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1da177e4 LT |
1 | #ifndef _ASM_M68K_THREAD_INFO_H |
2 | #define _ASM_M68K_THREAD_INFO_H | |
3 | ||
4 | #include <asm/types.h> | |
1da177e4 LT |
5 | #include <asm/page.h> |
6 | ||
7 | struct thread_info { | |
8 | struct task_struct *task; /* main task structure */ | |
3b66a1ed | 9 | unsigned long flags; |
1da177e4 | 10 | struct exec_domain *exec_domain; /* execution domain */ |
dcd497f9 | 11 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
1da177e4 LT |
12 | __u32 cpu; /* should always be 0 on m68k */ |
13 | struct restart_block restart_block; | |
1da177e4 LT |
14 | }; |
15 | ||
16 | #define PREEMPT_ACTIVE 0x4000000 | |
17 | ||
18 | #define INIT_THREAD_INFO(tsk) \ | |
19 | { \ | |
20 | .task = &tsk, \ | |
21 | .exec_domain = &default_exec_domain, \ | |
22 | .restart_block = { \ | |
23 | .fn = do_no_restart_syscall, \ | |
24 | }, \ | |
25 | } | |
26 | ||
27 | /* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */ | |
28 | #if PAGE_SHIFT == 13 /* 8k machines */ | |
29 | #define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0)) | |
30 | #define free_thread_info(ti) free_pages((unsigned long)(ti),0) | |
31 | #else /* otherwise assume 4k pages */ | |
32 | #define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1)) | |
33 | #define free_thread_info(ti) free_pages((unsigned long)(ti),1) | |
34 | #endif /* PAGE_SHIFT == 13 */ | |
35 | ||
abd03753 | 36 | #define init_thread_info (init_task.thread.info) |
1da177e4 LT |
37 | #define init_stack (init_thread_union.stack) |
38 | ||
abd03753 | 39 | #define task_thread_info(tsk) (&(tsk)->thread.info) |
9fc65876 | 40 | #define task_stack_page(tsk) ((void *)(tsk)->thread_info) |
abd03753 | 41 | #define current_thread_info() task_thread_info(current) |
1da177e4 LT |
42 | |
43 | #define __HAVE_THREAD_FUNCTIONS | |
44 | ||
abd03753 AV |
45 | #define setup_thread_stack(p, org) ({ \ |
46 | *(struct task_struct **)(p)->thread_info = (p); \ | |
47 | task_thread_info(p)->task = (p); \ | |
48 | }) | |
49 | ||
50 | #define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1) | |
51 | ||
3b66a1ed RZ |
52 | /* entry.S relies on these definitions! |
53 | * bits 0-7 are tested at every exception exit | |
54 | * bits 8-15 are also tested at syscall exit | |
1da177e4 | 55 | */ |
3b66a1ed RZ |
56 | #define TIF_SIGPENDING 6 /* signal pending */ |
57 | #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ | |
58 | #define TIF_DELAYED_TRACE 14 /* single step a syscall */ | |
59 | #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ | |
60 | #define TIF_MEMDIE 16 | |
1da177e4 LT |
61 | |
62 | #endif /* _ASM_M68K_THREAD_INFO_H */ |