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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 | ||
0013a854 | 8 | #include <asm/asm-offsets.h> |
1da177e4 LT |
9 | #include <asm/processor.h> |
10 | #include <asm/ptrace.h> | |
11 | ||
12 | #define PREEMPT_ACTIVE_BIT 30 | |
13 | #define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) | |
14 | ||
15 | #ifndef __ASSEMBLY__ | |
16 | ||
17 | /* | |
18 | * On IA-64, we want to keep the task structure and kernel stack together, so they can be | |
19 | * mapped by a single TLB entry and so they can be addressed by the "current" pointer | |
20 | * without having to do pointer masking. | |
21 | */ | |
22 | struct thread_info { | |
23 | struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ | |
24 | struct exec_domain *exec_domain;/* execution domain */ | |
25 | __u32 flags; /* thread_info flags (see TIF_*) */ | |
26 | __u32 cpu; /* current CPU */ | |
27 | mm_segment_t addr_limit; /* user-level address space limit */ | |
dcd497f9 | 28 | int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ |
1da177e4 LT |
29 | struct restart_block restart_block; |
30 | struct { | |
31 | int signo; | |
32 | int code; | |
33 | void __user *addr; | |
34 | unsigned long start_time; | |
35 | pid_t pid; | |
36 | } sigdelayed; /* Saved information for TIF_SIGDELAYED */ | |
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 = 0, \ | |
49 | .restart_block = { \ | |
50 | .fn = do_no_restart_syscall, \ | |
51 | }, \ | |
52 | } | |
53 | ||
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 alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) | |
57 | #define free_thread_info(ti) /* nothing */ | |
58 | ||
59 | #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR | |
60 | #define alloc_task_struct() ((task_t *)__get_free_pages(GFP_KERNEL, KERNEL_STACK_SIZE_ORDER)) | |
61 | #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) | |
62 | ||
63 | #endif /* !__ASSEMBLY */ | |
64 | ||
65 | /* | |
66 | * thread information flags | |
67 | * - these are process state flags that various assembly files may need to access | |
68 | * - pending work-to-be-done flags are in least-significant 16 bits, other flags | |
69 | * in top 16 bits | |
70 | */ | |
71 | #define TIF_NOTIFY_RESUME 0 /* resumption notification requested */ | |
72 | #define TIF_SIGPENDING 1 /* signal pending */ | |
73 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
74 | #define TIF_SYSCALL_TRACE 3 /* syscall trace active */ | |
75 | #define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */ | |
76 | #define TIF_SIGDELAYED 5 /* signal delayed from MCA/INIT/NMI/PMI context */ | |
77 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
78 | #define TIF_MEMDIE 17 | |
79 | ||
80 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
81 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
82 | #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) | |
83 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) | |
84 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
85 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
86 | #define _TIF_SIGDELAYED (1 << TIF_SIGDELAYED) | |
87 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
88 | ||
89 | /* "work to do on user-return" bits */ | |
90 | #define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SIGDELAYED) | |
91 | /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ | |
92 | #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) | |
93 | ||
94 | #endif /* _ASM_IA64_THREAD_INFO_H */ |