 JD	12	#include <asm/page.h>
8192ab42 JD	13	#include <asm/uaccess.h>
1da177e4 LT	14
	15	struct thread_info {
	16	struct task_struct task; / main task structure */
	17	struct exec_domain exec_domain; / execution domain */
	18	unsigned long flags; /* low level flags */
	19	__u32 cpu; /* current CPU */
dcd497f9	20	int preempt_count; /* 0 => preemptable,
1da177e4 LT	21	<0 => BUG */
	22	mm_segment_t addr_limit; /* thread address space:
	23	0-0xBFFFFFFF for user
	24	0-0xFFFFFFFF for kernel */
	25	struct restart_block restart_block;
c14b8494	26	struct thread_info real_thread; / Points to non-IRQ stack */
1da177e4 LT	27	};
	28
	29	#define INIT_THREAD_INFO(tsk) \
	30	{ \
4d338e1a AV	31	.task = &tsk, \
	32	.exec_domain = &default_exec_domain, \
	33	.flags = 0, \
	34	.cpu = 0, \
	35	.preempt_count = 1, \
	36	.addr_limit = KERNEL_DS, \
	37	.restart_block = { \
	38	.fn = do_no_restart_syscall, \
1da177e4	39	}, \
c14b8494	40	.real_thread = NULL, \
1da177e4 LT	41	}
	42
	43	#define init_thread_info (init_thread_union.thread_info)
	44	#define init_stack (init_thread_union.stack)
	45
b3461034	46	#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
1da177e4 LT	47	/* how to get the thread information struct from C */
	48	static inline struct thread_info *current_thread_info(void)
	49	{
	50	struct thread_info *ti;
b3461034 PBG	51	unsigned long mask = THREAD_SIZE - 1;
b3461034 PBG	52	ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
1da177e4 LT	53	return ti;
	54	}
	55
e18eecb8 JD	56	#ifdef CONFIG_DEBUG_STACK_USAGE
	57
	58	#define alloc_thread_info(tsk) \
	59	((struct thread_info *) __get_free_pages(GFP_KERNEL \| __GFP_ZERO, \
	60	CONFIG_KERNEL_STACK_ORDER))
	61	#else
	62
1da177e4	63	/* thread information allocation */
1da177e4	64	#define alloc_thread_info(tsk) \
84812217 JD	65	((struct thread_info *) __get_free_pages(GFP_KERNEL, \
84812217 JD	66	CONFIG_KERNEL_STACK_ORDER))
e18eecb8 JD	67	#endif
e18eecb8 JD	68
84812217 JD	69	#define free_thread_info(ti) \
84812217 JD	70	free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)
1da177e4	71
1da177e4 LT	72	#endif
1da177e4 LT	73
affac4bc	74	#define PREEMPT_ACTIVE 0x10000000
1da177e4 LT	75
	76	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
	77	#define TIF_SIGPENDING 1 /* signal pending */
	78	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
a5a678c8 JD	79	#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
a5a678c8 JD	80	* TIF_NEED_RESCHED
1da177e4 LT	81	*/
	82	#define TIF_RESTART_BLOCK 4
	83	#define TIF_MEMDIE 5
79d20b14	84	#define TIF_SYSCALL_AUDIT 6
2fc10620	85	#define TIF_RESTORE_SIGMASK 7
1da177e4 LT	86
	87	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	88	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	89	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	90	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
79d20b14 JD	91	#define _TIF_MEMDIE (1 << TIF_MEMDIE)
79d20b14 JD	92	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
2fc10620	93	#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
1da177e4 LT	94
1da177e4 LT	95	#endif