diff options
Diffstat (limited to 'include/asm-m68k/thread_info.h')
| -rw-r--r-- | include/asm-m68k/thread_info.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/include/asm-m68k/thread_info.h b/include/asm-m68k/thread_info.h new file mode 100644 index 000000000000..5f58939c59db --- /dev/null +++ b/include/asm-m68k/thread_info.h @@ -0,0 +1,118 @@ +#ifndef _ASM_M68K_THREAD_INFO_H +#define _ASM_M68K_THREAD_INFO_H + +#include <asm/types.h> +#include <asm/processor.h> +#include <asm/page.h> + +struct thread_info { + struct task_struct *task; /* main task structure */ + struct exec_domain *exec_domain; /* execution domain */ + __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ + __u32 cpu; /* should always be 0 on m68k */ + struct restart_block restart_block; + + __u8 supervisor_stack[0]; +}; + +#define PREEMPT_ACTIVE 0x4000000 + +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .exec_domain = &default_exec_domain, \ + .restart_block = { \ + .fn = do_no_restart_syscall, \ + }, \ +} + +/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */ +#if PAGE_SHIFT == 13 /* 8k machines */ +#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0)) +#define free_thread_info(ti) free_pages((unsigned long)(ti),0) +#else /* otherwise assume 4k pages */ +#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1)) +#define free_thread_info(ti) free_pages((unsigned long)(ti),1) +#endif /* PAGE_SHIFT == 13 */ + +//#define init_thread_info (init_task.thread.info) +#define init_stack (init_thread_union.stack) + +#define current_thread_info() (current->thread_info) + + +#define __HAVE_THREAD_FUNCTIONS + +#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ +#define TIF_DELAYED_TRACE 1 /* single step a syscall */ +#define TIF_NOTIFY_RESUME 2 /* resumption notification requested */ +#define TIF_SIGPENDING 3 /* signal pending */ +#define TIF_NEED_RESCHED 4 /* rescheduling necessary */ +#define TIF_MEMDIE 5 + +extern int thread_flag_fixme(void); + +/* + * flag set/clear/test wrappers + * - pass TIF_xxxx constants to these functions + */ + +#define __set_tsk_thread_flag(tsk, flag, val) ({ \ + switch (flag) { \ + case TIF_SIGPENDING: \ + tsk->thread.work.sigpending = val; \ + break; \ + case TIF_NEED_RESCHED: \ + tsk->thread.work.need_resched = val; \ + break; \ + case TIF_SYSCALL_TRACE: \ + tsk->thread.work.syscall_trace = val; \ + break; \ + case TIF_MEMDIE: \ + tsk->thread.work.memdie = val; \ + break; \ + default: \ + thread_flag_fixme(); \ + } \ +}) + +#define __get_tsk_thread_flag(tsk, flag) ({ \ + int ___res; \ + switch (flag) { \ + case TIF_SIGPENDING: \ + ___res = tsk->thread.work.sigpending; \ + break; \ + case TIF_NEED_RESCHED: \ + ___res = tsk->thread.work.need_resched; \ + break; \ + case TIF_SYSCALL_TRACE: \ + ___res = tsk->thread.work.syscall_trace;\ + break; \ + case TIF_MEMDIE: \ + ___res = tsk->thread.work.memdie;\ + break; \ + default: \ + ___res = thread_flag_fixme(); \ + } \ + ___res; \ +}) + +#define __get_set_tsk_thread_flag(tsk, flag, val) ({ \ + int __res = __get_tsk_thread_flag(tsk, flag); \ + __set_tsk_thread_flag(tsk, flag, val); \ + __res; \ +}) + +#define set_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, ~0) +#define clear_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, 0) +#define test_and_set_tsk_thread_flag(tsk, flag) __get_set_tsk_thread_flag(tsk, flag, ~0) +#define test_tsk_thread_flag(tsk, flag) __get_tsk_thread_flag(tsk, flag) + +#define set_thread_flag(flag) set_tsk_thread_flag(current, flag) +#define clear_thread_flag(flag) clear_tsk_thread_flag(current, flag) +#define test_thread_flag(flag) test_tsk_thread_flag(current, flag) + +#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED) +#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED) + +#endif /* _ASM_M68K_THREAD_INFO_H */ |