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5f97f7f9 HS |
1 | /* |
2 | * Copyright (C) 2004-2006 Atmel Corporation | |
3 | * | |
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. | |
7 | */ | |
8 | #ifndef __ASM_AVR32_THREAD_INFO_H | |
9 | #define __ASM_AVR32_THREAD_INFO_H | |
10 | ||
11 | #include <asm/page.h> | |
12 | ||
13 | #define THREAD_SIZE_ORDER 1 | |
14 | #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) | |
15 | ||
16 | #ifndef __ASSEMBLY__ | |
17 | #include <asm/types.h> | |
18 | ||
19 | struct task_struct; | |
20 | struct exec_domain; | |
21 | ||
22 | struct thread_info { | |
23 | struct task_struct *task; /* main task structure */ | |
24 | struct exec_domain *exec_domain; /* execution domain */ | |
25 | unsigned long flags; /* low level flags */ | |
26 | __u32 cpu; | |
27 | __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ | |
2507bc13 HS |
28 | __u32 rar_saved; /* return address... */ |
29 | __u32 rsr_saved; /* ...and status register | |
30 | saved by debug handler | |
31 | when setting up | |
32 | trampoline */ | |
5f97f7f9 HS |
33 | struct restart_block restart_block; |
34 | __u8 supervisor_stack[0]; | |
35 | }; | |
36 | ||
37 | #define INIT_THREAD_INFO(tsk) \ | |
38 | { \ | |
39 | .task = &tsk, \ | |
40 | .exec_domain = &default_exec_domain, \ | |
41 | .flags = 0, \ | |
42 | .cpu = 0, \ | |
43 | .preempt_count = 1, \ | |
44 | .restart_block = { \ | |
45 | .fn = do_no_restart_syscall \ | |
46 | } \ | |
47 | } | |
48 | ||
49 | #define init_thread_info (init_thread_union.thread_info) | |
50 | #define init_stack (init_thread_union.stack) | |
51 | ||
52 | /* | |
53 | * Get the thread information struct from C. | |
54 | * We do the usual trick and use the lower end of the stack for this | |
55 | */ | |
56 | static inline struct thread_info *current_thread_info(void) | |
57 | { | |
58 | unsigned long addr = ~(THREAD_SIZE - 1); | |
59 | ||
60 | asm("and %0, sp" : "=r"(addr) : "0"(addr)); | |
61 | return (struct thread_info *)addr; | |
62 | } | |
63 | ||
5f97f7f9 HS |
64 | #define get_thread_info(ti) get_task_struct((ti)->task) |
65 | #define put_thread_info(ti) put_task_struct((ti)->task) | |
66 | ||
67 | #endif /* !__ASSEMBLY__ */ | |
68 | ||
69 | #define PREEMPT_ACTIVE 0x40000000 | |
70 | ||
71 | /* | |
72 | * Thread information flags | |
73 | * - these are process state flags that various assembly files may need to access | |
74 | * - pending work-to-be-done flags are in LSW | |
75 | * - other flags in MSW | |
76 | */ | |
77 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
78 | #define TIF_SIGPENDING 1 /* signal pending */ |
79 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
80 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
5f97f7f9 | 81 | TIF_NEED_RESCHED */ |
2507bc13 HS |
82 | #define TIF_BREAKPOINT 4 /* enter monitor mode on return */ |
83 | #define TIF_SINGLE_STEP 5 /* single step in progress */ | |
a583f1b5 SE |
84 | #define TIF_MEMDIE 6 |
85 | #define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */ | |
86 | #define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */ | |
02a00cf6 | 87 | #define TIF_FREEZE 29 |
13b54a50 | 88 | #define TIF_DEBUG 30 /* debugging enabled */ |
5f97f7f9 HS |
89 | #define TIF_USERSPACE 31 /* true if FS sets userspace */ |
90 | ||
91 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
5f97f7f9 HS |
92 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
93 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
94 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
5f97f7f9 HS |
95 | #define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP) |
96 | #define _TIF_MEMDIE (1 << TIF_MEMDIE) | |
97 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) | |
19b7ce8b | 98 | #define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP) |
83224b08 | 99 | #define _TIF_FREEZE (1 << TIF_FREEZE) |
5f97f7f9 | 100 | |
702f22b3 HS |
101 | /* Note: The masks below must never span more than 16 bits! */ |
102 | ||
5f97f7f9 | 103 | /* work to do on interrupt/exception return */ |
702f22b3 HS |
104 | #define _TIF_WORK_MASK \ |
105 | ((1 << TIF_SIGPENDING) \ | |
106 | | (1 << TIF_NEED_RESCHED) \ | |
107 | | (1 << TIF_POLLING_NRFLAG) \ | |
108 | | (1 << TIF_BREAKPOINT) \ | |
109 | | (1 << TIF_RESTORE_SIGMASK)) | |
110 | ||
5f97f7f9 | 111 | /* work to do on any return to userspace */ |
702f22b3 | 112 | #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | (1 << TIF_SYSCALL_TRACE)) |
5f97f7f9 | 113 | /* work to do on return from debug mode */ |
2507bc13 | 114 | #define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~(1 << TIF_BREAKPOINT)) |
5f97f7f9 HS |
115 | |
116 | #endif /* __ASM_AVR32_THREAD_INFO_H */ |