1#ifndef _ASM_PARISC_THREAD_INFO_H
2#define _ASM_PARISC_THREAD_INFO_H
3
4#ifdef __KERNEL__
5
6#ifndef __ASSEMBLY__
7#include <asm/processor.h>
8#include <asm/special_insns.h>
9
10struct thread_info {
11	struct task_struct *task;	/* main task structure */
12	unsigned long flags;		/* thread_info flags (see TIF_*) */
13	mm_segment_t addr_limit;	/* user-level address space limit */
14	__u32 cpu;			/* current CPU */
15	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
16};
17
18#define INIT_THREAD_INFO(tsk)			\
19{						\
20	.task		= &tsk,			\
21	.flags		= 0,			\
22	.cpu		= 0,			\
23	.addr_limit	= KERNEL_DS,		\
24	.preempt_count	= INIT_PREEMPT_COUNT,	\
25}
26
27#define init_thread_info        (init_thread_union.thread_info)
28#define init_stack              (init_thread_union.stack)
29
30/* how to get the thread information struct from C */
31#define current_thread_info()	((struct thread_info *)mfctl(30))
32
33#endif /* !__ASSEMBLY */
34
35/* thread information allocation */
36
37#define THREAD_SIZE_ORDER	2 /* PA-RISC requires at least 16k stack */
38/* Be sure to hunt all references to this down when you change the size of
39 * the kernel stack */
40#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
41#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
42
43/*
44 * thread information flags
45 */
46#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
47#define TIF_SIGPENDING		1	/* signal pending */
48#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
49#define TIF_POLLING_NRFLAG	3	/* true if poll_idle() is polling TIF_NEED_RESCHED */
50#define TIF_32BIT               4       /* 32 bit binary */
51#define TIF_MEMDIE		5	/* is terminating due to OOM killer */
52#define TIF_RESTORE_SIGMASK	6	/* restore saved signal mask */
53#define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
54#define TIF_NOTIFY_RESUME	8	/* callback before returning to user */
55#define TIF_SINGLESTEP		9	/* single stepping? */
56#define TIF_BLOCKSTEP		10	/* branch stepping? */
57#define TIF_SECCOMP		11	/* secure computing */
58
59#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
60#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
61#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
62#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
63#define _TIF_32BIT		(1 << TIF_32BIT)
64#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
65#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
66#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
67#define _TIF_BLOCKSTEP		(1 << TIF_BLOCKSTEP)
68#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
69
70#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
71                                 _TIF_NEED_RESCHED)
72#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |	\
73				 _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
74				 _TIF_SECCOMP)
75
76#ifdef CONFIG_64BIT
77# ifdef CONFIG_COMPAT
78#  define is_32bit_task()	(test_thread_flag(TIF_32BIT))
79# else
80#  define is_32bit_task()	(0)
81# endif
82#else
83# define is_32bit_task()	(1)
84#endif
85
86#endif /* __KERNEL__ */
87
88#endif /* _ASM_PARISC_THREAD_INFO_H */
89