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 8 /* 9 * On machines with 4k pages we default to an 8k thread size, though we 10 * allow a 4k with config option. Any other machine page size then 11 * the thread size must match the page size (which is 8k and larger here). 12 */ 13 #if PAGE_SHIFT < 13 14 #ifdef CONFIG_4KSTACKS 15 #define THREAD_SIZE 4096 16 #else 17 #define THREAD_SIZE 8192 18 #endif 19 #else 20 #define THREAD_SIZE PAGE_SIZE 21 #endif 22 #define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) 23 24 #ifndef __ASSEMBLY__ 25 26 struct thread_info { 27 struct task_struct *task; /* main task structure */ 28 unsigned long flags; 29 int preempt_count; /* 0 => preemptable, <0 => BUG */ 30 __u32 cpu; /* should always be 0 on m68k */ 31 unsigned long tp_value; /* thread pointer */ 32 }; 33 #endif /* __ASSEMBLY__ */ 34 35 #define INIT_THREAD_INFO(tsk) \ 36 { \ 37 .task = &tsk, \ 38 .preempt_count = INIT_PREEMPT_COUNT, \ 39 } 40 41 #ifndef __ASSEMBLY__ 42 /* how to get the thread information struct from C */ current_thread_info(void)43static inline struct thread_info *current_thread_info(void) 44 { 45 struct thread_info *ti; 46 __asm__( 47 "move.l %%sp, %0 \n\t" 48 "and.l %1, %0" 49 : "=&d"(ti) 50 : "di" (~(THREAD_SIZE-1)) 51 ); 52 return ti; 53 } 54 #endif 55 56 /* entry.S relies on these definitions! 57 * bits 0-7 are tested at every exception exit 58 * bits 8-15 are also tested at syscall exit 59 */ 60 #define TIF_NOTIFY_SIGNAL 4 61 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 62 #define TIF_SIGPENDING 6 /* signal pending */ 63 #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 64 #define TIF_SECCOMP 13 /* seccomp syscall filtering active */ 65 #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 66 #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 67 #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 68 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 69 70 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 71 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 72 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 73 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 74 #define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) 75 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 76 #define _TIF_MEMDIE (1 << TIF_MEMDIE) 77 #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) 78 79 #endif /* _ASM_M68K_THREAD_INFO_H */ 80