Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Tony Luck | 82f1b07 | 2005-09-13 08:50:39 -0700 | [diff] [blame] | 8 | #ifndef ASM_OFFSETS_C |
Sam Ravnborg | 0013a85 | 2005-09-09 20:57:26 +0200 | [diff] [blame] | 9 | #include <asm/asm-offsets.h> |
Tony Luck | 82f1b07 | 2005-09-13 08:50:39 -0700 | [diff] [blame] | 10 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #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 | */ |
| 24 | struct 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 Casavant | e08e6c5 | 2006-01-26 15:55:52 -0800 | [diff] [blame] | 29 | __u32 last_cpu; /* Last CPU thread ran on */ |
Andi Kleen | 495ab9c | 2006-06-26 13:59:11 +0200 | [diff] [blame] | 30 | __u32 status; /* Thread synchronous flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | mm_segment_t addr_limit; /* user-level address space limit */ |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 32 | int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | struct restart_block restart_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | }; |
| 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 Luck | 82f1b07 | 2005-09-13 08:50:39 -0700 | [diff] [blame] | 51 | #ifndef ASM_OFFSETS_C |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /* 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 Viro | ab03591 | 2006-01-12 01:06:05 -0800 | [diff] [blame] | 55 | #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) |
Tony Luck | 82f1b07 | 2005-09-13 08:50:39 -0700 | [diff] [blame] | 56 | #else |
| 57 | #define current_thread_info() ((struct thread_info *) 0) |
| 58 | #define alloc_thread_info(tsk) ((struct thread_info *) 0) |
Al Viro | ab03591 | 2006-01-12 01:06:05 -0800 | [diff] [blame] | 59 | #define task_thread_info(tsk) ((struct thread_info *) 0) |
Tony Luck | 82f1b07 | 2005-09-13 08:50:39 -0700 | [diff] [blame] | 60 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #define free_thread_info(ti) /* nothing */ |
Al Viro | ab03591 | 2006-01-12 01:06:05 -0800 | [diff] [blame] | 62 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR |
Cliff Wickman | 1df57c0 | 2006-04-25 10:47:48 -0500 | [diff] [blame] | 71 | #define alloc_task_struct() ((task_t *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
| 88 | #define TIF_MEMDIE 17 |
Keith Owens | e619ae0 | 2005-09-11 17:20:14 +1000 | [diff] [blame] | 89 | #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ |
Jason Uhlenkott | 1502928 | 2005-12-30 02:27:01 -0800 | [diff] [blame] | 90 | #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
Keith Owens | e619ae0 | 2005-09-11 17:20:14 +1000 | [diff] [blame] | 99 | #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) |
Jason Uhlenkott | 1502928 | 2005-12-30 02:27:01 -0800 | [diff] [blame] | 100 | #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | /* "work to do on user-return" bits */ |
Keith Owens | b0a0662 | 2006-01-22 10:55:25 +1100 | [diff] [blame] | 103 | #define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | /* 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 Kleen | 495ab9c | 2006-06-26 13:59:11 +0200 | [diff] [blame] | 107 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #endif /* _ASM_IA64_THREAD_INFO_H */ |