1#ifndef _ASM_PARISC_THREAD_INFO_H 2#define _ASM_PARISC_THREAD_INFO_H 3 4#ifdef __KERNEL__ 5 6#ifndef __ASSEMBLY__ 7#include <asm/processor.h> 8 9struct thread_info { 10 struct task_struct *task; /* main task structure */ 11 struct exec_domain *exec_domain;/* execution domain */ 12 unsigned long flags; /* thread_info flags (see TIF_*) */ 13 mm_segment_t addr_limit; /* user-level address space limit */ 14 __u32 cpu; /* current CPU */ 15 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 16 struct restart_block restart_block; 17}; 18 19#define INIT_THREAD_INFO(tsk) \ 20{ \ 21 .task = &tsk, \ 22 .exec_domain = &default_exec_domain, \ 23 .flags = 0, \ 24 .cpu = 0, \ 25 .addr_limit = KERNEL_DS, \ 26 .preempt_count = INIT_PREEMPT_COUNT, \ 27 .restart_block = { \ 28 .fn = do_no_restart_syscall \ 29 } \ 30} 31 32#define init_thread_info (init_thread_union.thread_info) 33#define init_stack (init_thread_union.stack) 34 35/* how to get the thread information struct from C */ 36#define current_thread_info() ((struct thread_info *)mfctl(30)) 37 38#endif /* !__ASSEMBLY */ 39 40/* thread information allocation */ 41 42#define THREAD_SIZE_ORDER 2 43/* Be sure to hunt all references to this down when you change the size of 44 * the kernel stack */ 45#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 46#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER) 47 48#define PREEMPT_ACTIVE_BIT 28 49#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) 50 51/* 52 * thread information flags 53 */ 54#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 55#define TIF_SIGPENDING 1 /* signal pending */ 56#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 57#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 58#define TIF_32BIT 4 /* 32 bit binary */ 59#define TIF_MEMDIE 5 60#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */ 61#define TIF_FREEZE 7 /* is freezing for suspend */ 62#define TIF_NOTIFY_RESUME 8 /* callback before returning to user */ 63#define TIF_SINGLESTEP 9 /* single stepping? */ 64#define TIF_BLOCKSTEP 10 /* branch stepping? */ 65 66#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 67#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 68#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 69#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 70#define _TIF_32BIT (1 << TIF_32BIT) 71#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) 72#define _TIF_FREEZE (1 << TIF_FREEZE) 73#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 74#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 75#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP) 76 77#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \ 78 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK) 79 80#endif /* __KERNEL__ */ 81 82#endif /* _ASM_PARISC_THREAD_INFO_H */ 83