Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* thread_info.h: h8300 low-level thread information |
| 2 | * adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp> |
| 3 | * |
| 4 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) |
| 5 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller |
| 6 | */ |
| 7 | |
| 8 | #ifndef _ASM_THREAD_INFO_H |
| 9 | #define _ASM_THREAD_INFO_H |
| 10 | |
| 11 | #include <asm/page.h> |
| 12 | |
| 13 | #ifdef __KERNEL__ |
| 14 | |
| 15 | #ifndef __ASSEMBLY__ |
| 16 | |
| 17 | /* |
| 18 | * low level task data. |
| 19 | * If you change this, change the TI_* offsets below to match. |
| 20 | */ |
| 21 | struct thread_info { |
| 22 | struct task_struct *task; /* main task structure */ |
| 23 | struct exec_domain *exec_domain; /* execution domain */ |
| 24 | unsigned long flags; /* low level flags */ |
| 25 | int cpu; /* cpu we're on */ |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 26 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | struct restart_block restart_block; |
| 28 | }; |
| 29 | |
| 30 | /* |
| 31 | * macros/functions for gaining access to the thread information structure |
| 32 | */ |
| 33 | #define INIT_THREAD_INFO(tsk) \ |
| 34 | { \ |
| 35 | .task = &tsk, \ |
| 36 | .exec_domain = &default_exec_domain, \ |
| 37 | .flags = 0, \ |
| 38 | .cpu = 0, \ |
Peter Zijlstra | c99e6ef | 2009-07-10 14:57:56 +0200 | [diff] [blame] | 39 | .preempt_count = INIT_PREEMPT_COUNT, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | .restart_block = { \ |
| 41 | .fn = do_no_restart_syscall, \ |
| 42 | }, \ |
| 43 | } |
| 44 | |
| 45 | #define init_thread_info (init_thread_union.thread_info) |
| 46 | #define init_stack (init_thread_union.stack) |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * Size of kernel stack for each process. This must be a power of 2... |
| 51 | */ |
FUJITA Tomonori | b69c49b | 2008-07-25 01:45:40 -0700 | [diff] [blame] | 52 | #define THREAD_SIZE_ORDER 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define THREAD_SIZE 8192 /* 2 pages */ |
| 54 | |
| 55 | |
| 56 | /* how to get the thread information struct from C */ |
| 57 | static inline struct thread_info *current_thread_info(void) |
| 58 | { |
| 59 | struct thread_info *ti; |
| 60 | __asm__( |
| 61 | "mov.l sp, %0 \n\t" |
| 62 | "and.l %1, %0" |
| 63 | : "=&r"(ti) |
| 64 | : "i" (~(THREAD_SIZE-1)) |
| 65 | ); |
| 66 | return ti; |
| 67 | } |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #endif /* __ASSEMBLY__ */ |
| 70 | |
| 71 | /* |
| 72 | * Offsets in thread_info structure, used in assembly code |
| 73 | */ |
| 74 | #define TI_TASK 0 |
| 75 | #define TI_EXECDOMAIN 4 |
| 76 | #define TI_FLAGS 8 |
| 77 | #define TI_CPU 12 |
| 78 | #define TI_PRE_COUNT 16 |
| 79 | |
| 80 | #define PREEMPT_ACTIVE 0x4000000 |
| 81 | |
| 82 | /* |
| 83 | * thread information flag bit numbers |
| 84 | */ |
| 85 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
Stephane Eranian | a583f1b | 2007-07-31 00:38:00 -0700 | [diff] [blame] | 86 | #define TIF_SIGPENDING 1 /* signal pending */ |
| 87 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ |
Andreas Dilger | 0ddc932 | 2010-05-14 11:13:27 +0200 | [diff] [blame] | 88 | #define TIF_MEMDIE 4 /* is terminating due to OOM killer */ |
Stephane Eranian | a583f1b | 2007-07-31 00:38:00 -0700 | [diff] [blame] | 89 | #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ |
David Howells | d0420c8 | 2009-09-02 09:14:16 +0100 | [diff] [blame] | 90 | #define TIF_NOTIFY_RESUME 6 /* callback before returning to user */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* as above, but as bit values */ |
| 93 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
| 95 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) |
David Howells | d0420c8 | 2009-09-02 09:14:16 +0100 | [diff] [blame] | 96 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Al Viro | ff89357 | 2012-05-24 03:12:25 -0400 | [diff] [blame] | 98 | #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
| 99 | _TIF_NOTIFY_RESUME) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | #endif /* __KERNEL__ */ |
| 102 | |
| 103 | #endif /* _ASM_THREAD_INFO_H */ |