1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2002-2003 Hewlett-Packard Co
4 * David Mosberger-Tang <davidm@hpl.hp.com>
5 */
6 #ifndef _ASM_IA64_THREAD_INFO_H
7 #define _ASM_IA64_THREAD_INFO_H
8
9 #ifndef ASM_OFFSETS_C
10 #include <asm/asm-offsets.h>
11 #endif
12 #include <asm/processor.h>
13 #include <asm/ptrace.h>
14
15 #define THREAD_SIZE KERNEL_STACK_SIZE
16
17 #ifndef __ASSEMBLY__
18
19 /*
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.
23 */
24 struct thread_info {
25 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */
26 __u32 flags; /* thread_info flags (see TIF_*) */
27 __u32 cpu; /* current CPU */
28 __u32 last_cpu; /* Last CPU thread ran on */
29 __u32 status; /* Thread synchronous flags */
30 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
31 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
32 __u64 utime;
33 __u64 stime;
34 __u64 gtime;
35 __u64 hardirq_time;
36 __u64 softirq_time;
37 __u64 idle_time;
38 __u64 ac_stamp;
39 __u64 ac_leave;
40 __u64 ac_stime;
41 __u64 ac_utime;
42 #endif
43 };
44
45 #define INIT_THREAD_INFO(tsk) \
46 { \
47 .task = &tsk, \
48 .flags = 0, \
49 .cpu = 0, \
50 .preempt_count = INIT_PREEMPT_COUNT, \
51 }
52
53 #ifndef ASM_OFFSETS_C
54 /* how to get the thread information struct from C */
55 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
56 #define arch_alloc_thread_stack_node(tsk, node) \
57 ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE))
58 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
59 #else
60 #define current_thread_info() ((struct thread_info *) 0)
61 #define arch_alloc_thread_stack_node(tsk, node) ((unsigned long *) 0)
62 #define task_thread_info(tsk) ((struct thread_info *) 0)
63 #endif
64 #define arch_free_thread_stack(tsk) /* nothing */
65 #define task_stack_page(tsk) ((void *)(tsk))
66
67 #define __HAVE_THREAD_FUNCTIONS
68 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
69 #define setup_thread_stack(p, org) \
70 *task_thread_info(p) = *task_thread_info(org); \
71 task_thread_info(p)->ac_stime = 0; \
72 task_thread_info(p)->ac_utime = 0; \
73 task_thread_info(p)->task = (p);
74 #else
75 #define setup_thread_stack(p, org) \
76 *task_thread_info(p) = *task_thread_info(org); \
77 task_thread_info(p)->task = (p);
78 #endif
79 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
80
81 #define alloc_task_struct_node(node) \
82 ({ \
83 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \
84 KERNEL_STACK_SIZE_ORDER); \
85 struct task_struct *ret = page ? page_address(page) : NULL; \
86 \
87 ret; \
88 })
89 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
90
91 #endif /* !__ASSEMBLY */
92
93 /*
94 * thread information flags
95 * - these are process state flags that various assembly files may need to access
96 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
97 * in top 16 bits
98 */
99 #define TIF_SIGPENDING 0 /* signal pending */
100 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */
101 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */
102 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
103 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
104 #define TIF_NOTIFY_SIGNAL 5 /* signal notification exist */
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 #define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */
111
112 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
113 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
114 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
115 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
116 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
117 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
118 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
119 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
120 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
121 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
122 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)
123 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
124
125 /* "work to do on user-return" bits */
126 #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
127 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_NOTIFY_SIGNAL)
128 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
129 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
130
131 #endif /* _ASM_IA64_THREAD_INFO_H */
132
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