projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 0a9064fb MY |
1 | #ifndef __LINUX_KCONFIG_H |
| 2 | #define __LINUX_KCONFIG_H | |
| 3 | ||
| 4 | #include <generated/autoconf.h> | |
| 5 | ||
| 6 | /* | |
| 7 | * Helper macros to use CONFIG_ options in C/CPP expressions. Note that | |
| 8 | * these only work with boolean and tristate options. | |
| 9 | */ | |
| 10 | ||
| 11 | /* | |
| 12 | * Getting something that works in C and CPP for an arg that may or may | |
| 13 | * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" | |
| 14 | * we match on the placeholder define, insert the "0," for arg1 and generate | |
| 15 | * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). | |
| 16 | * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when | |
| 17 | * the last step cherry picks the 2nd arg, we get a zero. | |
| 18 | */ | |
| 19 | #define __ARG_PLACEHOLDER_1 0, | |
| 20 | #define config_enabled(cfg) _config_enabled(cfg) | |
| 21 | #define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value) | |
| 22 | #define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0) | |
| 23 | #define ___config_enabled(__ignored, val, ...) val | |
| 24 | ||
| 25 | /* | |
| 26 | * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm', | |
| 27 | * 0 otherwise. | |
| 28 | * | |
| 29 | */ | |
| 30 | #define IS_ENABLED(option) \ | |
| 31 | (config_enabled(option) || config_enabled(option##_MODULE)) | |
| 32 | ||
| 33 | /* | |
| 34 | * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 | |
| 35 | * otherwise. For boolean options, this is equivalent to | |
| 36 | * IS_ENABLED(CONFIG_FOO). | |
| 37 | */ | |
| 38 | #define IS_BUILTIN(option) config_enabled(option) | |
| 39 | ||
| 40 | /* | |
| 41 | * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0 | |
| 42 | * otherwise. | |
| 43 | */ | |
| 44 | #define IS_MODULE(option) config_enabled(option##_MODULE) | |
| 45 | ||
| 8be60f06 MY |
46 | /* |
| 47 | * U-Boot add-on: Helper macros to reference to different macros | |
| 48 | * (CONFIG_ or CONFIG_SPL_ prefixed), depending on the build context. | |
| 49 | */ | |
| 50 | #ifdef CONFIG_SPL_BUILD | |
| 51 | #define _IS_SPL 1 | |
| 52 | #endif | |
| 53 | ||
| 54 | #define config_val(cfg) _config_val(_IS_SPL, cfg) | |
| 55 | #define _config_val(x, cfg) __config_val(x, cfg) | |
| 56 | #define __config_val(x, cfg) ___config_val(__ARG_PLACEHOLDER_##x, cfg) | |
| 57 | #define ___config_val(arg1_or_junk, cfg) \ | |
| 58 | ____config_val(arg1_or_junk CONFIG_SPL_##cfg, CONFIG_##cfg) | |
| 59 | #define ____config_val(__ignored, val, ...) val | |
| 60 | ||
| 61 | /* | |
| 62 | * CONFIG_VAL(FOO) evaluates to the value of | |
| 63 | * CONFIG_FOO if CONFIG_SPL_BUILD is undefined, | |
| 64 | * CONFIG_SPL_FOO if CONFIG_SPL_BUILD is defined. | |
| 65 | */ | |
| 66 | #define CONFIG_VAL(option) config_val(option) | |
| 67 | ||
| 68 | /* | |
| 69 | * CONFIG_IS_ENABLED(FOO) evaluates to | |
| 70 | * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y' or 'm', | |
| 71 | * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y' or 'm', | |
| 72 | * 0 otherwise. | |
| 73 | */ | |
| 74 | #define CONFIG_IS_ENABLED(option) \ | |
| 75 | (config_enabled(CONFIG_VAL(option)) || \ | |
| 76 | config_enabled(CONFIG_VAL(option##_MODULE))) | |
| 77 | ||
| 78 | /* | |
| 79 | * CONFIG_IS_BUILTIN(FOO) evaluates to | |
| 80 | * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y', | |
| 81 | * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y', | |
| 82 | * 0 otherwise. | |
| 83 | */ | |
| 84 | #define CONFIG_IS_BUILTIN(option) config_enabled(CONFIG_VAL(option)) | |
| 85 | ||
| 86 | /* | |
| 87 | * CONFIG_IS_MODULE(FOO) evaluates to | |
| 88 | * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'm', | |
| 89 | * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'm', | |
| 90 | * 0 otherwise. | |
| 91 | */ | |
| 92 | #define CONFIG_IS_MODULE(option) config_enabled(CONFIG_VAL(option##_MODULE)) | |
| 93 | ||
| 0a9064fb | 94 | #endif /* __LINUX_KCONFIG_H */ |