mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
5500a408dd
At present we must separately test for the host build for many options,
since we force them to be enabled. For example, CONFIG_FIT is always
enabled in the host tools, even if CONFIG_FIT is not enabled by the
board itself.
It would be more convenient if we could use, for example,
CONFIG_IS_ENABLED(FIT) and get CONFIG_HOST_FIT, when building for the
host. Add support for this.
With this and the tools_build() function, we should be able to remove all
the #ifdefs currently needed in code that is build by tools and targets.
This will be even nicer when we move to using CONFIG(xxx) everywhere,
since all the #ifdef and IS_ENABLED/CONFIG_IS_ENABLED stuff will go away.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> # b4f73886
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
#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',
|
|
* 0 otherwise.
|
|
*
|
|
*/
|
|
#define IS_ENABLED(option) \
|
|
(config_enabled(option))
|
|
|
|
/*
|
|
* U-Boot add-on: Helper macros to reference to different macros (prefixed by
|
|
* CONFIG_, CONFIG_SPL_, CONFIG_TPL_ or CONFIG_TOOLS_), depending on the build
|
|
* context.
|
|
*/
|
|
|
|
#ifdef USE_HOSTCC
|
|
#define _CONFIG_PREFIX TOOLS_
|
|
#elif defined(CONFIG_TPL_BUILD)
|
|
#define _CONFIG_PREFIX TPL_
|
|
#elif defined(CONFIG_SPL_BUILD)
|
|
#define _CONFIG_PREFIX SPL_
|
|
#else
|
|
#define _CONFIG_PREFIX
|
|
#endif
|
|
|
|
#define config_val(cfg) _config_val(_CONFIG_PREFIX, cfg)
|
|
#define _config_val(pfx, cfg) __config_val(pfx, cfg)
|
|
#define __config_val(pfx, cfg) CONFIG_ ## pfx ## cfg
|
|
|
|
/*
|
|
* CONFIG_VAL(FOO) evaluates to the value of
|
|
* CONFIG_TOOLS_FOO if USE_HOSTCC is defined,
|
|
* CONFIG_FOO if CONFIG_SPL_BUILD is undefined,
|
|
* CONFIG_SPL_FOO if CONFIG_SPL_BUILD is defined.
|
|
* CONFIG_TPL_FOO if CONFIG_TPL_BUILD is defined.
|
|
*/
|
|
#define CONFIG_VAL(option) config_val(option)
|
|
|
|
/*
|
|
* Count number of arguments to a variadic macro. Currently only need
|
|
* it for 1, 2 or 3 arguments.
|
|
*/
|
|
#define __arg6(a1, a2, a3, a4, a5, a6, ...) a6
|
|
#define __count_args(...) __arg6(dummy, ##__VA_ARGS__, 4, 3, 2, 1, 0)
|
|
|
|
#define __concat(a, b) ___concat(a, b)
|
|
#define ___concat(a, b) a ## b
|
|
|
|
#define __unwrap(...) __VA_ARGS__
|
|
#define __unwrap1(case1, case0) __unwrap case1
|
|
#define __unwrap0(case1, case0) __unwrap case0
|
|
|
|
#define __CONFIG_IS_ENABLED_1(option) __CONFIG_IS_ENABLED_3(option, (1), (0))
|
|
#define __CONFIG_IS_ENABLED_2(option, case1) __CONFIG_IS_ENABLED_3(option, case1, ())
|
|
#define __CONFIG_IS_ENABLED_3(option, case1, case0) \
|
|
__concat(__unwrap, config_enabled(CONFIG_VAL(option))) (case1, case0)
|
|
|
|
/*
|
|
* CONFIG_IS_ENABLED(FOO) expands to
|
|
* 1 if USE_HOSTCC is defined and CONFIG_TOOLS_FOO is set to 'y',
|
|
* 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',
|
|
* 1 if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
|
|
* 0 otherwise.
|
|
*
|
|
* CONFIG_IS_ENABLED(FOO, (abc)) expands to
|
|
* abc if USE_HOSTCC is defined and CONFIG_TOOLS_FOO is set to 'y',
|
|
* abc if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
|
|
* abc if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
|
|
* abc if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
|
|
* nothing otherwise.
|
|
*
|
|
* CONFIG_IS_ENABLED(FOO, (abc), (def)) expands to
|
|
* abc if USE_HOSTCC is defined and CONFIG_TOOLS_FOO is set to 'y',
|
|
* abc if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
|
|
* abc if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
|
|
* abc if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
|
|
* def otherwise.
|
|
*
|
|
* The optional second and third arguments must be parenthesized; that
|
|
* allows one to include a trailing comma, e.g. for use in
|
|
*
|
|
* CONFIG_IS_ENABLED(ACME, ({.compatible = "acme,frobnozzle"},))
|
|
*
|
|
* which adds an entry to the array being defined if CONFIG_ACME (or
|
|
* CONFIG_SPL_ACME/CONFIG_TPL_ACME, depending on build context) is
|
|
* set, and nothing otherwise.
|
|
*/
|
|
|
|
#define CONFIG_IS_ENABLED(option, ...) \
|
|
__concat(__CONFIG_IS_ENABLED_, __count_args(option, ##__VA_ARGS__)) (option, ##__VA_ARGS__)
|
|
|
|
|
|
#endif /* __LINUX_KCONFIG_H */
|