tree 4512a25b7200e1c84cb07aa64a17f98c46a1a13f
parent bea8ef1d8a9f82c5954c8fbba03a8f3fce7efd68
author Simon Glass <sjg@chromium.org> 1646408580 -0700
committer Tom Rini <trini@konsulko.com> 1646918916 -0500

event: Add basic support for events

Add a way to create and dispatch events without needing to allocate
memory. Also add a way to 'spy' on events, thus allowing 'hooks' to be
created.

Use a linker list for static events, which we can use to replace functions
like arch_cpu_init_f(). Allow an EVENT_DEBUG option which makes it
easier to see what is going on at runtime, but uses more code space.

Dynamic events allow the creation of a spy at runtime. This is not always
necessary, but can be enabled with EVENT_DYNAMIC if needed.

A 'test' event is the only option for now.

Signed-off-by: Simon Glass <sjg@chromium.org>