#ifndef __LINUX_KCONFIG_H #define __LINUX_KCONFIG_H #include <generated/autoconf.h> /* * Helper macros to use CONFIG_ options in C/CPP expressions. Note that * these only work with boolean and tristate options. */ /* * Getting something that works in C and CPP for an arg that may or may * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" * we match on the placeholder define, insert the "0," for arg1 and generate * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when * the last step cherry picks the 2nd arg, we get a zero. */ #define __ARG_PLACEHOLDER_1 0, #define config_enabled(cfg) _config_enabled(cfg) #define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value) #define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0) #define ___config_enabled(__ignored, val, ...) val /* * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm', * 0 otherwise. * */ #define IS_ENABLED(option) \ (config_enabled(option) || config_enabled(option##_MODULE)) /* * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 * otherwise. For boolean options, this is equivalent to * IS_ENABLED(CONFIG_FOO). */ #define IS_BUILTIN(option) config_enabled(option) /* * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0 * otherwise. */ #define IS_MODULE(option) config_enabled(option##_MODULE) /* * U-Boot add-on: Helper macros to reference to different macros * (CONFIG_ or CONFIG_SPL_ prefixed), depending on the build context. */ #ifdef CONFIG_SPL_BUILD #define _IS_SPL 1 #endif #define config_val(cfg) _config_val(_IS_SPL, cfg) #define _config_val(x, cfg) __config_val(x, cfg) #define __config_val(x, cfg) ___config_val(__ARG_PLACEHOLDER_##x, cfg) #define ___config_val(arg1_or_junk, cfg) \ ____config_val(arg1_or_junk CONFIG_SPL_##cfg, CONFIG_##cfg) #define ____config_val(__ignored, val, ...) val /* * CONFIG_VAL(FOO) evaluates to the value of * CONFIG_FOO if CONFIG_SPL_BUILD is undefined, * CONFIG_SPL_FOO if CONFIG_SPL_BUILD is defined. */ #define CONFIG_VAL(option) config_val(option) /* * CONFIG_IS_ENABLED(FOO) evaluates to * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y' or 'm', * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y' or 'm', * 0 otherwise. */ #define CONFIG_IS_ENABLED(option) \ (config_enabled(CONFIG_VAL(option)) || \ config_enabled(CONFIG_VAL(option##_MODULE))) /* * CONFIG_IS_BUILTIN(FOO) evaluates to * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y', * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y', * 0 otherwise. */ #define CONFIG_IS_BUILTIN(option) config_enabled(CONFIG_VAL(option)) /* * CONFIG_IS_MODULE(FOO) evaluates to * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'm', * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'm', * 0 otherwise. */ #define CONFIG_IS_MODULE(option) config_enabled(CONFIG_VAL(option##_MODULE)) #endif /* __LINUX_KCONFIG_H */