Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_M68K_THREAD_INFO_H
3#define _ASM_M68K_THREAD_INFO_H
4
5#include <asm/types.h>
6#include <asm/page.h>
7
8/*
9 * On machines with 4k pages we default to an 8k thread size, though we
10 * allow a 4k with config option. Any other machine page size then
11 * the thread size must match the page size (which is 8k and larger here).
12 */
13#if PAGE_SHIFT < 13
14#ifdef CONFIG_4KSTACKS
15#define THREAD_SIZE 4096
16#else
17#define THREAD_SIZE 8192
18#endif
19#else
20#define THREAD_SIZE PAGE_SIZE
21#endif
22#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1)
23
24#ifndef __ASSEMBLY__
25
26struct thread_info {
27 struct task_struct *task; /* main task structure */
28 unsigned long flags;
29 int preempt_count; /* 0 => preemptable, <0 => BUG */
30 __u32 cpu; /* should always be 0 on m68k */
31 unsigned long tp_value; /* thread pointer */
32};
33#endif /* __ASSEMBLY__ */
34
35#define INIT_THREAD_INFO(tsk) \
36{ \
37 .task = &tsk, \
38 .preempt_count = INIT_PREEMPT_COUNT, \
39}
40
41#ifndef __ASSEMBLY__
42/* how to get the thread information struct from C */
43static inline struct thread_info *current_thread_info(void)
44{
45 struct thread_info *ti;
46 __asm__(
47 "move.l %%sp, %0 \n\t"
48 "and.l %1, %0"
49 : "=&d"(ti)
50 : "di" (~(THREAD_SIZE-1))
51 );
52 return ti;
53}
54#endif
55
56/* entry.S relies on these definitions!
57 * bits 0-7 are tested at every exception exit
58 * bits 8-15 are also tested at syscall exit
59 */
60#define TIF_NOTIFY_SIGNAL 4
61#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
62#define TIF_SIGPENDING 6 /* signal pending */
63#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
64#define TIF_SECCOMP 13 /* seccomp syscall filtering active */
65#define TIF_DELAYED_TRACE 14 /* single step a syscall */
66#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
67#define TIF_MEMDIE 16 /* is terminating due to OOM killer */
68#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */
69
70#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
71#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
72#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
73#define _TIF_SECCOMP (1 << TIF_SECCOMP)
74#define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE)
75#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
76#define _TIF_MEMDIE (1 << TIF_MEMDIE)
77#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
78
79#endif /* _ASM_M68K_THREAD_INFO_H */