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_ORDER 0 16 #else 17 #define THREAD_SIZE_ORDER 1 18 #endif 19 #else 20 #define THREAD_SIZE_ORDER 0 21 #endif 22 23 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 24 25 #ifndef __ASSEMBLY__ 26 27 struct thread_info { 28 struct task_struct *task; /* main task structure */ 29 unsigned long flags; 30 int preempt_count; /* 0 => preemptable, <0 => BUG */ 31 __u32 cpu; /* should always be 0 on m68k */ 32 unsigned long tp_value; /* thread pointer */ 33 }; 34 #endif /* __ASSEMBLY__ */ 35 36 #define INIT_THREAD_INFO(tsk) \ 37 { \ 38 .task = &tsk, \ 39 .preempt_count = INIT_PREEMPT_COUNT, \ 40 } 41 42 #ifndef __ASSEMBLY__ 43 /* how to get the thread information struct from C */ 44 static inline struct thread_info *current_thread_info(void) 45 { 46 struct thread_info *ti; 47 __asm__( 48 "move.l %%sp, %0 \n\t" 49 "and.l %1, %0" 50 : "=&d"(ti) 51 : "di" (~(THREAD_SIZE-1)) 52 ); 53 return ti; 54 } 55 #endif 56 57 /* entry.S relies on these definitions! 58 * bits 0-7 are tested at every exception exit 59 * bits 8-15 are also tested at syscall exit 60 */ 61 #define TIF_NOTIFY_SIGNAL 4 62 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 63 #define TIF_SIGPENDING 6 /* signal pending */ 64 #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 65 #define TIF_SECCOMP 13 /* seccomp syscall filtering active */ 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 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 72 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 73 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 74 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 75 #define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) 76 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 77 #define _TIF_MEMDIE (1 << TIF_MEMDIE) 78 #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) 79 80 #endif /* _ASM_M68K_THREAD_INFO_H */ 81