88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
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#ifndef __ASM_SH64_THREAD_INFO_H
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#define __ASM_SH64_THREAD_INFO_H
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/*
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* SuperH 5 version
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* Copyright (C) 2003 Paul Mundt
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*/
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#include <asm/registers.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 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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struct exec_domain *exec_domain; /* execution domain */
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unsigned long flags; /* low level flags */
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/* Put the 4 32-bit fields together to make asm offsetting easier. */
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__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
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__u16 cpu;
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mm_segment_t addr_limit;
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struct restart_block restart_block;
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__u8 supervisor_stack[0];
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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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#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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__asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti));
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return ti;
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}
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/* thread information allocation */
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#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
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#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
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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 /* __ASSEMBLY__ */
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#define THREAD_SIZE 8192
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#define PREEMPT_ACTIVE 0x4000000
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/* thread information flags */
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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#define TIF_MEMDIE 4
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#endif /* __KERNEL__ */
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#endif /* __ASM_SH64_THREAD_INFO_H */
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