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b3901d54 CM |
1 | /* |
2 | * Based on arch/arm/include/asm/thread_info.h | |
3 | * | |
4 | * Copyright (C) 2002 Russell King. | |
5 | * Copyright (C) 2012 ARM Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | #ifndef __ASM_THREAD_INFO_H | |
20 | #define __ASM_THREAD_INFO_H | |
21 | ||
22 | #ifdef __KERNEL__ | |
23 | ||
24 | #include <linux/compiler.h> | |
25 | ||
26 | #ifndef CONFIG_ARM64_64K_PAGES | |
79f783f0 | 27 | #define THREAD_SIZE_ORDER 2 |
b3901d54 CM |
28 | #endif |
29 | ||
79f783f0 | 30 | #define THREAD_SIZE 16384 |
b3901d54 CM |
31 | #define THREAD_START_SP (THREAD_SIZE - 16) |
32 | ||
33 | #ifndef __ASSEMBLY__ | |
34 | ||
35 | struct task_struct; | |
36 | struct exec_domain; | |
37 | ||
38 | #include <asm/types.h> | |
39 | ||
40 | typedef unsigned long mm_segment_t; | |
41 | ||
42 | /* | |
43 | * low level task data that entry.S needs immediate access to. | |
44 | * __switch_to() assumes cpu_context follows immediately after cpu_domain. | |
45 | */ | |
46 | struct thread_info { | |
47 | unsigned long flags; /* low level flags */ | |
48 | mm_segment_t addr_limit; /* address limit */ | |
49 | struct task_struct *task; /* main task structure */ | |
50 | struct exec_domain *exec_domain; /* execution domain */ | |
51 | struct restart_block restart_block; | |
52 | int preempt_count; /* 0 => preemptable, <0 => bug */ | |
53 | int cpu; /* cpu */ | |
6fa3eb70 S |
54 | void *regs_on_excp; |
55 | int cpu_excp; | |
b3901d54 CM |
56 | }; |
57 | ||
58 | #define INIT_THREAD_INFO(tsk) \ | |
59 | { \ | |
60 | .task = &tsk, \ | |
61 | .exec_domain = &default_exec_domain, \ | |
62 | .flags = 0, \ | |
63 | .preempt_count = INIT_PREEMPT_COUNT, \ | |
64 | .addr_limit = KERNEL_DS, \ | |
65 | .restart_block = { \ | |
66 | .fn = do_no_restart_syscall, \ | |
67 | }, \ | |
6fa3eb70 | 68 | .cpu_excp = 0, \ |
b3901d54 CM |
69 | } |
70 | ||
71 | #define init_thread_info (init_thread_union.thread_info) | |
72 | #define init_stack (init_thread_union.stack) | |
73 | ||
74 | /* | |
75 | * how to get the thread information struct from C | |
76 | */ | |
77 | static inline struct thread_info *current_thread_info(void) __attribute_const__; | |
78 | ||
79 | static inline struct thread_info *current_thread_info(void) | |
80 | { | |
81 | register unsigned long sp asm ("sp"); | |
82 | return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); | |
83 | } | |
84 | ||
85 | #define thread_saved_pc(tsk) \ | |
86 | ((unsigned long)(tsk->thread.cpu_context.pc)) | |
87 | #define thread_saved_sp(tsk) \ | |
88 | ((unsigned long)(tsk->thread.cpu_context.sp)) | |
89 | #define thread_saved_fp(tsk) \ | |
90 | ((unsigned long)(tsk->thread.cpu_context.fp)) | |
91 | ||
92 | #endif | |
93 | ||
94 | /* | |
95 | * We use bit 30 of the preempt_count to indicate that kernel | |
96 | * preemption is occurring. See <asm/hardirq.h>. | |
97 | */ | |
98 | #define PREEMPT_ACTIVE 0x40000000 | |
99 | ||
100 | /* | |
101 | * thread information flags: | |
102 | * TIF_SYSCALL_TRACE - syscall trace active | |
6fa3eb70 S |
103 | * TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace |
104 | * TIF_SYSCALL_AUDIT - syscall auditing | |
105 | * TIF_SECOMP - syscall secure computing | |
b3901d54 CM |
106 | * TIF_SIGPENDING - signal pending |
107 | * TIF_NEED_RESCHED - rescheduling necessary | |
108 | * TIF_NOTIFY_RESUME - callback before returning to user | |
109 | * TIF_USEDFPU - FPU was used by this task this quantum (SMP) | |
110 | * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED | |
111 | */ | |
112 | #define TIF_SIGPENDING 0 | |
113 | #define TIF_NEED_RESCHED 1 | |
114 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ | |
6fa3eb70 | 115 | #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ |
b3901d54 | 116 | #define TIF_SYSCALL_TRACE 8 |
6fa3eb70 S |
117 | #define TIF_SYSCALL_AUDIT 9 |
118 | #define TIF_SYSCALL_TRACEPOINT 10 | |
119 | #define TIF_SECCOMP 11 | |
b3901d54 CM |
120 | #define TIF_POLLING_NRFLAG 16 |
121 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ | |
122 | #define TIF_FREEZE 19 | |
123 | #define TIF_RESTORE_SIGMASK 20 | |
124 | #define TIF_SINGLESTEP 21 | |
125 | #define TIF_32BIT 22 /* 32bit process */ | |
126 | #define TIF_SWITCH_MM 23 /* deferred switch_mm */ | |
127 | ||
128 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
129 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
130 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) | |
6fa3eb70 S |
131 | #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) |
132 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
133 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
134 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) | |
135 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) | |
b3901d54 CM |
136 | #define _TIF_32BIT (1 << TIF_32BIT) |
137 | ||
138 | #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ | |
6fa3eb70 S |
139 | _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE) |
140 | ||
141 | #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ | |
142 | _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) | |
b3901d54 CM |
143 | |
144 | #endif /* __KERNEL__ */ | |
145 | #endif /* __ASM_THREAD_INFO_H */ |