2 * Copyright (C) 2002-2003 Hewlett-Packard Co
3 * David Mosberger-Tang <davidm@hpl.hp.com>
5 #ifndef _ASM_IA64_THREAD_INFO_H
6 #define _ASM_IA64_THREAD_INFO_H
9 #include <asm/asm-offsets.h>
11 #include <asm/processor.h>
12 #include <asm/ptrace.h>
14 #define PREEMPT_ACTIVE_BIT 30
15 #define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
20 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
21 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
22 * without having to do pointer masking.
25 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */
26 struct exec_domain *exec_domain;/* execution domain */
27 __u32 flags; /* thread_info flags (see TIF_*) */
28 __u32 cpu; /* current CPU */
29 mm_segment_t addr_limit; /* user-level address space limit */
30 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
31 struct restart_block restart_block;
36 unsigned long start_time;
38 } sigdelayed; /* Saved information for TIF_SIGDELAYED */
41 #define THREAD_SIZE KERNEL_STACK_SIZE
43 #define INIT_THREAD_INFO(tsk) \
46 .exec_domain = &default_exec_domain, \
49 .addr_limit = KERNEL_DS, \
52 .fn = do_no_restart_syscall, \
57 /* how to get the thread information struct from C */
58 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
59 #define alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
61 #define current_thread_info() ((struct thread_info *) 0)
62 #define alloc_thread_info(tsk) ((struct thread_info *) 0)
64 #define free_thread_info(ti) /* nothing */
66 #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
67 #define alloc_task_struct() ((task_t *)__get_free_pages(GFP_KERNEL, KERNEL_STACK_SIZE_ORDER))
68 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
70 #endif /* !__ASSEMBLY */
73 * thread information flags
74 * - these are process state flags that various assembly files may need to access
75 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
78 #define TIF_NOTIFY_RESUME 0 /* resumption notification requested */
79 #define TIF_SIGPENDING 1 /* signal pending */
80 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
81 #define TIF_SYSCALL_TRACE 3 /* syscall trace active */
82 #define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
83 #define TIF_SIGDELAYED 5 /* signal delayed from MCA/INIT/NMI/PMI context */
84 #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
86 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
88 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
89 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
90 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
91 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
92 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
93 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
94 #define _TIF_SIGDELAYED (1 << TIF_SIGDELAYED)
95 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
96 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
98 /* "work to do on user-return" bits */
99 #define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SIGDELAYED)
100 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
101 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
103 #endif /* _ASM_IA64_THREAD_INFO_H */