Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_M68K_THREAD_INFO_H |
| 2 | #define _ASM_M68K_THREAD_INFO_H |
| 3 | |
| 4 | #include <asm/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <asm/page.h> |
| 6 | |
| 7 | struct thread_info { |
| 8 | struct task_struct *task; /* main task structure */ |
| 9 | struct exec_domain *exec_domain; /* execution domain */ |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 10 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | __u32 cpu; /* should always be 0 on m68k */ |
| 12 | struct restart_block restart_block; |
| 13 | |
| 14 | __u8 supervisor_stack[0]; |
| 15 | }; |
| 16 | |
| 17 | #define PREEMPT_ACTIVE 0x4000000 |
| 18 | |
| 19 | #define INIT_THREAD_INFO(tsk) \ |
| 20 | { \ |
| 21 | .task = &tsk, \ |
| 22 | .exec_domain = &default_exec_domain, \ |
| 23 | .restart_block = { \ |
| 24 | .fn = do_no_restart_syscall, \ |
| 25 | }, \ |
| 26 | } |
| 27 | |
| 28 | /* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */ |
| 29 | #if PAGE_SHIFT == 13 /* 8k machines */ |
| 30 | #define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0)) |
| 31 | #define free_thread_info(ti) free_pages((unsigned long)(ti),0) |
| 32 | #else /* otherwise assume 4k pages */ |
| 33 | #define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1)) |
| 34 | #define free_thread_info(ti) free_pages((unsigned long)(ti),1) |
| 35 | #endif /* PAGE_SHIFT == 13 */ |
| 36 | |
Al Viro | abd0375 | 2005-11-13 16:06:58 -0800 | [diff] [blame^] | 37 | #define init_thread_info (init_task.thread.info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define init_stack (init_thread_union.stack) |
| 39 | |
Al Viro | abd0375 | 2005-11-13 16:06:58 -0800 | [diff] [blame^] | 40 | #define task_thread_info(tsk) (&(tsk)->thread.info) |
| 41 | #define current_thread_info() task_thread_info(current) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #define __HAVE_THREAD_FUNCTIONS |
| 44 | |
Al Viro | abd0375 | 2005-11-13 16:06:58 -0800 | [diff] [blame^] | 45 | #define setup_thread_stack(p, org) ({ \ |
| 46 | *(struct task_struct **)(p)->thread_info = (p); \ |
| 47 | task_thread_info(p)->task = (p); \ |
| 48 | }) |
| 49 | |
| 50 | #define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1) |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| 53 | #define TIF_DELAYED_TRACE 1 /* single step a syscall */ |
| 54 | #define TIF_NOTIFY_RESUME 2 /* resumption notification requested */ |
| 55 | #define TIF_SIGPENDING 3 /* signal pending */ |
| 56 | #define TIF_NEED_RESCHED 4 /* rescheduling necessary */ |
| 57 | #define TIF_MEMDIE 5 |
| 58 | |
| 59 | extern int thread_flag_fixme(void); |
| 60 | |
| 61 | /* |
| 62 | * flag set/clear/test wrappers |
| 63 | * - pass TIF_xxxx constants to these functions |
| 64 | */ |
| 65 | |
| 66 | #define __set_tsk_thread_flag(tsk, flag, val) ({ \ |
| 67 | switch (flag) { \ |
| 68 | case TIF_SIGPENDING: \ |
| 69 | tsk->thread.work.sigpending = val; \ |
| 70 | break; \ |
| 71 | case TIF_NEED_RESCHED: \ |
| 72 | tsk->thread.work.need_resched = val; \ |
| 73 | break; \ |
| 74 | case TIF_SYSCALL_TRACE: \ |
| 75 | tsk->thread.work.syscall_trace = val; \ |
| 76 | break; \ |
| 77 | case TIF_MEMDIE: \ |
| 78 | tsk->thread.work.memdie = val; \ |
| 79 | break; \ |
| 80 | default: \ |
| 81 | thread_flag_fixme(); \ |
| 82 | } \ |
| 83 | }) |
| 84 | |
| 85 | #define __get_tsk_thread_flag(tsk, flag) ({ \ |
| 86 | int ___res; \ |
| 87 | switch (flag) { \ |
| 88 | case TIF_SIGPENDING: \ |
| 89 | ___res = tsk->thread.work.sigpending; \ |
| 90 | break; \ |
| 91 | case TIF_NEED_RESCHED: \ |
| 92 | ___res = tsk->thread.work.need_resched; \ |
| 93 | break; \ |
| 94 | case TIF_SYSCALL_TRACE: \ |
| 95 | ___res = tsk->thread.work.syscall_trace;\ |
| 96 | break; \ |
| 97 | case TIF_MEMDIE: \ |
| 98 | ___res = tsk->thread.work.memdie;\ |
| 99 | break; \ |
| 100 | default: \ |
| 101 | ___res = thread_flag_fixme(); \ |
| 102 | } \ |
| 103 | ___res; \ |
| 104 | }) |
| 105 | |
| 106 | #define __get_set_tsk_thread_flag(tsk, flag, val) ({ \ |
| 107 | int __res = __get_tsk_thread_flag(tsk, flag); \ |
| 108 | __set_tsk_thread_flag(tsk, flag, val); \ |
| 109 | __res; \ |
| 110 | }) |
| 111 | |
| 112 | #define set_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, ~0) |
| 113 | #define clear_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, 0) |
| 114 | #define test_and_set_tsk_thread_flag(tsk, flag) __get_set_tsk_thread_flag(tsk, flag, ~0) |
| 115 | #define test_tsk_thread_flag(tsk, flag) __get_tsk_thread_flag(tsk, flag) |
| 116 | |
| 117 | #define set_thread_flag(flag) set_tsk_thread_flag(current, flag) |
| 118 | #define clear_thread_flag(flag) clear_tsk_thread_flag(current, flag) |
| 119 | #define test_thread_flag(flag) test_tsk_thread_flag(current, flag) |
| 120 | |
| 121 | #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED) |
| 122 | #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED) |
| 123 | |
| 124 | #endif /* _ASM_M68K_THREAD_INFO_H */ |