2 * Copyright (C) 2004-2006 Atmel Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 #ifndef __ASM_AVR32_THREAD_INFO_H
9 #define __ASM_AVR32_THREAD_INFO_H
13 #define THREAD_SIZE_ORDER 1
14 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
17 #include <asm/types.h>
23 struct task_struct *task; /* main task structure */
24 struct exec_domain *exec_domain; /* execution domain */
25 unsigned long flags; /* low level flags */
27 __s32 preempt_count; /* 0 => preemptable, <0 => BUG */
28 __u32 rar_saved; /* return address... */
29 __u32 rsr_saved; /* ...and status register
30 saved by debug handler
33 __u8 supervisor_stack[0];
36 #define INIT_THREAD_INFO(tsk) \
39 .exec_domain = &default_exec_domain, \
42 .preempt_count = INIT_PREEMPT_COUNT, \
45 #define init_thread_info (init_thread_union.thread_info)
46 #define init_stack (init_thread_union.stack)
49 * Get the thread information struct from C.
50 * We do the usual trick and use the lower end of the stack for this
52 static inline struct thread_info *current_thread_info(void)
54 unsigned long addr = ~(THREAD_SIZE - 1);
56 asm("and %0, sp" : "=r"(addr) : "0"(addr));
57 return (struct thread_info *)addr;
60 #define get_thread_info(ti) get_task_struct((ti)->task)
61 #define put_thread_info(ti) put_task_struct((ti)->task)
63 #endif /* !__ASSEMBLY__ */
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 LSW
69 * - other flags in MSW
71 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
72 #define TIF_SIGPENDING 1 /* signal pending */
73 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
74 #define TIF_BREAKPOINT 4 /* enter monitor mode on return */
75 #define TIF_SINGLE_STEP 5 /* single step in progress */
76 #define TIF_MEMDIE 6 /* is terminating due to OOM killer */
77 #define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
78 #define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
79 #define TIF_NOTIFY_RESUME 9 /* callback before returning to user */
80 #define TIF_DEBUG 30 /* debugging enabled */
81 #define TIF_USERSPACE 31 /* true if FS sets userspace */
83 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
84 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
85 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
86 #define _TIF_BREAKPOINT (1 << TIF_BREAKPOINT)
87 #define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
88 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
89 #define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
90 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
92 /* Note: The masks below must never span more than 16 bits! */
94 /* work to do on interrupt/exception return */
95 #define _TIF_WORK_MASK \
97 | _TIF_NOTIFY_RESUME \
101 /* work to do on any return to userspace */
102 #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
103 /* work to do on return from debug mode */
104 #define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~_TIF_BREAKPOINT)
106 #endif /* __ASM_AVR32_THREAD_INFO_H */