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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d2a5f499 YS |
2 | /* thread_info.h: h8300 low-level thread information |
3 | * adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp> | |
4 | * | |
5 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
6 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
7 | */ | |
8 | ||
9 | #ifndef _ASM_THREAD_INFO_H | |
10 | #define _ASM_THREAD_INFO_H | |
11 | ||
12 | #include <asm/page.h> | |
13 | #include <asm/segment.h> | |
14 | ||
15 | #ifdef __KERNEL__ | |
16 | ||
75078de4 YS |
17 | /* |
18 | * Size of kernel stack for each process. This must be a power of 2... | |
19 | */ | |
20 | #define THREAD_SIZE_ORDER 1 | |
21 | #define THREAD_SIZE 8192 /* 2 pages */ | |
22 | ||
d2a5f499 YS |
23 | #ifndef __ASSEMBLY__ |
24 | ||
25 | /* | |
26 | * low level task data. | |
27 | * If you change this, change the TI_* offsets below to match. | |
28 | */ | |
29 | struct thread_info { | |
30 | struct task_struct *task; /* main task structure */ | |
31 | unsigned long flags; /* low level flags */ | |
32 | int cpu; /* cpu we're on */ | |
33 | int preempt_count; /* 0 => preemptable, <0 => BUG */ | |
34 | mm_segment_t addr_limit; | |
d2a5f499 YS |
35 | }; |
36 | ||
37 | /* | |
38 | * macros/functions for gaining access to the thread information structure | |
39 | */ | |
40 | #define INIT_THREAD_INFO(tsk) \ | |
41 | { \ | |
42 | .task = &tsk, \ | |
43 | .flags = 0, \ | |
44 | .cpu = 0, \ | |
45 | .preempt_count = INIT_PREEMPT_COUNT, \ | |
46 | .addr_limit = KERNEL_DS, \ | |
d2a5f499 YS |
47 | } |
48 | ||
d2a5f499 YS |
49 | /* how to get the thread information struct from C */ |
50 | static inline struct thread_info *current_thread_info(void) | |
51 | { | |
52 | struct thread_info *ti; | |
53 | ||
54 | __asm__("mov.l sp, %0\n\t" | |
55 | "and.w %1, %T0" | |
56 | : "=&r"(ti) | |
57 | : "i" (~(THREAD_SIZE-1) & 0xffff)); | |
58 | return ti; | |
59 | } | |
60 | ||
61 | #endif /* __ASSEMBLY__ */ | |
62 | ||
63 | /* | |
64 | * thread information flag bit numbers | |
65 | */ | |
66 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
67 | #define TIF_SIGPENDING 1 /* signal pending */ | |
68 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
69 | #define TIF_SINGLESTEP 3 /* singlestepping active */ | |
70 | #define TIF_MEMDIE 4 /* is terminating due to OOM killer */ | |
71 | #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ | |
72 | #define TIF_NOTIFY_RESUME 6 /* callback before returning to user */ | |
73 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ | |
74 | #define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ | |
75 | #define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
76 | ||
77 | /* as above, but as bit values */ | |
78 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
79 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
80 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
81 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) | |
82 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) | |
83 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
84 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) | |
85 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
86 | ||
87 | /* work to do in syscall trace */ | |
88 | #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ | |
89 | _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT) | |
90 | ||
91 | /* work to do on any return to u-space */ | |
92 | #define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ | |
93 | _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ | |
94 | _TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \ | |
95 | _TIF_SYSCALL_TRACEPOINT) | |
96 | ||
97 | /* work to do on interrupt/exception return */ | |
98 | #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ | |
99 | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) | |
100 | ||
101 | #endif /* __KERNEL__ */ | |
102 | ||
103 | #endif /* _ASM_THREAD_INFO_H */ |