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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
cddafa35 GU |
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> | |
feb1ee75 | 7 | #include <asm/segment.h> |
cddafa35 GU |
8 | |
9 | /* | |
10 | * On machines with 4k pages we default to an 8k thread size, though we | |
11 | * allow a 4k with config option. Any other machine page size then | |
12 | * the thread size must match the page size (which is 8k and larger here). | |
13 | */ | |
14 | #if PAGE_SHIFT < 13 | |
15 | #ifdef CONFIG_4KSTACKS | |
16 | #define THREAD_SIZE 4096 | |
49148020 | 17 | #else |
cddafa35 | 18 | #define THREAD_SIZE 8192 |
49148020 | 19 | #endif |
cddafa35 GU |
20 | #else |
21 | #define THREAD_SIZE PAGE_SIZE | |
22 | #endif | |
23 | #define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) | |
24 | ||
25 | #ifndef __ASSEMBLY__ | |
26 | ||
27 | struct thread_info { | |
28 | struct task_struct *task; /* main task structure */ | |
29 | unsigned long flags; | |
feb1ee75 | 30 | mm_segment_t addr_limit; /* thread address space */ |
cddafa35 GU |
31 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
32 | __u32 cpu; /* should always be 0 on m68k */ | |
33 | unsigned long tp_value; /* thread pointer */ | |
cddafa35 GU |
34 | }; |
35 | #endif /* __ASSEMBLY__ */ | |
36 | ||
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37 | #define INIT_THREAD_INFO(tsk) \ |
38 | { \ | |
39 | .task = &tsk, \ | |
feb1ee75 | 40 | .addr_limit = KERNEL_DS, \ |
cddafa35 | 41 | .preempt_count = INIT_PREEMPT_COUNT, \ |
cddafa35 GU |
42 | } |
43 | ||
44 | #define init_stack (init_thread_union.stack) | |
45 | ||
cddafa35 GU |
46 | #ifndef __ASSEMBLY__ |
47 | /* how to get the thread information struct from C */ | |
48 | static inline struct thread_info *current_thread_info(void) | |
49 | { | |
50 | struct thread_info *ti; | |
51 | __asm__( | |
52 | "move.l %%sp, %0 \n\t" | |
53 | "and.l %1, %0" | |
54 | : "=&d"(ti) | |
55 | : "di" (~(THREAD_SIZE-1)) | |
56 | ); | |
57 | return ti; | |
58 | } | |
59 | #endif | |
60 | ||
61 | #define init_thread_info (init_thread_union.thread_info) | |
62 | ||
cddafa35 GU |
63 | /* entry.S relies on these definitions! |
64 | * bits 0-7 are tested at every exception exit | |
65 | * bits 8-15 are also tested at syscall exit | |
66 | */ | |
a54f1655 | 67 | #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ |
cddafa35 GU |
68 | #define TIF_SIGPENDING 6 /* signal pending */ |
69 | #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ | |
70 | #define TIF_DELAYED_TRACE 14 /* single step a syscall */ | |
71 | #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ | |
72 | #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ | |
e68847fe | 73 | #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ |
cddafa35 GU |
74 | |
75 | #endif /* _ASM_M68K_THREAD_INFO_H */ |