1 #ifndef __LINUX_KCONFIG_H
2 #define __LINUX_KCONFIG_H
4 #include <generated/autoconf.h>
7 * Helper macros to use CONFIG_ options in C/CPP expressions. Note that
8 * these only work with boolean and tristate options.
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.
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
26 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
30 #define IS_ENABLED(option) \
31 (config_enabled(option) || config_enabled(option##_MODULE))
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).
38 #define IS_BUILTIN(option) config_enabled(option)
41 * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
44 #define IS_MODULE(option) config_enabled(option##_MODULE)
47 * U-Boot add-on: Helper macros to reference to different macros
48 * (CONFIG_ or CONFIG_SPL_ prefixed), depending on the build context.
50 #ifdef CONFIG_SPL_BUILD
54 #ifdef CONFIG_TPL_BUILD
58 #if defined(CONFIG_TPL_BUILD)
59 #define config_val(cfg) _config_val(_IS_TPL, cfg)
60 #define _config_val(x, cfg) __config_val(x, cfg)
61 #define __config_val(x, cfg) ___config_val(__ARG_PLACEHOLDER_##x, cfg)
62 #define ___config_val(arg1_or_junk, cfg) \
63 ____config_val(arg1_or_junk CONFIG_TPL_##cfg, CONFIG_##cfg)
64 #define ____config_val(__ignored, val, ...) val
66 #define config_val(cfg) _config_val(_IS_SPL, cfg)
67 #define _config_val(x, cfg) __config_val(x, cfg)
68 #define __config_val(x, cfg) ___config_val(__ARG_PLACEHOLDER_##x, cfg)
69 #define ___config_val(arg1_or_junk, cfg) \
70 ____config_val(arg1_or_junk CONFIG_SPL_##cfg, CONFIG_##cfg)
71 #define ____config_val(__ignored, val, ...) val
75 * CONFIG_VAL(FOO) evaluates to the value of
76 * CONFIG_FOO if CONFIG_SPL_BUILD is undefined,
77 * CONFIG_SPL_FOO if CONFIG_SPL_BUILD is defined.
79 #define CONFIG_VAL(option) config_val(option)
82 * CONFIG_IS_ENABLED(FOO) evaluates to
83 * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y' or 'm',
84 * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y' or 'm',
87 #define CONFIG_IS_ENABLED(option) \
88 (config_enabled(CONFIG_VAL(option)) || \
89 config_enabled(CONFIG_VAL(option##_MODULE)))
92 * CONFIG_IS_BUILTIN(FOO) evaluates to
93 * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
94 * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
97 #define CONFIG_IS_BUILTIN(option) config_enabled(CONFIG_VAL(option))
100 * CONFIG_IS_MODULE(FOO) evaluates to
101 * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'm',
102 * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'm',
105 #define CONFIG_IS_MODULE(option) config_enabled(CONFIG_VAL(option##_MODULE))
107 #endif /* __LINUX_KCONFIG_H */