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 struct exec_domain *exec_domain; /* execution domain */ 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 .exec_domain = &default_exec_domain, \ 41 .addr_limit = KERNEL_DS, \ 42 .preempt_count = INIT_PREEMPT_COUNT, \ 43 } 44 45 #define init_stack (init_thread_union.stack) 46 47 #ifndef __ASSEMBLY__ 48 /* how to get the thread information struct from C */ 49 static inline struct thread_info *current_thread_info(void) 50 { 51 struct thread_info *ti; 52 __asm__( 53 "move.l %%sp, %0 \n\t" 54 "and.l %1, %0" 55 : "=&d"(ti) 56 : "di" (~(THREAD_SIZE-1)) 57 ); 58 return ti; 59 } 60 #endif 61 62 #define init_thread_info (init_thread_union.thread_info) 63 64 /* entry.S relies on these definitions! 65 * bits 0-7 are tested at every exception exit 66 * bits 8-15 are also tested at syscall exit 67 */ 68 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 69 #define TIF_SIGPENDING 6 /* signal pending */ 70 #define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 71 #define TIF_DELAYED_TRACE 14 /* single step a syscall */ 72 #define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 73 #define TIF_MEMDIE 16 /* is terminating due to OOM killer */ 74 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ 75 76 #endif /* _ASM_M68K_THREAD_INFO_H */ 77