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 7struct thread_info { 8 struct task_struct *task; /* main task structure */ 9 unsigned long flags; 10 struct exec_domain *exec_domain; /* execution domain */ 11 int preempt_count; /* 0 => preemptable, <0 => BUG */ 12 __u32 cpu; /* should always be 0 on m68k */ 13 struct restart_block restart_block; 14}; 15 16#define PREEMPT_ACTIVE 0x4000000 17 18#define INIT_THREAD_INFO(tsk) \ 19{ \ 20 .task = &tsk, \ 21 .exec_domain = &default_exec_domain, \ 22 .restart_block = { \ 23 .fn = do_no_restart_syscall, \ 24 }, \ 25} 26 27/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */ 28#if PAGE_SHIFT == 13 /* 8k machines */ 29#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0)) 30#define free_thread_info(ti) free_pages((unsigned long)(ti),0) 31#else /* otherwise assume 4k pages */ 32#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1)) 33#define free_thread_info(ti) free_pages((unsigned long)(ti),1) 34#endif /* PAGE_SHIFT == 13 */ 35 36#define init_thread_info (init_task.thread.info) 37#define init_stack (init_thread_union.stack) 38 39#define task_thread_info(tsk) (&(tsk)->thread.info) 40#define task_stack_page(tsk) ((tsk)->stack) 41#define current_thread_info() task_thread_info(current) 42 43#define __HAVE_THREAD_FUNCTIONS 44 45#define setup_thread_stack(p, org) ({ \ 46 *(struct task_struct **)(p)->stack = (p); \ 47 task_thread_info(p)->task = (p); \ 48}) 49 50#define end_of_stack(p) ((unsigned long *)(p)->stack + 1) 51 52/* entry.S relies on these definitions! 53 * bits 0-7 are tested at every exception exit 54 * bits 8-15 are also tested at syscall exit 55 */ 56#define TIF_SIGPENDING 6 /* signal pending */ 57#define TIF_NEED_RESCHED 7 /* rescheduling necessary */ 58#define TIF_DELAYED_TRACE 14 /* single step a syscall */ 59#define TIF_SYSCALL_TRACE 15 /* syscall trace active */ 60#define TIF_MEMDIE 16 61 62#endif /* _ASM_M68K_THREAD_INFO_H */ 63