1 #ifndef _ASM_M68K_THREAD_INFO_H 2 #define _ASM_M68K_THREAD_INFO_H 3 4 #include <asm/types.h> 5 #include <asm/page.h> 6 #include <asm/segment.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 mm_segment_t addr_limit; /* thread address space */ 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 .addr_limit = KERNEL_DS, \ 40 .preempt_count = INIT_PREEMPT_COUNT, \ 41 } 42 43 #define init_stack (init_thread_union.stack) 44 45 #ifndef __ASSEMBLY__ 46 /* how to get the thread information struct from C */ 47 static inline struct thread_info *current_thread_info(void) 48 { 49 struct thread_info *ti; 50 __asm__( 51 "move.l %%sp, %0 \n\t" 52 "and.l %1, %0" 53 : "=&d"(ti) 54 : "di" (~(THREAD_SIZE-1)) 55 ); 56 return ti; 57 } 58 #endif 59 60 #define init_thread_info (init_thread_union.thread_info) 61 62 /* entry.S relies on these definitions! 63 * bits 0-7 are tested at every exception exit 64 * bits 8-15 are also tested at syscall exit 65 */ 66 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 67 #define TIF_SIGPENDING 6 /* signal pending */ 68 #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 69 #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 70 #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 71 #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 72 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 73 74 #endif /* _ASM_M68K_THREAD_INFO_H */ 75