cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kconfig.h (2691B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __LINUX_KCONFIG_H
      3#define __LINUX_KCONFIG_H
      4
      5#include <generated/autoconf.h>
      6
      7#ifdef CONFIG_CPU_BIG_ENDIAN
      8#define __BIG_ENDIAN 4321
      9#else
     10#define __LITTLE_ENDIAN 1234
     11#endif
     12
     13#define __ARG_PLACEHOLDER_1 0,
     14#define __take_second_arg(__ignored, val, ...) val
     15
     16/*
     17 * The use of "&&" / "||" is limited in certain expressions.
     18 * The following enable to calculate "and" / "or" with macro expansion only.
     19 */
     20#define __and(x, y)			___and(x, y)
     21#define ___and(x, y)			____and(__ARG_PLACEHOLDER_##x, y)
     22#define ____and(arg1_or_junk, y)	__take_second_arg(arg1_or_junk y, 0)
     23
     24#define __or(x, y)			___or(x, y)
     25#define ___or(x, y)			____or(__ARG_PLACEHOLDER_##x, y)
     26#define ____or(arg1_or_junk, y)		__take_second_arg(arg1_or_junk 1, y)
     27
     28/*
     29 * Helper macros to use CONFIG_ options in C/CPP expressions. Note that
     30 * these only work with boolean and tristate options.
     31 */
     32
     33/*
     34 * Getting something that works in C and CPP for an arg that may or may
     35 * not be defined is tricky.  Here, if we have "#define CONFIG_BOOGER 1"
     36 * we match on the placeholder define, insert the "0," for arg1 and generate
     37 * the triplet (0, 1, 0).  Then the last step cherry picks the 2nd arg (a one).
     38 * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
     39 * the last step cherry picks the 2nd arg, we get a zero.
     40 */
     41#define __is_defined(x)			___is_defined(x)
     42#define ___is_defined(val)		____is_defined(__ARG_PLACEHOLDER_##val)
     43#define ____is_defined(arg1_or_junk)	__take_second_arg(arg1_or_junk 1, 0)
     44
     45/*
     46 * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
     47 * otherwise. For boolean options, this is equivalent to
     48 * IS_ENABLED(CONFIG_FOO).
     49 */
     50#define IS_BUILTIN(option) __is_defined(option)
     51
     52/*
     53 * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
     54 * otherwise.  CONFIG_FOO=m results in "#define CONFIG_FOO_MODULE 1" in
     55 * autoconf.h.
     56 */
     57#define IS_MODULE(option) __is_defined(option##_MODULE)
     58
     59/*
     60 * IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
     61 * code can call a function defined in code compiled based on CONFIG_FOO.
     62 * This is similar to IS_ENABLED(), but returns false when invoked from
     63 * built-in code when CONFIG_FOO is set to 'm'.
     64 */
     65#define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
     66				__and(IS_MODULE(option), __is_defined(MODULE)))
     67
     68/*
     69 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
     70 * 0 otherwise.  Note that CONFIG_FOO=y results in "#define CONFIG_FOO 1" in
     71 * autoconf.h, while CONFIG_FOO=m results in "#define CONFIG_FOO_MODULE 1".
     72 */
     73#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
     74
     75#endif /* __LINUX_KCONFIG_H */