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#include <asm/segment.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	mm_segment_t		addr_limit;	/* thread address space */
30	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
31	__u32			cpu;		/* should always be 0 on m68k */
32	unsigned long		tp_value;	/* thread pointer */
33};
34#endif /* __ASSEMBLY__ */
35
36#define INIT_THREAD_INFO(tsk)			\
37{						\
38	.task		= &tsk,			\
39	.addr_limit	= KERNEL_DS,		\
40	.preempt_count	= INIT_PREEMPT_COUNT,	\
41}
42
43#define init_stack		(init_thread_union.stack)
44
45#ifndef __ASSEMBLY__
46/* how to get the thread information struct from C */
47static inline struct thread_info *current_thread_info(void)
48{
49	struct thread_info *ti;
50	__asm__(
51		"move.l %%sp, %0 \n\t"
52		"and.l  %1, %0"
53		: "=&d"(ti)
54		: "di" (~(THREAD_SIZE-1))
55		);
56	return ti;
57}
58#endif
59
60#define init_thread_info	(init_thread_union.thread_info)
61
62/* entry.S relies on these definitions!
63 * bits 0-7 are tested at every exception exit
64 * bits 8-15 are also tested at syscall exit
65 */
66#define TIF_NOTIFY_RESUME	5	/* callback before returning to user */
67#define TIF_SIGPENDING		6	/* signal pending */
68#define TIF_NEED_RESCHED	7	/* rescheduling necessary */
69#define TIF_DELAYED_TRACE	14	/* single step a syscall */
70#define TIF_SYSCALL_TRACE	15	/* syscall trace active */
71#define TIF_MEMDIE		16	/* is terminating due to OOM killer */
72#define TIF_RESTORE_SIGMASK	18	/* restore signal mask in do_signal */
73
74#endif	/* _ASM_M68K_THREAD_INFO_H */
75