1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_M68K_THREAD_INFO_H 3#define _ASM_M68K_THREAD_INFO_H 4 5#include <asm/types.h> 6#include <asm/page.h> 7#include <asm/segment.h> 8 9/* 10 * On machines with 4k pages we default to an 8k thread size, though we 11 * allow a 4k with config option. Any other machine page size then 12 * the thread size must match the page size (which is 8k and larger here). 13 */ 14#if PAGE_SHIFT < 13 15#ifdef CONFIG_4KSTACKS 16#define THREAD_SIZE 4096 17#else 18#define THREAD_SIZE 8192 19#endif 20#else 21#define THREAD_SIZE PAGE_SIZE 22#endif 23#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) 24 25#ifndef __ASSEMBLY__ 26 27struct thread_info { 28 struct task_struct *task; /* main task structure */ 29 unsigned long flags; 30 mm_segment_t addr_limit; /* thread address space */ 31 int preempt_count; /* 0 => preemptable, <0 => BUG */ 32 __u32 cpu; /* should always be 0 on m68k */ 33 unsigned long tp_value; /* thread pointer */ 34}; 35#endif /* __ASSEMBLY__ */ 36 37#define INIT_THREAD_INFO(tsk) \ 38{ \ 39 .task = &tsk, \ 40 .addr_limit = KERNEL_DS, \ 41 .preempt_count = INIT_PREEMPT_COUNT, \ 42} 43 44#ifndef __ASSEMBLY__ 45/* how to get the thread information struct from C */ 46static inline struct thread_info *current_thread_info(void) 47{ 48 struct thread_info *ti; 49 __asm__( 50 "move.l %%sp, %0 \n\t" 51 "and.l %1, %0" 52 : "=&d"(ti) 53 : "di" (~(THREAD_SIZE-1)) 54 ); 55 return ti; 56} 57#endif 58 59/* entry.S relies on these definitions! 60 * bits 0-7 are tested at every exception exit 61 * bits 8-15 are also tested at syscall exit 62 */ 63#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 64#define TIF_SIGPENDING 6 /* signal pending */ 65#define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 66#define TIF_DELAYED_TRACE 14 /* single step a syscall */ 67#define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 68#define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 69#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 70 71#endif /* _ASM_M68K_THREAD_INFO_H */ 72