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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_M68K_THREAD_INFO_H
2#define _ASM_M68K_THREAD_INFO_H
3
4#include <asm/types.h>
5#include <asm/page.h>
6
7struct thread_info {
8 struct task_struct *task; /* main task structure */
9 unsigned long flags;
10 struct exec_domain *exec_domain; /* execution domain */
11 int preempt_count; /* 0 => preemptable, <0 => BUG */
12 __u32 cpu; /* should always be 0 on m68k */
13 struct restart_block restart_block;
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
36#define init_thread_info (init_task.thread.info)
37#define init_stack (init_thread_union.stack)
38
39#define task_thread_info(tsk) (&(tsk)->thread.info)
40#define task_stack_page(tsk) ((tsk)->stack)
41#define current_thread_info() task_thread_info(current)
42
43#define __HAVE_THREAD_FUNCTIONS
44
45#define setup_thread_stack(p, org) ({ \
46 *(struct task_struct **)(p)->stack = (p); \
47 task_thread_info(p)->task = (p); \
48})
49
50#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
51
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
55 */
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
61
62#endif /* _ASM_M68K_THREAD_INFO_H */