/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M68K_THREAD_INFO_H
#define _ASM_M68K_THREAD_INFO_H

#include <asm/types.h>
#include <asm/page.h>

/*
 * On machines with 4k pages we default to an 8k thread size, though we
 * allow a 4k with config option. Any other machine page size then
 * the thread size must match the page size (which is 8k and larger here).
 */
#if PAGE_SHIFT < 13
#ifdef CONFIG_4KSTACKS
#define THREAD_SIZE_ORDER       0
#else
#define THREAD_SIZE_ORDER       1
#endif
#else
#define THREAD_SIZE_ORDER       0
#endif

#define THREAD_SIZE     (PAGE_SIZE << THREAD_SIZE_ORDER)

#ifndef __ASSEMBLER__

struct thread_info {
        struct task_struct      *task;          /* main task structure */
        unsigned long           flags;
        int                     preempt_count;  /* 0 => preemptable, <0 => BUG */
        __u32                   cpu;            /* should always be 0 on m68k */
        unsigned long           tp_value;       /* thread pointer */
};
#endif /* __ASSEMBLER__ */

#define INIT_THREAD_INFO(tsk)                   \
{                                               \
        .task           = &tsk,                 \
        .preempt_count  = INIT_PREEMPT_COUNT,   \
}

#ifndef __ASSEMBLER__
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
        struct thread_info *ti;
        __asm__(
                "move.l %%sp, %0 \n\t"
                "and.l  %1, %0"
                : "=&d"(ti)
                : "di" (~(THREAD_SIZE-1))
                );
        return ti;
}
#endif

/* entry.S relies on these definitions!
 * bits 0-7 are tested at every exception exit
 * bits 8-15 are also tested at syscall exit
 */
#define TIF_NOTIFY_SIGNAL       4
#define TIF_NOTIFY_RESUME       5       /* callback before returning to user */
#define TIF_SIGPENDING          6       /* signal pending */
#define TIF_NEED_RESCHED        7       /* rescheduling necessary */
#define TIF_SECCOMP             13      /* seccomp syscall filtering active */
#define TIF_DELAYED_TRACE       14      /* single step a syscall */
#define TIF_SYSCALL_TRACE       15      /* syscall trace active */
#define TIF_MEMDIE              16      /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK     18      /* restore signal mask in do_signal */

#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
#define _TIF_SECCOMP            (1 << TIF_SECCOMP)
#define _TIF_DELAYED_TRACE      (1 << TIF_DELAYED_TRACE)
#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
#define _TIF_MEMDIE             (1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)

#endif  /* _ASM_M68K_THREAD_INFO_H */