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94 lines
2.6 KiB
94 lines
2.6 KiB
20 years ago
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/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_THREAD_INFO_H
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#define __UM_THREAD_INFO_H
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#ifndef __ASSEMBLY__
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#include <linux/config.h>
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#include <asm/processor.h>
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#include <asm/types.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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unsigned long flags; /* low level flags */
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__u32 cpu; /* current CPU */
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__s32 preempt_count; /* 0 => preemptable,
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<0 => BUG */
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mm_segment_t addr_limit; /* thread address space:
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0-0xBFFFFFFF for user
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0-0xFFFFFFFF for kernel */
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struct restart_block restart_block;
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};
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#define INIT_THREAD_INFO(tsk) \
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{ \
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task: &tsk, \
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exec_domain: &default_exec_domain, \
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flags: 0, \
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cpu: 0, \
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preempt_count: 1, \
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addr_limit: KERNEL_DS, \
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restart_block: { \
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fn: do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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unsigned long mask = PAGE_SIZE *
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(1 << CONFIG_KERNEL_STACK_ORDER) - 1;
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ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
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return ti;
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}
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/* thread information allocation */
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#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
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#define alloc_thread_info(tsk) \
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((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL))
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#define free_thread_info(ti) kfree(ti)
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#define get_thread_info(ti) get_task_struct((ti)->task)
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#define put_thread_info(ti) put_task_struct((ti)->task)
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#endif
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#define PREEMPT_ACTIVE 0x4000000
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
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* TIF_NEED_RESCHED
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*/
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#define TIF_RESTART_BLOCK 4
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#define TIF_MEMDIE 5
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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#define _TIF_RESTART_BLOCK (1 << TIF_RESTART_BLOCK)
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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