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 __s32 preempt_count
; /* 0 => preemptable,
21 mm_segment_t addr_limit
; /* thread address space:
23 0-0xFFFFFFFF for kernel */
24 struct restart_block restart_block
;
27 #define INIT_THREAD_INFO(tsk) \
30 exec_domain: &default_exec_domain, \
34 addr_limit: KERNEL_DS, \
36 fn: do_no_restart_syscall, \
40 #define init_thread_info (init_thread_union.thread_info)
41 #define init_stack (init_thread_union.stack)
43 /* how to get the thread information struct from C */
44 static inline struct thread_info
*current_thread_info(void)
46 struct thread_info
*ti
;
47 unsigned long mask
= PAGE_SIZE
*
48 (1 << CONFIG_KERNEL_STACK_ORDER
) - 1;
49 __asm__("andl %%esp,%0; ":"=r" (ti
) : "0" (~mask
));
53 /* thread information allocation */
54 #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
55 #define alloc_thread_info(tsk) \
56 ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL))
57 #define free_thread_info(ti) kfree(ti)
59 #define get_thread_info(ti) get_task_struct((ti)->task)
60 #define put_thread_info(ti) put_task_struct((ti)->task)
64 #define PREEMPT_ACTIVE 0x4000000
66 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
67 #define TIF_SIGPENDING 1 /* signal pending */
68 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
69 #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
72 #define TIF_RESTART_BLOCK 4
74 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
75 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
76 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
77 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
78 #define _TIF_RESTART_BLOCK (1 << TIF_RESTART_BLOCK)
83 * Overrides for Emacs so that we follow Linus's tabbing style.
84 * Emacs will notice this stuff at the end of the file and automatically
85 * adjust the settings for this buffer only. This must remain at the end
87 * ---------------------------------------------------------------------------
89 * c-file-style: "linux"