[deliverable/linux.git] / arch / sparc / include / asm / thread_info_64.h

/* thread_info.h: sparc64 low-level thread information
 *
 * Copyright (C) 2002  David S. Miller (davem@redhat.com)
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

#define NSWINS		7

#define TI_FLAG_BYTE_FAULT_CODE		0
#define TI_FLAG_FAULT_CODE_SHIFT	56
#define TI_FLAG_BYTE_WSTATE		1
#define TI_FLAG_WSTATE_SHIFT		48
#define TI_FLAG_BYTE_CWP		2
#define TI_FLAG_CWP_SHIFT		40
#define TI_FLAG_BYTE_CURRENT_DS		3
#define TI_FLAG_CURRENT_DS_SHIFT	32
#define TI_FLAG_BYTE_FPDEPTH		4
#define TI_FLAG_FPDEPTH_SHIFT		24
#define TI_FLAG_BYTE_WSAVED		5
#define TI_FLAG_WSAVED_SHIFT		16

#include <asm/page.h>

#ifndef __ASSEMBLY__

#include <asm/ptrace.h>
#include <asm/types.h>

struct task_struct;
struct exec_domain;

struct thread_info {
	/* D$ line 1 */
	struct task_struct	*task;
	unsigned long		flags;
	__u8			fpsaved[7];
	__u8			status;
	unsigned long		ksp;

	/* D$ line 2 */
	unsigned long		fault_address;
	struct pt_regs		*kregs;
	struct exec_domain	*exec_domain;
	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
	__u8			new_child;
	__u8			syscall_noerror;
	__u16			cpu;

	unsigned long		*utraps;

	struct reg_window 	reg_window[NSWINS];
	unsigned long 		rwbuf_stkptrs[NSWINS];

	unsigned long		gsr[7];
	unsigned long		xfsr[7];

	struct restart_block	restart_block;

	struct pt_regs		*kern_una_regs;
	unsigned int		kern_una_insn;

	unsigned long		fpregs[0] __attribute__ ((aligned(64)));
};

#endif /* !(__ASSEMBLY__) */

/* offsets into the thread_info struct for assembly code access */
#define TI_TASK		0x00000000
#define TI_FLAGS	0x00000008
#define TI_FAULT_CODE	(TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
#define TI_WSTATE	(TI_FLAGS + TI_FLAG_BYTE_WSTATE)
#define TI_CWP		(TI_FLAGS + TI_FLAG_BYTE_CWP)
#define TI_CURRENT_DS	(TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
#define TI_FPDEPTH	(TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
#define TI_WSAVED	(TI_FLAGS + TI_FLAG_BYTE_WSAVED)
#define TI_FPSAVED	0x00000010
#define TI_KSP		0x00000018
#define TI_FAULT_ADDR	0x00000020
#define TI_KREGS	0x00000028
#define TI_EXEC_DOMAIN	0x00000030
#define TI_PRE_COUNT	0x00000038
#define TI_NEW_CHILD	0x0000003c
#define TI_SYS_NOERROR	0x0000003d
#define TI_CPU		0x0000003e
#define TI_UTRAPS	0x00000040
#define TI_REG_WINDOW	0x00000048
#define TI_RWIN_SPTRS	0x000003c8
#define TI_GSR		0x00000400
#define TI_XFSR		0x00000438
#define TI_RESTART_BLOCK 0x00000470
#define TI_KUNA_REGS	0x000004a0
#define TI_KUNA_INSN	0x000004a8
#define TI_FPREGS	0x000004c0

/* We embed this in the uppermost byte of thread_info->flags */
#define FAULT_CODE_WRITE	0x01	/* Write access, implies D-TLB	   */
#define FAULT_CODE_DTLB		0x02	/* Miss happened in D-TLB	   */
#define FAULT_CODE_ITLB		0x04	/* Miss happened in I-TLB	   */
#define FAULT_CODE_WINFIXUP	0x08	/* Miss happened during spill/fill */
#define FAULT_CODE_BLKCOMMIT	0x10	/* Use blk-commit ASI in copy_page */

#if PAGE_SHIFT == 13
#define THREAD_SIZE (2*PAGE_SIZE)
#define THREAD_SHIFT (PAGE_SHIFT + 1)
#else /* PAGE_SHIFT == 13 */
#define THREAD_SIZE PAGE_SIZE
#define THREAD_SHIFT PAGE_SHIFT
#endif /* PAGE_SHIFT == 13 */

#define PREEMPT_ACTIVE		0x10000000

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

#define INIT_THREAD_INFO(tsk)				\
{							\
	.task		=	&tsk,			\
	.flags		= ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT,	\
	.exec_domain	=	&default_exec_domain,	\
	.preempt_count	=	INIT_PREEMPT_COUNT,	\
	.restart_block	= {				\
		.fn	=	do_no_restart_syscall,	\
	},						\
}

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

/* how to get the thread information struct from C */
register struct thread_info *current_thread_info_reg asm("g6");
#define current_thread_info()	(current_thread_info_reg)

/* thread information allocation */
#if PAGE_SHIFT == 13
#define THREAD_SIZE_ORDER	1
#else /* PAGE_SHIFT == 13 */
#define THREAD_SIZE_ORDER	0
#endif /* PAGE_SHIFT == 13 */

#define __thread_flag_byte_ptr(ti)	\
	((unsigned char *)(&((ti)->flags)))
#define __cur_thread_flag_byte_ptr	__thread_flag_byte_ptr(current_thread_info())

#define get_thread_fault_code()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
#define set_thread_fault_code(val)	(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
#define get_thread_wstate()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
#define set_thread_wstate(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
#define get_thread_cwp()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
#define set_thread_cwp(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
#define get_thread_current_ds()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
#define set_thread_current_ds(val)	(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
#define get_thread_fpdepth()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
#define set_thread_fpdepth(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
#define get_thread_wsaved()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
#define set_thread_wsaved(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))

#endif /* !(__ASSEMBLY__) */

/*
 * Thread information flags, only 16 bits are available as we encode
 * other values into the upper 6 bytes.
 *
 * On trap return we need to test several values:
 *
 * user:	need_resched, notify_resume, sigpending, wsaved
 * kernel:	fpdepth
 *
 * So to check for work in the kernel case we simply load the fpdepth
 * byte out of the flags and test it.  For the user case we encode the
 * lower 3 bytes of flags as follows:
 *	----------------------------------------
 *	| wsaved | flags byte 1 | flags byte 2 |
 *	----------------------------------------
 * This optimizes the user test into:
 *	ldx		[%g6 + TI_FLAGS], REG1
 *	sethi		%hi(_TIF_USER_WORK_MASK), REG2
 *	or		REG2, %lo(_TIF_USER_WORK_MASK), REG2
 *	andcc		REG1, REG2, %g0
 *	be,pt		no_work_to_do
 *	 nop
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
/* flag bit 4 is available */
#define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */
/* flag bit 6 is available */
#define TIF_32BIT		7	/* 32-bit binary */
/* flag bit 8 is available */
#define TIF_SECCOMP		9	/* secure computing */
#define TIF_SYSCALL_AUDIT	10	/* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */
/* NOTE: Thread flags >= 12 should be ones we have no interest
 *       in using in assembly, else we can't use the mask as
 *       an immediate value in instructions such as andcc.
 */
/* flag bit 12 is available */
#define TIF_MEMDIE		13	/* is terminating due to OOM killer */
#define TIF_POLLING_NRFLAG	14

#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_UNALIGNED		(1<<TIF_UNALIGNED)
#define _TIF_32BIT		(1<<TIF_32BIT)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)

#define _TIF_USER_WORK_MASK	((0xff << TI_FLAG_WSAVED_SHIFT) | \
				 _TIF_DO_NOTIFY_RESUME_MASK | \
				 _TIF_NEED_RESCHED)
#define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)

/*
 * Thread-synchronous status.
 *
 * This is different from the flags in that nobody else
 * ever touches our thread-synchronous status, so we don't
 * have to worry about atomic accesses.
 *
 * Note that there are only 8 bits available.
 */
#define TS_RESTORE_SIGMASK	0x0001	/* restore signal mask in do_signal() */

#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK	1
static inline void set_restore_sigmask(void)
{
	struct thread_info *ti = current_thread_info();
	ti->status |= TS_RESTORE_SIGMASK;
	set_bit(TIF_SIGPENDING, &ti->flags);
}
static inline void clear_restore_sigmask(void)
{
	current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
}
static inline bool test_restore_sigmask(void)
{
	return current_thread_info()->status & TS_RESTORE_SIGMASK;
}
static inline bool test_and_clear_restore_sigmask(void)
{
	struct thread_info *ti = current_thread_info();
	if (!(ti->status & TS_RESTORE_SIGMASK))
		return false;
	ti->status &= ~TS_RESTORE_SIGMASK;
	return true;
}
#endif	/* !__ASSEMBLY__ */

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
f5e706ad SR	1	/* thread_info.h: sparc64 low-level thread information
	2	*
	3	* Copyright (C) 2002 David S. Miller (davem@redhat.com)
	4	*/
	5
	6	#ifndef _ASM_THREAD_INFO_H
	7	#define _ASM_THREAD_INFO_H
	8
	9	#ifdef __KERNEL__
	10
	11	#define NSWINS 7
	12
	13	#define TI_FLAG_BYTE_FAULT_CODE 0
	14	#define TI_FLAG_FAULT_CODE_SHIFT 56
	15	#define TI_FLAG_BYTE_WSTATE 1
	16	#define TI_FLAG_WSTATE_SHIFT 48
	17	#define TI_FLAG_BYTE_CWP 2
	18	#define TI_FLAG_CWP_SHIFT 40
	19	#define TI_FLAG_BYTE_CURRENT_DS 3
	20	#define TI_FLAG_CURRENT_DS_SHIFT 32
	21	#define TI_FLAG_BYTE_FPDEPTH 4
	22	#define TI_FLAG_FPDEPTH_SHIFT 24
	23	#define TI_FLAG_BYTE_WSAVED 5
	24	#define TI_FLAG_WSAVED_SHIFT 16
	25
	26	#include <asm/page.h>
	27
	28	#ifndef __ASSEMBLY__
	29
	30	#include <asm/ptrace.h>
	31	#include <asm/types.h>
	32
	33	struct task_struct;
	34	struct exec_domain;
	35
	36	struct thread_info {
	37	/* D$ line 1 */
	38	struct task_struct *task;
	39	unsigned long flags;
	40	__u8 fpsaved[7];
	41	__u8 status;
	42	unsigned long ksp;
	43
	44	/* D$ line 2 */
	45	unsigned long fault_address;
	46	struct pt_regs *kregs;
	47	struct exec_domain *exec_domain;
	48	int preempt_count; /* 0 => preemptable, <0 => BUG */
	49	__u8 new_child;
	50	__u8 syscall_noerror;
	51	__u16 cpu;
	52
	53	unsigned long *utraps;
	54
	55	struct reg_window reg_window[NSWINS];
	56	unsigned long rwbuf_stkptrs[NSWINS];
	57
	58	unsigned long gsr[7];
	59	unsigned long xfsr[7];
	60
f5e706ad SR	61	struct restart_block restart_block;
	62
	63	struct pt_regs *kern_una_regs;
	64	unsigned int kern_una_insn;
	65
	66	unsigned long fpregs[0] __attribute__ ((aligned(64)));
	67	};
	68
	69	#endif /* !(__ASSEMBLY__) */
	70
	71	/* offsets into the thread_info struct for assembly code access */
	72	#define TI_TASK 0x00000000
	73	#define TI_FLAGS 0x00000008
	74	#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
	75	#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
	76	#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
	77	#define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
	78	#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
	79	#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
	80	#define TI_FPSAVED 0x00000010
	81	#define TI_KSP 0x00000018
	82	#define TI_FAULT_ADDR 0x00000020
	83	#define TI_KREGS 0x00000028
	84	#define TI_EXEC_DOMAIN 0x00000030
	85	#define TI_PRE_COUNT 0x00000038
	86	#define TI_NEW_CHILD 0x0000003c
	87	#define TI_SYS_NOERROR 0x0000003d
	88	#define TI_CPU 0x0000003e
	89	#define TI_UTRAPS 0x00000040
	90	#define TI_REG_WINDOW 0x00000048
	91	#define TI_RWIN_SPTRS 0x000003c8
	92	#define TI_GSR 0x00000400
	93	#define TI_XFSR 0x00000438
c7d5a005 DM	94	#define TI_RESTART_BLOCK 0x00000470
	95	#define TI_KUNA_REGS 0x000004a0
	96	#define TI_KUNA_INSN 0x000004a8
	97	#define TI_FPREGS 0x000004c0
f5e706ad SR	98
	99	/* We embed this in the uppermost byte of thread_info->flags */
	100	#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
	101	#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
	102	#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
	103	#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
	104	#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
	105
	106	#if PAGE_SHIFT == 13
	107	#define THREAD_SIZE (2*PAGE_SIZE)
	108	#define THREAD_SHIFT (PAGE_SHIFT + 1)
	109	#else /* PAGE_SHIFT == 13 */
	110	#define THREAD_SIZE PAGE_SIZE
	111	#define THREAD_SHIFT PAGE_SHIFT
	112	#endif /* PAGE_SHIFT == 13 */
	113
6c94b1ee	114	#define PREEMPT_ACTIVE 0x10000000
f5e706ad SR	115
	116	/*
	117	* macros/functions for gaining access to the thread information structure
f5e706ad SR	118	*/
	119	#ifndef __ASSEMBLY__
	120
	121	#define INIT_THREAD_INFO(tsk) \
	122	{ \
	123	.task = &tsk, \
	124	.flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \
	125	.exec_domain = &default_exec_domain, \
c99e6efe	126	.preempt_count = INIT_PREEMPT_COUNT, \
f5e706ad SR	127	.restart_block = { \
	128	.fn = do_no_restart_syscall, \
	129	}, \
	130	}
	131
	132	#define init_thread_info (init_thread_union.thread_info)
	133	#define init_stack (init_thread_union.stack)
	134
	135	/* how to get the thread information struct from C */
	136	register struct thread_info *current_thread_info_reg asm("g6");
	137	#define current_thread_info() (current_thread_info_reg)
	138
	139	/* thread information allocation */
	140	#if PAGE_SHIFT == 13
66bb4cda	141	#define THREAD_SIZE_ORDER 1
f5e706ad	142	#else /* PAGE_SHIFT == 13 */
66bb4cda	143	#define THREAD_SIZE_ORDER 0
f5e706ad SR	144	#endif /* PAGE_SHIFT == 13 */
f5e706ad SR	145
f5e706ad SR	146	#define __thread_flag_byte_ptr(ti) \
	147	((unsigned char *)(&((ti)->flags)))
	148	#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
	149
	150	#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
	151	#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
	152	#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
	153	#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
	154	#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
	155	#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
	156	#define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
	157	#define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
	158	#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
	159	#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
	160	#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
	161	#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
	162
	163	#endif /* !(__ASSEMBLY__) */
	164
	165	/*
	166	* Thread information flags, only 16 bits are available as we encode
	167	* other values into the upper 6 bytes.
	168	*
	169	* On trap return we need to test several values:
	170	*
c7d5a005	171	* user: need_resched, notify_resume, sigpending, wsaved
f5e706ad SR	172	* kernel: fpdepth
	173	*
	174	* So to check for work in the kernel case we simply load the fpdepth
	175	* byte out of the flags and test it. For the user case we encode the
	176	* lower 3 bytes of flags as follows:
	177	* ----------------------------------------
	178	* \| wsaved \| flags byte 1 \| flags byte 2 \|
	179	* ----------------------------------------
	180	* This optimizes the user test into:
	181	* ldx [%g6 + TI_FLAGS], REG1
	182	* sethi %hi(_TIF_USER_WORK_MASK), REG2
	183	* or REG2, %lo(_TIF_USER_WORK_MASK), REG2
	184	* andcc REG1, REG2, %g0
	185	* be,pt no_work_to_do
	186	* nop
	187	*/
	188	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
e35a8925	189	#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
f5e706ad SR	190	#define TIF_SIGPENDING 2 /* signal pending */
f5e706ad SR	191	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
c7d5a005	192	/* flag bit 4 is available */
f5e706ad SR	193	#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
	194	/* flag bit 6 is available */
	195	#define TIF_32BIT 7 /* 32-bit binary */
	196	/* flag bit 8 is available */
	197	#define TIF_SECCOMP 9 /* secure computing */
	198	#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
c658ad1b	199	#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
f5e706ad SR	200	/* NOTE: Thread flags >= 12 should be ones we have no interest
	201	* in using in assembly, else we can't use the mask as
	202	* an immediate value in instructions such as andcc.
	203	*/
94673e96	204	/* flag bit 12 is available */
0ddc9324	205	#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
f5e706ad SR	206	#define TIF_POLLING_NRFLAG 14
	207
	208	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
e35a8925	209	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
f5e706ad SR	210	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
f5e706ad SR	211	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
f5e706ad SR	212	#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
	213	#define _TIF_32BIT (1<<TIF_32BIT)
	214	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
	215	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
c658ad1b	216	#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
f5e706ad SR	217	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	218
	219	#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) \| \
e35a8925	220	_TIF_DO_NOTIFY_RESUME_MASK \| \
c7d5a005	221	_TIF_NEED_RESCHED)
e35a8925	222	#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME \| _TIF_SIGPENDING)
f5e706ad SR	223
	224	/*
	225	* Thread-synchronous status.
	226	*
	227	* This is different from the flags in that nobody else
	228	* ever touches our thread-synchronous status, so we don't
	229	* have to worry about atomic accesses.
	230	*
	231	* Note that there are only 8 bits available.
	232	*/
	233	#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
	234
	235	#ifndef __ASSEMBLY__
	236	#define HAVE_SET_RESTORE_SIGMASK 1
	237	static inline void set_restore_sigmask(void)
	238	{
	239	struct thread_info *ti = current_thread_info();
	240	ti->status \|= TS_RESTORE_SIGMASK;
	241	set_bit(TIF_SIGPENDING, &ti->flags);
	242	}
4ebefe3e AV	243	static inline void clear_restore_sigmask(void)
	244	{
	245	current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
	246	}
	247	static inline bool test_restore_sigmask(void)
	248	{
	249	return current_thread_info()->status & TS_RESTORE_SIGMASK;
	250	}
	251	static inline bool test_and_clear_restore_sigmask(void)
	252	{
	253	struct thread_info *ti = current_thread_info();
	254	if (!(ti->status & TS_RESTORE_SIGMASK))
	255	return false;
	256	ti->status &= ~TS_RESTORE_SIGMASK;
	257	return true;
	258	}
f5e706ad SR	259	#endif /* !__ASSEMBLY__ */
	260
	261	#endif /* __KERNEL__ */
	262
	263	#endif /* _ASM_THREAD_INFO_H */