/* SPDX-License-Identifier: GPL-2.0 */
|
/* thread_info.h: h8300 low-level thread information
|
* adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp>
|
*
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
*/
|
|
#ifndef _ASM_THREAD_INFO_H
|
#define _ASM_THREAD_INFO_H
|
|
#include <asm/page.h>
|
#include <asm/segment.h>
|
|
#ifdef __KERNEL__
|
|
/*
|
* Size of kernel stack for each process. This must be a power of 2...
|
*/
|
#define THREAD_SIZE_ORDER 1
|
#define THREAD_SIZE 8192 /* 2 pages */
|
|
#ifndef __ASSEMBLY__
|
|
/*
|
* low level task data.
|
* If you change this, change the TI_* offsets below to match.
|
*/
|
struct thread_info {
|
struct task_struct *task; /* main task structure */
|
unsigned long flags; /* low level flags */
|
int cpu; /* cpu we're on */
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
mm_segment_t addr_limit;
|
};
|
|
/*
|
* macros/functions for gaining access to the thread information structure
|
*/
|
#define INIT_THREAD_INFO(tsk) \
|
{ \
|
.task = &tsk, \
|
.flags = 0, \
|
.cpu = 0, \
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
.addr_limit = KERNEL_DS, \
|
}
|
|
/* how to get the thread information struct from C */
|
static inline struct thread_info *current_thread_info(void)
|
{
|
struct thread_info *ti;
|
|
__asm__("mov.l sp, %0\n\t"
|
"and.w %1, %T0"
|
: "=&r"(ti)
|
: "i" (~(THREAD_SIZE-1) & 0xffff));
|
return ti;
|
}
|
|
#endif /* __ASSEMBLY__ */
|
|
/*
|
* thread information flag bit numbers
|
*/
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
#define TIF_SIGPENDING 1 /* signal pending */
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
#define TIF_SINGLESTEP 3 /* singlestepping active */
|
#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
|
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
|
#define TIF_NOTIFY_RESUME 6 /* callback before returning to user */
|
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
|
#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
|
#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */
|
#define TIF_NOTIFY_SIGNAL 10 /* signal notifications exist */
|
|
/* as above, but as bit values */
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
|
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
|
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
|
|
/* work to do in syscall trace */
|
#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
|
_TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT)
|
|
/* work to do on any return to u-space */
|
#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
|
_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
|
_TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \
|
_TIF_SYSCALL_TRACEPOINT | _TIF_NOTIFY_SIGNAL)
|
|
/* work to do on interrupt/exception return */
|
#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
|
_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_THREAD_INFO_H */
|
