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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2006 Atmark Techno, Inc.
4 */
5
6#ifndef _ASM_MICROBLAZE_THREAD_INFO_H
7#define _ASM_MICROBLAZE_THREAD_INFO_H
8
9#ifdef __KERNEL__
10
11/* we have 8k stack */
12#define THREAD_SHIFT 13
13#define THREAD_SIZE (1 << THREAD_SHIFT)
14#define THREAD_SIZE_ORDER 1
15
16#ifndef __ASSEMBLY__
17# include <linux/types.h>
18# include <asm/processor.h>
19
20/*
21 * low level task data that entry.S needs immediate access to
22 * - this struct should fit entirely inside of one cache line
23 * - this struct shares the supervisor stack pages
24 * - if the contents of this structure are changed, the assembly constants
25 * must also be changed
26 */
27
28struct cpu_context {
29 __u32 r1; /* stack pointer */
30 __u32 r2;
31 /* dedicated registers */
32 __u32 r13;
33 __u32 r14;
34 __u32 r15;
35 __u32 r16;
36 __u32 r17;
37 __u32 r18;
38 /* non-volatile registers */
39 __u32 r19;
40 __u32 r20;
41 __u32 r21;
42 __u32 r22;
43 __u32 r23;
44 __u32 r24;
45 __u32 r25;
46 __u32 r26;
47 __u32 r27;
48 __u32 r28;
49 __u32 r29;
50 __u32 r30;
51 /* r31 is used as current task pointer */
52 /* special purpose registers */
53 __u32 msr;
54 __u32 ear;
55 __u32 esr;
56 __u32 fsr;
57};
58
59typedef struct {
60 unsigned long seg;
61} mm_segment_t;
62
63struct thread_info {
64 struct task_struct *task; /* main task structure */
65 unsigned long flags; /* low level flags */
66 unsigned long status; /* thread-synchronous flags */
67 __u32 cpu; /* current CPU */
68 __s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/
69 mm_segment_t addr_limit; /* thread address space */
70
71 struct cpu_context cpu_context;
72};
73
74/*
75 * macros/functions for gaining access to the thread information structure
76 */
77#define INIT_THREAD_INFO(tsk) \
78{ \
79 .task = &tsk, \
80 .flags = 0, \
81 .cpu = 0, \
82 .preempt_count = INIT_PREEMPT_COUNT, \
83 .addr_limit = KERNEL_DS, \
84}
85
86/* how to get the thread information struct from C */
87static inline struct thread_info *current_thread_info(void)
88{
89 register unsigned long sp asm("r1");
90
91 return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
92}
93
94/* thread information allocation */
95#endif /* __ASSEMBLY__ */
96
97/*
98 * thread information flags
99 * - these are process state flags that various assembly files may
100 * need to access
101 * - pending work-to-be-done flags are in LSW
102 * - other flags in MSW
103 */
104#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
105#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
106#define TIF_SIGPENDING 2 /* signal pending */
107#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
108/* restore singlestep on return to user mode */
109#define TIF_SINGLESTEP 4
110#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
111#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
112#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
113#define TIF_SECCOMP 10 /* secure computing */
114
115/* true if poll_idle() is polling TIF_NEED_RESCHED */
116#define TIF_POLLING_NRFLAG 16
117
118#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
119#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
120#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
121#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
122#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
123#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
124#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
125#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
126#define _TIF_SECCOMP (1 << TIF_SECCOMP)
127
128/* work to do in syscall trace */
129#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
130 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
131
132/* work to do on interrupt/exception return */
133#define _TIF_WORK_MASK 0x0000FFFE
134
135/* work to do on any return to u-space */
136#define _TIF_ALLWORK_MASK 0x0000FFFF
137
138/*
139 * Thread-synchronous status.
140 *
141 * This is different from the flags in that nobody else
142 * ever touches our thread-synchronous status, so we don't
143 * have to worry about atomic accesses.
144 */
145/* FPU was used by this task this quantum (SMP) */
146#define TS_USEDFPU 0x0001
147
148#endif /* __KERNEL__ */
149#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */