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93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
#ifndef _ASM_SCORE_THREAD_INFO_H
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#define _ASM_SCORE_THREAD_INFO_H
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#ifdef __KERNEL__
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#define KU_MASK 0x08
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#define KU_USER 0x08
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#define KU_KERN 0x00
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#include <asm/page.h>
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#include <linux/const.h>
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/* thread information allocation */
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#define THREAD_SIZE_ORDER (1)
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#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
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#define THREAD_MASK (THREAD_SIZE - _AC(1,UL))
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#ifndef __ASSEMBLY__
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#include <asm/processor.h>
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/*
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* low level task data that entry.S needs immediate access to
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* - this struct should fit entirely inside of one cache line
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* - this struct shares the supervisor stack pages
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* - if the contents of this structure are changed, the assembly constants
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* must also be changed
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*/
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* low level flags */
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unsigned long tp_value; /* thread pointer */
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__u32 cpu; /* current CPU */
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/* 0 => preemptable, < 0 => BUG */
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int preempt_count;
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/*
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* thread address space:
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* 0-0xBFFFFFFF for user-thead
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* 0-0xFFFFFFFF for kernel-thread
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*/
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mm_segment_t addr_limit;
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struct pt_regs *regs;
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};
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/*
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* macros/functions for gaining access to the thread information structure
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*
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* preempt_count needs to be 1 initially, until the scheduler is functional.
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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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.cpu = 0, \
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.preempt_count = 1, \
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.addr_limit = KERNEL_DS, \
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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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register struct thread_info *__current_thread_info __asm__("r28");
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#define current_thread_info() __current_thread_info
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#endif /* !__ASSEMBLY__ */
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/*
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* thread information flags
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* - these are process state flags that various assembly files may need to
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* access
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* - pending work-to-be-done flags are in LSW
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* - other flags in MSW
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*/
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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_NOTIFY_RESUME 5 /* callback before returning to user */
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#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
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#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
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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_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
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#define _TIF_WORK_MASK (0x0000ffff)
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#endif /* __KERNEL__ */
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#endif /* _ASM_SCORE_THREAD_INFO_H */
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