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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Tony Luck82f1b072005-09-13 08:50:39 -07008#ifndef ASM_OFFSETS_C
Sam Ravnborg0013a852005-09-09 20:57:26 +02009#include <asm/asm-offsets.h>
Tony Luck82f1b072005-09-13 08:50:39 -070010#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <asm/processor.h>
12#include <asm/ptrace.h>
13
14#define PREEMPT_ACTIVE_BIT 30
15#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
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 */
24struct thread_info {
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 */
Brent Casavante08e6c52006-01-26 15:55:52 -080029 __u32 last_cpu; /* Last CPU thread ran on */
Andi Kleen495ab9c2006-06-26 13:59:11 +020030 __u32 status; /* Thread synchronous flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 mm_segment_t addr_limit; /* user-level address space limit */
Jesper Juhldcd497f2005-06-23 00:09:07 -070032 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 struct restart_block restart_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034};
35
36#define THREAD_SIZE KERNEL_STACK_SIZE
37
38#define INIT_THREAD_INFO(tsk) \
39{ \
40 .task = &tsk, \
41 .exec_domain = &default_exec_domain, \
42 .flags = 0, \
43 .cpu = 0, \
44 .addr_limit = KERNEL_DS, \
45 .preempt_count = 0, \
46 .restart_block = { \
47 .fn = do_no_restart_syscall, \
48 }, \
49}
50
Tony Luck82f1b072005-09-13 08:50:39 -070051#ifndef ASM_OFFSETS_C
Linus Torvalds1da177e2005-04-16 15:20:36 -070052/* how to get the thread information struct from C */
53#define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
54#define alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
Al Viroab035912006-01-12 01:06:05 -080055#define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
Tony Luck82f1b072005-09-13 08:50:39 -070056#else
57#define current_thread_info() ((struct thread_info *) 0)
58#define alloc_thread_info(tsk) ((struct thread_info *) 0)
Al Viroab035912006-01-12 01:06:05 -080059#define task_thread_info(tsk) ((struct thread_info *) 0)
Tony Luck82f1b072005-09-13 08:50:39 -070060#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#define free_thread_info(ti) /* nothing */
Al Viroab035912006-01-12 01:06:05 -080062#define task_stack_page(tsk) ((void *)(tsk))
63
64#define __HAVE_THREAD_FUNCTIONS
65#define setup_thread_stack(p, org) \
66 *task_thread_info(p) = *task_thread_info(org); \
67 task_thread_info(p)->task = (p);
68#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
Cliff Wickman1df57c02006-04-25 10:47:48 -050071#define alloc_task_struct() ((task_t *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
73
74#endif /* !__ASSEMBLY */
75
76/*
77 * thread information flags
78 * - these are process state flags that various assembly files may need to access
79 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
80 * in top 16 bits
81 */
82#define TIF_NOTIFY_RESUME 0 /* resumption notification requested */
83#define TIF_SIGPENDING 1 /* signal pending */
84#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
85#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
86#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
88#define TIF_MEMDIE 17
Keith Owense619ae02005-09-11 17:20:14 +100089#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
Jason Uhlenkott15029282005-12-30 02:27:01 -080090#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
93#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
94#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
95#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
96#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
97#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
Keith Owense619ae02005-09-11 17:20:14 +100099#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
Jason Uhlenkott15029282005-12-30 02:27:01 -0800100#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102/* "work to do on user-return" bits */
Keith Owensb0a06622006-01-22 10:55:25 +1100103#define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
105#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
106
Andi Kleen495ab9c2006-06-26 13:59:11 +0200107#define TS_POLLING 1 /* true if in idle loop and not sleeping */
108
109#define tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING)
110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#endif /* _ASM_IA64_THREAD_INFO_H */