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arch: arm: add initial support for CONFIG_USERSPACE

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add related configs & (stub) functions for enabling
CONFIG_USERSPACE on arm w/o build errors.

Signed-off-by: Chunlin Han <chunlin.han@linaro.org>
This commit is contained in:
Chunlin Han 2017-09-26 20:59:35 +08:00 • committed by Andrew Boie
commit 95d28e53bb
4 changed files with 111 additions and 0 deletions
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11
kernel/include/ksched.h
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@ -526,7 +526,18 @@ static inline struct k_thread *_unpend_first_thread(_wait_q_t *wait_q)
*/
static inline int _is_thread_user(void)
{
#ifdef CONFIG_ARCH_HAS_CUSTOM_SWAP_TO_MAIN
/* the _current might be NULL before the first thread is scheduled if
* CONFIG_ARCH_HAS_CUSTOM_SWAP_TO_MAIN is enabled.
*/
if (!_current) {
return 0;
}
return _current->base.user_options & K_USER;
#else
return _current->base.user_options & K_USER;
#endif
}
#endif /* CONFIG_USERSPACE */
#endif /* _ksched__h_ */