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1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2005-2017 Andes Technology Corporation
3 
4 #ifndef __ASM_NDS32_THREAD_INFO_H
5 #define __ASM_NDS32_THREAD_INFO_H
6 
7 #ifdef __KERNEL__
8 
9 #define THREAD_SIZE_ORDER 	(1)
10 #define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)
11 
12 #ifndef __ASSEMBLY__
13 
14 struct task_struct;
15 
16 #include <asm/ptrace.h>
17 #include <asm/types.h>
18 
19 typedef unsigned long mm_segment_t;
20 
21 /*
22  * low level task data that entry.S needs immediate access to.
23  * __switch_to() assumes cpu_context follows immediately after cpu_domain.
24  */
25 struct thread_info {
26 	unsigned long flags;	/* low level flags */
27 	__s32 preempt_count;	/* 0 => preemptable, <0 => bug */
28 	mm_segment_t addr_limit;	/* address limit */
29 };
30 #define INIT_THREAD_INFO(tsk)						\
31 {									\
32 	.preempt_count	= INIT_PREEMPT_COUNT,				\
33 	.addr_limit	= KERNEL_DS,					\
34 }
35 #define thread_saved_pc(tsk) ((unsigned long)(tsk->thread.cpu_context.pc))
36 #define thread_saved_fp(tsk) ((unsigned long)(tsk->thread.cpu_context.fp))
37 #endif
38 
39 /*
40  * thread information flags:
41  *  TIF_SYSCALL_TRACE	- syscall trace active
42  *  TIF_SIGPENDING	- signal pending
43  *  TIF_NEED_RESCHED	- rescheduling necessary
44  *  TIF_NOTIFY_RESUME	- callback before returning to user
45  *  TIF_POLLING_NRFLAG	- true if poll_idle() is polling TIF_NEED_RESCHED
46  */
47 #define TIF_SIGPENDING		1
48 #define TIF_NEED_RESCHED	2
49 #define TIF_SINGLESTEP		3
50 #define TIF_NOTIFY_RESUME	4	/* callback before returning to user */
51 #define TIF_SYSCALL_TRACE	8
52 #define TIF_POLLING_NRFLAG	17
53 #define TIF_MEMDIE		18
54 #define TIF_FREEZE		19
55 #define TIF_RESTORE_SIGMASK	20
56 
57 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
58 #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
59 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
60 #define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
61 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
62 #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
63 #define _TIF_FREEZE		(1 << TIF_FREEZE)
64 #define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
65 
66 /*
67  * Change these and you break ASM code in entry-common.S
68  */
69 #define _TIF_WORK_MASK		0x000000ff
70 #define _TIF_WORK_SYSCALL_ENTRY (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP)
71 #define _TIF_WORK_SYSCALL_LEAVE (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP)
72 
73 #endif /* __KERNEL__ */
74 #endif /* __ASM_NDS32_THREAD_INFO_H */
75