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 27 struct 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 */ 46 static 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_SIGNAL 4 64 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 65 #define TIF_SIGPENDING 6 /* signal pending */ 66 #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 67 #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 68 #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 69 #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 70 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 71 72 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 73 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 74 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 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