2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #ifndef __UM_THREAD_INFO_H
7 #define __UM_THREAD_INFO_H
11 #include <asm/processor.h>
12 #include <asm/types.h>
15 struct task_struct *task; /* main task structure */
16 struct exec_domain *exec_domain; /* execution domain */
17 unsigned long flags; /* low level flags */
18 __u32 cpu; /* current CPU */
19 int preempt_count; /* 0 => preemptable,
21 mm_segment_t addr_limit; /* thread address space:
23 0-0xFFFFFFFF for kernel */
24 struct restart_block restart_block;
25 struct thread_info *real_thread; /* Points to non-IRQ stack */
28 #define INIT_THREAD_INFO(tsk) \
31 .exec_domain = &default_exec_domain, \
35 .addr_limit = KERNEL_DS, \
37 .fn = do_no_restart_syscall, \
39 .real_thread = NULL, \
42 #define init_thread_info (init_thread_union.thread_info)
43 #define init_stack (init_thread_union.stack)
45 #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
46 /* how to get the thread information struct from C */
47 static inline struct thread_info *current_thread_info(void)
49 struct thread_info *ti;
50 unsigned long mask = THREAD_SIZE - 1;
51 ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
55 #ifdef CONFIG_DEBUG_STACK_USAGE
57 #define alloc_thread_info(tsk) \
58 ((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \
59 CONFIG_KERNEL_STACK_ORDER))
62 /* thread information allocation */
63 #define alloc_thread_info(tsk) \
64 ((struct thread_info *) __get_free_pages(GFP_KERNEL, \
65 CONFIG_KERNEL_STACK_ORDER))
68 #define free_thread_info(ti) \
69 free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)
73 #define PREEMPT_ACTIVE 0x10000000
75 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
76 #define TIF_SIGPENDING 1 /* signal pending */
77 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
78 #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
81 #define TIF_RESTART_BLOCK 4
83 #define TIF_SYSCALL_AUDIT 6
84 #define TIF_RESTORE_SIGMASK 7
86 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
87 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
88 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
89 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
90 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
91 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
92 #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)