76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
|
/* 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>
|
||
|
|
#include <asm/segment.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 4096
|
||
|
|
#else
|
||
|
|
#define THREAD_SIZE 8192
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#define THREAD_SIZE PAGE_SIZE
|
||
|
|
#endif
|
||
|
|
#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1)
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
struct thread_info {
|
||
|
|
struct task_struct *task; /* main task structure */
|
||
|
|
unsigned long flags;
|
||
|
|
mm_segment_t addr_limit; /* thread address space */
|
||
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
||
|
|
__u32 cpu; /* should always be 0 on m68k */
|
||
|
|
unsigned long tp_value; /* thread pointer */
|
||
|
|
};
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#define INIT_THREAD_INFO(tsk) \
|
||
|
|
{ \
|
||
|
|
.task = &tsk, \
|
||
|
|
.addr_limit = KERNEL_DS, \
|
||
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define init_stack (init_thread_union.stack)
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
/* 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
|
||
|
|
|
||
|
|
#define init_thread_info (init_thread_union.thread_info)
|
||
|
|
|
||
|
|
/* 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_RESUME 5 /* callback before returning to user */
|
||
|
|
#define TIF_SIGPENDING 6 /* signal pending */
|
||
|
|
#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
|
||
|
|
#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 */
|
||
|
|
|
||
|
|
#endif /* _ASM_M68K_THREAD_INFO_H */
|