1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_PARISC_THREAD_INFO_H
3#define _ASM_PARISC_THREAD_INFO_H
4
5#ifdef __KERNEL__
6
7#ifndef __ASSEMBLY__
8#include <asm/processor.h>
9#include <asm/special_insns.h>
10
11struct thread_info {
12	struct task_struct *task;	/* main task structure */
13	unsigned long flags;		/* thread_info flags (see TIF_*) */
14	mm_segment_t addr_limit;	/* user-level address space limit */
15	__u32 cpu;			/* current CPU */
16	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
17};
18
19#define INIT_THREAD_INFO(tsk)			\
20{						\
21	.task		= &tsk,			\
22	.flags		= 0,			\
23	.cpu		= 0,			\
24	.addr_limit	= KERNEL_DS,		\
25	.preempt_count	= INIT_PREEMPT_COUNT,	\
26}
27
28/* how to get the thread information struct from C */
29#define current_thread_info()	((struct thread_info *)mfctl(30))
30
31#endif /* !__ASSEMBLY */
32
33/* thread information allocation */
34
35#ifdef CONFIG_IRQSTACKS
36#define THREAD_SIZE_ORDER	2 /* PA-RISC requires at least 16k stack */
37#else
38#define THREAD_SIZE_ORDER	3 /* PA-RISC requires at least 32k stack */
39#endif
40
41/* Be sure to hunt all references to this down when you change the size of
42 * the kernel stack */
43#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
44#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
45
46/*
47 * thread information flags
48 */
49#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
50#define TIF_SIGPENDING		1	/* signal pending */
51#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
52#define TIF_POLLING_NRFLAG	3	/* true if poll_idle() is polling TIF_NEED_RESCHED */
53#define TIF_32BIT               4       /* 32 bit binary */
54#define TIF_MEMDIE		5	/* is terminating due to OOM killer */
55#define TIF_NOTIFY_SIGNAL	6	/* signal notifications exist */
56#define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
57#define TIF_NOTIFY_RESUME	8	/* callback before returning to user */
58#define TIF_SINGLESTEP		9	/* single stepping? */
59#define TIF_BLOCKSTEP		10	/* branch stepping? */
60#define TIF_SECCOMP		11	/* secure computing */
61#define TIF_SYSCALL_TRACEPOINT	12	/* syscall tracepoint instrumentation */
62
63#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
64#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
65#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
66#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
67#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
68#define _TIF_32BIT		(1 << TIF_32BIT)
69#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
70#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
71#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
72#define _TIF_BLOCKSTEP		(1 << TIF_BLOCKSTEP)
73#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
74#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
75
76#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
77                                 _TIF_NEED_RESCHED | _TIF_NOTIFY_SIGNAL)
78#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |	\
79				 _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
80				 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
81
82#ifdef CONFIG_64BIT
83# ifdef CONFIG_COMPAT
84#  define is_32bit_task()	(test_thread_flag(TIF_32BIT))
85# else
86#  define is_32bit_task()	(0)
87# endif
88#else
89# define is_32bit_task()	(1)
90#endif
91
92#endif /* __KERNEL__ */
93
94#endif /* _ASM_PARISC_THREAD_INFO_H */
95