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>
17 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
18 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
19 * without having to do pointer masking.
22 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */
23 struct exec_domain *exec_domain;/* execution domain */
24 __u32 flags; /* thread_info flags (see TIF_*) */
25 __u32 cpu; /* current CPU */
26 __u32 last_cpu; /* Last CPU thread ran on */
27 __u32 status; /* Thread synchronous flags */
28 mm_segment_t addr_limit; /* user-level address space limit */
29 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
30 struct restart_block restart_block;
31 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
39 #define THREAD_SIZE KERNEL_STACK_SIZE
41 #define INIT_THREAD_INFO(tsk) \
44 .exec_domain = &default_exec_domain, \
47 .addr_limit = KERNEL_DS, \
48 .preempt_count = INIT_PREEMPT_COUNT, \
50 .fn = do_no_restart_syscall, \
55 /* how to get the thread information struct from C */
56 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
57 #define alloc_thread_info_node(tsk, node) \
58 ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
59 #define task_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_node(tsk, node) ((struct thread_info *) 0)
63 #define task_thread_info(tsk) ((struct thread_info *) 0)
65 #define free_thread_info(ti) /* nothing */
66 #define task_stack_page(tsk) ((void *)(tsk))
68 #define __HAVE_THREAD_FUNCTIONS
69 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
70 #define setup_thread_stack(p, org) \
71 *task_thread_info(p) = *task_thread_info(org); \
72 task_thread_info(p)->ac_stime = 0; \
73 task_thread_info(p)->ac_utime = 0; \
74 task_thread_info(p)->task = (p);
76 #define setup_thread_stack(p, org) \
77 *task_thread_info(p) = *task_thread_info(org); \
78 task_thread_info(p)->task = (p);
80 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
82 #define alloc_task_struct_node(node) \
84 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \
85 KERNEL_STACK_SIZE_ORDER); \
86 struct task_struct *ret = page ? page_address(page) : NULL; \
90 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
92 #endif /* !__ASSEMBLY */
95 * thread information flags
96 * - these are process state flags that various assembly files may need to access
97 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
100 #define TIF_SIGPENDING 0 /* signal pending */
101 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */
102 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */
103 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
104 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
105 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
106 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */
107 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
108 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
109 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
111 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
112 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
113 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
114 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
115 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
116 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
117 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
118 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
119 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
120 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
122 /* "work to do on user-return" bits */
123 #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
124 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
125 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
126 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
128 #define TS_POLLING 1 /* true if in idle loop and not sleeping */
129 #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */
132 #define HAVE_SET_RESTORE_SIGMASK 1
133 static inline void set_restore_sigmask(void)
135 struct thread_info *ti = current_thread_info();
136 ti->status |= TS_RESTORE_SIGMASK;
137 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
139 static inline void clear_restore_sigmask(void)
141 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
143 static inline bool test_restore_sigmask(void)
145 return current_thread_info()->status & TS_RESTORE_SIGMASK;
147 static inline bool test_and_clear_restore_sigmask(void)
149 struct thread_info *ti = current_thread_info();
150 if (!(ti->status & TS_RESTORE_SIGMASK))
152 ti->status &= ~TS_RESTORE_SIGMASK;
155 #endif /* !__ASSEMBLY__ */
157 #endif /* _ASM_IA64_THREAD_INFO_H */