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git.odroid.com / yocto / uboot / 7d78a4547db67aae87efd522a68f59aa9bde6577 / . / include / linux / kconfig.h
blob: caea505a0e60814efbb6ab90bc26b4a1ec4e2d74 [file] [log] [blame]
Masahiro Yamada0a9064f2014-07-30 14:08:13 +0900[diff] [blame]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/*
Rasmus Villemoes7d78a452020-07-03 10:37:05 -0600[diff] [blame^]26 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y',
Masahiro Yamada0a9064f2014-07-30 14:08:13 +0900[diff] [blame]27 * 0 otherwise.
28 *
29 */
30#define IS_ENABLED(option) \
Rasmus Villemoes7d78a452020-07-03 10:37:05 -0600[diff] [blame^]31 (config_enabled(option))
Masahiro Yamada0a9064f2014-07-30 14:08:13 +0900[diff] [blame]32
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]33/*
34 * U-Boot add-on: Helper macros to reference to different macros
35 * (CONFIG_ or CONFIG_SPL_ prefixed), depending on the build context.
36 */
Philipp Tomsichf1c6e192017-06-30 19:02:53 +0200[diff] [blame]37
38#if defined(CONFIG_TPL_BUILD)
Rasmus Villemoesb4f73882020-07-03 10:37:04 -0600[diff] [blame]39#define _CONFIG_PREFIX TPL_
40#elif defined(CONFIG_SPL_BUILD)
41#define _CONFIG_PREFIX SPL_
Philipp Tomsichf1c6e192017-06-30 19:02:53 +0200[diff] [blame]42#else
Rasmus Villemoesb4f73882020-07-03 10:37:04 -0600[diff] [blame]43#define _CONFIG_PREFIX
Philipp Tomsichf1c6e192017-06-30 19:02:53 +0200[diff] [blame]44#endif
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]45
Rasmus Villemoesb4f73882020-07-03 10:37:04 -0600[diff] [blame]46#define config_val(cfg) _config_val(_CONFIG_PREFIX, cfg)
47#define _config_val(pfx, cfg) __config_val(pfx, cfg)
48#define __config_val(pfx, cfg) CONFIG_ ## pfx ## cfg
49
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]50/*
51 * CONFIG_VAL(FOO) evaluates to the value of
52 * CONFIG_FOO if CONFIG_SPL_BUILD is undefined,
53 * CONFIG_SPL_FOO if CONFIG_SPL_BUILD is defined.
Lukasz Majewskifd75bf72019-09-03 15:43:55 +0200[diff] [blame]54 * CONFIG_TPL_FOO if CONFIG_TPL_BUILD is defined.
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]55 */
56#define CONFIG_VAL(option) config_val(option)
57
58/*
59 * CONFIG_IS_ENABLED(FOO) evaluates to
Rasmus Villemoes7d78a452020-07-03 10:37:05 -0600[diff] [blame^]60 * 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
61 * 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
62 * 1 if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]63 * 0 otherwise.
64 */
65#define CONFIG_IS_ENABLED(option) \
Rasmus Villemoes7d78a452020-07-03 10:37:05 -0600[diff] [blame^]66 (config_enabled(CONFIG_VAL(option)))
Masahiro Yamada8be60f02015-08-12 07:31:43 +0900[diff] [blame]67
Masahiro Yamada0a9064f2014-07-30 14:08:13 +0900[diff] [blame]68#endif /* __LINUX_KCONFIG_H */