1#ifndef _LINUX_INIT_H
2#define _LINUX_INIT_H
3
4#include <linux/compiler.h>
5#include <linux/types.h>
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42#define __init __section(.init.text) __cold notrace
43#define __initdata __section(.init.data)
44#define __initconst __constsection(.init.rodata)
45#define __exitdata __section(.exit.data)
46#define __exit_call __used __section(.exitcall.exit)
47
48
49
50
51
52
53#ifdef CONFIG_BROKEN_RODATA
54#define __constsection(x)
55#else
56#define __constsection(x) __section(x)
57#endif
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76#define __ref __section(.ref.text) noinline
77#define __refdata __section(.ref.data)
78#define __refconst __constsection(.ref.rodata)
79
80
81#define __init_refok __ref
82#define __initdata_refok __refdata
83#define __exit_refok __ref
84
85
86#ifdef MODULE
87#define __exitused
88#else
89#define __exitused __used
90#endif
91
92#define __exit __section(.exit.text) __exitused __cold notrace
93
94
95#define __meminit __section(.meminit.text) __cold notrace
96#define __meminitdata __section(.meminit.data)
97#define __meminitconst __constsection(.meminit.rodata)
98#define __memexit __section(.memexit.text) __exitused __cold notrace
99#define __memexitdata __section(.memexit.data)
100#define __memexitconst __constsection(.memexit.rodata)
101
102
103#define __HEAD .section ".head.text","ax"
104#define __INIT .section ".init.text","ax"
105#define __FINIT .previous
106
107#define __INITDATA .section ".init.data","aw",%progbits
108#define __INITRODATA .section ".init.rodata","a",%progbits
109#define __FINITDATA .previous
110
111#define __MEMINIT .section ".meminit.text", "ax"
112#define __MEMINITDATA .section ".meminit.data", "aw"
113#define __MEMINITRODATA .section ".meminit.rodata", "a"
114
115
116#define __REF .section ".ref.text", "ax"
117#define __REFDATA .section ".ref.data", "aw"
118#define __REFCONST .section ".ref.rodata", "a"
119
120#ifndef __ASSEMBLY__
121
122
123
124typedef int (*initcall_t)(void);
125typedef void (*exitcall_t)(void);
126
127extern initcall_t __con_initcall_start[], __con_initcall_end[];
128extern initcall_t __security_initcall_start[], __security_initcall_end[];
129
130
131typedef void (*ctor_fn_t)(void);
132
133
134extern int do_one_initcall(initcall_t fn);
135extern char __initdata boot_command_line[];
136extern char *saved_command_line;
137extern unsigned int reset_devices;
138
139
140void setup_arch(char **);
141void prepare_namespace(void);
142void __init load_default_modules(void);
143int __init init_rootfs(void);
144
145extern void (*late_time_init)(void);
146
147extern bool initcall_debug;
148
149#endif
150
151#ifndef MODULE
152
153#ifndef __ASSEMBLY__
154
155#ifdef CONFIG_LTO
156
157
158
159
160
161
162#define LTO_REFERENCE_INITCALL(x) \
163 ; \
164 static __used __exit void *reference_##x(void) \
165 { \
166 return &x; \
167 }
168#else
169#define LTO_REFERENCE_INITCALL(x)
170#endif
171
172
173
174
175
176
177
178
179
180
181
182#define __define_initcall(fn, id) \
183 static initcall_t __initcall_##fn##id __used \
184 __attribute__((__section__(".initcall" #id ".init"))) = fn; \
185 LTO_REFERENCE_INITCALL(__initcall_##fn##id)
186
187
188
189
190
191
192#define early_initcall(fn) __define_initcall(fn, early)
193
194
195
196
197
198
199
200
201#define pure_initcall(fn) __define_initcall(fn, 0)
202
203#define core_initcall(fn) __define_initcall(fn, 1)
204#define core_initcall_sync(fn) __define_initcall(fn, 1s)
205#define postcore_initcall(fn) __define_initcall(fn, 2)
206#define postcore_initcall_sync(fn) __define_initcall(fn, 2s)
207#define arch_initcall(fn) __define_initcall(fn, 3)
208#define arch_initcall_sync(fn) __define_initcall(fn, 3s)
209#define subsys_initcall(fn) __define_initcall(fn, 4)
210#define subsys_initcall_sync(fn) __define_initcall(fn, 4s)
211#define fs_initcall(fn) __define_initcall(fn, 5)
212#define fs_initcall_sync(fn) __define_initcall(fn, 5s)
213#define rootfs_initcall(fn) __define_initcall(fn, rootfs)
214#define device_initcall(fn) __define_initcall(fn, 6)
215#define device_initcall_sync(fn) __define_initcall(fn, 6s)
216#define late_initcall(fn) __define_initcall(fn, 7)
217#define late_initcall_sync(fn) __define_initcall(fn, 7s)
218
219#define __initcall(fn) device_initcall(fn)
220
221#define __exitcall(fn) \
222 static exitcall_t __exitcall_##fn __exit_call = fn
223
224#define console_initcall(fn) \
225 static initcall_t __initcall_##fn \
226 __used __section(.con_initcall.init) = fn
227
228#define security_initcall(fn) \
229 static initcall_t __initcall_##fn \
230 __used __section(.security_initcall.init) = fn
231
232struct obs_kernel_param {
233 const char *str;
234 int (*setup_func)(char *);
235 int early;
236};
237
238
239
240
241
242
243
244#define __setup_param(str, unique_id, fn, early) \
245 static const char __setup_str_##unique_id[] __initconst \
246 __aligned(1) = str; \
247 static struct obs_kernel_param __setup_##unique_id \
248 __used __section(.init.setup) \
249 __attribute__((aligned((sizeof(long))))) \
250 = { __setup_str_##unique_id, fn, early }
251
252#define __setup(str, fn) \
253 __setup_param(str, fn, fn, 0)
254
255
256
257
258
259#define early_param(str, fn) \
260 __setup_param(str, fn, fn, 1)
261
262#define early_param_on_off(str_on, str_off, var, config) \
263 \
264 int var = IS_ENABLED(config); \
265 \
266 static int __init parse_##var##_on(char *arg) \
267 { \
268 var = 1; \
269 return 0; \
270 } \
271 __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \
272 \
273 static int __init parse_##var##_off(char *arg) \
274 { \
275 var = 0; \
276 return 0; \
277 } \
278 __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
279
280
281void __init parse_early_param(void);
282void __init parse_early_options(char *cmdline);
283#endif
284
285#else
286
287#define __setup_param(str, unique_id, fn)
288#define __setup(str, func)
289#endif
290
291
292#define __nosavedata __section(.data..nosave)
293
294#ifdef MODULE
295#define __exit_p(x) x
296#else
297#define __exit_p(x) NULL
298#endif
299
300#endif
301