diff options
author | Zheng Da <zhengda1936@gmail.com> | 2009-12-06 05:26:23 +0100 |
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committer | Zheng Da <zhengda1936@gmail.com> | 2009-12-06 05:26:23 +0100 |
commit | 8a6d48c0542876eb3acfc0970c0ab7872db08d5f (patch) | |
tree | 496e78bc728317ea779781b92f897d16936ee231 /libdde_linux26/include/linux/.svn/text-base/init.h.svn-base | |
parent | b4bffcfcdf3ab7a55d664e9aa5907f88da503f38 (diff) |
check in the original version of dde linux26.
Diffstat (limited to 'libdde_linux26/include/linux/.svn/text-base/init.h.svn-base')
-rw-r--r-- | libdde_linux26/include/linux/.svn/text-base/init.h.svn-base | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/libdde_linux26/include/linux/.svn/text-base/init.h.svn-base b/libdde_linux26/include/linux/.svn/text-base/init.h.svn-base new file mode 100644 index 00000000..13b3d9c9 --- /dev/null +++ b/libdde_linux26/include/linux/.svn/text-base/init.h.svn-base @@ -0,0 +1,374 @@ +#ifndef _LINUX_INIT_H +#define _LINUX_INIT_H + +#ifdef DDE_LINUX +#include <l4/dde/ddekit/initcall.h> +#endif +#include <linux/compiler.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 char linux_logo[] __initdata = { 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". + */ + +/* These are for everybody (although not all archs will actually + discard it in modules) */ +#ifndef DDE_LINUX +#define __init __section(.init.text) __cold notrace +#else +#define __init __used +#endif +#define __initdata __section(.init.data) +#define __initconst __section(.init.rodata) +#define __exitdata __section(.exit.data) +#define __exit_call __used __section(.exitcall.exit) + +/* modpost check for section mismatches during the kernel build. + * A section mismatch happens when there are references from a + * code or data section to an init section (both code or data). + * The init sections are (for most archs) discarded by the kernel + * when early init has completed so all such references are potential bugs. + * For exit sections the same issue exists. + * The following markers are used for the cases where the reference to + * the *init / *exit section (code or data) is valid and will teach + * modpost not to issue a warning. + * The markers follow same syntax rules as __init / __initdata. */ +#define __ref __section(.ref.text) noinline +#define __refdata __section(.ref.data) +#define __refconst __section(.ref.rodata) + +/* backward compatibility note + * A few places hardcode the old section names: + * .text.init.refok + * .data.init.refok + * .exit.text.refok + * They should be converted to use the defines from this file + */ + +/* compatibility defines */ +#define __init_refok __ref +#define __initdata_refok __refdata +#define __exit_refok __ref + + +#ifdef MODULE +#define __exitused +#else +#define __exitused __used +#endif + +#define __exit __section(.exit.text) __exitused __cold + +/* Used for HOTPLUG */ +#define __devinit __section(.devinit.text) __cold +#define __devinitdata __section(.devinit.data) +#define __devinitconst __section(.devinit.rodata) +#define __devexit __section(.devexit.text) __exitused __cold +#define __devexitdata __section(.devexit.data) +#define __devexitconst __section(.devexit.rodata) + +/* Used for HOTPLUG_CPU */ +#define __cpuinit __section(.cpuinit.text) __cold +#define __cpuinitdata __section(.cpuinit.data) +#define __cpuinitconst __section(.cpuinit.rodata) +#define __cpuexit __section(.cpuexit.text) __exitused __cold +#define __cpuexitdata __section(.cpuexit.data) +#define __cpuexitconst __section(.cpuexit.rodata) + +/* Used for MEMORY_HOTPLUG */ +#define __meminit __section(.meminit.text) __cold +#define __meminitdata __section(.meminit.data) +#define __meminitconst __section(.meminit.rodata) +#define __memexit __section(.memexit.text) __exitused __cold +#define __memexitdata __section(.memexit.data) +#define __memexitconst __section(.memexit.rodata) + +/* For assembly routines */ +#define __HEAD .section ".head.text","ax" +#define __INIT .section ".init.text","ax" +#define __FINIT .previous + +#define __INITDATA .section ".init.data","aw" +#define __INITRODATA .section ".init.rodata","a" +#define __FINITDATA .previous + +#define __DEVINIT .section ".devinit.text", "ax" +#define __DEVINITDATA .section ".devinit.data", "aw" +#define __DEVINITRODATA .section ".devinit.rodata", "a" + +#define __CPUINIT .section ".cpuinit.text", "ax" +#define __CPUINITDATA .section ".cpuinit.data", "aw" +#define __CPUINITRODATA .section ".cpuinit.rodata", "a" + +#define __MEMINIT .section ".meminit.text", "ax" +#define __MEMINITDATA .section ".meminit.data", "aw" +#define __MEMINITRODATA .section ".meminit.rodata", "a" + +/* silence warnings when references are OK */ +#define __REF .section ".ref.text", "ax" +#define __REFDATA .section ".ref.data", "aw" +#define __REFCONST .section ".ref.rodata", "a" + +#ifndef __ASSEMBLY__ +/* + * Used for initialization calls.. + */ +typedef int (*initcall_t)(void); +typedef void (*exitcall_t)(void); + +extern initcall_t __con_initcall_start[], __con_initcall_end[]; +extern initcall_t __security_initcall_start[], __security_initcall_end[]; + +/* Defined in init/main.c */ +extern int do_one_initcall(initcall_t fn); +extern char __initdata boot_command_line[]; +extern char *saved_command_line; +extern unsigned int reset_devices; + +/* used by init/main.c */ +void setup_arch(char **); +void prepare_namespace(void); + +extern void (*late_time_init)(void); + +#endif + +#ifndef MODULE + +#ifndef __ASSEMBLY__ + +/* initcalls are now grouped by functionality into separate + * subsections. Ordering inside the subsections is determined + * by link order. + * For backwards compatibility, initcall() puts the call in + * the device init subsection. + * + * The `id' arg to __define_initcall() is needed so that multiple initcalls + * can point at the same handler without causing duplicate-symbol build errors. + */ + +#ifndef DDE_LINUX +#define __define_initcall(level,fn,id) \ + static initcall_t __initcall_##fn##id __used \ + __attribute__((__section__(".initcall" level ".init"))) = fn +#else // DDE_LINUX +// XXX: DDE CTORs are executed in reverse order as was done by +// Linux' initcalls in earlier versions +#include <l4/dde/ddekit/initcall.h> +#define __define_initcall(level,fn,id) DDEKIT_CTOR(fn,level) +#endif + +/* + * Early initcalls run before initializing SMP. + * + * Only for built-in code, not modules. + */ +#define early_initcall(fn) __define_initcall("early",fn,early) + +/* + * A "pure" initcall has no dependencies on anything else, and purely + * initializes variables that couldn't be statically initialized. + * + * This only exists for built-in code, not for modules. + */ +#ifndef DDE_LINUX +#define pure_initcall(fn) __define_initcall("0",fn,0) + +#define core_initcall(fn) __define_initcall("1",fn,1) +#define core_initcall_sync(fn) __define_initcall("1s",fn,1s) +#define postcore_initcall(fn) __define_initcall("2",fn,2) +#define postcore_initcall_sync(fn) __define_initcall("2s",fn,2s) +#define arch_initcall(fn) __define_initcall("3",fn,3) +#define arch_initcall_sync(fn) __define_initcall("3s",fn,3s) +#define subsys_initcall(fn) __define_initcall("4",fn,4) +#define subsys_initcall_sync(fn) __define_initcall("4s",fn,4s) +#define fs_initcall(fn) __define_initcall("5",fn,5) +#define fs_initcall_sync(fn) __define_initcall("5s",fn,5s) +#define rootfs_initcall(fn) __define_initcall("rootfs",fn,rootfs) +#define device_initcall(fn) __define_initcall("6",fn,6) +#define device_initcall_sync(fn) __define_initcall("6s",fn,6s) +#define late_initcall(fn) __define_initcall("7",fn,7) +#define late_initcall_sync(fn) __define_initcall("7s",fn,7s) +#else /* DDE_LINUX */ +#define pure_initcall(fn) __define_initcall(1000,fn,1000) + +//#define dde_initcall(fn) __define_initcall(1009,fn,10) +//#define dde_process_initcall(fn) __define_initcall(1008,fn,10) +#define core_initcall(fn) __define_initcall(1000,fn,7) +#define core_initcall_sync(fn) __define_initcall(1007s,fn,7s) +#define postcore_initcall(fn) __define_initcall(1001,fn,6) +#define postcore_initcall_sync(fn) __define_initcall(1006s,fn,6s) +#define arch_initcall(fn) __define_initcall(1002,fn,5) +#define arch_initcall_sync(fn) __define_initcall(1005s,fn,5s) +#define subsys_initcall(fn) __define_initcall(1003,fn,4) +#define subsys_initcall_sync(fn) __define_initcall(1004s,fn,4s) +#define fs_initcall(fn) __define_initcall(1004,fn,3) +#define fs_initcall_sync(fn) __define_initcall(1003s,fn,3s) +//#define rootfs_initcall(fn) __define_initcall(ootfs,fn,rootfs) +#define device_initcall(fn) __define_initcall(1005,fn,2) +#define device_initcall_sync(fn) __define_initcall(1002s,fn,2s) +#define late_initcall(fn) __define_initcall(1006,fn,1) +#define late_initcall_sync(fn) __define_initcall(1001s,fn,1s) +#endif + +#define __initcall(fn) device_initcall(fn) + +#ifndef DDE_LINUX +#define __exitcall(fn) \ + static exitcall_t __exitcall_##fn __exit_call = fn +#else +#define __exitcall(fn) +#endif + +#define console_initcall(fn) \ + static initcall_t __initcall_##fn \ + __used __section(.con_initcall.init) = fn + +#define security_initcall(fn) \ + static initcall_t __initcall_##fn \ + __used __section(.security_initcall.init) = fn + +struct obs_kernel_param { + const char *str; + int (*setup_func)(char *); + int early; +}; + +/* + * Only for really core code. See moduleparam.h for the normal way. + * + * Force the alignment so the compiler doesn't space elements of the + * obs_kernel_param "array" too far apart in .init.setup. + */ +#define __setup_param(str, unique_id, fn, early) \ + static char __setup_str_##unique_id[] __initdata __aligned(1) = str; \ + static struct obs_kernel_param __setup_##unique_id \ + __used __section(.init.setup) \ + __attribute__((aligned((sizeof(long))))) \ + = { __setup_str_##unique_id, fn, early } + +#define __setup(str, fn) \ + __setup_param(str, fn, fn, 0) + +/* NOTE: fn is as per module_param, not __setup! Emits warning if fn + * returns non-zero. */ +#define early_param(str, fn) \ + __setup_param(str, fn, fn, 1) + +/* Relies on boot_command_line being set */ +void __init parse_early_param(void); +#endif /* __ASSEMBLY__ */ + +/** + * module_init() - driver initialization entry point + * @x: function to be run at kernel boot time or module insertion + * + * module_init() will either be called during do_initcalls() (if + * builtin) or at module insertion time (if a module). There can only + * be one per module. + */ +#define module_init(x) __initcall(x); + +/** + * module_exit() - driver exit entry point + * @x: function to be run when driver is removed + * + * module_exit() will wrap the driver clean-up code + * with cleanup_module() when used with rmmod when + * the driver is a module. If the driver is statically + * compiled into the kernel, module_exit() has no effect. + * There can only be one per module. + */ +#define module_exit(x) __exitcall(x); + +#else /* MODULE */ + +/* Don't use these in modules, but some people do... */ +#define core_initcall(fn) module_init(fn) +#define postcore_initcall(fn) module_init(fn) +#define arch_initcall(fn) module_init(fn) +#define subsys_initcall(fn) module_init(fn) +#define fs_initcall(fn) module_init(fn) +#define device_initcall(fn) module_init(fn) +#define late_initcall(fn) module_init(fn) + +#define security_initcall(fn) module_init(fn) + +/* Each module must use one module_init(). */ +#define module_init(initfn) \ + static inline initcall_t __inittest(void) \ + { return initfn; } \ + int init_module(void) __attribute__((alias(#initfn))); + +/* This is only required if you want to be unloadable. */ +#define module_exit(exitfn) \ + static inline exitcall_t __exittest(void) \ + { return exitfn; } \ + void cleanup_module(void) __attribute__((alias(#exitfn))); + +#define __setup_param(str, unique_id, fn) /* nothing */ +#define __setup(str, func) /* nothing */ +#endif + +/* Data marked not to be saved by software suspend */ +#define __nosavedata __section(.data.nosave) + +/* This means "can be init if no module support, otherwise module load + may call it." */ +#ifdef CONFIG_MODULES +#define __init_or_module +#define __initdata_or_module +#else +#define __init_or_module __init +#define __initdata_or_module __initdata +#endif /*CONFIG_MODULES*/ + +/* Functions marked as __devexit may be discarded at kernel link time, depending + on config options. Newer versions of binutils detect references from + retained sections to discarded sections and flag an error. Pointers to + __devexit functions must use __devexit_p(function_name), the wrapper will + insert either the function_name or NULL, depending on the config options. + */ +#if defined(MODULE) || defined(CONFIG_HOTPLUG) +#define __devexit_p(x) x +#else +#define __devexit_p(x) NULL +#endif + +#ifdef MODULE +#define __exit_p(x) x +#else +#define __exit_p(x) NULL +#endif + +#endif /* _LINUX_INIT_H */ |