[mirror_ubuntu-artful-kernel.git] / include / asm-v850 / thread_info.h

/*
 * include/asm-v850/thread_info.h -- v850 low-level thread information
 *
 *  Copyright (C) 2002  NEC Corporation
 *  Copyright (C) 2002  Miles Bader <miles@gnu.org>
 *  Copyright (C) 2002  David Howells (dhowells@redhat.com)
 *    - Incorporating suggestions made by Linus Torvalds and Dave Miller
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * This file was derived from the PPC version, include/asm-ppc/thread_info.h
 * which was adapted from the i386 version by Paul Mackerras
 */

#ifndef __V850_THREAD_INFO_H__
#define __V850_THREAD_INFO_H__

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

/*
 * low level task data.
 * If you change this, change the TI_* offsets below to match.
 */
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;
};

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

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

/*
 * macros/functions for gaining access to the thread information structure
 */

/* 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__ */


/*
 * Offsets in thread_info structure, used in assembly code
 */
#define TI_TASK		0
#define TI_EXECDOMAIN	4
#define TI_FLAGS	8
#define TI_CPU		12
#define TI_PREEMPT	16

#define PREEMPT_ACTIVE		0x4000000

/*
 * thread information flag bit numbers
 */
#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_POLLING_NRFLAG	4	/* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_MEMDIE		5

/* as above, but as bit values */
#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_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)


/* Size of kernel stack for each process.  */
#define THREAD_SIZE		0x2000

/* The alignment of kernel threads, with thread_info structures at their
   base.  Thus, a pointer for a task's task structure can be derived from
   its kernel stack pointer.  */
#define THREAD_ALIGNMENT	THREAD_SIZE
#define THREAD_MASK		(-THREAD_ALIGNMENT)


#ifdef __ASSEMBLY__

/* Put a pointer to the current thread_info structure into REG.  Note that
   this definition requires THREAD_MASK to be representable as a signed
   16-bit value.  */
#define GET_CURRENT_THREAD(reg)						\
        /* Use `addi' and then `and' instead of just `andi', because	\
	   `addi' sign-extends the immediate value, whereas `andi'	\
	   zero-extends it.  */						\
	addi	THREAD_MASK, r0, reg;					\
	and	sp, reg

#else

/* Return a pointer to the current thread_info structure.  */
static inline struct thread_info *current_thread_info (void)
{
	register unsigned long sp __asm__ ("sp");
	return (struct thread_info *)(sp & THREAD_MASK);
}

#endif /* __ASSEMBLY__ */


#endif /* __KERNEL__ */

#endif /* __V850_THREAD_INFO_H__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-v850/thread_info.h -- v850 low-level thread information
	3	*
	4	* Copyright (C) 2002 NEC Corporation
	5	* Copyright (C) 2002 Miles Bader <miles@gnu.org>
	6	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	7	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	8	*
	9	* This file is subject to the terms and conditions of the GNU General
	10	* Public License. See the file COPYING in the main directory of this
	11	* archive for more details.
	12	*
	13	* This file was derived from the PPC version, include/asm-ppc/thread_info.h
	14	* which was adapted from the i386 version by Paul Mackerras
	15	*/
	16
	17	#ifndef __V850_THREAD_INFO_H__
	18	#define __V850_THREAD_INFO_H__
	19
	20	#ifdef __KERNEL__
	21
	22	#ifndef __ASSEMBLY__
	23
	24	/*
	25	* low level task data.
	26	* If you change this, change the TI_* offsets below to match.
	27	*/
	28	struct thread_info {
	29	struct task_struct task; / main task structure */
	30	struct exec_domain exec_domain; / execution domain */
	31	unsigned long flags; /* low level flags */
	32	int cpu; /* cpu we're on */
dcd497f9 JJ	33	int preempt_count; /* 0 => preemptable,
dcd497f9 JJ	34	<0 => BUG */
1da177e4 LT	35	struct restart_block restart_block;
	36	};
	37
	38	#define INIT_THREAD_INFO(tsk) \
	39	{ \
	40	.task = &tsk, \
	41	.exec_domain = &default_exec_domain, \
	42	.flags = 0, \
	43	.cpu = 0, \
	44	.preempt_count = 1, \
	45	.restart_block = { \
	46	.fn = do_no_restart_syscall, \
	47	}, \
	48	}
	49
	50	#define init_thread_info (init_thread_union.thread_info)
	51	#define init_stack (init_thread_union.stack)
	52
	53	/*
	54	* macros/functions for gaining access to the thread information structure
	55	*/
	56
	57	/* thread information allocation */
	58	#define alloc_thread_info(tsk) ((struct thread_info *) \
	59	__get_free_pages(GFP_KERNEL, 1))
	60	#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
1da177e4 LT	61
	62	#endif /* __ASSEMBLY__ */
	63
	64
	65	/*
	66	* Offsets in thread_info structure, used in assembly code
	67	*/
	68	#define TI_TASK 0
	69	#define TI_EXECDOMAIN 4
	70	#define TI_FLAGS 8
	71	#define TI_CPU 12
	72	#define TI_PREEMPT 16
	73
	74	#define PREEMPT_ACTIVE 0x4000000
	75
	76	/*
	77	* thread information flag bit numbers
	78	*/
	79	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
	80	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	81	#define TIF_SIGPENDING 2 /* signal pending */
	82	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	83	#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
	84	TIF_NEED_RESCHED */
	85	#define TIF_MEMDIE 5
	86
	87	/* as above, but as bit values */
	88	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	89	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
	90	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	91	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	92	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	93
	94
	95	/* Size of kernel stack for each process. */
	96	#define THREAD_SIZE 0x2000
	97
	98	/* The alignment of kernel threads, with thread_info structures at their
	99	base. Thus, a pointer for a task's task structure can be derived from
	100	its kernel stack pointer. */
	101	#define THREAD_ALIGNMENT THREAD_SIZE
	102	#define THREAD_MASK (-THREAD_ALIGNMENT)
	103
	104
	105	#ifdef __ASSEMBLY__
	106
	107	/* Put a pointer to the current thread_info structure into REG. Note that
	108	this definition requires THREAD_MASK to be representable as a signed
	109	16-bit value. */
	110	#define GET_CURRENT_THREAD(reg) \
	111	/* Use `addi' and then `and' instead of just `andi', because \
	112	`addi' sign-extends the immediate value, whereas `andi' \
	113	zero-extends it. */ \
	114	addi THREAD_MASK, r0, reg; \
	115	and sp, reg
	116
	117	#else
	118
	119	/* Return a pointer to the current thread_info structure. */
	120	static inline struct thread_info *current_thread_info (void)
	121	{
	122	register unsigned long sp __asm__ ("sp");
	123	return (struct thread_info *)(sp & THREAD_MASK);
	124	}
125
126	#endif /* __ASSEMBLY__ */
127
128
129	#endif /* __KERNEL__ */
130
131	#endif /* __V850_THREAD_INFO_H__ */