[mirror_ubuntu-zesty-kernel.git] / include / asm-ppc64 / thread_info.h

/* thread_info.h: PPC low-level thread information
 * adapted from the i386 version by Paul Mackerras
 *
 * 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

#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <linux/config.h>
#include <linux/cache.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <linux/stringify.h>

/*
 * low level task data.
 */
struct thread_info {
	struct task_struct *task;		/* main task structure */
	struct exec_domain *exec_domain;	/* execution domain */
	int		cpu;			/* cpu we're on */
	int		preempt_count;		/* 0 => preemptable, <0 => BUG */
	struct restart_block restart_block;
	/* set by force_successful_syscall_return */
	unsigned char	syscall_noerror;
	/* low level flags - has atomic operations done on it */
	unsigned long	flags ____cacheline_aligned_in_smp;
};

/*
 * macros/functions for gaining access to the thread information structure
 *
 * preempt_count needs to be 1 initially, until the scheduler is functional.
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task =		&tsk,			\
	.exec_domain =	&default_exec_domain,	\
	.cpu =		0,			\
	.preempt_count = 1,			\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
	.flags =	0,			\
}

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

/* thread information allocation */

#define THREAD_SHIFT		14
#define THREAD_ORDER		(THREAD_SHIFT - PAGE_SHIFT)
#define THREAD_SIZE		(1 << THREAD_SHIFT)
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk)					\
	({							\
		struct thread_info *ret;			\
								\
		ret = kmalloc(THREAD_SIZE, GFP_KERNEL);		\
		if (ret)					\
			memset(ret, 0, THREAD_SIZE);		\
		ret;						\
	})
#else
#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
#endif
#define free_thread_info(ti)	kfree(ti)
#define get_thread_info(ti)	get_task_struct((ti)->task)
#define put_thread_info(ti)	put_task_struct((ti)->task)

/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
	struct thread_info *ti;
	__asm__("clrrdi %0,1,%1" : "=r"(ti) : "i" (THREAD_SHIFT));
	return ti;
}

#endif /* __ASSEMBLY__ */

#define PREEMPT_ACTIVE		0x10000000

/*
 * 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_32BIT		5	/* 32 bit binary */
/* #define SPARE		6 */
#define TIF_ABI_PENDING		7	/* 32/64 bit switch needed */
#define TIF_SYSCALL_AUDIT	8	/* syscall auditing active */
#define TIF_SINGLESTEP		9	/* singlestepping active */
#define TIF_MEMDIE		10
#define TIF_SECCOMP		11	/* secure computing */

/* 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)
#define _TIF_32BIT		(1<<TIF_32BIT)
/* #define _SPARE		(1<<SPARE) */
#define _TIF_ABI_PENDING	(1<<TIF_ABI_PENDING)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_SYSCALL_T_OR_A	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)

#define _TIF_USER_WORK_MASK	(_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
				 _TIF_NEED_RESCHED)

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/* thread_info.h: PPC low-level thread information
	2	* adapted from the i386 version by Paul Mackerras
	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	#ifdef __KERNEL__
	12
	13	#ifndef __ASSEMBLY__
	14	#include <linux/config.h>
	15	#include <linux/cache.h>
	16	#include <asm/processor.h>
	17	#include <asm/page.h>
	18	#include <linux/stringify.h>
	19
	20	/*
	21	* low level task data.
	22	*/
	23	struct thread_info {
	24	struct task_struct task; / main task structure */
	25	struct exec_domain exec_domain; / execution domain */
	26	int cpu; /* cpu we're on */
dcd497f9	27	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4 LT	28	struct restart_block restart_block;
	29	/* set by force_successful_syscall_return */
	30	unsigned char syscall_noerror;
	31	/* low level flags - has atomic operations done on it */
	32	unsigned long flags ____cacheline_aligned_in_smp;
	33	};
	34
	35	/*
	36	* macros/functions for gaining access to the thread information structure
	37	*
	38	* preempt_count needs to be 1 initially, until the scheduler is functional.
	39	*/
	40	#define INIT_THREAD_INFO(tsk) \
	41	{ \
	42	.task = &tsk, \
	43	.exec_domain = &default_exec_domain, \
	44	.cpu = 0, \
	45	.preempt_count = 1, \
	46	.restart_block = { \
	47	.fn = do_no_restart_syscall, \
	48	}, \
	49	.flags = 0, \
	50	}
	51
	52	#define init_thread_info (init_thread_union.thread_info)
	53	#define init_stack (init_thread_union.stack)
	54
	55	/* thread information allocation */
	56
637a6ff6 OJ	57	#define THREAD_SHIFT 14
	58	#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
	59	#define THREAD_SIZE (1 << THREAD_SHIFT)
1da177e4 LT	60	#ifdef CONFIG_DEBUG_STACK_USAGE
	61	#define alloc_thread_info(tsk) \
	62	({ \
	63	struct thread_info *ret; \
	64	\
	65	ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
	66	if (ret) \
	67	memset(ret, 0, THREAD_SIZE); \
	68	ret; \
	69	})
	70	#else
	71	#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
	72	#endif
	73	#define free_thread_info(ti) kfree(ti)
	74	#define get_thread_info(ti) get_task_struct((ti)->task)
	75	#define put_thread_info(ti) put_task_struct((ti)->task)
	76
	77	/* how to get the thread information struct from C */
	78	static inline struct thread_info *current_thread_info(void)
	79	{
	80	struct thread_info *ti;
	81	__asm__("clrrdi %0,1,%1" : "=r"(ti) : "i" (THREAD_SHIFT));
	82	return ti;
	83	}
	84
	85	#endif /* __ASSEMBLY__ */
	86
	87	#define PREEMPT_ACTIVE 0x10000000
	88
	89	/*
	90	* thread information flag bit numbers
	91	*/
	92	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
	93	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	94	#define TIF_SIGPENDING 2 /* signal pending */
	95	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	96	#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
	97	TIF_NEED_RESCHED */
	98	#define TIF_32BIT 5 /* 32 bit binary */
6dc2f0c7	99	/* #define SPARE 6 */
1da177e4 LT	100	#define TIF_ABI_PENDING 7 /* 32/64 bit switch needed */
	101	#define TIF_SYSCALL_AUDIT 8 /* syscall auditing active */
	102	#define TIF_SINGLESTEP 9 /* singlestepping active */
	103	#define TIF_MEMDIE 10
	104	#define TIF_SECCOMP 11 /* secure computing */
	105
	106	/* as above, but as bit values */
	107	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	108	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
	109	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	110	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	111	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	112	#define _TIF_32BIT (1<<TIF_32BIT)
6dc2f0c7	113	/* #define _SPARE (1<<SPARE) */
1da177e4 LT	114	#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
	115	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
	116	#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
	117	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
	118	#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SECCOMP)
	119
	120	#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME \| _TIF_SIGPENDING \| \
	121	_TIF_NEED_RESCHED)
	122
	123	#endif /* __KERNEL__ */
	124
	125	#endif /* _ASM_THREAD_INFO_H */