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102 lines
3.2 KiB
102 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* thread_info.h: h8300 low-level thread information |
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* adapted from the i386 and PPC versions by Yoshinori Sato <[email protected]> |
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* |
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* Copyright (C) 2002 David Howells ([email protected]) |
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller |
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*/ |
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#ifndef _ASM_THREAD_INFO_H |
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#define _ASM_THREAD_INFO_H |
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#include <asm/page.h> |
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#ifdef __KERNEL__ |
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/* |
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* Size of kernel stack for each process. This must be a power of 2... |
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*/ |
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#define THREAD_SIZE_ORDER 1 |
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#define THREAD_SIZE 8192 /* 2 pages */ |
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#ifndef __ASSEMBLY__ |
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/* |
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* low level task data. |
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* If you change this, change the TI_* offsets below to match. |
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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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int cpu; /* cpu we're on */ |
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int preempt_count; /* 0 => preemptable, <0 => BUG */ |
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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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.flags = 0, \ |
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.cpu = 0, \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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} |
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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__("mov.l sp, %0\n\t" |
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"and.w %1, %T0" |
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: "=&r"(ti) |
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: "i" (~(THREAD_SIZE-1) & 0xffff)); |
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return ti; |
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} |
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#endif /* __ASSEMBLY__ */ |
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/* |
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* thread information flag bit numbers |
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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_SINGLESTEP 3 /* singlestepping active */ |
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#define TIF_MEMDIE 4 /* is terminating due to OOM killer */ |
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#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ |
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#define TIF_NOTIFY_RESUME 6 /* callback before returning to user */ |
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#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ |
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#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ |
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#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
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#define TIF_NOTIFY_SIGNAL 10 /* signal notifications exist */ |
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/* as above, but as bit values */ |
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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_SINGLESTEP (1 << TIF_SINGLESTEP) |
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
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#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) |
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
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#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) |
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/* work to do in syscall trace */ |
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#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ |
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_TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT) |
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/* work to do on any return to u-space */ |
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#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ |
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_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ |
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_TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \ |
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_TIF_SYSCALL_TRACEPOINT | _TIF_NOTIFY_SIGNAL) |
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/* work to do on interrupt/exception return */ |
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#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ |
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_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_THREAD_INFO_H */
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