128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_UML_INIT_H
|
|
#define _LINUX_UML_INIT_H
|
|
|
|
/* These macros are used to mark some functions or
|
|
* initialized data (doesn't apply to uninitialized data)
|
|
* as `initialization' functions. The kernel can take this
|
|
* as hint that the function is used only during the initialization
|
|
* phase and free up used memory resources after
|
|
*
|
|
* Usage:
|
|
* For functions:
|
|
*
|
|
* You should add __init immediately before the function name, like:
|
|
*
|
|
* static void __init initme(int x, int y)
|
|
* {
|
|
* extern int z; z = x * y;
|
|
* }
|
|
*
|
|
* If the function has a prototype somewhere, you can also add
|
|
* __init between closing brace of the prototype and semicolon:
|
|
*
|
|
* extern int initialize_foobar_device(int, int, int) __init;
|
|
*
|
|
* For initialized data:
|
|
* You should insert __initdata between the variable name and equal
|
|
* sign followed by value, e.g.:
|
|
*
|
|
* static int init_variable __initdata = 0;
|
|
* static const char linux_logo[] __initconst = { 0x32, 0x36, ... };
|
|
*
|
|
* Don't forget to initialize data not at file scope, i.e. within a function,
|
|
* as gcc otherwise puts the data into the bss section and not into the init
|
|
* section.
|
|
*
|
|
* Also note, that this data cannot be "const".
|
|
*/
|
|
|
|
#ifndef _LINUX_INIT_H
|
|
typedef int (*initcall_t)(void);
|
|
typedef void (*exitcall_t)(void);
|
|
|
|
#include <linux/compiler_types.h>
|
|
|
|
/* These are for everybody (although not all archs will actually
|
|
discard it in modules) */
|
|
#define __init __section(".init.text")
|
|
#define __initdata __section(".init.data")
|
|
#define __exitdata __section(".exit.data")
|
|
#define __exit_call __used __section(".exitcall.exit")
|
|
|
|
#ifdef MODULE
|
|
#define __exit __section(".exit.text")
|
|
#else
|
|
#define __exit __used __section(".exit.text")
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifndef MODULE
|
|
struct uml_param {
|
|
const char *str;
|
|
int (*setup_func)(char *, int *);
|
|
};
|
|
|
|
extern initcall_t __uml_postsetup_start, __uml_postsetup_end;
|
|
extern const char *__uml_help_start, *__uml_help_end;
|
|
#endif
|
|
|
|
#define __uml_exitcall(fn) \
|
|
static exitcall_t __uml_exitcall_##fn __uml_exit_call = fn
|
|
|
|
extern struct uml_param __uml_setup_start, __uml_setup_end;
|
|
|
|
#define __uml_postsetup(fn) \
|
|
static initcall_t __uml_postsetup_##fn __uml_postsetup_call = fn
|
|
|
|
#define __non_empty_string(dummyname,string) \
|
|
struct __uml_non_empty_string_struct_##dummyname \
|
|
{ \
|
|
char _string[sizeof(string)-2]; \
|
|
}
|
|
|
|
#ifndef MODULE
|
|
#define __uml_setup(str, fn, help...) \
|
|
__non_empty_string(fn ##_setup, str); \
|
|
__uml_help(fn, help); \
|
|
static char __uml_setup_str_##fn[] __initdata = str; \
|
|
static struct uml_param __uml_setup_##fn __uml_init_setup = { __uml_setup_str_##fn, fn }
|
|
#else
|
|
#define __uml_setup(str, fn, help...) \
|
|
|
|
#endif
|
|
|
|
#define __uml_help(fn, help...) \
|
|
__non_empty_string(fn ##__help, help); \
|
|
static char __uml_help_str_##fn[] __initdata = help; \
|
|
static const char *__uml_help_##fn __uml_setup_help = __uml_help_str_##fn
|
|
|
|
/*
|
|
* Mark functions and data as being only used at initialization
|
|
* or exit time.
|
|
*/
|
|
#define __uml_init_setup __used __section(".uml.setup.init")
|
|
#define __uml_setup_help __used __section(".uml.help.init")
|
|
#define __uml_postsetup_call __used __section(".uml.postsetup.init")
|
|
#define __uml_exit_call __used __section(".uml.exitcall.exit")
|
|
|
|
#ifdef __UM_HOST__
|
|
|
|
#define __define_initcall(level,fn) \
|
|
static initcall_t __initcall_##fn __used \
|
|
__attribute__((__section__(".initcall" level ".init"))) = fn
|
|
|
|
/* Userspace initcalls shouldn't depend on anything in the kernel, so we'll
|
|
* make them run first.
|
|
*/
|
|
#define __initcall(fn) __define_initcall("1", fn)
|
|
|
|
#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
|
|
|
|
#define __init_call __used __section(".initcall.init")
|
|
|
|
#endif
|
|
|
|
#endif /* _LINUX_UML_INIT_H */
|