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1/*
2 * Copyright (C) 2002-2003 Hewlett-Packard Co
3 * David Mosberger-Tang <davidm@hpl.hp.com>
4 */
5#ifndef _ASM_IA64_THREAD_INFO_H
6#define _ASM_IA64_THREAD_INFO_H
7
8#ifndef ASM_OFFSETS_C
9#include <asm/asm-offsets.h>
10#endif
11#include <asm/processor.h>
12#include <asm/ptrace.h>
13
14#ifndef __ASSEMBLY__
15
16/*
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.
20 */
21struct thread_info {
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
32 __u64 ac_stamp;
33 __u64 ac_leave;
34 __u64 ac_stime;
35 __u64 ac_utime;
36#endif
37};
38
39#define THREAD_SIZE KERNEL_STACK_SIZE
40
41#define INIT_THREAD_INFO(tsk) \
42{ \
43 .task = &tsk, \
44 .exec_domain = &default_exec_domain, \
45 .flags = 0, \
46 .cpu = 0, \
47 .addr_limit = KERNEL_DS, \
48 .preempt_count = INIT_PREEMPT_COUNT, \
49 .restart_block = { \
50 .fn = do_no_restart_syscall, \
51 }, \
52}
53
54#ifndef ASM_OFFSETS_C
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))
60#else
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)
64#endif
65#define free_thread_info(ti) /* nothing */
66#define task_stack_page(tsk) ((void *)(tsk))
67
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);
75#else
76#define setup_thread_stack(p, org) \
77 *task_thread_info(p) = *task_thread_info(org); \
78 task_thread_info(p)->task = (p);
79#endif
80#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
81
82#define alloc_task_struct_node(node) \
83({ \
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; \
87 \
88 ret; \
89})
90#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
91
92#endif /* !__ASSEMBLY */
93
94/*
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
98 * in top 16 bits
99 */
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 */
110
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)
121
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))
127
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() */
130
131#ifndef __ASSEMBLY__
132#define HAVE_SET_RESTORE_SIGMASK 1
133static inline void set_restore_sigmask(void)
134{
135 struct thread_info *ti = current_thread_info();
136 ti->status |= TS_RESTORE_SIGMASK;
137 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
138}
139static inline void clear_restore_sigmask(void)
140{
141 current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
142}
143static inline bool test_restore_sigmask(void)
144{
145 return current_thread_info()->status & TS_RESTORE_SIGMASK;
146}
147static inline bool test_and_clear_restore_sigmask(void)
148{
149 struct thread_info *ti = current_thread_info();
150 if (!(ti->status & TS_RESTORE_SIGMASK))
151 return false;
152 ti->status &= ~TS_RESTORE_SIGMASK;
153 return true;
154}
155#endif /* !__ASSEMBLY__ */
156
157#endif /* _ASM_IA64_THREAD_INFO_H */
1/*
2 * Copyright (C) 2002-2003 Hewlett-Packard Co
3 * David Mosberger-Tang <davidm@hpl.hp.com>
4 */
5#ifndef _ASM_IA64_THREAD_INFO_H
6#define _ASM_IA64_THREAD_INFO_H
7
8#ifndef ASM_OFFSETS_C
9#include <asm/asm-offsets.h>
10#endif
11#include <asm/processor.h>
12#include <asm/ptrace.h>
13
14#ifndef __ASSEMBLY__
15
16/*
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.
20 */
21struct thread_info {
22 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */
23 __u32 flags; /* thread_info flags (see TIF_*) */
24 __u32 cpu; /* current CPU */
25 __u32 last_cpu; /* Last CPU thread ran on */
26 __u32 status; /* Thread synchronous flags */
27 mm_segment_t addr_limit; /* user-level address space limit */
28 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
29#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
30 __u64 ac_stamp;
31 __u64 ac_leave;
32 __u64 ac_stime;
33 __u64 ac_utime;
34#endif
35};
36
37#define THREAD_SIZE KERNEL_STACK_SIZE
38
39#define INIT_THREAD_INFO(tsk) \
40{ \
41 .task = &tsk, \
42 .flags = 0, \
43 .cpu = 0, \
44 .addr_limit = KERNEL_DS, \
45 .preempt_count = INIT_PREEMPT_COUNT, \
46}
47
48#ifndef ASM_OFFSETS_C
49/* how to get the thread information struct from C */
50#define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
51#define alloc_thread_stack_node(tsk, node) \
52 ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE))
53#define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
54#else
55#define current_thread_info() ((struct thread_info *) 0)
56#define alloc_thread_stack_node(tsk, node) ((unsigned long *) 0)
57#define task_thread_info(tsk) ((struct thread_info *) 0)
58#endif
59#define free_thread_stack(tsk) /* nothing */
60#define task_stack_page(tsk) ((void *)(tsk))
61
62#define __HAVE_THREAD_FUNCTIONS
63#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
64#define setup_thread_stack(p, org) \
65 *task_thread_info(p) = *task_thread_info(org); \
66 task_thread_info(p)->ac_stime = 0; \
67 task_thread_info(p)->ac_utime = 0; \
68 task_thread_info(p)->task = (p);
69#else
70#define setup_thread_stack(p, org) \
71 *task_thread_info(p) = *task_thread_info(org); \
72 task_thread_info(p)->task = (p);
73#endif
74#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
75
76#define alloc_task_struct_node(node) \
77({ \
78 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \
79 KERNEL_STACK_SIZE_ORDER); \
80 struct task_struct *ret = page ? page_address(page) : NULL; \
81 \
82 ret; \
83})
84#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
85
86#endif /* !__ASSEMBLY */
87
88/*
89 * thread information flags
90 * - these are process state flags that various assembly files may need to access
91 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
92 * in top 16 bits
93 */
94#define TIF_SIGPENDING 0 /* signal pending */
95#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
96#define TIF_SYSCALL_TRACE 2 /* syscall trace active */
97#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
98#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
99#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
100#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
101#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
102#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
103#define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */
104#define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */
105
106#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
107#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
108#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
109#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
110#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
111#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
112#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
113#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
114#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
115#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
116#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
117
118/* "work to do on user-return" bits */
119#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
120 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
121/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
122#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
123
124#endif /* _ASM_IA64_THREAD_INFO_H */