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1/*
2 * OpenRISC Linux
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * OpenRISC implementation:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 * et al.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 */
18
19#ifndef _ASM_THREAD_INFO_H
20#define _ASM_THREAD_INFO_H
21
22#ifdef __KERNEL__
23
24#ifndef __ASSEMBLY__
25#include <asm/types.h>
26#include <asm/processor.h>
27#endif
28
29
30/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
31 * normally, the stack is found by doing something like p + THREAD_SIZE
32 * in or32, a page is 8192 bytes, which seems like a sane size
33 */
34
35#define THREAD_SIZE_ORDER 0
36#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
37
38/*
39 * low level task data that entry.S needs immediate access to
40 * - this struct should fit entirely inside of one cache line
41 * - this struct shares the supervisor stack pages
42 * - if the contents of this structure are changed, the assembly constants
43 * must also be changed
44 */
45#ifndef __ASSEMBLY__
46
47typedef unsigned long mm_segment_t;
48
49struct thread_info {
50 struct task_struct *task; /* main task structure */
51 struct exec_domain *exec_domain; /* execution domain */
52 unsigned long flags; /* low level flags */
53 __u32 cpu; /* current CPU */
54 __s32 preempt_count; /* 0 => preemptable, <0 => BUG */
55
56 mm_segment_t addr_limit; /* thread address space:
57 0-0x7FFFFFFF for user-thead
58 0-0xFFFFFFFF for kernel-thread
59 */
60 struct restart_block restart_block;
61 __u8 supervisor_stack[0];
62
63 /* saved context data */
64 unsigned long ksp;
65};
66#endif
67
68/*
69 * macros/functions for gaining access to the thread information structure
70 *
71 * preempt_count needs to be 1 initially, until the scheduler is functional.
72 */
73#ifndef __ASSEMBLY__
74#define INIT_THREAD_INFO(tsk) \
75{ \
76 .task = &tsk, \
77 .exec_domain = &default_exec_domain, \
78 .flags = 0, \
79 .cpu = 0, \
80 .preempt_count = 1, \
81 .addr_limit = KERNEL_DS, \
82 .restart_block = { \
83 .fn = do_no_restart_syscall, \
84 }, \
85 .ksp = 0, \
86}
87
88#define init_thread_info (init_thread_union.thread_info)
89
90/* how to get the thread information struct from C */
91register struct thread_info *current_thread_info_reg asm("r10");
92#define current_thread_info() (current_thread_info_reg)
93
94#define get_thread_info(ti) get_task_struct((ti)->task)
95#define put_thread_info(ti) put_task_struct((ti)->task)
96
97#endif /* !__ASSEMBLY__ */
98
99/*
100 * thread information flags
101 * these are process state flags that various assembly files may need to
102 * access
103 * - pending work-to-be-done flags are in LSW
104 * - other flags in MSW
105 */
106#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
107#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
108#define TIF_SIGPENDING 2 /* signal pending */
109#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
110#define TIF_SINGLESTEP 4 /* restore singlestep on return to user
111 * mode
112 */
113#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
114#define TIF_RESTORE_SIGMASK 9
115#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling * TIF_NEED_RESCHED
116 */
117#define TIF_MEMDIE 17
118
119#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
120#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
121#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
122#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
123#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
124#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
125#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
126
127
128/* Work to do when returning from interrupt/exception */
129/* For OpenRISC, this is anything in the LSW other than syscall trace */
130#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))
131
132#endif /* __KERNEL__ */
133
134#endif /* _ASM_THREAD_INFO_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * OpenRISC Linux
4 *
5 * Linux architectural port borrowing liberally from similar works of
6 * others. All original copyrights apply as per the original source
7 * declaration.
8 *
9 * OpenRISC implementation:
10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12 * et al.
13 */
14
15#ifndef _ASM_THREAD_INFO_H
16#define _ASM_THREAD_INFO_H
17
18#ifdef __KERNEL__
19
20#ifndef __ASSEMBLY__
21#include <asm/types.h>
22#include <asm/processor.h>
23#endif
24
25
26/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
27 * normally, the stack is found by doing something like p + THREAD_SIZE
28 * in or1k, a page is 8192 bytes, which seems like a sane size
29 */
30
31#define THREAD_SIZE_ORDER 0
32#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
33
34/*
35 * low level task data that entry.S needs immediate access to
36 * - this struct should fit entirely inside of one cache line
37 * - this struct shares the supervisor stack pages
38 * - if the contents of this structure are changed, the assembly constants
39 * must also be changed
40 */
41#ifndef __ASSEMBLY__
42
43struct thread_info {
44 struct task_struct *task; /* main task structure */
45 unsigned long flags; /* low level flags */
46 __u32 cpu; /* current CPU */
47 __s32 preempt_count; /* 0 => preemptable, <0 => BUG */
48
49 __u8 supervisor_stack[0];
50
51 /* saved context data */
52 unsigned long ksp;
53};
54#endif
55
56/*
57 * macros/functions for gaining access to the thread information structure
58 *
59 * preempt_count needs to be 1 initially, until the scheduler is functional.
60 */
61#ifndef __ASSEMBLY__
62#define INIT_THREAD_INFO(tsk) \
63{ \
64 .task = &tsk, \
65 .flags = 0, \
66 .cpu = 0, \
67 .preempt_count = INIT_PREEMPT_COUNT, \
68 .ksp = 0, \
69}
70
71/* how to get the thread information struct from C */
72register struct thread_info *current_thread_info_reg asm("r10");
73#define current_thread_info() (current_thread_info_reg)
74
75#define get_thread_info(ti) get_task_struct((ti)->task)
76#define put_thread_info(ti) put_task_struct((ti)->task)
77
78#endif /* !__ASSEMBLY__ */
79
80/*
81 * thread information flags
82 * these are process state flags that various assembly files may need to
83 * access
84 * - pending work-to-be-done flags are in LSW
85 * - other flags in MSW
86 */
87#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
88#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
89#define TIF_SIGPENDING 2 /* signal pending */
90#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
91#define TIF_SINGLESTEP 4 /* restore singlestep on return to user
92 * mode
93 */
94#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
95#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
96#define TIF_RESTORE_SIGMASK 9
97#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling * TIF_NEED_RESCHED
98 */
99#define TIF_MEMDIE 17
100
101#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
102#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
103#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
104#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
105#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
106#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
107#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
108
109
110/* Work to do when returning from interrupt/exception */
111/* For OpenRISC, this is anything in the LSW other than syscall trace */
112#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))
113
114#endif /* __KERNEL__ */
115
116#endif /* _ASM_THREAD_INFO_H */