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>
14 struct task_struct
*task
; /* main task structure */
15 struct exec_domain
*exec_domain
; /* execution domain */
16 unsigned long flags
; /* low level flags */
17 __u32 cpu
; /* current CPU */
18 __s32 preempt_count
; /* 0 => preemptable,
20 mm_segment_t addr_limit
; /* thread address space:
22 0-0xFFFFFFFF for kernel */
23 struct restart_block restart_block
;
26 #define INIT_THREAD_INFO(tsk) \
29 exec_domain: &default_exec_domain, \
33 addr_limit: KERNEL_DS, \
35 fn: do_no_restart_syscall, \
39 #define init_thread_info (init_thread_union.thread_info)
40 #define init_stack (init_thread_union.stack)
42 /* how to get the thread information struct from C */
43 static inline struct thread_info
*current_thread_info(void)
45 struct thread_info
*ti
;
46 __asm__("andl %%esp,%0; ":"=r" (ti
) : "0" (~16383UL));
50 /* thread information allocation */
51 #define THREAD_SIZE (4*PAGE_SIZE)
52 #define alloc_thread_info(tsk) ((struct thread_info *) \
53 __get_free_pages(GFP_KERNEL,2))
54 #define free_thread_info(ti) free_pages((unsigned long) (ti), 2)
55 #define get_thread_info(ti) get_task_struct((ti)->task)
56 #define put_thread_info(ti) put_task_struct((ti)->task)
60 #define PREEMPT_ACTIVE 0x4000000
62 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
63 #define TIF_SIGPENDING 1 /* signal pending */
64 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
65 #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
69 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
70 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
71 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
72 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
77 * Overrides for Emacs so that we follow Linus's tabbing style.
78 * Emacs will notice this stuff at the end of the file and automatically
79 * adjust the settings for this buffer only. This must remain at the end
81 * ---------------------------------------------------------------------------
83 * c-file-style: "linux"