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
9struct thread_info {
10	struct task_struct *task;	/* main task structure */
11	struct exec_domain *exec_domain;/* execution domain */
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	struct restart_block restart_block;
17};
18
19#define INIT_THREAD_INFO(tsk)			\
20{						\
21	.task		= &tsk,			\
22	.exec_domain	= &default_exec_domain,	\
23	.flags		= 0,			\
24	.cpu		= 0,			\
25	.addr_limit	= KERNEL_DS,		\
26	.preempt_count	= 1,			\
27  	.restart_block	= {			\
28		.fn = do_no_restart_syscall	\
29	}					\
30}
31
32#define init_thread_info        (init_thread_union.thread_info)
33#define init_stack              (init_thread_union.stack)
34
35/* thread information allocation */
36
37#define THREAD_ORDER            2
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_ORDER)
41#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_ORDER)
42
43#define alloc_thread_info(tsk) ((struct thread_info *) \
44			__get_free_pages(GFP_KERNEL, THREAD_ORDER))
45#define free_thread_info(ti)    free_pages((unsigned long) (ti), THREAD_ORDER)
46
47/* how to get the thread information struct from C */
48#define current_thread_info()	((struct thread_info *)mfctl(30))
49
50#endif /* !__ASSEMBLY */
51
52#define PREEMPT_ACTIVE_BIT	28
53#define PREEMPT_ACTIVE		(1 << PREEMPT_ACTIVE_BIT)
54
55/*
56 * thread information flags
57 */
58#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
59#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */
60#define TIF_SIGPENDING		2	/* signal pending */
61#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
62#define TIF_POLLING_NRFLAG	4	/* true if poll_idle() is polling TIF_NEED_RESCHED */
63#define TIF_32BIT               5       /* 32 bit binary */
64#define TIF_MEMDIE		6
65#define TIF_RESTORE_SIGMASK	7	/* restore saved signal mask */
66
67#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
68#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
69#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
70#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
71#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
72#define _TIF_32BIT		(1 << TIF_32BIT)
73#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
74
75#define _TIF_USER_WORK_MASK     (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
76                                 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
77
78#endif /* __KERNEL__ */
79
80#endif /* _ASM_PARISC_THREAD_INFO_H */
81