1
2#ifndef _LINUX_INIT_H
3#define _LINUX_INIT_H
4
5#include <linux/compiler.h>
6#include <linux/types.h>
7
8
9#if defined(__noretpoline) && !defined(MODULE)
10#define __noinitretpoline __noretpoline
11#else
12#define __noinitretpoline
13#endif
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50#define __init __section(.init.text) __cold __latent_entropy __noinitretpoline
51#define __initdata __section(.init.data)
52#define __initconst __section(.init.rodata)
53#define __exitdata __section(.exit.data)
54#define __exit_call __used __section(.exitcall.exit)
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73#define __ref __section(.ref.text) noinline
74#define __refdata __section(.ref.data)
75#define __refconst __section(.ref.rodata)
76
77#ifdef MODULE
78#define __exitused
79#else
80#define __exitused __used
81#endif
82
83#define __exit __section(.exit.text) __exitused __cold notrace
84
85
86#define __meminit __section(.meminit.text) __cold notrace \
87 __latent_entropy
88#define __meminitdata __section(.meminit.data)
89#define __meminitconst __section(.meminit.rodata)
90#define __memexit __section(.memexit.text) __exitused __cold notrace
91#define __memexitdata __section(.memexit.data)
92#define __memexitconst __section(.memexit.rodata)
93
94
95#define __HEAD .section ".head.text","ax"
96#define __INIT .section ".init.text","ax"
97#define __FINIT .previous
98
99#define __INITDATA .section ".init.data","aw",%progbits
100#define __INITRODATA .section ".init.rodata","a",%progbits
101#define __FINITDATA .previous
102
103#define __MEMINIT .section ".meminit.text", "ax"
104#define __MEMINITDATA .section ".meminit.data", "aw"
105#define __MEMINITRODATA .section ".meminit.rodata", "a"
106
107
108#define __REF .section ".ref.text", "ax"
109#define __REFDATA .section ".ref.data", "aw"
110#define __REFCONST .section ".ref.rodata", "a"
111
112#ifndef __ASSEMBLY__
113
114
115
116typedef int (*initcall_t)(void);
117typedef void (*exitcall_t)(void);
118
119#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
120typedef int initcall_entry_t;
121
122static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
123{
124 return offset_to_ptr(entry);
125}
126#else
127typedef initcall_t initcall_entry_t;
128
129static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
130{
131 return *entry;
132}
133#endif
134
135extern initcall_entry_t __con_initcall_start[], __con_initcall_end[];
136
137
138typedef void (*ctor_fn_t)(void);
139
140
141extern int do_one_initcall(initcall_t fn);
142extern char __initdata boot_command_line[];
143extern char *saved_command_line;
144extern unsigned int reset_devices;
145
146
147void setup_arch(char **);
148void prepare_namespace(void);
149void __init load_default_modules(void);
150int __init init_rootfs(void);
151
152#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
153extern bool rodata_enabled;
154#endif
155#ifdef CONFIG_STRICT_KERNEL_RWX
156void mark_rodata_ro(void);
157#endif
158
159extern void (*late_time_init)(void);
160
161extern bool initcall_debug;
162
163#endif
164
165#ifndef MODULE
166
167#ifndef __ASSEMBLY__
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185#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
186#define ___define_initcall(fn, id, __sec) \
187 __ADDRESSABLE(fn) \
188 asm(".section \"" #__sec ".init\", \"a\" \n" \
189 "__initcall_" #fn #id ": \n" \
190 ".long " #fn " - . \n" \
191 ".previous \n");
192#else
193#define ___define_initcall(fn, id, __sec) \
194 static initcall_t __initcall_##fn##id __used \
195 __attribute__((__section__(#__sec ".init"))) = fn;
196#endif
197
198#define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
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205#define early_initcall(fn) __define_initcall(fn, early)
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214#define pure_initcall(fn) __define_initcall(fn, 0)
215
216#define core_initcall(fn) __define_initcall(fn, 1)
217#define core_initcall_sync(fn) __define_initcall(fn, 1s)
218#define postcore_initcall(fn) __define_initcall(fn, 2)
219#define postcore_initcall_sync(fn) __define_initcall(fn, 2s)
220#define arch_initcall(fn) __define_initcall(fn, 3)
221#define arch_initcall_sync(fn) __define_initcall(fn, 3s)
222#define subsys_initcall(fn) __define_initcall(fn, 4)
223#define subsys_initcall_sync(fn) __define_initcall(fn, 4s)
224#define fs_initcall(fn) __define_initcall(fn, 5)
225#define fs_initcall_sync(fn) __define_initcall(fn, 5s)
226#define rootfs_initcall(fn) __define_initcall(fn, rootfs)
227#define device_initcall(fn) __define_initcall(fn, 6)
228#define device_initcall_sync(fn) __define_initcall(fn, 6s)
229#define late_initcall(fn) __define_initcall(fn, 7)
230#define late_initcall_sync(fn) __define_initcall(fn, 7s)
231
232#define __initcall(fn) device_initcall(fn)
233
234#define __exitcall(fn) \
235 static exitcall_t __exitcall_##fn __exit_call = fn
236
237#define console_initcall(fn) ___define_initcall(fn,, .con_initcall)
238
239struct obs_kernel_param {
240 const char *str;
241 int (*setup_func)(char *);
242 int early;
243};
244
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251#define __setup_param(str, unique_id, fn, early) \
252 static const char __setup_str_##unique_id[] __initconst \
253 __aligned(1) = str; \
254 static struct obs_kernel_param __setup_##unique_id \
255 __used __section(.init.setup) \
256 __attribute__((aligned((sizeof(long))))) \
257 = { __setup_str_##unique_id, fn, early }
258
259#define __setup(str, fn) \
260 __setup_param(str, fn, fn, 0)
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265
266#define early_param(str, fn) \
267 __setup_param(str, fn, fn, 1)
268
269#define early_param_on_off(str_on, str_off, var, config) \
270 \
271 int var = IS_ENABLED(config); \
272 \
273 static int __init parse_##var##_on(char *arg) \
274 { \
275 var = 1; \
276 return 0; \
277 } \
278 __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \
279 \
280 static int __init parse_##var##_off(char *arg) \
281 { \
282 var = 0; \
283 return 0; \
284 } \
285 __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
286
287
288void __init parse_early_param(void);
289void __init parse_early_options(char *cmdline);
290#endif
291
292#else
293
294#define __setup_param(str, unique_id, fn)
295#define __setup(str, func)
296#endif
297
298
299#define __nosavedata __section(.data..nosave)
300
301#ifdef MODULE
302#define __exit_p(x) x
303#else
304#define __exit_p(x) NULL
305#endif
306
307#endif
308